Solar Photovoltaic
(PV)
Part 8, SP 30:2023 sets the requirements for RCDs protecting solar PV installations
What type of RCD should you use?
Part 8, SP 30:2023 specifies the requirements for electrical installations with Solar PV systems.
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Cl. 4.12.3.8 Requires protection against electric shock to be provided by a type B RCD conforming to IEC 62423.
Is an RCD required for Solar PV?
Part 8, SP 30:2023 specifies the requirements for electrical installations with Solar PV systems.
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Cl. 8.8.2, Requires a.c. distribution panels to have type B RCDs conforming to IEC 62423.
Requirements for RCDs according to the system earthing configuration
IS/IEC 62548: explains the various possible configurations of system earthing in electrical installations with PV arrays. The most common are:
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Non-separated system with earthed a.c. mains:
Connection of PV array to earthed a.c. mains with a non-separated inverter.
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RCD (if used) shall always be type B.
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Separated system (inverter with internal separation) with earthed a.c. mains:
Connection of PV array to earthed a.c. mains with an inverter having internal separation.
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With functional earthing of PV array
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Without functional earthing of PV array
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Selection of RCD type according to connected load.
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Separated system (inverter with external separation) with earthed a.c. mains:
Connection of PV array to earthed a.c. mains with an inverter and external transformer.
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With functional earthing of PV array
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Without functional earthing of PV array
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Selection of RCD type according to connected load.
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Doepke RCCBs for EVSE Applications
Doepke produces type B 30mA RCCBs, type A 30mA RCCBs with built-in RDC-DDs as well as type F 30mA RCCBs with built-in RDC-DDs which facilitate compliance with NEC 2023 for EV charging applications.
30mA Type B
30mA Type A with built-in RDC-DD
30mA Type F with built-in RDC-DD