Quote:
Originally Posted by Brutus  Hi Charlie
basically no - GN3 says that motor circuits (which this is) then the loop imepodence is ONLY measured at the supply side of isolated motor control gear.
Do R1+R2 checks on the three phase supply to the contactor, and again on the other side to the socket.
Then either calculate Zs = Ze + (R1+R2)+(R1+R2)
or add the additional socket side R1+R2 to the measured Zs.
And rememebr, you ONLY have to measure Zs at the socket outlets, C&G state for all other points, measure or calculate. |
Understand what you are saying but thought that applied for the dangers involved with testing on a live moving motor as the test rig as a socket and therefore danger as been reduced to a minimum i would have thought this to be o.k.