How to check the wiring of the three-phase four-wire electric energy meter with Electric Sensor Test Pencil base bulb phase check method
Three-phase four-wire electric energy meter, wiring inspection and phase checking method. Two inspection lamps are connected in series, and the two lead wires are across the contacts: the voltage terminal of a certain component, and the current power line of the phase.
If the light is on, it means that the wiring is wrong, and the voltage and current are out of phase. If the wiring is correct, the light does not light up, and the voltage and current are in the same phase.
