Getting 47N trips when on generator but never on utility.
Getting 47N trips when on generator but never on utility.
(OP)
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.





RE: Getting 47N trips when on generator but never on utility.
What are you measuring with the Dranetz - voltage THD?
How well balanced is the load?
RE: Getting 47N trips when on generator but never on utility.