Introduction: Fuji Electric was founded in 1923 and is headquartered in Tokyo, Japan. It is one of the Japanese heavy motor manufacturers that mainly produces large electrical machines. The company has a wide range of products, including drive controllers/uninterruptible power supply products: high voltage frequency converters, medium and low voltage frequency converters, servo systems, and uninterruptible power supplies (UPS); Automation and instrumentation products: human-machine interface, programmable controller, temperature controller, recorder, controller, pressure, differential pressure, liquid level transmitter, ultrasonic flowmeter, gas analyzer; Low voltage/medium high voltage electrical products: AC contactors, AC switches, AC adjusters, molded case circuit breakers, residual current circuit breakers, FePSU circuit breakers with detection and metering functions, low-voltage air circuit breakers, motor starters, circuit protectors, miniature circuit breakers, components for AC contacts, button switches, selector switches, control relays, terminal blocks, automatic power adjusters, power management machines, digital multifunctional relays, AS interface equipment, medium high voltage transmission and distribution equipment, indicating electrical measuring instruments, and variable devices for low-voltage measuring instruments.