{"id":23388,"date":"2026-04-05T15:15:36","date_gmt":"2026-04-05T07:15:36","guid":{"rendered":"https:\/\/viox.com\/?p=23388"},"modified":"2026-04-05T15:15:39","modified_gmt":"2026-04-05T07:15:39","slug":"how-to-read-dc-isolator-switch-ratings-voltage-current-poles-and-utilization-categories","status":"publish","type":"post","link":"https:\/\/test.viox.com\/my\/how-to-read-dc-isolator-switch-ratings-voltage-current-poles-and-utilization-categories\/","title":{"rendered":"How to Read DC Isolator Switch Ratings: Voltage, Current, Poles, and Utilization Categories"},"content":{"rendered":"<div class=\"product-intro\">\n<h2>\u1010\u102d\u102f\u1000\u103a\u101b\u102d\u102f\u1000\u103a\u1021\u1016\u103c\u1031<\/h2>\n<p>Reading a <a href=\"https:\/\/test.viox.com\/my\/dc-isolator-switch\/\">DC isolator switch<\/a> label correctly comes down to four things, checked in this order:<\/p>\n<ul>\n<li><strong>\u1017\u102d\u102f\u1037\u1021\u102c\u1038\u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a<\/strong> \u2014 can the switch safely handle the highest DC voltage in your system?<\/li>\n<li><strong>\u101c\u1000\u103a\u101b\u103e\u102d \u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a<\/strong> \u2014 can it carry the expected continuous current without overheating?<\/li>\n<li><strong>Pole configuration<\/strong> \u2014 how many conductors does it disconnect at the same time?<\/li>\n<li><strong>\u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f \u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038<\/strong> \u2014 what kind of DC switching duty was it actually tested for?<\/li>\n<\/ul>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Engineer-inspecting-DC-isolator-switch-ratings-on-a-photovoltaic-installation.webp\" alt=\"Engineer inspecting DC isolator switch ratings on a photovoltaic installation\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">An engineer carefully inspecting the ratings on a DC isolator switch at a solar PV installation to ensure system safety and compliance.<\/figcaption><\/figure>\n<p>The order matters. In practice, the most frequent rating mistakes happen when buyers focus on the ampere number first and overlook the voltage class or utilization category. A 32 A isolator is not automatically suitable for every 32 A DC circuit, especially in solar PV systems, where cold-weather Voc, pole arrangement, and DC switching duty can change the answer completely.<\/p>\n<p>If you need the broader device background first, start with <a href=\"https:\/\/test.viox.com\/my\/what-is-a-dc-isolator-switch\/\">DC Isolator Switch \u1006\u102d\u102f\u1010\u102c\u1018\u102c\u101c\u1032\u104b<\/a>. If you already have a label, datasheet, or product spec sheet in front of you, this guide will walk you through what each line means and what to verify next.<\/p>\n<h2>\u1021\u1019\u103c\u1014\u103a\u1000\u102d\u102f\u1038\u1000\u102c\u1038\u1007\u101a\u102c\u1038<\/h2>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>Rating item<\/th>\n<th>What it tells you<\/th>\n<th>\u1021\u101e\u102f\u1036\u1038\u1019\u103b\u102c\u1038\u101e\u1031\u102c\u1021\u1019\u103e\u102c\u1038<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u1017\u102d\u102f\u1037\u1021\u102c\u1038\u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a (Ue)<\/strong><\/td>\n<td>Maximum DC operating voltage the switch can handle under its stated duty<\/td>\n<td>Matching only nominal system voltage and ignoring cold-corrected PV Voc<\/td>\n<\/tr>\n<tr>\n<td><strong>Current rating (Ie)<\/strong><\/td>\n<td>Current the switch can carry under the specified duty<\/td>\n<td>Assuming the current rating stays the same in every enclosure and temperature condition<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1011\u1019\u103a\u1038\u1018\u102d\u102f\u1038<\/strong><\/td>\n<td>How many conductors are disconnected together<\/td>\n<td>Treating 2P and 4P as interchangeable<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f \u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038<\/strong><\/td>\n<td>The type of switching duty the device was tested for<\/td>\n<td>Ignoring whether the switch was rated for the actual DC load condition<\/td>\n<\/tr>\n<tr>\n<td><strong>Certification or standard basis<\/strong><\/td>\n<td>Which market and testing framework the device aligns with<\/td>\n<td>Using AC-marked or vaguely described products in a PV DC application<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-infographic-showing-how-to-read-ratings-on-a-photovoltaic-DC-isolator-switch.webp\" alt=\"Technical infographic showing how to read ratings on a photovoltaic DC isolator switch\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">A technical infographic detailing the key metrics and ratings to look for on a photovoltaic DC isolator switch nameplate.<\/figcaption><\/figure>\n<h2>Why Reading the Label Matters More Than You Might Expect<\/h2>\n<p>A DC isolator switch label is not catalog decoration. It is a compact summary of the conditions under which the device was proven to work safely.<\/p>\n<p>This is especially important in solar PV because:<\/p>\n<ul>\n<li>the array voltage changes with temperature, and a cold morning can push Voc well above nominal<\/li>\n<li>the DC side remains energized whenever there is daylight<\/li>\n<li>DC arcs behave differently from AC arcs, making switching conditions more demanding<\/li>\n<li>product markings may look similar on the surface while the real application limits differ significantly<\/li>\n<\/ul>\n<p>With that in mind, the safest approach is to work through each rating one at a time.<\/p>\n<h2>Voltage Rating: Start Here First<\/h2>\n<p>The first number to check is the rated DC voltage, often shown as <code>Ue<\/code> or listed as a maximum DC operating voltage.<\/p>\n<h3>What the voltage rating means<\/h3>\n<p>The voltage rating tells you the maximum DC system voltage the isolator can handle under the duty for which it was tested. In PV work, this is critical because the device may be used at:<\/p>\n<ul>\n<li>600 VDC<\/li>\n<li>800 VDC<\/li>\n<li>1000 VDC<\/li>\n<li>1200 VDC<\/li>\n<li>or 1500 VDC, depending on the installation architecture<\/li>\n<\/ul>\n<h3>The most common mistake: using nominal voltage instead of maximum corrected voltage<\/h3>\n<p>In solar systems, you do not select the isolator based on the nominal DC system label alone. You need the maximum open-circuit voltage, including cold-temperature correction.<\/p>\n<p>Consider this scenario: a PV string is designed for a \u201c1000 V system,\u201d but on a cold winter morning the actual Voc reaches 1050 V. If the isolator is only rated for 1000 VDC, it is effectively under-rated, even though everything looked fine on the quotation sheet.<\/p>\n<p>This is one reason a DC isolator in PV systems should be reviewed with the same engineering discipline as other high-risk DC equipment.<\/p>\n<h3>Quick voltage check example<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>Scenario<\/th>\n<th>System label<\/th>\n<th>Actual cold-morning Voc<\/th>\n<th>Required minimum Ue<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Rooftop PV, temperate climate<\/strong><\/td>\n<td>1000 VDC<\/td>\n<td>1035 V<\/td>\n<td>At least above 1035 VDC, with project margin as required<\/td>\n<\/tr>\n<tr>\n<td><strong>Utility-scale PV, cold region<\/strong><\/td>\n<td>1500 VDC<\/td>\n<td>1540 V<\/td>\n<td>Requires careful string design or a suitably rated higher-voltage solution<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The takeaway is simple: always size the voltage rating against the worst-case corrected Voc, not the system nameplate.<\/p>\n<h2>Current Rating: More Than Just an Amp Number<\/h2>\n<p>The next item is the current rating, often shown as <code>Ie<\/code>.<\/p>\n<h3>What the current rating means<\/h3>\n<p>\u101c\u1000\u103a\u101b\u103e\u102d\u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a\u101e\u100a\u103a \u1011\u102f\u1010\u103a\u1000\u102f\u1014\u103a\u1005\u1036\u1014\u103e\u102f\u1014\u103a\u1038\u1014\u103e\u1004\u1037\u103a \u1011\u102f\u1010\u103a\u101c\u102f\u1015\u103a\u101e\u1030\u1019\u103e \u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1011\u102c\u1038\u101e\u1031\u102c\u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1019\u103b\u102c\u1038\u1021\u1031\u102c\u1000\u103a\u1010\u103d\u1004\u103a isolator \u101e\u100a\u103a \u1019\u100a\u103a\u1019\u103b\u103e\u1000\u103c\u102c\u1000\u103c\u102c \u1006\u1000\u103a\u1010\u102d\u102f\u1000\u103a\u101e\u101a\u103a\u1006\u1031\u102c\u1004\u103a\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a\u1000\u102d\u102f \u1015\u103c\u1031\u102c\u1015\u103c\u101e\u100a\u103a\u104b \u1010\u1000\u101a\u1037\u103a\u1015\u101b\u1031\u102c\u1002\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u1010\u103d\u1004\u103a \u1011\u102d\u102f\u1014\u1036\u1015\u102b\u1010\u103a\u1000\u102d\u102f \u1024\u1021\u101b\u102c\u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u1010\u102d\u102f\u1000\u103a\u1005\u1005\u103a\u1006\u1031\u1038\u101e\u1004\u1037\u103a\u101e\u100a\u103a-<\/p>\n<ul>\n<li>\u1019\u103b\u103e\u1031\u102c\u103a\u1019\u103e\u1014\u103a\u1038\u1011\u102c\u1038\u101e\u1031\u102c \u101c\u100a\u103a\u1015\u1010\u103a\u1014\u1031\u101e\u1031\u102c \u101c\u103b\u103e\u1015\u103a\u1005\u102e\u1038\u1000\u103c\u1031\u102c\u1004\u103a\u1038<\/li>\n<li>\u1010\u1015\u103a\u1006\u1004\u103a\u101e\u100a\u1037\u103a\u1014\u1031\u101b\u102c\u101b\u103e\u102d \u1015\u1010\u103a\u101d\u1014\u103a\u1038\u1000\u103b\u1004\u103a\u1021\u1015\u1030\u1001\u103b\u102d\u1014\u103a<\/li>\n<li>\u101e\u1000\u103a\u1006\u102d\u102f\u1004\u103a\u101e\u100a\u1037\u103a\u1014\u1031\u101b\u102c\u1010\u103d\u1004\u103a \u1021\u1019\u103c\u1004\u1037\u103a<\/li>\n<li>\u1021\u1000\u102c\u1021\u101b\u1036 \u1021\u1015\u1030\u1015\u1031\u1038\u101e\u100a\u1037\u103a \u1021\u1000\u103b\u102d\u102f\u1038\u101e\u1000\u103a\u101b\u1031\u102c\u1000\u103a\u1019\u103e\u102f\u1019\u103b\u102c\u1038<\/li>\n<li>conductor \u1021\u102f\u1015\u103a\u1005\u102f\u1016\u103d\u1032\u1037\u1001\u103c\u1004\u103a\u1038<\/li>\n<li>\u1011\u102f\u1010\u103a\u101c\u102f\u1015\u103a\u101e\u1030\u1019\u103e \u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1011\u102c\u1038\u1015\u102b\u1000 \u1010\u1015\u103a\u1006\u1004\u103a\u1019\u103e\u102f \u1026\u1038\u1010\u100a\u103a\u1001\u103b\u1000\u103a<\/li>\n<\/ul>\n<h3>\u101c\u1000\u103a\u101b\u103e\u102d\u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1010\u100a\u103a\u1038\u1000 \u1021\u1000\u103c\u1031\u102c\u1004\u103a\u1038\u1005\u102f\u1036\u1000\u102d\u102f \u1021\u1018\u101a\u103a\u1000\u103c\u1031\u102c\u1004\u1037\u103a \u1019\u1015\u103c\u1031\u102c\u1015\u103c\u1014\u102d\u102f\u1004\u103a\u101e\u1014\u100a\u103a\u1038\u104b<\/h3>\n<p>isolator \u1014\u103e\u1005\u103a\u1001\u102f\u1005\u101c\u102f\u1036\u1038\u1000\u102d\u102f \u1010\u1036\u1006\u102d\u1015\u103a\u1000\u1015\u103a\u1011\u102c\u1038\u101e\u100a\u103a\u104b <code>32 A<\/code> \u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1010\u102d\u102f\u1004\u103a\u1038\u1010\u103d\u1004\u103a \u1010\u1030\u100a\u102e\u1005\u103d\u102c \u101e\u1004\u1037\u103a\u101c\u103b\u1031\u102c\u103a\u1019\u100a\u103a\u1019\u101f\u102f\u1010\u103a\u1015\u102b\u104b.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>\u1021\u1001\u103b\u1000\u103a<\/th>\n<th>Isolator A (32 A)<\/th>\n<th>Isolator B (32 A)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u1021\u1000\u102c\u1021\u101b\u1036 \u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038<\/strong><\/td>\n<td>\u101c\u1031\u101d\u1004\u103a\u101c\u1031\u1011\u103d\u1000\u103a\u1000\u1031\u102c\u1004\u103a\u1038\u101e\u1031\u102c \u1021\u102d\u1019\u103a\u1010\u103d\u1004\u103a\u1038 panel<\/td>\n<td>\u1010\u1036\u1006\u102d\u1015\u103a\u1001\u1010\u103a\u1011\u102c\u1038\u101e\u1031\u102c \u1015\u103c\u1004\u103a\u1015 PV \u1015\u1031\u102b\u1004\u103a\u1038\u1005\u1015\u103a\u1011\u102c\u1038\u101e\u1031\u102c \u1018\u1030\u1038\u104a 55 \u00b0C \u1015\u1010\u103a\u101d\u1014\u103a\u1038\u1000\u103b\u1004\u103a<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f \u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038<\/strong><\/td>\n<td>DC-21B<\/td>\n<td>DC-PV2<\/td>\n<\/tr>\n<tr>\n<td><strong>Pole configuration<\/strong><\/td>\n<td>2P<\/td>\n<td>\u1044P<\/td>\n<\/tr>\n<tr>\n<td><strong>30 A \u1021\u1019\u102d\u102f\u1038\u1015\u1031\u102b\u103a PV \u1000\u103c\u102d\u102f\u1038\u1021\u1010\u103d\u1000\u103a \u101c\u1000\u103a\u1010\u103d\u1031\u1037\u1000\u103b\u101e\u1031\u102c \u101e\u1004\u1037\u103a\u101c\u103b\u1031\u102c\u103a\u1019\u103e\u102f<\/strong><\/td>\n<td>\u1021\u1015\u1030\u1001\u103b\u102d\u1014\u103a\u1000\u103c\u1031\u102c\u1004\u1037\u103a \u101c\u103b\u103e\u1031\u102c\u1037\u1001\u103b\u101b\u1014\u103a \u101c\u102d\u102f\u1021\u1015\u103a\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a<\/td>\n<td>\u1012\u102e\u1007\u102d\u102f\u1004\u103a\u1038\u1021\u1015\u103c\u100a\u1037\u103a\u1021\u1005\u102f\u1036\u1000\u102d\u102f \u1015\u103c\u1014\u103a\u101c\u100a\u103a\u101e\u102f\u1036\u1038\u101e\u1015\u103a\u1015\u103c\u102e\u1038\u1014\u1031\u102c\u1000\u103a \u1015\u102d\u102f\u1019\u102d\u102f\u101e\u1004\u1037\u103a\u101c\u103b\u1031\u102c\u103a\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u1021\u1013\u102d\u1000\u1021\u1001\u103b\u1000\u103a\u1019\u103e\u102c \u1010\u1005\u103a\u1001\u102f\u101e\u100a\u103a \u1021\u1001\u103c\u102c\u1038\u1010\u1005\u103a\u1001\u102f\u1011\u1000\u103a \u1021\u1019\u103c\u1032\u1010\u1019\u103a\u1038\u1015\u102d\u102f\u1000\u1031\u102c\u1004\u103a\u1038\u101e\u100a\u103a\u1019\u101f\u102f\u1010\u103a\u1015\u102b\u104b \u101c\u1000\u103a\u101b\u103e\u102d\u1000\u102d\u102f \u1017\u102d\u102f\u1037\u1021\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1014\u103e\u1004\u1037\u103a\u1021\u1010\u1030 \u1021\u1019\u103c\u1032\u1016\u1010\u103a\u101e\u1004\u1037\u103a\u101e\u100a\u103a\u104a \u101e\u102e\u1038\u1001\u103c\u102c\u1038\u1016\u1010\u103a\u104d\u1019\u101b\u1015\u102b\u104b.<\/p>\n<h2>Poles: 2P \u1014\u103e\u1004\u1037\u103a 4P \u1010\u102d\u102f\u1037\u104f \u1021\u1013\u102d\u1015\u1039\u1015\u102c\u101a\u103a\u1021\u1019\u103e\u1014\u103a<\/h2>\n<p>Pole configuration \u101e\u100a\u103a switch \u101e\u100a\u103a \u1010\u1005\u103a\u1001\u103b\u102d\u1014\u103a\u1010\u100a\u103a\u1038\u1010\u103d\u1004\u103a conductor \u1019\u100a\u103a\u1019\u103b\u103e\u1016\u103d\u1004\u1037\u103a\u101e\u100a\u103a\u1000\u102d\u102f \u1015\u103c\u1031\u102c\u1015\u103c\u101e\u100a\u103a\u104b.<\/p>\n<h3>2-pole isolator<\/h3>\n<p>\u1010\u1032\u1037 <strong>2P<\/strong> DC isolator \u1000\u102d\u102f \u1021\u1015\u103c\u102f\u101e\u1018\u1031\u102c\u1006\u1031\u102c\u1004\u103a\u101e\u1031\u102c conductor \u1010\u1005\u103a\u1001\u102f\u1014\u103e\u1004\u1037\u103a \u1021\u1014\u102f\u1010\u103a\u101c\u1000\u1039\u1001\u100f\u102c\u1006\u1031\u102c\u1004\u103a\u101e\u1031\u102c conductor \u1010\u1005\u103a\u1001\u102f\u1000\u102d\u102f \u1000\u103c\u102d\u102f\u1038\u1010\u1005\u103a\u1001\u102f\u1010\u100a\u103a\u1038 \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a DC circuit \u1010\u1005\u103a\u1001\u102f\u1010\u100a\u103a\u1038\u1021\u1010\u103d\u1000\u103a \u1001\u103b\u102d\u1010\u103a\u1006\u1000\u103a\u1019\u103e\u102f\u1016\u103c\u1010\u103a\u1010\u1031\u102c\u1000\u103a\u101e\u100a\u1037\u103a\u1014\u1031\u101b\u102c\u1010\u103d\u1004\u103a \u1021\u1019\u103b\u102c\u1038\u1021\u102c\u1038\u1016\u103c\u1004\u1037\u103a \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u101e\u100a\u103a\u104b.<\/p>\n<h3>4-pole isolator<\/h3>\n<p>\u1010\u1032\u1037 <strong>\u1044P<\/strong> DC isolator \u1000\u102d\u102f \u1000\u103c\u102d\u102f\u1038\u1014\u103e\u1005\u103a\u1001\u103b\u1031\u102c\u1004\u103a\u1038 \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1019\u1010\u1030\u100a\u102e\u101e\u1031\u102c conductor \u1005\u102e\u1005\u1009\u103a\u1019\u103e\u102f\u1000\u102d\u102f \u1005\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1010\u100a\u103a\u1038\u1016\u103c\u1004\u1037\u103a \u1001\u103b\u102d\u1010\u103a\u1006\u1000\u103a\u1019\u103e\u102f\u1016\u103c\u1010\u103a\u1010\u1031\u102c\u1000\u103a\u101e\u100a\u1037\u103a\u1014\u1031\u101b\u102c\u1019\u103b\u102c\u1038\u1010\u103d\u1004\u103a \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1021\u1010\u103d\u1004\u103a\u1038\u1015\u102d\u102f\u1004\u103a\u1038 switching \u101c\u1019\u103a\u1038\u1000\u103c\u1031\u102c\u1004\u103a\u1038\u1000\u102d\u102f \u1006\u1000\u103a\u1010\u102d\u102f\u1000\u103a\u1001\u103b\u102d\u1010\u103a\u1006\u1000\u103a\u1011\u102c\u1038\u101e\u1031\u102c poles \u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u104d \u1019\u103c\u1004\u1037\u103a\u1019\u102c\u1038\u101e\u1031\u102c DC \u1017\u102d\u102f\u1037\u1021\u102c\u1038\u1000\u102d\u102f \u1005\u102e\u1019\u1036\u1001\u1014\u1037\u103a\u1001\u103d\u1032\u101b\u1014\u103a\u1021\u1010\u103d\u1000\u103a \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u101e\u100a\u103a\u104b.<\/p>\n<h3>pole \u1021\u101b\u1031\u1021\u1010\u103d\u1000\u103a\u101e\u100a\u103a \u1021\u1018\u101a\u103a\u1000\u103c\u1031\u102c\u1004\u1037\u103a \u1021\u102c\u101b\u102f\u1036\u1005\u102d\u102f\u1000\u103a\u101e\u1004\u1037\u103a\u101e\u1014\u100a\u103a\u1038\u104b<\/h3>\n<p>poles \u1019\u103b\u102c\u1038\u1000\u102d\u102f \u101b\u102d\u102f\u1038\u101b\u103e\u1004\u103a\u1038\u101e\u1031\u102c wiring \u1021\u1006\u1004\u103a\u1015\u103c\u1031\u1019\u103e\u102f\u1010\u1005\u103a\u1001\u102f\u1021\u1016\u103c\u1005\u103a \u1010\u103d\u1031\u1038\u1010\u1031\u102c\u101b\u1014\u103a \u101c\u103d\u101a\u103a\u1000\u1030\u101e\u100a\u103a\u104b \u101c\u1000\u103a\u1010\u103d\u1031\u1037\u1010\u103d\u1004\u103a pole \u1021\u101b\u1031\u1021\u1010\u103d\u1000\u103a\u101e\u100a\u103a \u1024\u1021\u101b\u102c\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1011\u102d\u1001\u102d\u102f\u1000\u103a\u1005\u1031\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a-<\/p>\n<ul>\n<li>conductors \u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1021\u1019\u103e\u1014\u103a\u1010\u1000\u101a\u103a \u1019\u100a\u103a\u101e\u102d\u102f\u1037 \u1021\u1014\u103e\u1031\u102c\u1004\u1037\u103a\u1021\u101a\u103e\u1000\u103a\u1015\u1031\u1038\u101e\u1014\u100a\u103a\u1038\u104b<\/li>\n<li>\u1021\u1019\u103b\u102c\u1038\u1006\u102f\u1036\u1038\u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1014\u102d\u102f\u1004\u103a\u101e\u1031\u102c \u1017\u102d\u102f\u1037\u1021\u102c\u1038\u104a \u1006\u1000\u103a\u1010\u102d\u102f\u1000\u103a\u1001\u103b\u102d\u1010\u103a\u1006\u1000\u103a\u1011\u102c\u1038\u101e\u1031\u102c poles \u1019\u103b\u102c\u1038\u101e\u100a\u103a \u1005\u103d\u1019\u103a\u1038\u1006\u1031\u102c\u1004\u103a\u101b\u100a\u103a\u1000\u102d\u102f \u1010\u102d\u102f\u1038\u1001\u103b\u1032\u1037\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u1037\u103a\u1014\u1031\u101b\u102c<\/li>\n<li>\u1021\u1010\u103d\u1004\u103a\u1038\u1015\u102d\u102f\u1004\u103a\u1038 contact configuration<\/li>\n<li>\u101c\u1000\u103a\u1001\u1036\u1011\u102c\u1038\u101e\u1031\u102c wiring \u1014\u100a\u103a\u1038\u101c\u1019\u103a\u1038<\/li>\n<\/ul>\n<p>4-pole switch \u101e\u100a\u103a \u101b\u102d\u102f\u1038\u101b\u102d\u102f\u1038\u101b\u103e\u1004\u103a\u1038\u101b\u103e\u1004\u103a\u1038 \u201c\u1015\u102d\u102f\u1000\u103c\u102e\u1038\u101e\u1031\u102c 2-pole switch\u201d \u1019\u101f\u102f\u1010\u103a\u1015\u102b\u104b \u1011\u102f\u1010\u103a\u101c\u102f\u1015\u103a\u101e\u1030\u104f \u1001\u103b\u102d\u1010\u103a\u1006\u1000\u103a\u1019\u103e\u102f\u1015\u102f\u1036\u101e\u100a\u103a poles \u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1019\u100a\u103a\u101e\u102d\u102f\u1037 wiring \u101c\u102f\u1015\u103a\u101e\u1004\u1037\u103a\u101e\u100a\u103a\u1000\u102d\u102f \u1006\u102f\u1036\u1038\u1016\u103c\u1010\u103a\u1015\u1031\u1038\u1006\u1032\u1016\u103c\u1005\u103a\u1015\u103c\u102e\u1038 \u104e\u1004\u103a\u1038\u1000\u102d\u102f \u1019\u103e\u102c\u1038\u101a\u103d\u1004\u103a\u1038\u1005\u103d\u102c\u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103c\u1004\u103a\u1038\u101e\u100a\u103a \u1018\u1031\u1038\u1000\u1004\u103a\u1038\u101c\u102f\u1036\u1001\u103c\u102f\u1036\u101b\u1031\u1038\u1006\u102d\u102f\u1004\u103a\u101b\u102c \u1015\u103c\u103f\u1014\u102c\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1016\u1014\u103a\u1010\u102e\u1038\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a\u104b.<\/p>\n<p>wiring \u1014\u100a\u103a\u1038\u101c\u1019\u103a\u1038\u101e\u100a\u103a \u101e\u1004\u103a\u104f\u1021\u1013\u102d\u1000\u1019\u1031\u1038\u1001\u103d\u1014\u103a\u1038\u1016\u103c\u1005\u103a\u1015\u102b\u1000 \u1014\u1031\u102c\u1000\u103a\u1006\u1000\u103a\u1010\u103d\u1032\u1005\u102c\u1019\u103b\u1000\u103a\u1014\u103e\u102c\u1019\u103e\u102c <a href=\"https:\/\/test.viox.com\/my\/connection-of-dc-isolators\/\">\u1012\u102e\u1005\u102e \u1021\u102d\u102f\u1004\u103a\u1006\u102d\u102f\u101c\u1031\u1010\u102c\u1019\u103b\u102c\u1038 \u1001\u103b\u102d\u1010\u103a\u1006\u1000\u103a\u1001\u103c\u1004\u103a\u1038 (Connection of DC Isolators)<\/a>.<\/p>\n<h2>\u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038- \u101c\u1030\u1021\u1019\u103b\u102c\u1038\u1005\u102f \u1000\u103b\u1031\u102c\u103a\u101e\u103d\u102c\u1038\u1010\u1010\u103a\u1015\u103c\u102e\u1038 \u1019\u1000\u103b\u1031\u102c\u103a\u101e\u1004\u1037\u103a\u101e\u1031\u102c \u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a<\/h2>\n<p>\u104e\u1004\u103a\u1038\u101e\u100a\u103a DC isolator spec sheet \u1010\u103d\u1004\u103a \u1021\u101b\u1031\u1038\u1000\u103c\u102e\u1038\u1006\u102f\u1036\u1038\u101c\u102d\u102f\u1004\u103a\u1038\u1019\u103b\u102c\u1038\u1011\u1032\u1019\u103e \u1010\u1005\u103a\u1001\u102f\u1016\u103c\u1005\u103a\u1015\u103c\u102e\u1038 \u1021\u101c\u103d\u1014\u103a\u101c\u103b\u1005\u103a\u101c\u103b\u1030\u101b\u103e\u102f\u1001\u1036\u101b\u1006\u102f\u1036\u1038\u1010\u1005\u103a\u1001\u102f\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b.<\/p>\n<h3>\u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u104f \u1021\u1013\u102d\u1015\u1039\u1015\u102c\u101a\u103a\u104a \u101b\u102d\u102f\u1038\u101b\u102d\u102f\u1038\u101b\u103e\u1004\u103a\u1038\u101b\u103e\u1004\u103a\u1038\u1015\u103c\u1031\u102c\u101b\u101c\u103b\u103e\u1004\u103a<\/h3>\n<p>\u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1000\u102d\u102f switch \u101e\u100a\u103a \u1011\u102d\u102f\u1010\u1036\u1006\u102d\u1015\u103a\u1000\u102d\u102f \u101e\u101a\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103d\u1004\u1037\u103a\u1019\u1015\u103c\u102f\u1019\u102e \u1016\u103c\u1010\u103a\u101e\u1014\u103a\u1038\u1001\u1032\u1037\u101e\u1031\u102c \u1005\u1019\u103a\u1038\u101e\u1015\u103a\u1019\u103e\u102f\u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1021\u1016\u103c\u1005\u103a \u1010\u103d\u1031\u1038\u1010\u1031\u102c\u1015\u102b\u104b \u1021\u1031\u102c\u1000\u103a\u1010\u103d\u1004\u103a <strong>IEC 60947-3<\/strong>, DC isolator \u1010\u102d\u102f\u1004\u103a\u1038\u1000\u102d\u102f \u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1011\u102c\u1038\u101e\u1031\u102c switching duty \u1014\u103e\u1004\u1037\u103a \u1006\u1014\u1037\u103a\u1000\u103b\u1004\u103a\u104d \u1005\u1019\u103a\u1038\u101e\u1015\u103a\u101e\u100a\u103a\u104a \u1006\u102d\u102f\u101c\u102d\u102f\u101e\u100a\u103a\u1019\u103e\u102c \u1017\u102d\u102f\u1037\u1021\u102c\u1038\u104a \u101c\u103b\u103e\u1015\u103a\u1005\u102e\u1038\u1000\u103c\u1031\u102c\u1004\u103a\u1038\u104a load \u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1014\u103e\u1004\u1037\u103a switching \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103b\u1000\u103a\u1021\u101b\u1031\u1021\u1010\u103d\u1000\u103a\u1000\u102d\u102f \u1015\u1031\u102b\u1004\u103a\u1038\u1005\u1015\u103a\u1011\u102c\u1038\u101e\u100a\u103a\u104b.<\/p>\n<p>\u1010\u1036\u1006\u102d\u1015\u103a\u1015\u1031\u102b\u103a\u1010\u103d\u1004\u103a \u101b\u102d\u102f\u1000\u103a\u1014\u103e\u102d\u1015\u103a\u1011\u102c\u1038\u101e\u1031\u102c \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u101e\u100a\u103a switch \u1021\u1031\u102c\u1004\u103a\u1019\u103c\u1004\u103a\u1001\u1032\u1037\u101e\u1031\u102c \u1005\u1019\u103a\u1038\u101e\u1015\u103a\u1019\u103e\u102f\u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1000\u102d\u102f \u1015\u103c\u1031\u102c\u1015\u103c\u101e\u100a\u103a\u104b \u101c\u1000\u103a\u1010\u103d\u1031\u1037\u1000\u103b\u101e\u1031\u102c \u1021\u101e\u102f\u1036\u1038\u1021\u1014\u103e\u102f\u1014\u103a\u1038\u1019\u103b\u102c\u1038\u1010\u103d\u1004\u103a \u104e\u1004\u103a\u1038\u101e\u100a\u103a \u1024\u1019\u1031\u1038\u1001\u103d\u1014\u103a\u1038\u1000\u102d\u102f \u1016\u103c\u1031\u101e\u100a\u103a-<\/p>\n<ul>\n<li>\u1024 switch \u1000\u102d\u102f \u1021\u1001\u103c\u1031\u1001\u1036\u104a \u1000\u1031\u102c\u1004\u103a\u1038\u1019\u103d\u1014\u103a\u1005\u103d\u102c\u1015\u103c\u102f\u1019\u1030\u101e\u1031\u102c resistive load \u1019\u103b\u102c\u1038\u1021\u1010\u103d\u1000\u103a\u101e\u102c \u1005\u1019\u103a\u1038\u101e\u1015\u103a\u1001\u1032\u1037\u1015\u102b\u101e\u101c\u102c\u1038\u104b<\/li>\n<li>\u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a inductive load \u1019\u103b\u102c\u1038 \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a photovoltaic-specific \u1021\u1015\u103c\u102f\u1021\u1019\u1030\u1019\u103b\u102c\u1038\u1015\u102b\u101d\u1004\u103a\u101e\u1031\u102c \u1015\u102d\u102f\u1019\u102d\u102f\u101c\u102d\u102f\u1021\u1015\u103a\u101e\u1031\u102c \u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1019\u103b\u102c\u1038\u1021\u1010\u103d\u1000\u103a \u1005\u1019\u103a\u1038\u101e\u1015\u103a\u1001\u1032\u1037\u1015\u102b\u101e\u101c\u102c\u1038\u104b<\/li>\n<\/ul>\n<h3>\u1021\u1011\u103d\u1031\u1011\u103d\u1031 DC \u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1019\u103b\u102c\u1038- DC-21B \u1014\u103e\u1004\u1037\u103a DC-22B<\/h3>\n<p>\u101b\u102d\u102f\u1038\u101b\u103e\u1004\u103a\u1038\u101e\u1031\u102c \u1021\u1006\u1004\u1037\u103a\u1010\u103d\u1004\u103a-<\/p>\n<ul>\n<li><strong>DC-21B<\/strong> resistive \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1021\u1014\u100a\u103a\u1038\u1004\u101a\u103a inductive DC load \u1019\u103b\u102c\u1038\u1000\u102d\u102f \u101c\u103d\u103e\u1019\u103a\u1038\u1001\u103c\u102f\u1036\u101e\u100a\u103a<\/li>\n<li><strong>DC-22B<\/strong> \u101b\u1031\u102c\u1014\u103e\u1031\u102c\u1011\u102c\u1038\u101e\u1031\u102c resistive \u1014\u103e\u1004\u1037\u103a inductive switching \u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u101c\u103d\u103e\u1019\u103a\u1038\u1001\u103c\u102f\u1036\u101e\u100a\u103a<\/li>\n<\/ul>\n<p>\u101e\u1004\u103a\u104f application \u1010\u103d\u1004\u103a \u1010\u102d\u102f\u1000\u103a\u101b\u102d\u102f\u1000\u103a resistive DC load \u1019\u103b\u102c\u1038\u1015\u102b\u101d\u1004\u103a\u1015\u102b\u1000 DC-21B \u101e\u100a\u103a \u101c\u102f\u1036\u101c\u1031\u102c\u1000\u103a\u1014\u102d\u102f\u1004\u103a\u1015\u102b\u101e\u100a\u103a\u104b \u1015\u102d\u102f\u1019\u102d\u102f\u101c\u102d\u102f\u1021\u1015\u103a\u101e\u1031\u102c \u101b\u1031\u102c\u1014\u103e\u1031\u102c\u1011\u102c\u1038\u101e\u1031\u102c load \u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1019\u103b\u102c\u1038\u1021\u1010\u103d\u1000\u103a DC-22B \u101e\u100a\u103a \u1015\u102d\u102f\u1019\u102d\u102f\u1001\u102d\u102f\u1004\u103a\u1019\u102c\u101e\u1031\u102c\u1021\u1001\u103c\u1031\u1001\u1036\u1000\u102d\u102f \u1015\u1031\u1038\u101e\u100a\u103a\u104b.<\/p>\n<h3>PV-specific \u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1019\u103b\u102c\u1038- DC-PV1 \u1014\u103e\u1004\u1037\u103a DC-PV2<\/h3>\n<p>application \u101e\u100a\u103a \u1021\u1011\u1030\u1038\u101e\u1016\u103c\u1004\u1037\u103a solar PV \u1016\u103c\u1005\u103a\u1015\u102b\u1000 \u1014\u1031\u102c\u1000\u103a\u1011\u1015\u103a\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1014\u103e\u1005\u103a\u1001\u102f\u101e\u100a\u103a \u1021\u101c\u103d\u1014\u103a\u101e\u1000\u103a\u1006\u102d\u102f\u1004\u103a\u101e\u100a\u103a-<\/p>\n<ul>\n<li><strong>DC-PV1<\/strong> standard PV switching duty \u1014\u103e\u1004\u1037\u103a \u1006\u1000\u103a\u1005\u1015\u103a\u1014\u1031\u101e\u100a\u103a\u104a \u101e\u102d\u101e\u102c\u1011\u1004\u103a\u101b\u103e\u102c\u1038\u101e\u1031\u102c overcurrent \u1019\u103b\u102c\u1038\u101e\u100a\u103a switching \u1016\u103c\u1005\u103a\u101b\u1015\u103a\u1000\u102d\u102f \u101c\u103d\u103e\u1019\u103a\u1038\u1019\u102d\u102f\u1038\u101b\u1014\u103a \u1019\u1019\u103b\u103e\u1031\u102c\u103a\u101c\u1004\u1037\u103a\u1011\u102c\u1038\u101e\u100a\u1037\u103a\u1014\u1031\u101b\u102c<\/li>\n<li><strong>DC-PV2<\/strong> \u1015\u103c\u1031\u102c\u1004\u103a\u1038\u1015\u103c\u1014\u103a\u101c\u103b\u103e\u1015\u103a\u1005\u102e\u1038\u1000\u103c\u1031\u102c\u1004\u103a\u1038\u1005\u102e\u1038\u1006\u1004\u103a\u1038\u1019\u103e\u102f \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1015\u102d\u102f\u1019\u102d\u102f\u1015\u103c\u1004\u103a\u1038\u1011\u1014\u103a\u101e\u1031\u102c overcurrent \u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1019\u103b\u102c\u1038 \u101b\u103e\u102d\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u1037\u103a\u1000\u102d\u1005\u1039\u1005\u1019\u103b\u102c\u1038\u1021\u1015\u102b\u1021\u101d\u1004\u103a \u1015\u102d\u102f\u1019\u102d\u102f\u101c\u102d\u102f\u1021\u1015\u103a\u101e\u1031\u102c photovoltaic switching \u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u1006\u1000\u103a\u1005\u1015\u103a\u1014\u1031\u101e\u100a\u103a<\/li>\n<\/ul>\n<p>\u1021\u1019\u102d\u102f\u1038\u1015\u1031\u102b\u103a\u1014\u103e\u1004\u1037\u103a \u1005\u102e\u1038\u1015\u103d\u102c\u1038\u1016\u103c\u1005\u103a PV \u1015\u101b\u1031\u102c\u1002\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u1005\u103d\u102c\u1010\u103d\u1004\u103a \u1012\u102e\u1007\u102d\u102f\u1004\u103a\u1014\u102c\u1019\u103b\u102c\u1038\u101e\u100a\u103a \u1015\u102d\u102f\u1014\u103e\u1005\u103a\u101e\u1000\u103a\u1000\u103c\u101e\u100a\u103a <strong>DC-PV2<\/strong> \u1021\u1018\u101a\u103a\u1000\u103c\u1031\u102c\u1004\u1037\u103a\u1006\u102d\u102f\u101e\u1031\u102c\u103a \u104e\u1004\u103a\u1038\u101e\u100a\u103a \u1015\u102d\u102f\u1019\u102d\u102f\u101c\u102d\u102f\u1021\u1015\u103a\u101e\u1031\u102c photovoltaic switching \u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u1015\u102d\u102f\u1019\u102d\u102f\u1000\u102d\u102f\u1000\u103a\u100a\u102e\u101e\u1031\u102c\u1000\u103c\u1031\u102c\u1004\u1037\u103a\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b \u101e\u102d\u102f\u1037\u101e\u1031\u102c\u103a \u1014\u1031\u102c\u1000\u103a\u1006\u102f\u1036\u1038\u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u1019\u103e\u102f\u101e\u100a\u103a \u1021\u1019\u103e\u1014\u103a\u1010\u1000\u101a\u103a\u1015\u101b\u1031\u102c\u1002\u103b\u1000\u103a\u1015\u102f\u1036\u1005\u1036\u1014\u103e\u1004\u1037\u103a switching duty \u1000\u102d\u102f \u101c\u102d\u102f\u1000\u103a\u1014\u102c\u101e\u1004\u1037\u103a\u101e\u100a\u103a\u104b.<\/p>\n<h3>\u101c\u1000\u103a\u1010\u103d\u1031\u1037\u1000\u103b\u101e\u1031\u102c \u1014\u103e\u102d\u102f\u1004\u103a\u1038\u101a\u103e\u1009\u103a\u1019\u103e\u102f<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>\u101c\u103b\u103e\u1031\u102c\u1000\u103a\u101c\u103d\u103e\u102c<\/th>\n<th>\u1021\u1014\u100a\u103a\u1038\u1006\u102f\u1036\u1038 \u1021\u1000\u103c\u1036\u1015\u103c\u102f\u1011\u102c\u1038\u101e\u1031\u102c \u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038<\/th>\n<th>\u1018\u102c\u1000\u103c\u1031\u102c\u1004\u1037\u103a\u101c\u1032\u104b<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u101b\u102d\u102f\u1038\u101b\u103e\u1004\u103a\u1038\u101e\u1031\u102c DC resistive load\u104a \u1005\u1000\u103a\u1019\u103e\u102f panel<\/strong><\/td>\n<td>DC-21B<\/td>\n<td>Load \u101e\u100a\u103a \u1001\u1014\u1037\u103a\u1019\u103e\u1014\u103a\u1038\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a\u104a PV-specific \u1021\u1015\u103c\u102f\u1021\u1019\u1030\u1019\u101b\u103e\u102d\u1015\u102b\u104b<\/td>\n<\/tr>\n<tr>\n<td><strong>DC \u1019\u1031\u102c\u103a\u1010\u102c circuit<\/strong><\/td>\n<td>DC-22B<\/td>\n<td>Inductive load \u101e\u100a\u103a \u1015\u102d\u102f\u1019\u102d\u102f\u101c\u102d\u102f\u1021\u1015\u103a\u101e\u1031\u102c switching \u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1016\u1014\u103a\u1010\u102e\u1038\u101e\u100a\u103a<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1021\u1019\u102d\u102f\u1038\u1015\u1031\u102b\u103a PV \u1000\u103c\u102d\u102f\u1038 isolator<\/strong><\/td>\n<td>DC-PV1 \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a DC-PV2<\/td>\n<td>PV-specific duty; switching \u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1019\u103b\u102c\u1038 \u1015\u102d\u102f\u1019\u102d\u102f\u101c\u102d\u102f\u1021\u1015\u103a\u101e\u100a\u1037\u103a\u1014\u1031\u101b\u102c\u1010\u103d\u1004\u103a DC-PV2 \u1000\u102d\u102f \u1019\u1000\u103c\u102c\u1001\u100f \u1014\u103e\u1005\u103a\u101e\u1000\u103a\u1000\u103c\u101e\u100a\u103a<\/td>\n<\/tr>\n<tr>\n<td><strong>parallel \u1000\u103c\u102d\u102f\u1038\u1019\u103b\u102c\u1038\u1015\u102b\u101e\u1031\u102c Utility-scale PV<\/strong><\/td>\n<td>DC-PV2 \u1021\u1016\u103c\u1005\u103a\u1019\u103b\u102c\u1038\u101e\u100a\u103a\u104b<\/td>\n<td>\u1015\u103c\u1031\u102c\u1004\u103a\u1038\u1015\u103c\u1014\u103a\u1005\u102e\u1038\u1000\u103c\u1031\u102c\u1004\u103a\u1038\u101c\u1019\u103a\u1038\u1000\u103c\u1031\u102c\u1004\u103a\u1038\u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u1019\u103c\u1004\u1037\u103a\u1019\u102c\u1038\u101e\u1031\u102c \u1001\u103b\u102d\u102f\u1037\u101a\u103d\u1004\u103a\u1038\u1019\u103e\u102f\u1005\u103d\u1019\u103a\u1038\u1021\u1004\u103a\u101e\u100a\u103a \u1015\u102d\u102f\u1019\u102d\u102f\u101c\u102d\u102f\u1021\u1015\u103a\u101e\u1031\u102c PV \u1010\u102c\u101d\u1014\u103a\u1000\u102d\u102f \u1021\u1010\u100a\u103a\u1015\u103c\u102f\u101c\u1031\u1037\u101b\u103e\u102d\u101e\u100a\u103a\u104b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u1011\u102f\u1010\u103a\u1000\u102f\u1014\u103a\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1014\u103e\u102d\u102f\u1004\u103a\u1038\u101a\u103e\u1009\u103a\u101e\u1031\u102c\u1021\u1001\u102b \u1021\u1018\u101a\u103a\u1000\u103c\u1031\u102c\u1004\u1037\u103a \u1024\u1021\u101b\u102c\u101e\u100a\u103a \u1021\u101b\u1031\u1038\u1000\u103c\u102e\u1038\u101e\u1014\u100a\u103a\u1038\u104b<\/h3>\n<p>\u101d\u101a\u103a\u101e\u1030\u1010\u1005\u103a\u1026\u1038\u101e\u100a\u103a \u1018\u1031\u1038\u1001\u103b\u1004\u103a\u1038\u1000\u1015\u103a\u101c\u103b\u1000\u103a\u101b\u103e\u102d\u101e\u1031\u102c isolator \u1014\u103e\u1005\u103a\u1001\u102f\u1000\u102d\u102f \u1010\u103d\u1031\u1037\u1019\u103c\u1004\u103a\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a-<\/p>\n<ul>\n<li><strong>\u1011\u102f\u1010\u103a\u1000\u102f\u1014\u103a X-<\/strong> <code>1000 VDC, 32 A, 4P, DC-21B<\/code><\/li>\n<li><strong>\u1011\u102f\u1010\u103a\u1000\u102f\u1014\u103a Y-<\/strong> <code>1000 VDC, 32 A, 4P, DC-PV2<\/code><\/li>\n<\/ul>\n<p>\u1017\u102d\u102f\u1037\u1021\u102c\u1038\u104a \u101c\u103b\u103e\u1015\u103a\u1005\u102e\u1038\u1000\u103c\u1031\u102c\u1004\u103a\u1038\u1014\u103e\u1004\u1037\u103a \u101d\u1004\u103a\u101b\u102d\u102f\u1038\u1021\u101b\u1031\u1021\u1010\u103d\u1000\u103a\u101e\u100a\u103a \u1010\u1030\u100a\u102e\u1015\u102b\u101e\u100a\u103a\u104b \u101e\u102d\u102f\u1037\u101e\u1031\u102c\u103a \u1011\u102f\u1010\u103a\u1000\u102f\u1014\u103a X \u1000\u102d\u102f \u101a\u1031\u1018\u1030\u101a\u103b\u1001\u1036\u1014\u102d\u102f\u1004\u103a\u101b\u100a\u103a\u101b\u103e\u102d\u101e\u1031\u102c DC \u1010\u102c\u101d\u1014\u103a\u1021\u1010\u103d\u1000\u103a \u1005\u1019\u103a\u1038\u101e\u1015\u103a\u1001\u1032\u1037\u1015\u103c\u102e\u1038 \u1011\u102f\u1010\u103a\u1000\u102f\u1014\u103a Y \u1000\u102d\u102f photovoltaic switching \u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1019\u103b\u102c\u1038\u1021\u1010\u103d\u1000\u103a \u1021\u1011\u1030\u1038\u1005\u1019\u103a\u1038\u101e\u1015\u103a\u1001\u1032\u1037\u101e\u100a\u103a\u104b PV application \u1021\u1010\u103d\u1000\u103a \u1011\u102f\u1010\u103a\u1000\u102f\u1014\u103a Y \u101e\u100a\u103a \u1015\u1011\u1019\u1010\u1005\u103a\u1001\u103b\u1000\u103a\u1010\u103d\u1004\u103a \u100a\u102e\u1019\u103b\u103e\u101e\u100a\u103a\u101f\u102f \u1011\u1004\u103a\u101b\u101e\u1031\u102c\u103a\u101c\u100a\u103a\u1038 \u1015\u102d\u102f\u1019\u102d\u102f\u101e\u1004\u1037\u103a\u101c\u103b\u1031\u102c\u103a\u101e\u1031\u102c \u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u1019\u103e\u102f\u1016\u103c\u1005\u103a\u101c\u1031\u1037\u101b\u103e\u102d\u101e\u100a\u103a\u104b.<\/p>\n<p>\u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u101e\u100a\u103a \u1021\u1004\u103a\u1002\u103b\u1004\u103a\u1014\u102e\u101a\u102c\u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u1019\u103e\u102f\u1000\u1031\u102c\u1004\u103a\u1038\u1010\u1005\u103a\u1001\u102f\u1014\u103e\u1004\u1037\u103a \u1021\u1015\u1031\u102b\u103a\u101a\u1036\u1000\u1010\u103a\u1010\u101c\u1031\u102c\u1000\u103a\u1014\u103e\u1004\u1037\u103a \u1000\u102d\u102f\u1000\u103a\u100a\u102e\u1019\u103e\u102f\u1010\u1005\u103a\u1001\u102f\u1000\u102d\u102f \u1015\u102d\u102f\u1004\u103a\u1038\u1001\u103c\u102c\u1038\u101c\u1031\u1037\u101b\u103e\u102d\u101e\u1031\u102c \u101c\u102d\u102f\u1004\u103a\u1038\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b.<\/p>\n<h2>\u1010\u1000\u101a\u1037\u103a\u1025\u1015\u1019\u102c\u1010\u1036\u1006\u102d\u1015\u103a\u1000\u102d\u102f \u1019\u100a\u103a\u101e\u102d\u102f\u1037\u1016\u1010\u103a\u101b\u1019\u100a\u103a\u1014\u100a\u103a\u1038\u104b<\/h2>\n<p>\u1024\u1000\u1032\u1037\u101e\u102d\u102f\u1037 \u1021\u1019\u103e\u1010\u103a\u1021\u101e\u102c\u1038\u1015\u103c\u102f\u1011\u102c\u1038\u101e\u1031\u102c DC isolator \u1010\u1005\u103a\u1001\u102f\u1000\u102d\u102f \u101e\u1004\u103a\u1000\u103c\u100a\u1037\u103a\u101b\u103e\u102f\u1014\u1031\u101e\u100a\u103a\u101f\u102f \u1019\u103c\u1004\u103a\u101a\u1031\u102c\u1004\u103a\u1000\u103c\u100a\u1037\u103a\u1015\u102b-<\/p>\n<p><code>1000 VDC, 32 A, 4P, IEC 60947-3, DC-PV2<\/code><\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Annotated-DC-isolator-switch-label-showing-how-to-identify-key-photovoltaic-ratings.webp\" alt=\"Annotated DC isolator switch label showing how to identify key photovoltaic ratings\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">\u101c\u1000\u103a\u1010\u103d\u1031\u1037\u1000\u1019\u1039\u1018\u102c DC isolator switch \u1010\u1036\u1006\u102d\u1015\u103a\u1014\u103e\u1004\u1037\u103a \u104e\u1004\u103a\u1038\u104f \u1021\u1013\u102d\u1000 photovoltaic \u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1001\u103d\u1032\u1001\u103c\u1019\u103a\u1038\u1005\u102d\u1010\u103a\u1016\u103c\u102c\u1011\u102c\u1038\u101e\u1031\u102c \u1019\u103e\u1010\u103a\u1005\u102f\u1015\u102b \u101c\u1019\u103a\u1038\u100a\u103d\u103e\u1014\u103a\u1010\u1005\u103a\u1001\u102f\u104b.<\/figcaption><\/figure>\n<p>\u1024\u1010\u103d\u1004\u103a \u1021\u1005\u102d\u1010\u103a\u1021\u1015\u102d\u102f\u1004\u103a\u1038\u1010\u1005\u103a\u1001\u102f\u1005\u102e\u1000 \u101e\u1004\u1037\u103a\u1021\u102c\u1038 \u1015\u103c\u1031\u102c\u1015\u103c\u101e\u100a\u103a-<\/p>\n<ul>\n<li><code>1000 VDC<\/code> \u2014 switch \u101e\u100a\u103a \u1016\u1031\u102c\u103a\u1015\u103c\u1011\u102c\u1038\u101e\u1031\u102c \u1010\u102c\u101d\u1014\u103a\u1021\u1031\u102c\u1000\u103a\u1010\u103d\u1004\u103a 1000 V \u1021\u1011\u102d DC \u1005\u1014\u1005\u103a\u1019\u103b\u102c\u1038\u1021\u1010\u103d\u1000\u103a \u101b\u100a\u103a\u101b\u103d\u101a\u103a\u1015\u102b\u101e\u100a\u103a\u104b<\/li>\n<li><code>32 A<\/code> \u2014 \u104e\u1004\u103a\u1038\u101e\u100a\u103a \u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1011\u102c\u1038\u101e\u1031\u102c\u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1019\u103b\u102c\u1038\u1021\u1031\u102c\u1000\u103a\u1010\u103d\u1004\u103a 32 A \u1021\u1011\u102d \u1006\u1000\u103a\u1010\u102d\u102f\u1000\u103a\u101e\u101a\u103a\u1006\u1031\u102c\u1004\u103a\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a\u104b<\/li>\n<li><code>\u1044P<\/code> \u2014 \u104e\u1004\u103a\u1038\u101e\u100a\u103a \u1021\u1010\u103d\u1004\u103a\u1038\u1015\u102d\u102f\u1004\u103a\u1038 switching \u1005\u102e\u1005\u1009\u103a\u1019\u103e\u102f \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a circuit architecture \u1019\u103e \u101c\u102d\u102f\u1021\u1015\u103a\u1014\u102d\u102f\u1004\u103a\u101e\u1031\u102c \u101d\u1004\u103a\u101b\u102d\u102f\u1038\u101c\u1031\u1038\u1001\u102f\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u101e\u100a\u103a\u104b<\/li>\n<li><code>IEC 60947-3<\/code> \u2014 switch \u101e\u100a\u103a \u101e\u1000\u103a\u1006\u102d\u102f\u1004\u103a\u101b\u102c IEC switch-disconnector \u1005\u1036\u1014\u103e\u102f\u1014\u103a\u1038\u1014\u103e\u1004\u1037\u103a\u1021\u100a\u102e \u1001\u103b\u102d\u1014\u103a\u100a\u103e\u102d\u1011\u102c\u1038\u101e\u100a\u103a\u104b<\/li>\n<li><code>DC-PV2<\/code> \u2014 switch \u1000\u102d\u102f \u1015\u102d\u102f\u1019\u102d\u102f\u101c\u102d\u102f\u1021\u1015\u103a\u101e\u1031\u102c photovoltaic switching \u1010\u102c\u101d\u1014\u103a\u1021\u1010\u103d\u1000\u103a \u1005\u1019\u103a\u1038\u101e\u1015\u103a\u1001\u1032\u1037\u101e\u100a\u103a\u104b<\/li>\n<\/ul>\n<h3>\u1021\u1004\u103a\u1002\u103b\u1004\u103a\u1014\u102e\u101a\u102c \u1014\u1031\u102c\u1000\u103a\u1006\u1000\u103a\u1010\u103d\u1032<\/h3>\n<p>\u1010\u1036\u1006\u102d\u1015\u103a\u1000\u102d\u102f\u1016\u1010\u103a\u1001\u103c\u1004\u103a\u1038\u101e\u100a\u103a \u1015\u1011\u1019\u1021\u1006\u1004\u1037\u103a\u101e\u102c\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b \u1019\u103e\u1014\u103a\u1000\u1014\u103a\u101e\u1031\u102c \u1014\u1031\u102c\u1000\u103a\u1006\u1000\u103a\u1010\u103d\u1032\u1019\u1031\u1038\u1001\u103d\u1014\u103a\u1038\u1019\u103b\u102c\u1038\u1019\u103e\u102c-<\/p>\n<ul>\n<li>\u1021\u1021\u1031\u1038\u1001\u103b\u102d\u1014\u103a\u1001\u103b\u102d\u1014\u103a\u100a\u103e\u102d\u1001\u103c\u1004\u103a\u1038\u1021\u1015\u102b\u1021\u101d\u1004\u103a \u1000\u103b\u103d\u1014\u103a\u102f\u1015\u103a\u104f \u1021\u1019\u103e\u1014\u103a\u1010\u1000\u101a\u103a \u1021\u1019\u103c\u1004\u1037\u103a\u1006\u102f\u1036\u1038\u1005\u1014\u1005\u103a\u1017\u102d\u102f\u1037\u1021\u102c\u1038\u101e\u100a\u103a \u1019\u100a\u103a\u1019\u103b\u103e\u101b\u103e\u102d\u101e\u1014\u100a\u103a\u1038\u104b<\/li>\n<li>\u1000\u103b\u103d\u1014\u103a\u102f\u1015\u103a\u101e\u100a\u103a \u1019\u100a\u103a\u101e\u100a\u1037\u103a conductor \u1005\u102e\u1005\u1009\u103a\u1019\u103e\u102f\u1000\u102d\u102f \u1001\u103b\u102d\u1010\u103a\u1006\u1000\u103a\u1019\u103e\u102f\u1016\u103c\u1010\u103a\u1010\u1031\u102c\u1000\u103a\u1014\u1031\u101e\u1014\u100a\u103a\u1038\u104a \u101d\u1004\u103a\u101b\u102d\u102f\u1038\u1016\u103d\u1032\u1037\u1005\u100a\u103a\u1038\u1015\u102f\u1036\u101e\u100a\u103a \u1000\u102d\u102f\u1000\u103a\u100a\u102e\u1019\u103e\u102f\u101b\u103e\u102d\u1015\u102b\u101e\u101c\u102c\u1038\u104b<\/li>\n<li>\u1021\u1019\u103e\u1014\u103a\u1010\u1000\u101a\u103a\u101d\u1014\u103a\u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1019\u103e\u102c \u1021\u1018\u101a\u103a\u1014\u100a\u103a\u1038- \u1001\u1036\u1014\u102d\u102f\u1004\u103a\u101b\u100a\u103a\u101b\u103e\u102d\u101e\u1031\u102c\u104a inductive \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a PV-specific \u101c\u102c\u1038\u104b<\/li>\n<li>\u1024\u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u101e\u100a\u103a \u1024 switching \u1010\u102c\u101d\u1014\u103a\u1021\u1010\u103d\u1000\u103a \u1021\u1019\u103e\u1014\u103a\u1010\u1000\u101a\u103a \u101e\u1004\u1037\u103a\u101c\u103b\u1031\u102c\u103a\u1015\u102b\u101e\u101c\u102c\u1038\u104b<\/li>\n<\/ul>\n<h2>\u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a \u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u1019\u103e\u102f \u1006\u102f\u1036\u1038\u1016\u103c\u1010\u103a\u1001\u103b\u1000\u103a \u1005\u102e\u1038\u1006\u1004\u103a\u1038\u1019\u103e\u102f<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-decision-flowchart-for-selecting-a-DC-isolator-switch-based-on-voltage-current-poles-and-utilization-category.webp\" alt=\"Technical decision flowchart for selecting a DC isolator switch based on voltage current poles and utilization category\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">\u1017\u102d\u102f\u1037\u1021\u102c\u1038\u104a \u101c\u103b\u103e\u1015\u103a\u1005\u102e\u1038\u1000\u103c\u1031\u102c\u1004\u103a\u1038\u104a \u101d\u1004\u103a\u101b\u102d\u102f\u1038\u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1021\u1015\u1031\u102b\u103a \u1021\u1001\u103c\u1031\u1001\u1036\u104d \u1019\u103e\u1014\u103a\u1000\u1014\u103a\u101e\u1031\u102c DC isolator switch \u1000\u102d\u102f \u1000\u103b\u102d\u102f\u1038\u1000\u103c\u1031\u102c\u1004\u103a\u1038\u1006\u102e\u101c\u103b\u1031\u102c\u103a\u1005\u103d\u102c \u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u101b\u1014\u103a \u1014\u100a\u103a\u1038\u1015\u100a\u102c\u1006\u102d\u102f\u1004\u103a\u101b\u102c \u1006\u102f\u1036\u1038\u1016\u103c\u1010\u103a\u1001\u103b\u1000\u103a \u1005\u102e\u1038\u1006\u1004\u103a\u1038\u1007\u101a\u102c\u1038\u104b.<\/figcaption><\/figure>\n<p>DC isolator \u1000\u102d\u102f \u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u101e\u1031\u102c\u1021\u1001\u102b\u104a \u1016\u103d\u1032\u1037\u1005\u100a\u103a\u1038\u1010\u100a\u103a\u1006\u1031\u102c\u1000\u103a\u1011\u102c\u1038\u101e\u1031\u102c \u1021\u1005\u102e\u1021\u1005\u1025\u103a\u1010\u103d\u1004\u103a \u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1001\u103c\u1004\u103a\u1038\u101e\u100a\u103a \u1021\u1016\u103c\u1005\u103a\u1021\u1019\u103b\u102c\u1038\u1006\u102f\u1036\u1038 \u1021\u102c\u1038\u1014\u100a\u103a\u1038\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u101b\u103e\u1031\u102c\u1004\u103a\u101b\u103e\u102c\u1038\u101b\u1014\u103a \u1000\u1030\u100a\u102e\u1015\u1031\u1038\u101e\u100a\u103a\u104b.<\/p>\n<h3>\u1021\u1006\u1004\u1037\u103a \u1041- \u101e\u1004\u103a\u104f \u1021\u1019\u103c\u1004\u1037\u103a\u1006\u102f\u1036\u1038 DC \u1017\u102d\u102f\u1037\u1021\u102c\u1038\u1000\u102d\u102f \u1006\u102f\u1036\u1038\u1016\u103c\u1010\u103a\u1015\u102b\u104b<\/h3>\n<p>\u1021\u1021\u1031\u1038\u1001\u103b\u102d\u1014\u103a\u1001\u103b\u102d\u1014\u103a\u100a\u103e\u102d\u1001\u103c\u1004\u103a\u1038\u1021\u1015\u102b\u1021\u101d\u1004\u103a \u101e\u1004\u1037\u103a\u1005\u1014\u1005\u103a\u1021\u1010\u103d\u1000\u103a \u1021\u1006\u102d\u102f\u1038\u1006\u102f\u1036\u1038 open-circuit \u1017\u102d\u102f\u1037\u1021\u102c\u1038\u1000\u102d\u102f \u1010\u103d\u1000\u103a\u1001\u103b\u1000\u103a\u1015\u102b\u104b \u1024\u1014\u1036\u1015\u102b\u1010\u103a\u101e\u100a\u103a \u101e\u1004\u103a\u104f \u1021\u1014\u100a\u103a\u1038\u1006\u102f\u1036\u1038\u1017\u102d\u102f\u1037\u1021\u102c\u1038\u101c\u102d\u102f\u1021\u1015\u103a\u1001\u103b\u1000\u103a \u1016\u103c\u1005\u103a\u101c\u102c\u101e\u100a\u103a\u104b.<\/p>\n<h3>\u1021\u1006\u1004\u1037\u103a \u1042- \u1017\u102d\u102f\u1037\u1021\u102c\u1038\u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a (Ue) \u1000\u102d\u102f \u1021\u1010\u100a\u103a\u1015\u103c\u102f\u1015\u102b\u104b<\/h3>\n<p>isolator \u101e\u100a\u103a \u1011\u102d\u102f\u1014\u1036\u1015\u102b\u1010\u103a\u1014\u103e\u1004\u1037\u103a \u1000\u102d\u102f\u1000\u103a\u100a\u102e\u1000\u103c\u1031\u102c\u1004\u103a\u1038 \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1000\u103b\u1031\u102c\u103a\u101c\u103d\u1014\u103a\u1000\u103c\u1031\u102c\u1004\u103a\u1038 \u1005\u1005\u103a\u1006\u1031\u1038\u1015\u102b\u104b \u1019\u1000\u102d\u102f\u1000\u103a\u100a\u102e\u1015\u102b\u1000 \u1021\u1001\u103c\u102c\u1038\u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a\u1000\u102d\u102f \u1019\u1001\u103d\u1032\u1001\u103c\u102c\u1038\u1018\u1032 \u1005\u1000\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038\u101e\u100a\u103a \u1021\u101b\u100a\u103a\u1021\u1001\u103b\u1004\u103a\u1038\u1019\u1015\u103c\u100a\u1037\u103a\u1019\u102e\u1015\u102b\u104b.<\/p>\n<h3>\u1021\u1006\u1004\u1037\u103a \u1043- \u101c\u1000\u103a\u101b\u103e\u102d\u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a (Ie) \u1000\u102d\u102f \u1005\u1005\u103a\u1006\u1031\u1038\u1015\u102b\u104b<\/h3>\n<p>\u1019\u103b\u103e\u1031\u102c\u103a\u101c\u1004\u1037\u103a\u1011\u102c\u1038\u101e\u1031\u102c \u101c\u100a\u103a\u1015\u1010\u103a\u1014\u1031\u101e\u1031\u102c \u101c\u103b\u103e\u1015\u103a\u1005\u102e\u1038\u1000\u103c\u1031\u102c\u1004\u103a\u1038\u104a \u1015\u1010\u103a\u101d\u1014\u103a\u1038\u1000\u103b\u1004\u103a\u1021\u1015\u1030\u1001\u103b\u102d\u1014\u103a\u104a \u1021\u1019\u103c\u1004\u1037\u103a\u104a \u1021\u1000\u102c\u1021\u101b\u1036\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u1011\u102f\u1010\u103a\u101c\u102f\u1015\u103a\u101e\u1030\u1019\u103e \u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1011\u102c\u1038\u101e\u1031\u102c derating \u1021\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u1021\u102c\u1038\u101c\u102f\u1036\u1038\u1000\u102d\u102f \u1005\u1005\u103a\u1006\u1031\u1038\u1015\u102b\u104b.<\/p>\n<h3>\u1021\u1006\u1004\u1037\u103a \u1044- \u101d\u1004\u103a\u101b\u102d\u102f\u1038\u1016\u103d\u1032\u1037\u1005\u100a\u103a\u1038\u1015\u102f\u1036\u1000\u102d\u102f \u1005\u1005\u103a\u1006\u1031\u1038\u1015\u102b\u104b<\/h3>\n<p>\u101d\u1004\u103a\u101b\u102d\u102f\u1038\u1021\u101b\u1031\u1021\u1010\u103d\u1000\u103a\u101e\u100a\u103a \u101e\u1004\u103a\u104f circuit architecture \u1014\u103e\u1004\u1037\u103a \u1011\u102f\u1010\u103a\u101c\u102f\u1015\u103a\u101e\u1030\u104f \u1021\u1000\u103c\u1036\u1015\u103c\u102f\u1011\u102c\u1038\u101e\u1031\u102c \u101d\u102b\u101a\u102c\u1000\u103c\u102d\u102f\u1038\u1015\u102f\u1036\u1014\u103e\u1004\u1037\u103a \u1000\u102d\u102f\u1000\u103a\u100a\u102e\u1000\u103c\u1031\u102c\u1004\u103a\u1038 \u1021\u1010\u100a\u103a\u1015\u103c\u102f\u1015\u102b\u104b.<\/p>\n<h3>\u1021\u1006\u1004\u1037\u103a \u1045- \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1000\u102d\u102f \u1005\u1005\u103a\u1006\u1031\u1038\u1015\u102b\u104b<\/h3>\n<p>PV application \u1019\u103b\u102c\u1038\u1021\u1010\u103d\u1000\u103a DC-PV1 \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a DC-PV2 \u1000\u102d\u102f \u101b\u103e\u102c\u1016\u103d\u1031\u1015\u102b\u104b \u101a\u1031\u1018\u1030\u101a\u103b DC application \u1019\u103b\u102c\u1038\u1021\u1010\u103d\u1000\u103a DC-21B \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a DC-22B \u101e\u100a\u103a \u101d\u1014\u103a\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u1000\u102d\u102f\u1000\u103a\u100a\u102e\u1000\u103c\u1031\u102c\u1004\u103a\u1038 \u1021\u1010\u100a\u103a\u1015\u103c\u102f\u1015\u102b\u104b \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038 \u1015\u103b\u1031\u102c\u1000\u103a\u1006\u102f\u1036\u1038\u1014\u1031\u1015\u102b\u1000 \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1019\u101b\u103e\u1004\u103a\u1038\u101c\u1004\u103a\u1038\u1015\u102b\u1000 \u104e\u1004\u103a\u1038\u1000\u102d\u102f \u1021\u1014\u1039\u1010\u101b\u102c\u101a\u103a\u1021\u1001\u103b\u1000\u103a\u1015\u103c\u1021\u1016\u103c\u1005\u103a \u101e\u1018\u1031\u102c\u1011\u102c\u1038\u1015\u102b\u104b.<\/p>\n<h3>\u1021\u1006\u1004\u1037\u103a \u1046- \u1005\u1036\u1014\u103e\u102f\u1014\u103a\u1038\u1014\u103e\u1004\u1037\u103a \u1021\u101e\u102d\u1021\u1019\u103e\u1010\u103a\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1001\u103c\u1031\u1001\u1036\u1000\u102d\u102f \u1021\u1010\u100a\u103a\u1015\u103c\u102f\u1015\u102b\u104b<\/h3>\n<p>\u1005\u1000\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038\u101e\u100a\u103a \u101b\u100a\u103a\u100a\u103d\u103e\u1014\u103a\u1038\u101e\u1004\u1037\u103a\u101e\u100a\u103a\u104b <strong>IEC 60947-3<\/strong> \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1021\u1001\u103c\u102c\u1038\u101e\u1000\u103a\u1006\u102d\u102f\u1004\u103a\u101b\u102c \u1012\u1031\u101e\u1006\u102d\u102f\u1004\u103a\u101b\u102c \u1005\u1036\u1014\u103e\u102f\u1014\u103a\u1038\u1021\u1001\u103c\u1031\u1001\u1036\u104a \u1025\u1015\u1019\u102c- <strong>UL 98B<\/strong> \u1019\u103c\u1031\u102c\u1000\u103a\u1021\u1019\u1031\u101b\u102d\u1000 photovoltaic \u1021\u1001\u103c\u1031\u1021\u1014\u1031\u1010\u103d\u1004\u103a\u104b.<\/p>\n<p>\u1005\u1000\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038\u101e\u100a\u103a \u1005\u1005\u103a\u1006\u1031\u1038\u1019\u103e\u102f \u1001\u103c\u1031\u102c\u1000\u103a\u1001\u102f\u101c\u102f\u1036\u1038\u1000\u102d\u102f \u1021\u1031\u102c\u1004\u103a\u1019\u103c\u1004\u103a\u1015\u102b\u1000 \u1021\u101e\u1031\u1038\u1005\u102d\u1010\u103a \u1021\u1004\u103a\u1002\u103b\u1004\u103a\u1014\u102e\u101a\u102c\u101e\u102f\u1036\u1038\u101e\u1015\u103a\u1001\u103b\u1000\u103a\u101e\u102d\u102f\u1037 \u101b\u103d\u103e\u1031\u1037\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a\u104b \u1019\u100a\u103a\u101e\u100a\u1037\u103a\u1021\u1006\u1004\u1037\u103a\u1010\u103d\u1004\u103a\u1019\u1006\u102d\u102f \u1000\u103b\u101b\u103e\u102f\u1036\u1038\u1015\u102b\u1000 \u1011\u102f\u1010\u103a\u1000\u102f\u1014\u103a\u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u1019\u103e\u102f\u1021\u1006\u1004\u1037\u103a\u101e\u102d\u102f\u1037 \u1015\u103c\u1014\u103a\u101e\u103d\u102c\u1038\u1015\u102b\u104b.<\/p>\n<h2>\u1021\u1016\u103c\u1005\u103a\u1019\u103b\u102c\u1038\u101e\u1031\u102c \u1016\u1010\u103a\u101b\u103e\u102f\u1001\u103c\u1004\u103a\u1038\u1021\u1019\u103e\u102c\u1038\u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u104e\u1004\u103a\u1038\u1010\u102d\u102f\u1037\u1000\u102d\u102f \u101b\u103e\u1031\u102c\u1004\u103a\u101b\u103e\u102c\u1038\u1014\u100a\u103a\u1038<\/h2>\n<h3>\u1021\u1019\u103e\u102c\u1038 \u1041- \u101c\u1000\u103a\u101b\u103e\u102d\u1000\u102d\u102f \u1026\u1038\u1005\u103d\u102c\u1000\u103c\u100a\u1037\u103a\u1001\u103c\u1004\u103a\u1038<\/h3>\n<p>\u1024\u101e\u100a\u103a\u1019\u103e\u102c \u1021\u1016\u103c\u1005\u103a\u1021\u1019\u103b\u102c\u1038\u1006\u102f\u1036\u1038 \u1005\u102e\u1038\u1015\u103d\u102c\u1038\u1016\u103c\u1005\u103a\u1021\u1019\u103e\u102c\u1038\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b A <code>32 A<\/code> \u1017\u102d\u102f\u1037\u1021\u102c\u1038\u1021\u1010\u1014\u103a\u1038 \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a switching \u1010\u102c\u101d\u1014\u103a\u101e\u100a\u103a \u1021\u1019\u103e\u1014\u103a\u1010\u1000\u101a\u103a\u1005\u1014\u1005\u103a\u1014\u103e\u1004\u1037\u103a \u1019\u1000\u102d\u102f\u1000\u103a\u100a\u102e\u101e\u1031\u102c\u103a\u101c\u100a\u103a\u1038 \u1005\u1000\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038\u1000\u102d\u102f \u1015\u101b\u1031\u102c\u1002\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1021\u1010\u103d\u1000\u103a \u1021\u1010\u100a\u103a\u1015\u103c\u102f\u1015\u1031\u1038\u101e\u100a\u103a\u104b.<\/p>\n<p><strong>\u101b\u103e\u1031\u102c\u1004\u103a\u101b\u103e\u102c\u1038\u1014\u100a\u103a\u1038:<\/strong> \u1017\u102d\u102f\u1037\u1021\u102c\u1038\u1016\u103c\u1004\u1037\u103a \u1021\u1019\u103c\u1032\u1005\u1010\u1004\u103a\u1015\u102b\u104b \u101c\u1000\u103a\u101b\u103e\u102d\u101e\u100a\u103a \u1021\u101b\u1031\u1038\u1000\u103c\u102e\u1038\u101e\u1031\u102c\u103a\u101c\u100a\u103a\u1038 \u1017\u102d\u102f\u1037\u1021\u102c\u1038\u101e\u1004\u1037\u103a\u101c\u103b\u1031\u102c\u103a\u1019\u103e\u102f\u1000\u102d\u102f \u1021\u1010\u100a\u103a\u1015\u103c\u102f\u1015\u103c\u102e\u1038\u1019\u103e\u101e\u102c \u1021\u101b\u1031\u1038\u1000\u103c\u102e\u1038\u1015\u102b\u101e\u100a\u103a\u104b.<\/p>\n<h3>\u1021\u1019\u103e\u102c\u1038 \u1042- \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1000\u102d\u102f \u101c\u103b\u1005\u103a\u101c\u103b\u1030\u101b\u103e\u102f\u1001\u103c\u1004\u103a\u1038<\/h3>\n<p>\u1019\u103e\u1014\u103a\u1000\u1014\u103a\u101e\u1031\u102c \u101c\u103b\u103e\u1015\u103a\u1005\u102e\u1038\u1000\u103c\u1031\u102c\u1004\u103a\u1038\u1014\u103e\u1004\u1037\u103a \u1017\u102d\u102f\u1037\u1021\u102c\u1038\u101b\u103e\u102d\u101e\u1031\u102c switch \u101e\u100a\u103a \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u101e\u100a\u103a \u1021\u1019\u103e\u1014\u103a\u1010\u1000\u101a\u103a DC \u1010\u102c\u101d\u1014\u103a\u1014\u103e\u1004\u1037\u103a \u1019\u1000\u102d\u102f\u1000\u103a\u100a\u102e\u1015\u102b\u1000 \u1019\u101e\u1004\u1037\u103a\u101c\u103b\u1031\u102c\u103a\u1014\u102d\u102f\u1004\u103a\u101e\u1031\u1038\u1015\u102b\u104b.<\/p>\n<p><strong>\u101b\u103e\u1031\u102c\u1004\u103a\u101b\u103e\u102c\u1038\u1014\u100a\u103a\u1038:<\/strong> \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1000\u102d\u102f \u1019\u1016\u103c\u1005\u103a\u1019\u1014\u1031\u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u101b\u1019\u100a\u1037\u103a \u1005\u1036\u1014\u103e\u102f\u1014\u103a\u1038\u1021\u1016\u103c\u1005\u103a \u101e\u1018\u1031\u102c\u1011\u102c\u1038\u1015\u102b\u104a \u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u1014\u102d\u102f\u1004\u103a\u101e\u1031\u102c \u1012\u1031\u1010\u102c\u1021\u1019\u103e\u1010\u103a\u1021\u1016\u103c\u1005\u103a \u1019\u101e\u1018\u1031\u102c\u1011\u102c\u1038\u1015\u102b\u1014\u103e\u1004\u1037\u103a\u104b.<\/p>\n<h3>\u1021\u1019\u103e\u102c\u1038 \u1043- \u101d\u1004\u103a\u101b\u102d\u102f\u1038\u1019\u103b\u102c\u1038\u1019\u103b\u102c\u1038\u101c\u1031 \u1000\u1031\u102c\u1004\u103a\u1038\u101c\u1031\u101f\u102f \u101a\u1030\u1006\u1001\u103c\u1004\u103a\u1038<\/h3>\n<p>\u101d\u1004\u103a\u101b\u102d\u102f\u1038\u1019\u103b\u102c\u1038\u1019\u103b\u102c\u1038\u101c\u1031 \u1015\u102d\u102f\u1019\u102d\u102f\u101c\u102f\u1036\u1001\u103c\u102f\u1036\u101e\u1031\u102c \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1005\u103d\u1019\u103a\u1038\u1006\u1031\u102c\u1004\u103a\u1014\u102d\u102f\u1004\u103a\u101e\u1031\u102c switch \u1000\u102d\u102f \u1021\u101c\u102d\u102f\u1021\u101c\u103b\u1031\u102c\u1000\u103a \u1006\u102d\u102f\u101c\u102d\u102f\u1001\u103c\u1004\u103a\u1038\u1019\u101f\u102f\u1010\u103a\u1015\u102b\u104b \u104e\u1004\u103a\u1038\u1010\u102d\u102f\u1037\u101e\u100a\u103a \u101e\u102e\u1038\u1001\u103c\u102c\u1038\u1021\u1010\u103d\u1004\u103a\u1038\u1015\u102d\u102f\u1004\u103a\u1038\u1014\u103e\u1004\u1037\u103a \u1015\u103c\u1004\u103a\u1015 conductor \u1021\u1014\u103e\u1031\u102c\u1000\u103a\u1021\u101a\u103e\u1000\u103a\u1015\u1031\u1038\u101e\u100a\u1037\u103a \u1005\u102e\u1005\u1009\u103a\u1019\u103e\u102f\u1000\u102d\u102f \u100a\u103d\u103e\u1014\u103a\u1015\u103c\u101e\u100a\u103a\u104b.<\/p>\n<p><strong>\u101b\u103e\u1031\u102c\u1004\u103a\u101b\u103e\u102c\u1038\u1014\u100a\u103a\u1038:<\/strong> \u1011\u102f\u1010\u103a\u101c\u102f\u1015\u103a\u101e\u1030\u104f \u1001\u103b\u102d\u1010\u103a\u1006\u1000\u103a\u1019\u103e\u102f\u1015\u102f\u1036\u1000\u102d\u102f \u1021\u1019\u103c\u1032\u101b\u100a\u103a\u100a\u103d\u103e\u1014\u103a\u1038\u1015\u103c\u102e\u1038 \u101e\u1004\u1037\u103a\u101e\u102e\u1038\u1001\u103c\u102c\u1038 circuit layout \u1021\u1010\u103d\u1000\u103a \u101d\u1004\u103a\u101b\u102d\u102f\u1038\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1019\u100a\u103a\u101e\u102d\u102f\u1037\u101d\u102b\u101a\u102c\u1000\u103c\u102d\u102f\u1038\u1010\u1015\u103a\u1006\u1004\u103a\u101e\u1004\u1037\u103a\u1000\u103c\u1031\u102c\u1004\u103a\u1038 \u1021\u1010\u100a\u103a\u1015\u103c\u102f\u1015\u102b\u104b.<\/p>\n<h3>\u1021\u1019\u103e\u102c\u1038 \u1044- AC \u1014\u103e\u1004\u1037\u103a\u1010\u1030\u101e\u1031\u102c \u1021\u1019\u103e\u1010\u103a\u1021\u101e\u102c\u1038\u1019\u103b\u102c\u1038\u1000\u102d\u102f DC \u1021\u1010\u103d\u1000\u103a \u101c\u1000\u103a\u1001\u1036\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a\u101f\u102f \u101e\u1018\u1031\u102c\u1011\u102c\u1038\u1001\u103c\u1004\u103a\u1038<\/h3>\n<p>\u1021\u1001\u103b\u102d\u102f\u1037\u101e\u1031\u102c\u1011\u102f\u1010\u103a\u1000\u102f\u1014\u103a\u1019\u103b\u102c\u1038\u101e\u100a\u103a \u101a\u1031\u1018\u1030\u101a\u103b\u1015\u102f\u1036\u1015\u1031\u102b\u1000\u103a\u101e\u1031\u102c \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a AC application \u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u1021\u1013\u102d\u1000\u1006\u1000\u103a\u1005\u1015\u103a\u1014\u1031\u101e\u1031\u102c \u1021\u1019\u103e\u1010\u103a\u1021\u101e\u102c\u1038\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u101e\u101a\u103a\u1006\u1031\u102c\u1004\u103a\u101e\u100a\u103a\u104b \u1005\u1000\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038\u1000\u102d\u102f DC switching \u1010\u102c\u101d\u1014\u103a\u1021\u1010\u103d\u1000\u103a \u101b\u103e\u1004\u103a\u1038\u101b\u103e\u1004\u103a\u1038\u101c\u1004\u103a\u1038\u101c\u1004\u103a\u1038 \u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1015\u103c\u102e\u1038 \u1001\u103d\u1032\u1001\u103c\u102c\u1038\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1019\u1011\u102c\u1038\u1015\u102b\u1000 \u101e\u1010\u102d\u1011\u102c\u1038\u1015\u102b\u104b.<\/p>\n<p><strong>\u101b\u103e\u1031\u102c\u1004\u103a\u101b\u103e\u102c\u1038\u1014\u100a\u103a\u1038:<\/strong> \u101b\u103e\u1004\u103a\u1038\u101c\u1004\u103a\u1038\u101e\u1031\u102c DC \u1017\u102d\u102f\u1037\u1021\u102c\u1038\u1021\u1019\u103e\u1010\u103a\u1021\u101e\u102c\u1038\u1019\u103b\u102c\u1038\u104a DC \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1019\u103e\u102f\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u101b\u100a\u103a\u100a\u103d\u103e\u1014\u103a\u1038\u1001\u103b\u1000\u103a\u1000\u102d\u102f \u101b\u103e\u102c\u1016\u103d\u1031\u1015\u102b\u104b <strong>IEC 60947-3<\/strong> \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1021\u1001\u103c\u102c\u1038\u101e\u1000\u103a\u1006\u102d\u102f\u1004\u103a\u101b\u102c DC-\u101e\u1000\u103a\u1006\u102d\u102f\u1004\u103a\u101b\u102c \u1005\u1036\u1014\u103e\u102f\u1014\u103a\u1038\u1021\u1001\u103c\u1031\u1001\u1036\u104b.<\/p>\n<h2>\u1021\u1019\u103c\u1032\u1019\u1031\u1038\u101c\u1031\u1037\u101b\u103e\u102d\u101e\u1031\u102c\u1019\u1031\u1038\u1001\u103d\u1014\u103a\u1038\u1019\u103b\u102c\u1038<\/h2>\n<h3>What is the first rating I should check on a DC isolator switch?<\/h3>\n<p>Start with the voltage rating, because a switch that is under-rated for DC voltage is immediately disqualified regardless of its current rating. In PV applications, check against the cold-corrected maximum Voc, not just the nominal system voltage.<\/p>\n<h3>What does 4P mean on a DC isolator switch?<\/h3>\n<p>It means the switch uses four poles to disconnect the circuit. In DC applications, this often affects how the conductors are routed and what voltage arrangement the switch can support.<\/p>\n<h3>What does DC-21B mean?<\/h3>\n<p>It is an IEC utilization category indicating the switching duty for which the device was tested. DC-21B corresponds to resistive or slightly inductive DC loads.<\/p>\n<h3>What do DC-PV1 and DC-PV2 mean on a solar isolator switch?<\/h3>\n<p>They are photovoltaic-specific utilization categories used in the IEC 60947-3 framework. DC-PV1 covers standard PV switching duty, while DC-PV2 covers more demanding PV conditions, including reverse-current scenarios.<\/p>\n<h3>Is current rating more important than utilization category?<\/h3>\n<p>No. Current rating tells you how much load the switch can carry. Utilization category tells you what kind of load and switching conditions the switch was designed to handle.<\/p>\n<h3>Can I choose a DC isolator by amperes only?<\/h3>\n<p>No. A correct selection also depends on maximum DC voltage, pole configuration, utilization category, and the specific application conditions.<\/p>\n<h2>\u1014\u1031\u102c\u1000\u103a\u1018\u102c\u101c\u102f\u1015\u103a\u101b\u1019\u101c\u1032<\/h2>\n<p>\u101a\u1001\u102f \u101e\u1004\u103a\u101e\u100a\u103a \u1021\u1006\u1004\u1037\u103a\u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1019\u100a\u103a\u101e\u102d\u102f\u1037\u1016\u1010\u103a\u101b\u1019\u100a\u103a\u1000\u102d\u102f \u1014\u102c\u1038\u101c\u100a\u103a\u1015\u103c\u102e\u1016\u103c\u1005\u103a\u101e\u1031\u102c\u1000\u103c\u1031\u102c\u1004\u1037\u103a \u1014\u1031\u102c\u1000\u103a\u1010\u1005\u103a\u1006\u1004\u1037\u103a\u1019\u103e\u102c \u104e\u1004\u103a\u1038\u1010\u102d\u102f\u1037\u1000\u102d\u102f \u101e\u1004\u103a\u104f\u1021\u1019\u103e\u1014\u103a\u1010\u1000\u101a\u103a\u1015\u101b\u1031\u102c\u1002\u103b\u1000\u103a\u1010\u103d\u1004\u103a \u1021\u101e\u102f\u1036\u1038\u1001\u103b\u101b\u1014\u103a\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b.<\/p>\n<ul>\n<li>\u101e\u102e\u1038\u1001\u103c\u102c\u1038\u1015\u101b\u1031\u102c\u1002\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1021\u1010\u103d\u1000\u103a isolator \u1000\u102d\u102f \u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u1014\u1031\u1015\u102b\u1000 \u101e\u1004\u103a\u104f\u1021\u1019\u103e\u1014\u103a\u1010\u1000\u101a\u103a\u1005\u1014\u1005\u103a parameters \u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u1014\u103e\u102d\u102f\u1004\u103a\u1038\u101a\u103e\u1009\u103a\u104d \u1000\u102d\u102f\u101a\u103a\u1005\u102c\u1038\u101c\u103e\u101a\u103a\u101c\u1031\u102c\u1004\u103a\u1038\u1010\u1005\u103a\u1001\u102f\u1005\u102e\u1000\u102d\u102f \u1021\u1010\u100a\u103a\u1015\u103c\u102f\u101b\u1014\u103a \u1021\u1011\u1000\u103a\u1015\u102b \u1001\u103c\u1031\u102c\u1000\u103a\u1006\u1004\u1037\u103a \u1006\u102f\u1036\u1038\u1016\u103c\u1010\u103a\u1001\u103b\u1000\u103a \u1005\u102e\u1038\u1006\u1004\u103a\u1038\u1019\u103e\u102f\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1015\u102b\u104b.<\/li>\n<li>\u101d\u102b\u101a\u102c\u1000\u103c\u102d\u102f\u1038\u1018\u1000\u103a\u1010\u103d\u1004\u103a \u1021\u1000\u1030\u1021\u100a\u102e\u101c\u102d\u102f\u1021\u1015\u103a\u1015\u102b\u1000 \u1006\u1000\u103a\u101c\u1000\u103a\u101c\u102f\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1015\u102b\u104b <a href=\"https:\/\/test.viox.com\/my\/connection-of-dc-isolators\/\">\u1012\u102e\u1005\u102e \u1021\u102d\u102f\u1004\u103a\u1006\u102d\u102f\u101c\u1031\u1010\u102c\u1019\u103b\u102c\u1038 \u1001\u103b\u102d\u1010\u103a\u1006\u1000\u103a\u1001\u103c\u1004\u103a\u1038 (Connection of DC Isolators)<\/a> \u101d\u1004\u103a\u101b\u102d\u102f\u1038\u1010\u1005\u103a\u1001\u102f\u1001\u103b\u1004\u103a\u1038\u1005\u102e\u1021\u1010\u103d\u1000\u103a \u101d\u102b\u101a\u102c\u1000\u103c\u102d\u102f\u1038\u101c\u1019\u103a\u1038\u100a\u103d\u103e\u1014\u103a\u1019\u103e\u102f\u1021\u1010\u103d\u1000\u103a\u104b.<\/li>\n<li>If you want to review VIOX DC isolator specifications, visit the <a href=\"https:\/\/test.viox.com\/my\/dc-isolator-switch\/\">DC Isolator Switch product page<\/a> to compare voltage, current, pole, and utilization category data.<\/li>\n<li>If you need the broader fundamentals, go back to <a href=\"https:\/\/test.viox.com\/my\/what-is-a-dc-isolator-switch\/\">DC Isolator Switch \u1006\u102d\u102f\u1010\u102c\u1018\u102c\u101c\u1032\u104b<\/a>.<\/li>\n<\/ul>\n<h2>Sources Used<\/h2>\n<ul>\n<li><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/59785\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60947-3:2020 overview<\/a><\/li>\n<li><a href=\"https:\/\/www.shopulstandards.com\/ProductDetail.aspx?UniqueKey=30658\" rel=\"nofollow noopener\" target=\"_blank\">UL 98B standard family reference<\/a><\/li>\n<li><a href=\"https:\/\/electrification.us.abb.com\/products\/switches-disconnects\/otdc-disconnects\" rel=\"nofollow noopener\" target=\"_blank\">ABB OTDC disconnects reference showing DC-PV2 ratings<\/a><\/li>\n<li><a href=\"https:\/\/www.socomec.be\/fr\/securiser-le-sectionnement-des-panneaux-photovoltaiques\" rel=\"nofollow noopener\" target=\"_blank\">Socomec photovoltaic disconnector guidance discussing DC-PV2<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 235.828px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 235.828px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Direct Answer Reading a DC isolator switch label correctly comes down to four things, checked in this order: Voltage rating \u2014 can the switch safely handle the highest DC voltage in your system? Current rating \u2014 can it carry the expected continuous current without overheating? Pole configuration \u2014 how many conductors does it disconnect at [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":23389,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-23388","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/posts\/23388","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/comments?post=23388"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/posts\/23388\/revisions"}],"predecessor-version":[{"id":23390,"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/posts\/23388\/revisions\/23390"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/media\/23389"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/media?parent=23388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/categories?post=23388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/tags?post=23388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}