IEC 60664-1Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests INS-1250Impulse Insulation Testers from 500 V to 30 kV INS-1250 MIG1203 STEPMIG1203 with STEP function MIG1203 STEP InsulationImpulse insulation testing Voltage impulse insulation testing 1.2/50 us for low-voltage systemsIEC / EN productIEC 60664-1