... For protecting cables and equipments against overload and short circuit.2. General rules for choosing MCB:a. Technical data of ... breakdown lamps). SpecificationStandardIEC/EN 60898-1Electrical featuresRated Current InA1,2,6,10,16,20,25,32,40,50,63PolesP1 ... FrequencyHz50/60Rated Breaking CapacityA3000,4500Rated Impulse withstand Voltage(1.2/50)UimpV4000Dielectric Test Voltage at ind.Freq.for 1min ...