We are getting wrote up for hooking up lightning arresters wrong. The engineer wants the bottom to go to the pole ground. All 3 straight to pole ground. The old way was to hook 3 together, than take each one to the system neutral. What are your thoughts. Thank you, Bob
We are upgrading a old service, OH to URD. New service is 2 phase 14.4 in a fiberglass transcloser. Primary URD is in 2 pipes,schedule 80 pvc. Transformers are on a concrete pad, 6" with rebar. Will we have trouble with eddy currents, because of the rebar in the concrete? Thank you, Bob
Meterman and ape. changed a 480 volt meter at a water well. It is a 3 Ø 240/480 center grounded delta on the low side. High side is 14,400. Lineman grounded the high side before opening the cutouts. My question is when they closed the fuses in, they closed the 2 outside fuses in first. The...
We had a bad regulator on a primary line. Voltage is 7.2, the fault indicators did not work. The indicators are Linam 100 amp trip, made by Chance. The lineman put the indicators on both sides of the regulator, showed white. Disconnected regulator, tried the OCR, and it closed right in and held...
3- 167 KVA transformers, they are hooked up wye-wye. 14.4 Ø to grd. This goes to a reda pump. They want 2500 volts Ø to Ø on the secondary. We have 2500 volts c to b, 1445 a to b,1445 a to c. 1445 Ø to grd. on a,b,and c. The 3 phases were all hot, polarity was the same. H2 was grounded. Anyone...
My background, I'm a superintendent for a REC in NW Oklahoma. We recently built a new 3 Ø line, 1/0 acsr. This is for a 2 way feed between the Fargo substation and the Gate substation. It would not phase in, 30 degrees angular displacement. Ø to Ø voltage is North Ø to North Ø 7200 volts, North...
