esee135
Electrical
- Apr 27, 2005
- 57
I have a couple of old Brown Boveri Voltage regulators (the old switch blade, swiss watch looking squares).
Does anyone know how the ratings are specified on these AVR's?
NAMEPLATE:
NR B73817 Type AB4/1
110V 8.01ohms
30/13A 60Hz
VA 071949/1
What does the 30/13A mean? I think 13A is the pilot field current in the rotating exciter when the AC generator is operating at rated load and power factor. Does the 30A refer to a forcing value? I didn't think forcing was available on this vintage of AVR.
Does anyone know how the ratings are specified on these AVR's?
NAMEPLATE:
NR B73817 Type AB4/1
110V 8.01ohms
30/13A 60Hz
VA 071949/1
What does the 30/13A mean? I think 13A is the pilot field current in the rotating exciter when the AC generator is operating at rated load and power factor. Does the 30A refer to a forcing value? I didn't think forcing was available on this vintage of AVR.