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I used to work for a utility that used both GE and Ohio Brass arresters at this voltage.

Using your delta/star transformer you have only two ways to lower the phase-gnd fault current on the secondary side of the transformer. By either grounding the transformer through a resistance or reactance. Just a note - this will not do anything to the three phase fault levels.

Our company uses transformer oil containment pits for transformer oil spill containment. We have a sump pump in the pit to pump out rain water, but we would not want to pump oil. We use the transformer oil level gauge contact and an auxiliary AC relay to disable the sump pump. I would be...

cephus, My company will not allow an individual to hold an engineering position unless they have a BSEE or a BSEET with PE registration. Even if you succesfully pass the FE and are considered by the state an Engineer In Training (EIT) my company will not allow a BSEET to hold an engineer...

I am wondering how many companies differentiate between a BSEE degree and a BSEET degree. My present employer does not allow individuals with a BSEET degree to hold an engineering job unless they have a PE. Even if the BSEET is from a ABET accredited program. Any feedback would be greatly...

Take a look at the LJ relay from Relay Associates. http://www.relayassociates.com/relay.htm

Because of possible Aux CT saturation and the high burden placed on the CTs by the electromechanical relays.

I would like to use an auto-transformer auxiliary CT with electromechanical relays for ground differential protection on a delta-wye resistor grounded transformer. The CT on the neutral is 200/5 and 2000/5 on the low side of the transformer. I need 10:1 ratio on the auto-transformer. I am...