I am not aware of the transformer primary source, but it appears to be the 11kV bus for the whole plant. I note that on the single line diagram for the 11kv there is a core balance CT that detects earth fault. This is on the 11kv feed to the transformer.
it is difficult to know the type of the...
I am unaware of the transformer primary neutral configuration as it is all internal inside the transformer. only the secondary neutral is brought out to terminals and is currently not connected. there is no tertiary delta winding
the existing system has a 6 pulse thyristor front end powering a...
I have a project that requires replacing an AC drive system, which is powered by a 3MVA 11kv//690V wye-wye transformer that is not grounded. The secondary has the neutral point available but it is not connected. I am not comfortable in leaving the system floating and the equipment manufacturer...
