The 38ER4060 is a compact, high-performance AC drive from the Reliance Electric GV3000 series, designed for three-phase induction motors. It supports both V/Hz and vector control modes, delivering precise speed and torque regulation for general-purpose and light industrial applications. The unit is discontinued new, with refurbished and surplus units widely used for maintenance and replacement in legacy automation systems.

38 denotes the GV3000 series and 460 VAC input voltage class. ER indicates the drive type with standard features and built-in keypad. 4060 represents the power rating and current specification, corresponding to 3.8 A continuous current at 460 VAC.

Three-phase input voltage is 380–460 VAC ±10% at 50/60 Hz. Rated output current is 3.8 A, with a maximum output frequency of 0–200 Hz. It operates at 2 kHz carrier frequency, supporting both V/Hz and vector regulation. Speed regulation ratio reaches 1:600 with a 1024 PPR encoder. The enclosure is IP20 (bookshelf type) with forced-air cooling. Dimensions are approximately 320 mm in height, 150 mm in width and 200 mm in depth, weighing about 5.7 kg (12.5 lb). It meets UL and CE standards with an operating temperature range of 0–40°C.

Main circuit terminals include L1, L2, L3 for AC input and U, V, W for motor connection. Control terminals provide 24 VDC power, 5 programmable digital inputs, 1 digital output, 1 analog input (±10 VDC / 4–20 mA) and 1 analog output (0–10 VDC / 4–20 mA). The front panel has a built-in keypad and LED display for parameter setup and status monitoring. It supports RS-232 communication for external control and data logging.

It offers selectable V/Hz and vector control for flexible motor regulation. Adjustable acceleration/deceleration rates and PID control ensure smooth operation. Comprehensive protection includes overcurrent, overvoltage, undervoltage, overtemperature and short-circuit protection. It features a speed regulation ratio of 1:600 and torque response of 180–220 Hz for high precision.

It is suitable for light-duty industrial equipment such as conveyors, fans, pumps and small machine tools. It is commonly used in legacy production lines requiring precise AC motor control. It serves as a direct replacement for outdated GV3000 drives in automation systems.

Install the drive vertically in a clean, dry and well-ventilated cabinet, reserving 100 mm clearance around for heat dissipation. Separate power and control cables during wiring and tighten all terminals securely. Before powering on, verify input voltage and set parameters according to the motor nameplate. Conduct quarterly maintenance to clean dust from the heat sink and fan, inspect terminals and keypad functionality. Disconnect all power and wait for capacitors to discharge before servicing.