AUTOMATIC VOLTAGE REGULATOR MODULE AVR R438 FOR GENERATOR, US $67.48 – Picture 0

AUTOMATIC VOLTAGE REGULATOR MODULE AVR R438 FOR GENERATOR, US $67.48 – Picture 1

Automatic Voltage Regulator Module Avr R438 For Generator

US $67.48

Shanghai, China
Jan 30th

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AUTOMATIC VOLTAGE REGULATOR MODULE AVR R438 FOR GENERATOR AUTOMATIC VACUUM SEALING SEALER PACKING MACHINE FOR MAXIMUM 500MM DZ-500 NEW SINGLE PUNCH TABLET PRESS PILL MAKING MACHINE MAKER TDP-5 SEMI-AUTO VERTICAL PLASTIC BAG BAND SEALING MACHINE SEALER FR-900 DC 48V TO AC 110V PURE SINE WAVE BRAND NEW 300W POWER INVERTER 1PC Introduction: 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 winding which are independent of the voltage match circuit. The first winding has a voltage in proportion to that of the alternator, the second have a voltage in proportion to the stator current. The power supply voltage is rectified and filtered before being used by the AVR monitoring transistor. This consists of a "PMG"(permanent generator).This is fitted at the rear of the machine and connected to the R438 AVR. The PMG supplies the AVR with constant voltage which is independent of the main alternator winding. As a result the machine has a short-circuit current capacity and good immunity to distortions generated by the load. The AVR monitors and corrects the alternator output voltage by adjusting the exitation current.50/60Hz selection via the ST3 jumper. The LAM system is integrated in the R438 AVR as standard. Role of the "LAM (load adjustment module)"On application of a load, the rotation speed of the generator set decreases. When it passes below the preset frequency threshold, the LAM causes the voltage to drop by approximately 13% or 25% and consequently the amount of active load applied is reduced by approximately 25% to 50%, until the speed reaches its rated value again. Hence the LAM can be used either to reduce the speed variation (frequency) and its duration for a given applied load, or the increase the applied load possible for one speed variation(turbo-charged engine).To lowest requency in steady state. During load impacts, the function help the genset to return to its rated speed faster thanks to a gradual increase in voltage according to the principle. If the speed drops between 46 and 50Hz, the rated voltage follows a fast gradient as it is restored. If the speed drops below 46Hz, since the engine need more help, the voltage follows a slow gradient as it returns to the reference value. Main characteristics: Voltage regulation +/-0.5% at steady state and constant speed. Phase to phase voltage sensing. Controls by transistor means the regulation quality is independent of load applied. Integrated "LAM" system to cope with increased loads applied to the engine. Suitable for high levels of vibration and harsh environments. The R438 is compatible with other modules giving additional functions. Standard power supply: AREP or PMG. Rated overload current: 8A-10s. Electronic protection(overload, short-circuit on opening of voltage sensing circuit excitation overload current for 10 seconds then return to approximately 1A). Fuse: F1 on X1, X2.8A; slow-250V. Voltage sensing: 5VA isolated via transformer. 0-110V terminals=90-140V. 0-220V terminals=170-260V. 0-380V terminals=340-520V. Voltage regulation +/-1%. Normal or rapid response time via ST2 jumper. Voltage adjustment via potentiometer P2. Current sensing (parallel operation): C.T. 2.5VA cl1, secondary 1A (optional). Quadrature drop adjustment via potentiometer P1. Max, excitation current adjustment via P5. Applications to Alternators: LSA 42.2, 43.2, 44.2. Compatible with the AREP or PMG excitation system. nmgf uwhu kbwl UAC Buyer should pay within 7 days after purchase. We only accept payment via PayPal. Our team focuses on providing high quality products with reasonable price and tries its best to keep transactions as simple as possible. Please be confident of and enjoy your shopping here! Please feel free to contact us via eBay message system or email.