How can I protect my three phase variable transformer from excessive currents?

Submitted byglx25v onFri, 08/17/2018 - 17:29

You may (and it is highly recommended) place a fuse in each phase between the variable transformer and the load. On the models listed the ouputs are terminals #3 on the three coils.

One other caution:

These units should be connected to a Wye (3 hot wires, a neutral and a safety ground) source. If the transformer is connected to a delta source (no neutral) and the load becomes unbalanced one or two of the coils may be damaged due to a voltage shift on the coils. Fusing cannot protect from this problem.