Operatimg times of RCD

Requirements for measuring the operating times of RCDs used for fault protection:

General purpose RCDs and RCBOs to BS EN 61008 and BS EN 61009

Instrument test setting Satisfactory Result
50% of rated residual operating current (IΔn) The device should not trip
100% of rated residual operating current (IΔn) The device should open in a time less than 300 ms

Time delay (type-S) RCDs and RCBOs to BS EN 61008 and BS EN 61009

Instrument test setting Satisfactory Result
50% of rated residual operating current (IΔn) The device should not trip
100% of rated residual operating current (IΔn) The device should open in a time between 130 ms and 500 ms