The 2GU41020 is a 20 HP (15 kW) three-phase AC variable frequency drive belonging to Reliance Electric GP-2000 series. It is designed for general industrial motor speed regulation with 460 VAC power input. This drive is widely applied to fans, pumps, conveyors and material handling equipment. The model has been discontinued by the manufacturer, and refurbished units are mainly used for maintenance and replacement of legacy industrial systems.

2 represents the standard industrial drive series. GU stands for GP-2000 series and 460 VAC voltage class. 41020 indicates 460 VAC input, 20 HP rated power and hardware revision 20.

The rated motor power is 20 HP (15 kW) with apparent power of 21.5 kVA. The input voltage is 460 VAC plus or minus 10 percent, three-phase, 50/60 hertz. The maximum input current is 32.7 amperes. The output voltage ranges from 0 to 460 VAC in three-phase, and the output frequency ranges from 0 to 400 hertz. The continuous rated output current is 27 amperes. It adopts open-loop V/F control mode. Built-in protection functions include overcurrent, overvoltage, undervoltage, overtemperature, short-circuit and ground fault protection. It features NEMA 1 enclosure for indoor use. The operating ambient temperature is from 0 degree Celsius to 45 degree Celsius. The overall dimensions are approximately 500 millimeters in height, 279 millimeters in width and 277 millimeters in depth. The total weight is about 25 kilograms. The product complies with UL and IEC standards.

It is equipped with power terminals for three-phase main power input, motor output and DC bus braking connection. The control terminals support plus or minus 10 volt analog input for speed reference and 24 VDC digital input and output for start stop, fault reset and jog operation. It adopts Reliance proprietary communication protocol without standard fieldbus ports. The built-in keypad and seven-segment display are used for parameter configuration and fault code checking. There is no encoder interface, and the device only supports open-loop control.

It provides stable V/F speed regulation for 20 HP three-phase AC motors. It reduces power consumption for variable-torque loads such as fans and pumps. It works with external braking resistors to achieve rapid deceleration. Real-time operating status monitoring and fault code recording facilitate quick troubleshooting. Users can adjust acceleration time, deceleration time, current limit and input and output logic through the local keypad.

It is suitable for conveyors, packaging machines and assembly lines in light manufacturing industry. It can be matched with medium-sized fans, water pumps and agitators in HVAC and process industries. It is applicable to conveying and lifting equipment driven by 20 HP AC motors. It can serve as a direct replacement for outdated drives of GP-2000 series in legacy automation systems.

Install the drive inside a well-ventilated cabinet and reserve no less than 50 millimeters clearance around the unit for heat dissipation. Use shielded cables for power and control wiring and fasten all terminals firmly. Verify the input voltage before powering on. Energize the control circuit first and then the main power supply, and set relevant parameters according to the information on motor nameplate. Inspect wiring terminals and clean internal dust every quarter, and check for signs of overheating regularly. Disconnect all power supply and wait five minutes for DC bus capacitors to fully discharge before carrying out inspection and maintenance work.