Half circuits don't work

Status
Not open for further replies.
hurricane ike aftermath

hurricane ike aftermath

my church's 480volt-3 phase delta system is getting only 250v- 280v on one phase would that voltage situation damage our 208y/120 75kva transformer in our lighting panel? I need a response A.S.A.P. Thank You
 
whitehorse2k said:
my church's 480volt-3 phase delta system is getting only 250v- 280v on one phase would that voltage situation damage our 208y/120 75kva transformer in our lighting panel? I need a response A.S.A.P. Thank You
Click to expand...
Possibly. My guess is you have an open phase conductor from the utility, and the voltage you're reading is coming from the two intact phases through the transformers.
 
ce2two

ce2two

No dis -respect ,but i use wiggys on street lighting problems ....I use a fluke D.V.M. for every thing else ,digital only, strickley for an exact reading ,you might have your meter on a 120 volt ckt. yet your D.V.M. will read read any thing in between 0-120v,your wiggy gives 0 or 120v.nothing in between ....your wiggy will leave you guessing what voltage are you getting?
 
ce2two said:
No dis -respect ,but i use wiggys on street lighting problems ....I use a fluke D.V.M. for every thing else ,digital only, strickley for an exact reading ,you might have your meter on a 120 volt ckt. yet your D.V.M. will read read any thing in between 0-120v,your wiggy gives 0 or 120v.nothing in between ....your wiggy will leave you guessing what voltage are you getting?
Click to expand...
Most troubleshooting does not require knowing the exact voltage, and I can certainly tell the difference between 60v and 120v with mine.

A high-input-impedance DVM will not eliminate false readings due to induced voltages in wires that are not genuinely energized.
 
Status
Not open for further replies.
Top