{"id":21292,"date":"2026-01-16T11:27:48","date_gmt":"2026-01-16T03:27:48","guid":{"rendered":"https:\/\/viox.com\/?p=21292"},"modified":"2026-01-16T11:27:50","modified_gmt":"2026-01-16T03:27:50","slug":"ev-charger-rcd-selection-type-b-vs-type-f-vs-type-ev-iec-62955-iec-62423","status":"publish","type":"post","link":"https:\/\/test.viox.com\/my\/ev-charger-rcd-selection-type-b-vs-type-f-vs-type-ev-iec-62955-iec-62423\/","title":{"rendered":"EV Charger RCD Selection: Type B vs. Type F vs. Type EV (IEC 62955 &amp; IEC 62423)"},"content":{"rendered":"<div class=\"product-intro\">\n<p>For electrical engineers and installers, the rapid expansion of Electric Vehicle (EV) infrastructure presents a specific protection challenge: <strong>DC fault currents<\/strong>. Unlike standard household loads, the rectification circuits within EV On-Board Chargers (OBC) can generate smooth DC leakage currents in the event of a fault.<\/p>\n<p>If not properly isolated, these DC currents can blind upstream Type A Residual Current Devices (RCDs), rendering the entire electrical installation unsafe.<\/p>\n<p>This engineering guide analyzes the three compliant protection strategies defined by <strong>IEC 60364-7-722<\/strong> \u1014\u103e\u1004\u1037\u103a <strong>IEC 61851-1<\/strong>: using a Type B RCD, a Type F RCD (with specific conditions), or the newer \u201cType EV\u201d (RDC-DD) approach. We will examine the technical distinctions between <strong>IEC 62423<\/strong> \u1014\u103e\u1004\u1037\u103a <strong>IEC 62955<\/strong> to determine the optimal selection for safety, compliance, and cost-efficiency.<\/p>\n<h2>The \u201cBlinding\u201d Effect: Why Type A is Insufficient<\/h2>\n<p>The fundamental issue in EV protection is the magnetic saturation of the sensing core in standard RCDs. A standard <strong>Type A RCD<\/strong> (commonly used in residential and commercial circuits) uses a toroidal transformer optimized for 50\/60Hz AC and pulsating DC.<\/p>\n<p>\u1018\u101a\u103a\u1010\u1031\u102c\u1037\u101c\u1032 <strong>smooth DC current<\/strong> (DC current with less than 10% ripple) flows through this toroid, it creates a constant magnetic flux. If this DC leakage exceeds <strong>6mA<\/strong>, it can shift the operating point of the magnetic core into saturation. Once saturated, the core cannot detect the alternating magnetic field generated by a life-threatening AC earth fault. The RCD becomes \u201cblind\u201d and will not trip, leaving users unprotected against electric shock.<\/p>\n<p>Therefore, international standards mandate that any EV charging point must be protected by a device that disconnects the supply in case of DC fault current \u2265 6mA.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto;\" src=\"https:\/\/img.viox.com\/Type-B-RCD-Product-Shot.webp\" alt=\"VIOX Type B Circuit Breaker (RCCB) IEC 62423 for EV protection\" \/><figcaption style=\"font-style: italic; text-align: center; color: #555; margin-top: 8px;\">VIOX Type B RCD (IEC 62423) designed to detect AC, pulsating DC, and smooth DC residual currents.<\/figcaption><\/figure>\n<h2>Defining the Contenders: Type B vs. Type F vs. Type EV<\/h2>\n<h3>1. Type B RCD (IEC 62423)<\/h3>\n<p>\u101f\u102d <strong>Type B RCD<\/strong> is the most robust solution. It contains two detection systems: a standard fluxgate for AC\/pulsating DC and a separate high-frequency electronic detection circuit for smooth DC.<\/p>\n<ul>\n<li><strong>Capabilities:<\/strong> Detects sinusoidal AC, pulsating DC, and <strong>smooth DC<\/strong> residual currents. Also detects currents at frequencies up to 1000Hz (critical for detecting switching frequency leakage from inverters).<\/li>\n<li><strong>Tripping Threshold:<\/strong> \u1015\u102f\u1036\u1019\u103e\u1014\u103a\u1021\u102c\u1038\u1016\u103c\u1004\u1037\u103a <strong>30mA AC<\/strong> \u1014\u103e\u1004\u1037\u103a <strong>60mA DC<\/strong>. (Note: While the standard allows up to 2x I\u0394n for DC, VIOX Type B breakers often trip earlier for enhanced safety).<\/li>\n<li><strong>\u101c\u103b\u103e\u1031\u102c\u1000\u103a\u101c\u103d\u103e\u102c<\/strong> Required for three-phase chargers where DC leakage can be smooth, and for installations requiring maximum uptime and selectivity.<\/li>\n<\/ul>\n<h3>2. Type F RCD (IEC 62423)<\/h3>\n<p>\u101f\u102d <strong>Type F RCD<\/strong> is an enhanced Type A. It offers better immunity to nuisance tripping from surge currents and can detect residual currents with mixed frequencies (up to 1kHz).<\/p>\n<ul>\n<li><strong>Limitation:<\/strong> Crucially, <strong>Type F does not detect smooth DC<\/strong>.<\/li>\n<li><strong>EV Application:<\/strong> \u60a8 <strong>\u1019<\/strong> use a Type F RCD alone for EV charging. It must be paired with an <strong>RDC-DD<\/strong> (Residual Direct Current Detecting Device) that handles the 6mA DC detection.<\/li>\n<\/ul>\n<h3>3. Type EV \/ RDC-DD (IEC 62955)<\/h3>\n<p>Often marketed as \u201cType EV,\u201d this is technically a <strong>Residual Direct Current Detecting Device (RDC-DD)<\/strong>. It is specifically designed to prevent Type A upstream RCDs from being blinded.<\/p>\n<ul>\n<li><strong>\u1021\u101c\u102f\u1015\u1039\u1021\u1019\u103a\u102d\u1033\u1038\u1021\u1005\u102c\u1038:<\/strong> It monitors the circuit for smooth DC leakage.<\/li>\n<li><strong>Threshold:<\/strong> \u1012\u102b\u101f\u102c <strong>must trip at 6mA DC<\/strong>.<\/li>\n<li><strong>\u1005\u1036\u1014\u103e\u102f\u1014\u103a\u1038\u1019\u103b\u102c\u1038-<\/strong> Governed by <strong>IEC 62955<\/strong>.<\/li>\n<li><strong>Variants:<\/strong>\n<ul>\n<li><strong>RDC-MD (Monitoring Device):<\/strong> Detects leakage and signals the EV charger\u2019s contactor to open. If the contactor contacts weld, protection fails.<\/li>\n<li><strong>RDC-PD (Protective Device):<\/strong> Includes its own disconnection mechanism (similar to a circuit breaker).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>For a deeper understanding of how these devices fit into broader commercial systems, refer to our guide on <a href=\"https:\/\/test.viox.com\/my\/commercial-ev-charging-protection-guide-acb-mccb-rcbo\/\">Commercial EV Charging Protection<\/a>.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto;\" src=\"https:\/\/img.viox.com\/Technical-Diagram---DC-Blinding-Effect.webp\" alt=\"Technical schematic diagram illustrating the Blinding Effect in a transformer core\" \/><figcaption style=\"font-style: italic; text-align: center; color: #555; margin-top: 8px;\">Technical Schematic: How DC Bias Flux (&gt;6mA) shifts the magnetic core into saturation, causing the \u201cBlinding Effect\u201d.<\/figcaption><\/figure>\n<h2>Technical Comparison Matrix<\/h2>\n<p>The following table summarizes the detection capabilities and standard compliance for each device type.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\" border=\"1\">\n<thead style=\"background-color: #f2f2f2;\">\n<tr>\n<th style=\"padding: 10px;\">\u1021\u1004\u103a\u1039\u1002\u102b<\/th>\n<th style=\"padding: 10px;\">Type A RCD<\/th>\n<th style=\"padding: 10px;\">Type F RCD<\/th>\n<th style=\"padding: 10px;\">Type B RCD<\/th>\n<th style=\"padding: 10px;\">RDC-DD (Type EV)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px;\"><strong>\u1005\u1036<\/strong><\/td>\n<td style=\"padding: 10px;\">IEC 61008 \/ 61009<\/td>\n<td style=\"padding: 10px;\">IEC 62423<\/td>\n<td style=\"padding: 10px;\"><strong>IEC 62423<\/strong><\/td>\n<td style=\"padding: 10px;\"><strong>IEC 62955<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>AC Residual Current<\/strong><\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">(Dependent on integrated Type A)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Pulsating DC<\/strong><\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">(Dependent on integrated Type A)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Mixed Frequencies (1kHz)<\/strong><\/td>\n<td style=\"padding: 10px;\">\u274c<\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">\u274c<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>\u1001\u103b\u1031\u102c\u1019\u103d\u1031\u1037\u101e\u1031\u102c DC \u1011\u1031\u102c\u1000\u103a\u101c\u103e\u1019\u103a\u1038\u1001\u103c\u1004\u103a\u1038<\/strong><\/td>\n<td style=\"padding: 10px;\">\u274c<\/td>\n<td style=\"padding: 10px;\">\u274c<\/td>\n<td style=\"padding: 10px;\"><strong>\u2705 (Yes)<\/strong><\/td>\n<td style=\"padding: 10px;\"><strong>\u2705 (Yes)<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>DC Trip Threshold<\/strong><\/td>\n<td style=\"padding: 10px;\">\u1019\u101b\u103e\u102d<\/td>\n<td style=\"padding: 10px;\">\u1019\u101b\u103e\u102d<\/td>\n<td style=\"padding: 10px;\"><strong>\u2264 60mA*<\/strong><\/td>\n<td style=\"padding: 10px;\"><strong>6mA<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>\u1019\u103b\u1000\u103a\u1005\u102d\u1000\u103d\u101a\u103a\u1001\u103c\u1004\u103a\u1038\u1000\u102d\u102f \u1000\u102c\u1000\u103d\u101a\u103a\u1015\u1031\u1038\u1015\u102b\u101e\u101c\u102c\u1038\u104b<\/strong><\/td>\n<td style=\"padding: 10px;\">\u1021\u1019\u103d\u1010\u1039<\/td>\n<td style=\"padding: 10px;\">\u1021\u1019\u103d\u1010\u1039<\/td>\n<td style=\"padding: 10px;\"><strong>\u101f\u102f\u1010\u103a\u1000\u1032\u1037 (\u1001\u102f\u1001\u1036\u1014\u102d\u102f\u1004\u103a\u1005\u103d\u1019\u103a\u1038\u101b\u103e\u102d\u101e\u100a\u103a)<\/strong><\/td>\n<td style=\"padding: 10px;\"><strong>\u101f\u102f\u1010\u103a\u1000\u1032\u1037 (\u1016\u103c\u1010\u103a\u1010\u1031\u102c\u1000\u103a\u1001\u103c\u1004\u103a\u1038\u1016\u103c\u1004\u1037\u103a)<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>\u1000\u102f\u1014\u103a\u1000\u103b\u1005\u101b\u102d\u1010\u103a<\/strong><\/td>\n<td style=\"padding: 10px;\">\u1021\u1014\u102d\u1019\u1037\u103a<\/td>\n<td style=\"padding: 10px;\">\u101c\u1010\u103a<\/td>\n<td style=\"padding: 10px;\">\u1019\u103c\u1004\u1037\u103a<\/td>\n<td style=\"padding: 10px;\">\u1021\u101c\u101a\u103a\u1021\u101c\u1010\u103a (\u1015\u1031\u102b\u1004\u103a\u1038\u1005\u1015\u103a\u1011\u102c\u1038\u101e\u100a\u103a)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><em>*IEC 62423 \u101e\u100a\u103a DC \u1016\u103c\u1010\u103a\u1010\u1031\u102c\u1000\u103a\u1019\u103e\u102f\u101e\u100a\u103a AC \u1000\u103b\u1014\u103a\u101b\u103e\u102d\u101e\u1031\u102c \u101c\u103b\u103e\u1015\u103a\u1005\u102e\u1038\u1000\u103c\u1031\u102c\u1004\u103a\u1038 (I\u0394n) \u104f \u1021\u1006 \u1042 \u1006\u1021\u1011\u102d \u1001\u103d\u1004\u1037\u103a\u1015\u103c\u102f\u1011\u102c\u1038\u101e\u100a\u103a\u104b 30mA \u1005\u1000\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038\u1021\u1010\u103d\u1000\u103a 60mA DC \u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b \u101e\u102d\u102f\u1037\u101e\u1031\u102c\u103a \u1005\u1000\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038\u1000\u102d\u102f\u101a\u103a\u1010\u102d\u102f\u1004\u103a\u1000 \u1019\u103b\u1000\u103a\u1005\u102d\u1000\u103d\u101a\u103a\u1001\u103c\u1004\u103a\u1038\u1019\u101b\u103e\u102d\u1018\u1032 \u1024 DC \u1021\u1006\u1004\u1037\u103a\u1000\u102d\u102f \u1001\u1036\u1014\u102d\u102f\u1004\u103a\u101b\u100a\u103a\u101b\u103e\u102d\u1021\u1031\u102c\u1004\u103a \u1012\u102e\u1007\u102d\u102f\u1004\u103a\u1038\u1011\u102f\u1010\u103a\u1011\u102c\u1038\u101e\u100a\u103a\u104b.<\/em><\/p>\n<h2>IEC 62955 \u1014\u103e\u1004\u1037\u103a IEC 62423- \u1019\u100a\u103a\u101e\u100a\u1037\u103a\u1005\u1036\u1014\u103e\u102f\u1014\u103a\u1038\u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u101e\u1004\u1037\u103a\u101e\u1014\u100a\u103a\u1038\u104b<\/h2>\n<p>IEC 62423 \u1014\u103e\u1004\u1037\u103a \u1000\u102d\u102f\u1000\u103a\u100a\u102e\u101e\u1031\u102c \u1005\u1000\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038 (Type B) \u1014\u103e\u1004\u1037\u103a IEC 62955 \u1005\u1000\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038 (RDC-DD) \u1021\u1000\u103c\u102c\u1038 \u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u1019\u103e\u102f\u101e\u100a\u103a \u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u1005\u1000\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038\u1014\u103e\u1004\u1037\u103a \u1010\u1015\u103a\u1006\u1004\u103a\u101e\u100a\u1037\u103a \u1015\u1010\u103a\u101d\u1014\u103a\u1038\u1000\u103b\u1004\u103a\u1015\u1031\u102b\u103a\u1010\u103d\u1004\u103a \u1019\u1030\u1010\u100a\u103a\u1015\u102b\u101e\u100a\u103a\u104b.<\/p>\n<h3>\u1021\u1001\u103c\u1031\u1021\u1014\u1031 \u1041- \u201c\u1015\u1031\u102b\u1004\u103a\u1038\u1005\u1015\u103a\u1011\u102c\u1038\u101e\u1031\u102c\u201d \u1014\u100a\u103a\u1038\u101c\u1019\u103a\u1038 (IEC 62955)<\/h3>\n<p>\u1001\u1031\u1010\u103a\u1019\u102e AC wallbox \u1021\u1019\u103b\u102c\u1038\u1021\u1015\u103c\u102c\u1038 (7kW \u2013 <a href=\"https:\/\/test.viox.com\/my\/ev-charger-circuit-breaker-sizing-guide-7kw-22kw\/\">22kW \u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u1005\u1000\u103a\u1019\u103b\u102c\u1038<\/a>) \u1010\u103d\u1004\u103a 6mA DC \u101b\u103e\u102c\u1016\u103d\u1031\u1001\u103c\u1004\u103a\u1038\u1000\u102d\u102f \u1011\u100a\u1037\u103a\u101e\u103d\u1004\u103a\u1038\u1011\u102c\u1038\u101e\u100a\u103a\u104b \u104e\u1004\u103a\u1038\u101e\u100a\u103a <strong>RDC-DD<\/strong> IEC 62955 \u1014\u103e\u1004\u1037\u103a \u1000\u102d\u102f\u1000\u103a\u100a\u102e\u101e\u100a\u103a\u104b.<\/p>\n<ul>\n<li><strong>\u101c\u102d\u102f\u1021\u1015\u103a\u1001\u103b\u1000\u103a-<\/strong> \u101e\u1004\u103a\u101e\u100a\u103a <strong>Type A RCD<\/strong> AC \u1001\u103b\u102d\u102f\u1037\u101a\u103d\u1004\u103a\u1038\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1000\u102d\u102f\u1004\u103a\u1010\u103d\u101a\u103a\u101b\u1014\u103a\u1021\u1010\u103d\u1000\u103a \u1016\u103c\u1014\u1037\u103a\u1016\u103c\u1030\u1038\u101b\u1031\u1038\u1018\u102f\u1010\u103a\u1010\u103d\u1004\u103a upstream \u1000\u102d\u102f \u1010\u1015\u103a\u1006\u1004\u103a\u101b\u1015\u102b\u1019\u100a\u103a\u104b.<\/li>\n<li><strong>\u1021\u1000\u1031\u102c\u1004\u103a\u1038\u1021\u1006\u102d\u102f\u1038:<\/strong> panel \u1010\u103d\u1004\u103a \u1021\u1005\u102d\u1010\u103a\u1021\u1015\u102d\u102f\u1004\u103a\u1038\u1000\u102f\u1014\u103a\u1000\u103b\u1005\u101b\u102d\u1010\u103a \u101e\u1000\u103a\u101e\u102c\u101e\u100a\u103a\u104b.<\/li>\n<li><strong>\u1004\u1038\u1039\u1021:<\/strong> \u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u1005\u1000\u103a\u104f \u1021\u1010\u103d\u1004\u103a\u1038\u1015\u102d\u102f\u1004\u103a\u1038\u101b\u103e\u102c\u1016\u103d\u1031\u1010\u103d\u1031\u1037\u101b\u103e\u102d\u1019\u103e\u102f \u1015\u103b\u1000\u103a\u1000\u103d\u1000\u103a\u1015\u102b\u1000 Type A RCD upstream \u101e\u100a\u103a \u1019\u103b\u1000\u103a\u1005\u102d\u1000\u103d\u101a\u103a\u1014\u102d\u102f\u1004\u103a\u1001\u103c\u1031\u101b\u103e\u102d\u101e\u100a\u103a\u104b \u1015\u103c\u102f\u1015\u103c\u1004\u103a\u1011\u102d\u1014\u103a\u1038\u101e\u102d\u1019\u103a\u1038\u1019\u103e\u102f\u1010\u103d\u1004\u103a DIN-rail \u1021\u1005\u102d\u1010\u103a\u1021\u1015\u102d\u102f\u1004\u103a\u1038\u1021\u1005\u102c\u1038 \u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u1005\u1000\u103a PCB \u1010\u1005\u103a\u1001\u102f\u101c\u102f\u1036\u1038\u1000\u102d\u102f \u1021\u1005\u102c\u1038\u1011\u102d\u102f\u1038\u1001\u103c\u1004\u103a\u1038 \u1015\u102b\u101d\u1004\u103a\u101e\u100a\u103a\u104b.<\/li>\n<\/ul>\n<h3>\u1021\u1001\u103c\u1031\u1021\u1014\u1031 \u1042- \u201c\u1015\u103c\u1004\u103a\u1015\u1000\u102c\u1000\u103d\u101a\u103a\u1019\u103e\u102f\u201d \u1014\u100a\u103a\u1038\u101c\u1019\u103a\u1038 (IEC 62423)<\/h3>\n<p>DIN-rail \u1010\u1015\u103a\u1006\u1004\u103a\u1011\u102c\u1038\u101e\u1031\u102c <strong>Type B RCD<\/strong> (\u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a <a href=\"https:\/\/test.viox.com\/my\/rcbo-vs-rccb-mcb-comparison-space-cost-selectivity\/\">B RCBO \u101f\u102f\u101b\u102d\u102f\u1000\u103a\u1015\u102b\u104b<\/a>) \u1000\u102d\u102f \u1016\u103c\u1014\u1037\u103a\u1016\u103c\u1030\u1038\u101b\u1031\u1038\u1018\u102f\u1010\u103a\u1010\u103d\u1004\u103a \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1001\u103c\u1004\u103a\u1038\u104b.<\/p>\n<ul>\n<li><strong>\u101c\u102d\u102f\u1021\u1015\u103a\u1001\u103b\u1000\u103a-<\/strong> \u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u1005\u1000\u103a\u1021\u1010\u103d\u1004\u103a\u1038\u104c RDC-DD \u1011\u1015\u103a\u1006\u1031\u102c\u1004\u103a\u1038\u101b\u1014\u103a \u1019\u101c\u102d\u102f\u1021\u1015\u103a\u1015\u102b\u104b Type B RCD \u101e\u100a\u103a AC\u104a pulsating DC \u1014\u103e\u1004\u1037\u103a smooth DC \u1001\u103b\u102d\u102f\u1037\u101a\u103d\u1004\u103a\u1038\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1000\u102d\u102f\u1004\u103a\u1010\u103d\u101a\u103a\u101e\u100a\u103a\u104b.<\/li>\n<li><strong>\u1021\u1000\u1031\u102c\u1004\u103a\u1038\u1021\u1006\u102d\u102f\u1038:<\/strong> \u1017\u101f\u102d\u102f\u1015\u103c\u102f\u1015\u103c\u102f\u1015\u103c\u1004\u103a\u1011\u102d\u1014\u103a\u1038\u101e\u102d\u1019\u103a\u1038\u1019\u103e\u102f\u104a \u1015\u102d\u102f\u1019\u102d\u102f\u1019\u103c\u1004\u1037\u103a\u1019\u102c\u1038\u101e\u1031\u102c \u101a\u102f\u1036\u1000\u103c\u100a\u103a\u1005\u102d\u1010\u103a\u1001\u103b\u101b\u1019\u103e\u102f\u104a \u1015\u103c\u1004\u103a\u1015 DC \u1014\u103e\u1031\u102c\u1004\u1037\u103a\u101a\u103e\u1000\u103a\u1019\u103e\u102f\u1019\u103e \u1000\u1004\u103a\u1038\u101c\u103d\u1010\u103a\u1001\u103c\u1004\u103a\u1038\u104a \u1001\u103b\u102d\u102f\u1037\u101a\u103d\u1004\u103a\u1038\u1001\u103b\u1000\u103a\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1000\u102d\u102f \u101b\u103e\u1004\u103a\u1038\u101c\u1004\u103a\u1038\u1005\u103d\u102c\u1016\u1031\u102c\u103a\u1015\u103c\u1001\u103c\u1004\u103a\u1038 (\u1021\u1006\u1004\u1037\u103a\u1019\u103c\u1004\u1037\u103a\u1019\u1031\u102c\u103a\u1012\u101a\u103a\u1019\u103b\u102c\u1038\u1010\u103d\u1004\u103a)\u104b.<\/li>\n<li><strong>\u1004\u1038\u1039\u1021:<\/strong> \u1000\u1014\u1026\u1038 \u1021\u1005\u102d\u1010\u103a\u1021\u1015\u102d\u102f\u1004\u103a\u1038\u1000\u102f\u1014\u103a\u1000\u103b\u1005\u101b\u102d\u1010\u103a \u1019\u103c\u1004\u1037\u103a\u1019\u102c\u1038\u101e\u100a\u103a\u104b.<\/li>\n<\/ul>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto;\" src=\"https:\/\/img.viox.com\/Technical-Schematic---Protection-Architecture-Comparison.webp\" alt=\"Comparison of Integrated vs External EV Protection Architecture Options\" \/><figcaption style=\"font-style: italic; text-align: center; color: #555; margin-top: 8px;\">\u1000\u102c\u1000\u103d\u101a\u103a\u101b\u1031\u1038\u1017\u102d\u101e\u102f\u1000\u102c \u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u1005\u101b\u102c\u1019\u103b\u102c\u1038- \u1015\u1031\u102b\u1004\u103a\u1038\u1005\u1015\u103a\u1011\u102c\u1038\u101e\u1031\u102c 6mA RDC-DD (\u1018\u101a\u103a\u1018\u1000\u103a) \u1014\u103e\u1004\u1037\u103a \u1015\u103c\u1004\u103a\u1015 Type B RCD (\u100a\u102c\u1018\u1000\u103a)\u104b.<\/figcaption><\/figure>\n<h2>\u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u1019\u103e\u102f \u1006\u102f\u1036\u1038\u1016\u103c\u1010\u103a\u1001\u103c\u1004\u103a\u1038 \u1019\u1030\u1018\u1031\u102c\u1004\u103a<\/h2>\n<p>\u1015\u101b\u1031\u102c\u1002\u103b\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u1021\u1010\u103d\u1000\u103a \u1000\u102c\u1000\u103d\u101a\u103a\u101b\u1031\u1038\u1000\u102d\u102f \u101e\u1010\u103a\u1019\u103e\u1010\u103a\u101e\u100a\u1037\u103a\u1021\u1001\u102b IEC 60364-7-722 \u1014\u103e\u1004\u1037\u103a \u1000\u102d\u102f\u1000\u103a\u100a\u102e\u1000\u103c\u1031\u102c\u1004\u103a\u1038 \u101e\u1031\u1001\u103b\u102c\u1005\u1031\u101b\u1014\u103a \u1024\u101a\u102f\u1010\u1039\u1010\u102d\u1017\u1031\u1012\u1000\u102d\u102f \u101c\u102d\u102f\u1000\u103a\u1014\u102c\u1015\u102b-<\/p>\n<ol>\n<li><strong>\u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u1005\u1000\u103a \u1012\u1031\u1010\u102c\u1005\u102c\u101b\u103d\u1000\u103a\u1000\u102d\u102f \u1005\u1005\u103a\u1006\u1031\u1038\u1015\u102b-<\/strong> EVSE (\u101c\u103b\u103e\u1015\u103a\u1005\u1005\u103a\u101a\u102c\u1009\u103a \u1011\u1031\u102c\u1000\u103a\u1015\u1036\u1037\u101b\u1031\u1038\u1015\u1005\u1039\u1005\u100a\u103a\u1038) \u101e\u100a\u103a IEC 62955 \u1014\u103e\u1004\u1037\u103a \u1000\u102d\u102f\u1000\u103a\u100a\u102e\u101e\u1031\u102c RDC-DD \u1000\u102d\u102f \u1011\u100a\u1037\u103a\u101e\u103d\u1004\u103a\u1038\u1011\u102c\u1038\u1000\u103c\u1031\u102c\u1004\u103a\u1038 \u1000\u103c\u1031\u100a\u102c\u1015\u102b\u101e\u101c\u102c\u1038\u104b\n<ul>\n<li><strong>\u101f\u102f\u1010\u103a\u1000\u1032\u1037-<\/strong> \u101e\u1004\u103a\u101e\u100a\u103a <strong>\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038 A<\/strong> (\u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a Type F) RCD\/RCBO \u1000\u102d\u102f panel \u1010\u103d\u1004\u103a \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a\u104b.<\/li>\n<li><strong>\u1019\u101f\u102f\u1010\u103a\u1015\u102b-<\/strong> \u60a8 <strong>\u6839\u636e<\/strong> \u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1015\u102b <strong>B \u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038<\/strong> RCD \u1000\u102d\u102f panel \u1010\u103d\u1004\u103a \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u1015\u102b\u104b.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Upstream Selectivity \u1000\u102d\u102f \u1005\u1005\u103a\u1006\u1031\u1038\u1015\u102b-<\/strong>\n<ul>\n<li>\u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u1005\u1000\u103a\u1021\u1010\u103d\u1000\u103a Type B RCD \u1000\u102d\u102f \u1010\u1015\u103a\u1006\u1004\u103a\u1015\u102b\u1000 <em>fuse \u1000\u1021\u1014\u102d\u102f\u1004\u103a\u101b\u1010\u101a\u103a (\u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u101e\u1030\u1010\u102d\u102f\u1037\u1014\u103e\u1005\u103a\u101a\u1031\u102c\u1000\u103a\u1005\u101c\u102f\u1036\u1038 \u1001\u101b\u102e\u1038\u1011\u103d\u1000\u103a\u101e\u103d\u102c\u1038\u1010\u101a\u103a)\u104b<\/em> main RCD \u101e\u100a\u103a Type A \u1019\u101f\u102f\u1010\u103a\u1000\u103c\u1031\u102c\u1004\u103a\u1038 \u101e\u1031\u1001\u103b\u102c\u1015\u102b\u1005\u1031\u104b Type B \u1019\u103e\u1010\u1006\u1004\u1037\u103a \u1016\u103c\u1010\u103a\u101e\u1014\u103a\u1038\u101e\u103d\u102c\u1038\u101e\u1031\u102c DC \u1001\u103b\u102d\u102f\u1037\u101a\u103d\u1004\u103a\u1038\u1001\u103b\u1000\u103a\u101e\u100a\u103a upstream Type A \u1000\u102d\u102f \u1019\u103b\u1000\u103a\u1005\u102d\u1000\u103d\u101a\u103a\u1005\u1031\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a\u104b \u1021\u1000\u1031\u102c\u1004\u103a\u1038\u1006\u102f\u1036\u1038\u1021\u102c\u1038\u1016\u103c\u1004\u1037\u103a EV \u1006\u102c\u1038\u1000\u1005\u103a\u1000\u102d\u102f \u1021\u1001\u103c\u102c\u1038\u1006\u102c\u1038\u1000\u1005\u103a\u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a\u1021\u1015\u103c\u102d\u102f\u1004\u103a \u1001\u103b\u102d\u1010\u103a\u1006\u1000\u103a\u101e\u1004\u1037\u103a\u101e\u100a\u103a\u104a \u101a\u1031\u1018\u102f\u101a\u103b Type A \u104f downstream \u1019\u101f\u102f\u1010\u103a\u1015\u102b <a href=\"https:\/\/test.viox.com\/my\/rccb\/\">RCCB<\/a>, \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a main switch \u101e\u100a\u103a Type B (\u101b\u103e\u102c\u1038\u1015\u102b\u1038\/\u1005\u103b\u1031\u1038\u1000\u103c\u102e\u1038) \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a non-RCD (TN-C-S\/TN-S \u1001\u103d\u1004\u1037\u103a\u1015\u103c\u102f\u1015\u102b\u1000) \u1016\u103c\u1005\u103a\u101e\u1004\u1037\u103a\u101e\u100a\u103a\u104b.<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u1005\u102e\u1038\u1015\u103d\u102c\u1038\u1016\u103c\u1005\u103a \u1015\u1010\u103a\u101d\u1014\u103a\u1038\u1000\u103b\u1004\u103a\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1011\u100a\u1037\u103a\u101e\u103d\u1004\u103a\u1038\u1005\u1009\u103a\u1038\u1005\u102c\u1038\u1015\u102b-<\/strong>\n<ul>\n<li>\u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u1005\u1000\u103a\u1019\u103b\u102c\u1038\u1005\u103d\u102c\u1015\u102b\u101b\u103e\u102d\u101e\u1031\u102c \u1005\u102e\u1038\u1015\u103d\u102c\u1038\u1016\u103c\u1005\u103a \u1006\u1000\u103a\u1010\u1004\u103a\u1019\u103b\u102c\u1038\u1010\u103d\u1004\u103a \u1005\u102f\u1015\u103c\u102f\u1036\u101c\u102c\u101e\u1031\u102c \u101a\u102d\u102f\u1005\u102d\u1019\u1037\u103a\u1019\u103e\u102f (\u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u1005\u1000\u103a\u1010\u1005\u103a\u1001\u102f\u101c\u103b\u103e\u1004\u103a 6mA \u1021\u1031\u102c\u1000\u103a\u1015\u1004\u103a) \u101e\u100a\u103a \u1015\u103c\u103f\u1014\u102c\u1016\u103c\u1005\u103a\u1014\u102d\u102f\u1004\u103a\u101e\u100a\u103a\u104b. <strong>\u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038 B \u1021\u102c\u101b\u103a\u1005\u102e\u1012\u102e\u1019\u103b\u102c\u1038<\/strong> \u101e\u100a\u103a \u1010\u102c\u101b\u103e\u100a\u103a\u1001\u1036\u1019\u103e\u102f\u1021\u1010\u103d\u1000\u103a \u1015\u102d\u102f\u1019\u102d\u102f\u1014\u103e\u1005\u103a\u101e\u1000\u103a\u1015\u103c\u102e\u1038 \u1021\u1010\u103d\u1004\u103a\u1038\u1015\u102d\u102f\u1004\u103a\u1038\u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u1005\u1000\u103a \u1021\u102e\u101c\u1000\u103a\u1011\u101b\u103d\u1014\u103a\u1038\u1014\u1005\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038\u1019\u103b\u102c\u1038\u104f \u1000\u103d\u1032\u1015\u103c\u102c\u1038\u101e\u1031\u102c \u1021\u101b\u100a\u103a\u1021\u101e\u103d\u1031\u1038\u1000\u102d\u102f \u1021\u102c\u1038\u1000\u102d\u102f\u1038\u1001\u103c\u1004\u103a\u1038\u1000\u102d\u102f \u101b\u103e\u1031\u102c\u1004\u103a\u101b\u103e\u102c\u1038\u101b\u1014\u103a\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto;\" src=\"https:\/\/img.viox.com\/EV-Distribution-Board-Installation.webp\" alt=\"Commercial EV electrical distribution board installation\" \/><figcaption style=\"font-style: italic; text-align: center; color: #555; margin-top: 8px;\">\u1005\u102e\u1038\u1015\u103d\u102c\u1038\u1016\u103c\u1005\u103a EV \u1016\u103c\u1014\u1037\u103a\u1016\u103c\u1030\u1038\u101b\u1031\u1038\u1018\u102f\u1010\u103a\u1010\u103d\u1004\u103a VIOX Type B RCDs \u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1000\u103b\u103d\u1019\u103a\u1038\u1000\u103b\u1004\u103a\u1005\u103d\u102c \u1010\u1015\u103a\u1006\u1004\u103a\u1001\u103c\u1004\u103a\u1038\u104b.<\/figcaption><\/figure>\n<h2>\u1000\u102f\u1014\u103a\u1000\u103b\u1005\u101b\u102d\u1010\u103a\u1014\u103e\u1004\u1037\u103a \u1018\u1031\u1038\u1000\u1004\u103a\u1038\u101c\u102f\u1036\u1001\u103c\u102f\u1036\u101b\u1031\u1038 \u1001\u103d\u1032\u1001\u103c\u1019\u103a\u1038\u1005\u102d\u1010\u103a\u1016\u103c\u102c\u1001\u103c\u1004\u103a\u1038<\/h2>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\" border=\"1\">\n<thead style=\"background-color: #f2f2f2;\">\n<tr>\n<th style=\"padding: 10px;\">\u1021\u1005\u102d\u1010\u103a\u1021\u1015\u102d\u102f\u1004\u103a\u1038 \u1019\u101f\u102c\u1017\u103b\u1030\u101f\u102c<\/th>\n<th style=\"padding: 10px;\">\u1005\u1000\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038\u1000\u102f\u1014\u103a\u1000\u103b\u1005\u101b\u102d\u1010\u103a<\/th>\n<th style=\"padding: 10px;\">\u1010\u1015\u103a\u1006\u1004\u103a\u1001\u1021\u101c\u102f\u1015\u103a\u101e\u1019\u102c\u1038<\/th>\n<th style=\"padding: 10px;\">\u101a\u102f\u1036\u1000\u103c\u100a\u103a\u1005\u102d\u1010\u103a\u1001\u103b\u101b\u1019\u103e\u102f<\/th>\n<th style=\"padding: 10px;\">\u1015\u103c\u102f\u1015\u103c\u1004\u103a\u1011\u102d\u1014\u103a\u1038\u101e\u102d\u1019\u103a\u1038\u1019\u103e\u102f<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px;\"><strong>Type A RCD + 6mA RDC-DD (Built-in)<\/strong><\/td>\n<td style=\"padding: 10px;\">\u1021\u1014\u102d\u1019\u1037\u103a<\/td>\n<td style=\"padding: 10px;\">\u1005\u1036<\/td>\n<td style=\"padding: 10px;\">EVSE \u1021\u101b\u100a\u103a\u1021\u101e\u103d\u1031\u1038\u1015\u1031\u102b\u103a\u1010\u103d\u1004\u103a \u1019\u1030\u1010\u100a\u103a\u101e\u100a\u103a\u104b<\/td>\n<td style=\"padding: 10px;\">\u101b\u103e\u102f\u1015\u103a\u1011\u103d\u1031\u1038\u101e\u100a\u103a (\u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u1005\u1000\u103a \u1015\u103c\u102f\u1015\u103c\u1004\u103a\u1001\u103c\u1004\u103a\u1038)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Type B RCD (\u1015\u103c\u1004\u103a\u1015)<\/strong><\/td>\n<td style=\"padding: 10px;\">\u1019\u103c\u1004\u1037\u103a<\/td>\n<td style=\"padding: 10px;\">\u1005\u1036<\/td>\n<td style=\"padding: 10px;\"><strong>\u1021\u101c\u103d\u1014\u103a\u1019\u103c\u1004\u1037\u103a\u1019\u102c\u1038\u101e\u100a\u103a (\u1005\u1000\u103a\u1019\u103e\u102f\u1021\u1006\u1004\u1037\u103a)<\/strong><\/td>\n<td style=\"padding: 10px;\">\u101b\u102d\u102f\u1038\u101b\u103e\u1004\u103a\u1038\u101e\u100a\u103a (Breaker \u101c\u1032\u101c\u103e\u101a\u103a\u1001\u103c\u1004\u103a\u1038)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Type F RCD + RDC-DD<\/strong><\/td>\n<td style=\"padding: 10px;\">\u101c\u1010\u103a<\/td>\n<td style=\"padding: 10px;\">\u1005\u1036<\/td>\n<td style=\"padding: 10px;\">\u101c\u1010\u103a<\/td>\n<td style=\"padding: 10px;\">\u101b\u103e\u102f\u1015\u103a\u1011\u103d\u1031\u1038\u101e\u100a\u103a\u104b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u1010\u1014\u103a\u1016\u102d\u102f\u1038\u1019\u103c\u1004\u1037\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038\u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u1021\u101b\u1031\u1038\u1000\u103c\u102e\u1038\u101e\u1031\u102c \u1021\u1001\u103c\u1031\u1001\u1036\u1021\u1006\u1031\u102c\u1000\u103a\u1021\u1021\u102f\u1036\u1019\u103b\u102c\u1038\u1021\u1010\u103d\u1000\u103a <strong>Type B RCD<\/strong> \u101e\u100a\u103a \u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u1005\u1000\u103a\u104f \u1021\u1010\u103d\u1004\u103a\u1038\u1015\u102d\u102f\u1004\u103a\u1038 \u1021\u102e\u101c\u1000\u103a\u1011\u101b\u103d\u1014\u103a\u1038\u1014\u1005\u103a\u1015\u1005\u1039\u1005\u100a\u103a\u1038\u1019\u103b\u102c\u1038\u1014\u103e\u1004\u1037\u103a \u101c\u103d\u1010\u103a\u101c\u1015\u103a\u1019\u103e\u102f\u1000\u103c\u1031\u102c\u1004\u1037\u103a \u1021\u1004\u103a\u1002\u103b\u1004\u103a\u1014\u102e\u101a\u102c\u1006\u102d\u102f\u1004\u103a\u101b\u102c \u1026\u1038\u1005\u102c\u1038\u1015\u1031\u1038\u1021\u1016\u103c\u1005\u103a \u1006\u1000\u103a\u101c\u1000\u103a\u1010\u100a\u103a\u101b\u103e\u102d\u1014\u1031\u1015\u102b\u101e\u100a\u103a\u104b \u1021\u1005\u102f\u101c\u102d\u102f\u1000\u103a\u1021\u102d\u1019\u103a\u101b\u102c\u1019\u103b\u102c\u1038\u1021\u1010\u103d\u1000\u103a <strong>Type A + RDC-DD<\/strong> \u1019\u1031\u102c\u103a\u1012\u101a\u103a\u101e\u100a\u103a \u1005\u102e\u1038\u1015\u103d\u102c\u1038\u101b\u1031\u1038\u1005\u1036\u1014\u103e\u102f\u1014\u103a\u1038\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto;\" src=\"https:\/\/img.viox.com\/Technical-Flowchart---RCD-Selection-Decision-Tree.webp\" alt=\"Decision Tree Flowchart for Selecting EV Charger Protection\" \/><figcaption style=\"font-style: italic; text-align: center; color: #555; margin-top: 8px;\">\u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u1005\u1000\u103a \u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1001\u103b\u1000\u103a\u1019\u103b\u102c\u1038\u1021\u1015\u1031\u102b\u103a \u1021\u1001\u103c\u1031\u1001\u1036\u104d Type A \u1014\u103e\u1004\u1037\u103a Type B RCDs \u1021\u1000\u103c\u102c\u1038 \u101b\u103d\u1031\u1038\u1001\u103b\u101a\u103a\u101b\u1014\u103a\u1021\u1010\u103d\u1000\u103a \u1021\u1006\u1004\u1037\u103a\u1006\u1004\u1037\u103a \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<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<p><strong>\u1019\u1031\u1038- EV \u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u101b\u1014\u103a\u1021\u1010\u103d\u1000\u103a Type AC RCD \u1000\u102d\u102f \u101e\u102f\u1036\u1038\u1014\u102d\u102f\u1004\u103a\u1015\u102b\u101e\u101c\u102c\u1038\u104b<\/strong><br \/>\nA- <strong>\u1019\u101b\u103e\u102d<\/strong> Type AC RCDs \u1019\u103b\u102c\u1038\u1000\u102d\u102f EV \u1021\u102c\u1038\u101e\u103d\u1004\u103a\u1038\u101b\u1014\u103a\u1021\u1010\u103d\u1000\u103a \u1010\u101b\u102c\u1038\u1005\u102e\u101b\u1004\u103a\u1015\u102d\u102f\u1004\u103a\u1001\u103d\u1004\u1037\u103a\u1021\u1019\u103b\u102c\u1038\u1005\u102f\u1010\u103d\u1004\u103a (IEC 60364-7-722 \u1021\u1031\u102c\u1000\u103a\u1010\u103d\u1004\u103a \u1021\u1015\u102b\u1021\u101d\u1004\u103a) \u1010\u102c\u1038\u1019\u103c\u1005\u103a\u1011\u102c\u1038\u101e\u100a\u103a\u104a \u1021\u1000\u103c\u1031\u102c\u1004\u103a\u1038\u1019\u103e\u102c \u104e\u1004\u103a\u1038\u1010\u102d\u102f\u1037\u101e\u100a\u103a EV \u1015\u103c\u102f\u1015\u103c\u1004\u103a\u1015\u103c\u1031\u102c\u1004\u103a\u1038\u101c\u1032\u101b\u1031\u1038 \u1006\u102c\u1038\u1000\u1005\u103a\u1019\u103b\u102c\u1038\u1010\u103d\u1004\u103a \u1021\u1016\u103c\u1005\u103a\u1019\u103b\u102c\u1038\u101e\u1031\u102c pulsating DC \u1000\u102d\u102f \u101b\u103e\u102c\u1016\u103d\u1031\u104d\u1019\u101b\u101e\u1031\u102c\u1000\u103c\u1031\u102c\u1004\u1037\u103a\u1016\u103c\u1005\u103a\u101e\u100a\u103a\u104b.<\/p>\n<p><strong>\u1019\u1031\u1038- Type B RCD \u101b\u103e\u102d\u1015\u102b\u1000 \u1019\u103c\u1031\u1005\u102d\u102f\u1000\u103a\u1001\u103b\u1031\u102c\u1004\u103a\u1038 \u101c\u102d\u102f\u1021\u1015\u103a\u1015\u102b\u101e\u101c\u102c\u1038\u104b<\/strong><br \/>\n\u1016\u103c\u1031- RCD \u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u101e\u100a\u103a \u101a\u102d\u102f\u1005\u102d\u1019\u1037\u103a\u1019\u103e\u102f\u1000\u102d\u102f \u101b\u103e\u102c\u1016\u103d\u1031\u1001\u103c\u1004\u103a\u1038\u1000\u102d\u102f \u100a\u103d\u103e\u1014\u103a\u1015\u103c\u101e\u100a\u103a\u104a \u1019\u103c\u1031\u1005\u102d\u102f\u1000\u103a\u1001\u103b\u102d\u1010\u103a\u1006\u1000\u103a\u1019\u103e\u102f\u1019\u103b\u102c\u1038\u1000\u102d\u102f \u1019\u101f\u102f\u1010\u103a\u1015\u102b\u104b \u101e\u102d\u102f\u1037\u101e\u1031\u102c\u103a PME (TN-C-S) \u1011\u1031\u102c\u1000\u103a\u1015\u1036\u1037\u1019\u103e\u102f\u1019\u103b\u102c\u1038\u1021\u1010\u103d\u1000\u103a Type B \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a Type A RCD \u1000\u102d\u102f \u1021\u101e\u102f\u1036\u1038\u1015\u103c\u102f\u101e\u100a\u103a\u1016\u103c\u1005\u103a\u1005\u1031 open-PEN \u101b\u103e\u102c\u1016\u103d\u1031\u101b\u1031\u1038\u1000\u102d\u101b\u102d\u101a\u102c \u101e\u102d\u102f\u1037\u1019\u101f\u102f\u1010\u103a \u1019\u103c\u1031\u1005\u102d\u102f\u1000\u103a\u1001\u103b\u1031\u102c\u1004\u103a\u1038 \u101c\u102d\u102f\u1021\u1015\u103a\u1014\u102d\u102f\u1004\u103a\u101e\u1031\u1038\u101e\u100a\u103a\u104b.<\/p>\n<p><strong>\u1019\u1031\u1038- RDC-MD \u1014\u103e\u1004\u1037\u103a RDC-PD \u1021\u1000\u103c\u102c\u1038 \u1000\u103d\u102c\u1001\u103c\u102c\u1038\u1001\u103b\u1000\u103a\u1000\u1018\u102c\u101c\u1032\u104b<\/strong><br \/>\n\u1016\u103c\u1031- \u1014\u103e\u1005\u103a\u1001\u102f\u1005\u101c\u102f\u1036\u1038\u1000\u102d\u102f IEC 62955 \u1010\u103d\u1004\u103a \u101e\u1010\u103a\u1019\u103e\u1010\u103a\u1011\u102c\u1038\u101e\u100a\u103a\u104b \u1010\u1005\u103a\u1001\u102f <strong>RDC-MD<\/strong> <em>\u1005\u1031\u102c\u1004\u1037\u103a\u1000\u103c\u100a\u1037\u103a\u101e\u100a\u103a\u104b<\/em> leakage and tells a contactor to open (cheaper, integrated). An <strong>RDC-PD<\/strong> has its own <em>\u1021\u1000\u102c\u1021\u1000\u103d\u101a\u103a<\/em> (switching) mechanism, making it safer if the contactor welds shut.<\/p>\n<p><strong>Q: Can I use a Type B RCD downstream of a Type A RCD?<\/strong><br \/>\nA: Generally, no. Ideally, RCDs should be coordinated. If a DC fault occurs, it flows through both. The downstream Type B will trip, but the DC current might have already blinded the upstream Type A, disabling it for other circuits. Best practice is to connect the EV circuit in parallel or ensure the upstream device is also Type B (or time-delayed Type S, if appropriate for the system earthing).<\/p>\n<hr \/>\n<p><em>For more information on selecting the right circuit protection for your projects, explore our guides on <a href=\"https:\/\/test.viox.com\/my\/electrical-derating-temperature-altitude-grouping-factors\/\">Electrical Derating Factors<\/a> \u1014\u103e\u1004\u1037\u103a <a href=\"https:\/\/test.viox.com\/my\/types-of-circuit-breakers\/\">Circuit Breakers \u1021\u1019\u103b\u102d\u102f\u1038\u1021\u1005\u102c\u1038\u1019\u103b\u102c\u1038<\/a>.<\/em><\/p>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 3857.31px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 3857.31px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>For electrical engineers and installers, the rapid expansion of Electric Vehicle (EV) infrastructure presents a specific protection challenge: DC fault currents. Unlike standard household loads, the rectification circuits within EV On-Board Chargers (OBC) can generate smooth DC leakage currents in the event of a fault. If not properly isolated, these DC currents can blind upstream [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":21293,"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-21292","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\/21292","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=21292"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/posts\/21292\/revisions"}],"predecessor-version":[{"id":21294,"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/posts\/21292\/revisions\/21294"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/media\/21293"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/media?parent=21292"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/categories?post=21292"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/my\/wp-json\/wp\/v2\/tags?post=21292"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}