Installation Guide

2022.02 / l
5
Electric Power Generation
Installation and maintenance
R120
AVR
5243 en -
3 - TECHNICAL SPECIFICATION
1) Sensing input
- Voltage: 277 VAC ± 10% for 1-phase,
415 VAC line-to-line ± 10% for 3-phase,
2-line sensing. The AVR senses the true
average of the line-to-line waveform. Use
the resistor (SMD) network for trouble-free
sensing and control of sensed voltage/
regulation.
2) Input power
- Voltage: 277 VAC rms ± 10%
- Frequency: 50/60 Hz
3) Output power
- Voltage: 95 VDC for 240 VAC Input
- Current:
• 4 A DC
• 6 A for 30 sec. (when allowed by the eld
resistance)
4) Operating temperature: -20ºC to +70ºC
5) Storage temperature: -40ºC to +80ºC
6) Voltage setting: min ± 10% of rated
voltage.
7) Stability setting: can be adjusted to obtain
a correct transient response in steady state.
8) Under frequency roll-off setting: available
below 46 Hz for 50 Hz and below 56 Hz for
60 Hz.
9) Voltage build-up: 2 Volts (L-N)
10) Voltage regulation: ± 1% at the AVR
terminals with a THC <5%.
11) Thermal drift: ± 1% for 30ºC change in
temperature.
12) Response time: less than 50 ms.
13) Closed loop response: typically 0.5 sec
to recover 98% of the dened voltage for a
eld forcing ratio of 1:2.
14) Sensing loss protection: the voltage
should disappear when the sensing circuit is
open.
15) Overexcitation protection set point:
85 VDC.
16) Protection fuse: 4 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) Sensing loss indicator: LED provided
(SL).
20) Overexcitation indicator: LED provided
(OE).
21) Protection on the devices: suitable R-C
snubber to be provided for the device used
to protect against voltage surges.
22) Potting/Encapsulation details: the
components on the AVR should be
completely encapsulated with suitable PU
resin compound to absorb transients/
vibrations during operation.
23) Alternator excitation details: (typical)
- Full load:
• Excitation voltage: 40 to 50 V
• Excitation current: 2.5 to 4.0 A
24) Terminal marking: see diagram
25) Dimensions:
- Overall: 104 x 94 x 40 (mm)
- Mounting: 83 (mm)
- Mounting hole dia: 5.5 (mm)
26) Weight: 185 g