AVR R438 | Generic Replacement
Fuse: F1on X1,X2.10A;slow-250V
- Voltage regulation ±0.5%
- Short circuit capability: 3 x Irated 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 (1sec) for _+20% voltage variation or rapid (0.3 sec) for ∼+20% voltage variation.
- Remote voltage adjustment range of: _+5% *1000 Series alternators do not have PMG option. 2 Year Warranty!
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$66.50
The R438 is a generic replacement Automatic Voltage Regulator (AVR) for Leroy Somer brushless generators, compatible with AREP or PMG excitation systems. It accepts a 3-phase power input of 40–50V AC, with voltage sensing available at three selectable ranges: 95–140V (50/60 Hz), 170–260V (50/60 Hz), or 340–520V (50/60 Hz).
The R438 delivers a maximum output of 160V DC at 120V AC input, with a maximum current of 8A. Minimum field resistance is 15 ohms. Voltage regulation accuracy is ±0.5%. Short circuit capability is 3× rated current for 10 seconds (with AREP or PMG excitation). Rated overload current is 8A for 10 seconds.
Response time is 1 second (normal) or 0.3 seconds (rapid) for a ±20% voltage variation. Remote voltage adjustment range is ±5%. Internal fuse protection (F1 on X1, X2) is rated at 8A slow-blow, 250V. Operating temperature range is -40°C to +70°C.
Additional information
| Weight | 1.75 oz |
|---|---|
| Dimensions | 8 × 8 × 4 in |
| BRANDS | Power Master Inc. |
