Version 6.2, February 2025
SolarEdge Solution Connection and Configuration Guide for Australia 49
Section 7.3.4.1 of AS/NZS 3000:2018 details the general requirements for the AC isolation switch in
accordance with clause 2.3.2.2. Requirements of AS/NZS 4777 series are deemed to satisfy these
requirements, however. Section 2.6.2.2 defines the specific types of RCD's and their application.
There are 6 different types of RCD's available and complaint for installation depending upon the
characteristic of supply, these being:
Type A RCD - Residential sinusoidal waveforms.
Type A RCD - Residential pulsating direct currents
Type I RCD - Residual alternating currents not exceeding 10mA, interrupt time not exceeding
40ms
Type F RCD - Composite residual, pulsating direct or high frequency leakage currents
Type B RCD - Residual sinusoidal up to 1000Hz, alternating or pulsating, residual direct
currents
Type S RCD - Specifically designed where tripping is delayed after a pre-determined time
Mitigation of nuisance tripping
Section 2.6.3.2.3.3 of AS/NZS 3000:2018 details the requirements wherever a 30mA RCD shall be
provided for final subcircuits with a rating not exceeding 32A. However, exceptions to these
requirements apply as per clause 2.6.3.2.3.3 Exceptions 3 (II) which states that 'These requirements
need not apply to the following'…' may cause spurious nuisance tripping through high leakage
currents being generated in the normal operation of the equipment'.
Installation and selection of an external RCD device
Installation of an RCD must always be conducted in accordance with local electrical regulations and
standards. SolarEdge recommends the use of a type-A RCD. Unless a lower value is required by the
specific local electric regulations.
For Single Phase inverter installations SolarEdge suggests an RCD value between 30mA and 100mA.
If an RCD is used, 100mA is required for installations above 20kWdc whereas a 30mA RCD is
required for installations below 20kWdc.
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