The SX460 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. This model supercedes the Series 6 range.
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Stamford AVR SX460 | Original
Features include:
- Stability adjustment
- Under frequency roll off adjustment
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Leroy Somer AVR
Leroy Somer AVR R438 | Original
0 out of 5(0)Fuse: F1on X1,X2.10A;slow-250V
- Voltage sensing : 5 VA isolated via trans- former • 0-110 V terminals = 95 to 140 V • 0-220 V terminals = 170 to 260 V • 0-380 V terminals = 340 to 520 V for other voltages, a transformer should be used.
- Voltage regulation ± 0.5%
- Normal or rapid response time via jumper ST2 (see below)
- Voltage adjustment via potentiometer P2 or apply a DC voltage of ± 1 V on the terminals of the external potentiometer
- Current sensing: (parallel operation): input S1, S2 intended for 1 C.T. Š 2.5 VA cl1, secondary 1A (optional)
- Quadrature droop adjustment via potentio- meter P1
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SKU: R438 -
AVR | Generic Replacements
AVR SX440 | Generic Replacement AS440
0 out of 5(0)INPUT
Voltage: 190 – 264V ac
Frequency: 50-60 Hz nominal. Phase:1 Wire: 2
OUTPUT
Voltage: max 90V dc at 207 V ac input
Current: continuous 4A dc
Intermittent 6A for 10 secs
Resistance: 15 ohms minimum
REGULATION: +/- 1%
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SKU: Sx440G$41.89$48.18 -
AVR | Generic Replacements
AVR SX460 | Generic
0 out of 5(0)Sensing Input
Voltage: 95 – 132 VAC or 190 – 264 VAC
1 phase, jumper selectable. Frequency 50/60 Hz, selectable
Output
Voltage: Max. 90 VDC @ 207 VAC
Current: Continuous 4A
Intermittent 10A for sec
Resistance: Min. 15 ohm
Voltage Regulation:< ± 1.5 % ( with 4% engine governing)
Voltage Build-Up: Residual voltage at AVR terminal > 5 VAC
Thermal Drift: 0.05% peer C change in AVR ambient.
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SKU: SX460G$23.99$28.48 -
AVR | Generic Replacements
AVR R448 | 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 (1 sec) for ± 20% voltage variation or Rapid (0.3 sec) for ± 20% voltage variation
- Remote voltage adjustment range of: ± 5%
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SKU: R448G$84.69$97.60








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