2018.01 / a
5
Electric Power Generation
Installation and maintenance
R121
AVRs
5657 en -
3 - TECHNICAL SPECIFICATION
1) Sensing input and Input power
- Voltage: 90 V to 277 VAC ±10%, 50/60 Hz
2) Output power
- Voltage:
• 95 VDC at 220 VAC Input
• 50 VDC at 90 VAC
- Current:
• 6 A DC
• 8 A for 30 sec. (when allowed by the field
resistance)
3) Operating temperature: -20ºC to +70ºC.
4) Storage temperature: -40ºC to +80ºC.
5) Voltage setting: min ± 10% of rated
voltage.
6) External potentiometer voltage setting:
min ± 15% of rated voltage with 2 K
potentiometer.
7) Stability setting: can be adjusted to obtain
a correct transient response in steady state.
8) Under frequency roll-off setting: available
below 48.5 Hz for 50 Hz and below 58.5 Hz
for 60 Hz.
9) Voltage build-up: 2 Volts (U-N).
10) Voltage regulation: ± 1% at the AVR
terminals.
11) Thermal drift: ± 1% for 30º C change in
temperature.
12) Response time: less than 50 ms.
13) Closed loop response: typically 0.5 sec
to recover 97.5% of the defined voltage for a
field forcing ratio of 1:2.
14) Sensing loss protection: the voltage
should disappear when the sensing circuit is
open.
15) Overexcitation protection: 95 VDC.
16) Protection fuse: 6.3 A, 240 VAC.
17) Potentiometer sealing: except for the
V-trim potentiometer, all potentiometers are
sealed.
18) Frequency roll-off indicator: LED
provided (UF).
19) Overexcitation indicator: LED provided
(OE).
20) Protection on the devices: suitable R-C
snubber to be provided for the device used
to protect against voltage surges.
21) Dimensions:
- Overall: 105 x 96 x 38 (in mm)
- Mounting: 83 (in mm)
- Mounting hole dia: 6 (in mm)
22) Weight: 185 g.
