ID residual current circuit breaker Multi 9 OEM, 30mA. 4-pole, nominal current 63A, type A-SI, operating voltage (Ue) 400-415V, insulation voltage (Ui) 440V. ID residual current circuit breakers offer protection against electric shock from direct and indirect contact and fire protection in the event of insulation faults. Technology of the trip unit - differential current. The ID residual current circuit breaker meets the following standards - IEC/EN 61008-1.