Device BE3-47N. tripping when set for 10%, never trips when set for 15% DRANETZ reports 1% or less. Waveform has flat spot at at zero crossing. Two devices do exact same thing. I think Specifying engineer has too tight a value. Any ideas. Load is a data center and building mechanical. Happens on primary and alternate generator. New CATS.
Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
Getting 47N trips when on generator but never on utility.
- Thread starter CBGUY
- Start date
- Thread starter
- #3
I am not the lead guy. They are all saying that the Basler relay should not react to 8% THDV. I saw the scope, it had weird zero crossing shifts, a flat spot between positive and negative at 180 degrees. The rest was normal switching power supply,etc along the rest of the sinewave.. Years ago this caused me big problems. I was told zero crossing shift was a big problem. I can't find info I read once, pre-internet.
- Status
Similar threads
- Question
- Locked
- Question
- Locked
- Question