EN 50470-1Electricity metering equipment (a.c.) Part 1: General requirements, tests and test conditions - Metering equipment (class indexes A, B and C) INS-0805Overvoltage impulse tester 1.2/50us with 0.5J and 500Ohm from 500V to 8kV INS-0805 Electricity meter testingIEC / EN productEN 50470-1
