MODULE VOLTAGE R448 AVR GENERATOR FOR AUTOMATIC REGULATOR, US $115.43 – Picture 0

MODULE VOLTAGE R448 AVR GENERATOR FOR AUTOMATIC REGULATOR, US $115.43 – Picture 1

Module Voltage R448 Avr Generator For Automatic Regulator

US $115.43

Shanghai, China
Jan 30th

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AUTOMATIC VOLTAGE REGULATOR MODULE AVR R448 FOR GENERATOR WEINTEK HMI MT6100I TOUCH SCREEN BRAND NEW FAST SHIPPING 1PC NEW KEYENCE FIBER OPTIC SENSOR FU-58 NEW DIGITAL CONDUCTIVITY SALINITY METER TESTER DDS-307 NEW AUTOMATIC SEEDS COUNTER SLY-C FOR VARIOUS SHAPES SEEDS GRAIN NUT.... Introduction: For both AREP&PMG excitation systems, the alternator voltage regulator is the R448. With AREP excitation, the R448 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. With PMG excitation, a permanent magnet generator (PMG) added to the alternator supplies the AVR with voltage which is independent of the main alternator winding. This is fitted at the rear of the machine and connected to the R448 AVR, and the ST9 jumper must be disconnected. These two principles provide the machine with a short-circuit current capacity of 3 IN for 10 s, and good immunity to distortions generated by the load. The AVR monitors and corrects the alternator output voltage by adjusting the excitation current. In SHUNT excitation, R 448 AVR.is supplied by main windings (140V - 50/60 Hz) to X1, X2. 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 45%, 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 to increase the applied load possible for one speed variation (turbo-charged engine). To avoid voltage oscillations, the trip threshold for the LAM function shoulder set approximately 2 Hz below the lowest frequency in steady state. It is advisable to use the LAM at 25% for load impacts? 70% of the genet rated power. LAM, action eliminated by cutting the ST5 jumper. During load impacts, the function helps the genet 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 50 Hz, the rated voltage follows a fast gradient as it is restored. If the speed drops below 46 Hz, since the engine needs more help, the voltage follows a slow gradient as it returns to the reference value. The new functions of the R448 are: -Parallel operation between alternators with C.T. -Parallel operation with the mains with C. T. and R 726 module. -3-phase sensing (R 731 module). -LAM function integrated in the R 448 AVR. Main characteristics: Shunt power supply: max 150V - 50/60 Hz. Rated overload current: 10A - 10s. Fuse: F1 on X1, X2. 10A; 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 jumper ST2. 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. ?2.5 VA cl1, secondary 1A (optional). Quadrature droop adjustment via potentiometer P1. Max. Excitation current adjustment via P5: 4.5 to 10A. 50/60 Hz selection via ST3 jumper. ST11: Knee-point at 65 Hz for tractable application and variable speed. R448 for alternators LSA 42.2, 43.2, 44.2, 46.2,47.2, 49.1. R448 V50 for alternator LSA 50.2. Compatible with the SHUNT, AREP or PMG excitation system. wwhcdkj sijpidk eajiieg MPI 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.