M-476

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M-476 stands for Motor/Generator Automatic Voltage Regulator, which is an electronic regulator, which controls the field excitation of a synchronous generator in order to properly regulate its output voltage. It is suitable for both single and three phase machines with a range of output voltages up to 690 volts.The M-476 is designed for use in high-reliability environments such as hospitals, military installations, chemical plants, traffic control systems, and may be used as a stand-alone voltage regulator or integrated into a larger Automatic Voltage Regulator (AVR) system. It is suitable for applications in industrial, agricultural, and domestic use.The M-476 Generator Automatic Voltage Regulator is installed inside the generator control cabinet, usually directly above the generator excitation components. The M-476 takes input from the existing AVR and uses the rectifier and inverter circuit to provide power to the field winding of the generator. The M-476 Generator Automatic Voltage Regulator features advanced control and diagnostics capabilities, which make it ideal for applications where maximum performance and reliability are essential.The M-476 Generator Automatic Voltage Regulator is capable of providing a wide range of output voltages from 300 to 690 volts. The regulator can be adjusted in voltage increments of 5 volts with a maximum output regulation of ±3%. The operating frequency is adjustable from 20 to 100 Hz. Other features of the M-476 include adjustable start-up and shut-down times, adjustable voltage tolerances, adjustable load current limit, and adjustable overcurrent limit.The M-476 Generator Automatic Voltage Regulator utilizes a static voltage regulator to produce the desired output voltage. The static voltage regulator works by varying the excitation current through the generator’s field winding to produce the desired output voltage.The M-476 utilizes a sensing resistor to measure the output voltage. The sensed voltage is then compared to the setpoint voltage, and the excitation current is adjusted accordingly in order to maintain the setpoint output voltage. The M-476 also incorporates a number of protection features to protect the generator against over-current, over-voltage, and over-temperature conditions.The M-476 Generator Automatic Voltage Regulator is a highly reliable and rugged piece of equipment. Its advanced electronic design and sophisticated diagnostic features make it ideally suited for use in applications where maximum performance and reliability are essential.

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