AVR R438

LEORY SOMER AVR R438:
1.R438 description:

R438 can be powered by APER OR PMG field excitation system. the circuitry of R438 provides closed loop control of the generator output voltage by regulating the exciter field current.
 

2.R438 Characteristics

Voltage regulation ±0.5%
Short circuit capability:3Xlrated for 10 seconds (AREP or PMG excitation)
Voltage sensing:
 95 to 140 volts (50/60 Hz) or
 170 to 260 volts (50/60 Hz) or
 340 to 520 volts(50/60 Hz)
Response time:
Normal(1 sec) for ±20% voltage variation
or Rapid (0.3sec)for ±20% voltage variation
Remote voltage adjustment range of:±5%