G PHYSICS
G01 MEASURING; TESTING
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31/00 Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
G01R31/327 Testing of circuit interrupters, switches or circuit-breakers
G01R31/3277 of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches