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thanks. so if there are no relays or breakers, would it make sense to just have the transformer solidly grounded/

I have a 13.2kV-4.16kV delta-wye transformer application that I am questioning whether to add low resistance grounding to. The transformer is fed by 13.2kV switchgear via a fused load-break switch (xfmr primary fuse). On the 4.16kV side, the transformer feeds another set of load-break...

vandal06, would what I have shown, Z1 = 6.890 R + j 30.173 X, be considered as %R+j%X, or do I need to convert it?

I am unsure how to enter this utility information (below)correctly within ETAP v6. Can someone please advise? ETAP asks for percent R and X, but I have what is shown below. Also, would I enter it as 13.2kv or 480V? Thanks "This location is served from XXXX substation via 13.2 kV Feeder...

I have a code question. What are the related NEC code rules associated with wiring multiple single phase circuits to a single 3-phase breaker? I have five 10 amp single phase loads I want to feed from a single 30A three phase breaker.

I have a client that has a 2400V distribution voltage (fed from 3 phase, delta-delta, 3 wire transformers). I need to use this feed to feed a 480V motor, hence fed from a transformer. My question is, if the 2400V is delta, 3-wire, can I use a 2400V-480/277V delta-Wye or 2400V-480/240V...

I am looking for fuse curves (melting, clearing, let through, etc.) for ABB Type CIL(5500 V) and CLC(3000 V) capacitor fuses, or data from similar type fuse. Thanks

Can someone tell me what year ANSI C37.5 and ANSI C37.01 were used for ratings of high and medium voltage circuit breakers? I don't have the standards handy.

mpparent, thank you and everyone else for their responses. Would I model this in SKM as two separate breakers, i.e. a "PE" and a "G" breaker?

I've got information given to me off of a 480V MCC main breaker as a Square D PEG-16 1600A with ground fault pickup/delay settings with 'amp X rating plug' and short time pickup settings I need to find time-current curve info for this breaker for coordination using SKM PowerTools.

Thanks for the quick response. I've got both 5-HK-250 and 5-HK-350 class breakers.

Can anyone tell me where to find interrupt rating data for ITE 5kv HK model breakers?