Hi all. Does anyone know how these work?
Basically i was on a job today (pipe fitting, not elec) and they had used isolators, then dol starters/overloads, and finally an rcd before a 3 phase commando outlet.
Do 3 phase RCD's measure the current down each phase and compare it, rather than comparing it between the live and neutral?
There was no neutral connected to the supply of rcd, but there was from the rcd to the commando socket.
Basically i was on a job today (pipe fitting, not elec) and they had used isolators, then dol starters/overloads, and finally an rcd before a 3 phase commando outlet.
Do 3 phase RCD's measure the current down each phase and compare it, rather than comparing it between the live and neutral?
There was no neutral connected to the supply of rcd, but there was from the rcd to the commando socket.