{"id":2627,"date":"2026-03-14T07:36:41","date_gmt":"2026-03-14T07:36:41","guid":{"rendered":"https:\/\/cnkuangya.com\/?p=2627"},"modified":"2026-09-17T10:49:40","modified_gmt":"2026-09-17T02:49:40","slug":"type-b-rccb-or-type-a-rdc-dd-the-2026-european-cost-guide-to-choosing-the-right-ev-charging-protection","status":"publish","type":"post","link":"https:\/\/cnkuangya.com\/es\/blog\/type-b-rccb-or-type-a-rdc-dd-the-2026-european-cost-guide-to-choosing-the-right-ev-charging-protection\/","title":{"rendered":"\u00bfTipo B RCCB o Tipo A + RDC-DD? La gu\u00eda europea de costes 2026 para elegir la protecci\u00f3n de recarga de VE adecuada"},"content":{"rendered":"

For AC EV charging, the practical choice is usually between a Type B RCD<\/strong> and a Type A or Type F RCD combined with a 6 mA RDC-DD<\/strong>. Both arrangements can be suitable, but they are not interchangeable in every installation. The EV charger design, built-in DC residual-current protection, manufacturer instructions and national wiring rules determine which option is permitted.<\/p>\n\n\n\n

Respuesta r\u00e1pida:<\/strong> use a Type B RCD when the charging equipment can produce smooth DC residual current and no suitable 6 mA RDC-DD is provided. A Type A or Type F RCD may be used with an IEC 62955-compliant RDC-DD when the EVSE manufacturer and local rules allow that combination. Do not select either solution from charger power alone.<\/p>\n\n\n\n

\"Type<\/figure>\n\n\n\n

Type B RCD vs Type A + RDC-DD: Quick Comparison<\/h2>\n\n\n\n
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Selection point<\/th>Type B RCD<\/th>Type A\/F + 6 mA RDC-DD<\/th><\/tr><\/thead>
AC and pulsating DC residual current<\/td>Detected<\/td>Detected by the Type A or Type F RCD<\/td><\/tr>\n
Smooth DC residual current<\/td>Detected by the Type B RCD<\/td>RDC-DD detects DC residual current and initiates disconnection before it can impair the upstream RCD<\/td><\/tr>\n
Equipment dependency<\/td>Lower when installed as a separate protective device<\/td>Depends on a compatible, correctly integrated RDC-DD and switching arrangement<\/td><\/tr>\n
Typical hardware cost<\/td>Usually higher<\/td>Often lower when the charger already includes the RDC-DD<\/td><\/tr>\n
Best starting point<\/td>No compliant RDC-DD, uncertain charger design, or manufacturer requires Type B<\/td>EVSE includes compliant 6 mA DC detection and instructions permit Type A or Type F upstream<\/td><\/tr>\n<\/tbody><\/table><\/figure>\n\n\n\n

This table is a selection aid, not a substitute for the EVSE installation manual or the rules that apply in the country of installation.<\/p>\n\n\n\n

Why EV Chargers Need DC Residual-Current Protection<\/h2>\n\n\n\n

An EV contains power-electronic circuits that can introduce a smooth DC component into a residual fault current. Excessive smooth DC can affect the magnetic operation of an upstream Type A RCD and prevent it from responding as intended to other residual-current waveforms. The installation therefore needs a defined method of dealing with this DC component.<\/p>\n\n\n\n

For Mode 3 AC charging, two widely used approaches are a Type B RCD or a Type A\/Type F RCD used with an RDC-DD conforming to IEC 62955. The correct arrangement must also provide any required 30 mA additional protection and suitable overcurrent protection.<\/p>\n\n\n\n

How a Type B RCD Protects an EV Charging Circuit<\/h2>\n\n\n\n

A Tipo B RCCB<\/a> is designed to respond to sinusoidal AC, pulsating DC and smooth DC residual currents, together with other specified waveforms and frequencies within its product standard. This makes Type B a broad residual-current protection solution for equipment using rectifiers, inverters and power converters.<\/p>\n\n\n\n

The device’s rated residual operating current, such as 30 mA, must not be confused with the 6 mA DC threshold associated with an RDC-DD. A Type B RCD operates according to its specified Type B characteristics; it is not simply a \u201c10 mA DC detector.\u201d Always use the manufacturer’s declared curves, ratings and standards.<\/p>\n\n\n\n

When Type B Is the Stronger Choice<\/h3>\n\n\n\n