We have purchased a Siemens SPS2 46kV breaker. We have a 125VDC trip circuit. Siemens lists the trip circuit draws 12A(Nom.) at 70-140VDC (125VDC Nom.). They Use a Square-D pushbutton (Class 9001 Type K-30 mm with type KA1 contact blocks) in their trip circuit to energize the trip solenoid in...
Historically, we have specified power xfmrs that are 55/65 Deg C rated (for U.S. use). My understanding is that this was an older designation used when the insulation was originally transistioned from the older 55 Deg C rating to the newer 65 Deg C rating. My questions are as follows:
1. It...
