AVR R438 Automatic Voltage Regulator for Diesel Generator


Availability: 19 in stock

**Genuine Alternative:** This is a high-quality aftermarket replacement for the Leroy Somer Genset AVR Voltage Regulator R438

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The 3-phase Generator AVR Automatic Voltage Regulator R438 AVR is powered by two auxiliary windings which are self-sufficient of the voltage match circuit, the first winding has a voltage in proportion to that of the alternator (characteristic shunt), the second has a voltage in proportion to the stator current (compound characteristic: booster effect). The power supply voltage is rectified and filtered before being used by the AVR monitoring transisitor.


AVR R438 Automatic Voltage Regulator for Diesel Generator


Voltage Regulation±0.5%
Remote voltage adjustment range±0.5%
Short circuit capability3 x Irated for 10 seconds
Standard power supplyAREP or PMG
Rated overload current8 A – 10 s
Voltage sensing5 VA isolated via transforme
0-110V terminals95 to 140V
0-220V terminals170 to 260V
0-380V terminals340 to 520V
Voltage regulation± 1%
Current sensingC.T.2.5VA cl1, secondary 1 A
Voltage sensing95~140 volts (50/60 Hz)
170~260 volts (50/60 Hz)
340~520 volts (50/60 Hz)
Fit for1000 series generator
2000 series generator
3000 series generator

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