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AVR R438 Automatic Voltage Regulator For Generator of Leroy Somer

Leroy Somer
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Key Features

  • 100% Brand New And High Quality.
  • The R438 voltage regulator module can be powered by AREP or PMG field excitation system
  • Detection input: Voltage 95-480V AC; Power supply input: Voltage 40-150V AC three-phase for this automatic voltage regulator
  • Material: metal and plastic material voltage regulator, lightweight, tough and durable, can be used for a long time
  • Magnetic field output: when voltage input is 120V AC, max is 160V DC, max 10A for this brushless generator AVR
  • 95-480V automatic voltage regulator is a must-have item for your brushless generator
  • We are confident the quality of our product is 100% qualified. If there is any question, feel free to contact us. We will offer the best service for you. Thank you!
  • Click Here To Download R438 User Manual

₨ 40,000.00 ₨ 50,000.00

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AVR R438 Automatic Voltage Regulator For Generator of Leroy Some

Buy Leroy Somer AVRs Diode/Rotating Assemblies in Pakistan. You can buy the AVR R438 Automatic Voltage Regulator of Leroy Somer online anywhere from Pakistan or by visiting Electronic Power House (EPH)andTetralink Technologies (TLT) in Lahore. We are the main distributor of Leroy Somer AVRs in Pakistan. We have all original Leroy Somer AVRs always ready in stock. All international & local brands of generator controllers are also available at very reasonable and best prices in Pakistan.

Key Features of AVR R438

  • 100% Brand New And High Quality.
  • The R438 voltage regulator module can be powered by AREP or PMG field excitation system
  • Detection input: Voltage 95-480V AC; Power supply input: Voltage 40-150V AC three-phase for this automatic voltage regulator
  • Material: metal and plastic material voltage regulator, lightweight, tough and durable, can be used for a long time
  • Magnetic field output: when voltage input is 120V AC, max is 160V DC, max 10A for this brushless generator AVR
  • 95-480V automatic voltage regulator is a must-have item for your brushless generator
  • We are confident the quality of our product is 100% qualified. If there is any question, feel free to contact us. We will offer the best service for you. Thank you!

General description

For both AREP & PMG excitation systems, the alternator voltage regulator is the R438. With AREP excitation, the R438 electronic AVR is powered by two auxiliary windings which are independent 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 transistor. This principle ensures that regulation is not affected by distortions generated by the load.

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brands

Leroy Somer
color

Black

Technical Specifications

– Storage : -55?C ; +85?C
– Operation : -40?C ; +70?C
– Standard power supply: AREP or PMG.
– Rated overload current: 8 A – 10 s
– Electronic protection (overload, shortcircuit on opening of voltage sensing circuit): excitation overload current for 10 seconds then return to approximately 1A. The alternator must be stopped (or the power switched off) in order to reset the protection.
– Fuse : F1 on X1, X2. 8A ; slow – 250V
– Voltage sensing : 5 VA isolated via transformer ;
? 0-110 V terminals = 95 to 140 V,
? 0-220 V terminals = 170 to 260 V,
? 0-380 V terminals = 340 to 520 V.
– Voltage regulation ? 0.5%.
– Normal or rapid response time via ST2 jumper (see below).
– Voltage adjustment via potentiometer P2. other voltages via adapter transformer
– Current sensing (parallel operation): C.T. 2.5 VA cl1, secondary 1 A (optional).
– Quadrature droop adjustment via potentiometer P1.
– Max. excitation

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