General ***It is TypeA-SI Time Delayed RCD RCCB ELCB 2P 4P 40A 63A 30mA***Earth-Leakage Protection Cla : type A-SI (Super Immunised) Type A RCD Features:Tripping is ensured for sinusoidal, alternating residual currents as well as for pulsed DC residual currents, whether they be quickly applied or slowly increase.Application: loads with electronics, rectifiers, instruments.Type SI RCDFeatures:It's designed to avoid nuisance tripping or non-tripping in case of polluted network, lightning effect, high frequency currents, RF waves, etc.SI type RCDs present a small tripping delay (80s~500s), allowing to let pa this transient current without nuisance tripping.In certain cases, aspects of the environment can disturb the correct operation of RCDs:"nuisance" tripping: Break in power supply without the situation being really hazardous. This type of tripping is often repetitive, causing major inconvenience and detrimental to the quality of the user's electrical powersupply.Non-tripping, in the event of a hazard. Le perceptible than nuisance tripping, these malfunctions must still be examined carefully since they undermine user safety. Company Information