The AS440 ( + Kit replaces SX440 ; SA465) is a half-wave phase-controlled thyristor type Automatic Voltage Regulator and forms part of the excitation system for a brushless generator. In addition to regulating the generator voltage, the AVR circuitry includes underspeed and sensing loss protection to ensure safe, reliable control of the generator.
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Stamford AVR AS440 | Original
Features include:
- Stability adjustment
- Optimum response selection
- Under frequency roll off adjustment
- Droop adjustment
- Trim adjustment
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0 out of 5(0)- EXACT GENERIC REPLACEMENT – 1 Year Warranty
- Sensing Input: Terminal 1,2 3,4 5,6 Can be connected to Y or 220~480VAC Single Phase 50/60HZ.
- Power Input:50~280VAC (1,2) 50/60HZ.
- Output Voltage: Maximum 90VDC @ 220VAC Harmonic Wave.
- Output Current: Continuous 6A Maximum 8A for 10 sec.
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Leroy Somer AVR
Leroy Somer AVR R449 | Original
0 out of 5(0)The regulator includes:
- A main terminal strip (10 terminals)
- A secondary terminal block (5 terminals)
- A frequency selection terminal block (3 terminals) – A quadrature droop potentiometer
- A voltage potentiometer
- A stability potentiometer
- A maximum excitation potentiometer
- A sensing selection jumper ST1 (single/3-phase with an external module)
- A response time jumper ST2 – A frequency selection jumper ST3 – An external voltage setting jumper ST4 – A LAM (load adjustment module) jumper ST5
- From R449 Version E number 10,000, this jumper will be removable.
- A selecti
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SKU: R449 -
AVR | Generic Replacements
AVR R230 | Generic Replacement R250
0 out of 5(0)- Voltage regulation: around ± 0.5%.
- Voltage supply/sensing range 85 to 139 V (50/60 Hz)
- Rapid response time (500 ms) for a transient voltage variation amplitude of ± 20% – Voltage setting P1
Stability setting P2. - Power supply protected by 8 A fuse, slow- blow action (tolerates 10 A for 10 s)
- Frequency: 50 Hz with ST3 jumper
- 60 Hz without ST3 jumper
- Factory-set underspeed protection P3. 2.2
- R230 AVR option
- Potentiometer for remote voltage adjustment, 1000 Ω / 0.5 W min: adjustment range ± 5%. – Remove the ST4 jumper.
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AVR | Generic Replacements
AVR R438 | Generic
0 out of 5(0)- 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.
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SKU: R438G$74.69$87.70








AVR R448 | Generic









