Product Description

Model Number Interpretation

• 2 = Standard industrial drive series

• GU = GP‑2000 series, 460 VAC class

• 41020 = 4 = 460 VAC; 1020 = 20 HP; 20 = hardware version

Technical Specifications

• Motor Power: 20 HP (15 kW), 21.5 kVA

• Input Voltage: 460 VAC ±10%, three‑phase, 50/60 Hz

• Output Voltage: 0–460 VAC, three‑phase

• Output Frequency: 0–400 Hz

• Max Input Current: 32.7 A

• Continuous Output Current: 27 A

• Control Mode: Open‑loop V/F (Volts‑per‑Hertz)

• Protection: Overcurrent, overvoltage, undervoltage, overtemperature, short‑circuit, ground fault

• Enclosure: NEMA 1 (indoor)

• Ambient Temp: 0 °C to +45 °C

• Dimensions (H×W×D): approx. 500 × 279 × 277 mm

• Weight: approx. 25 kg

• Certifications: UL, IEC

Interface & Communication

• Power Terminals: 3‑phase input, motor output, DC bus braking

• Control Terminals: ±10 V analog input (speed reference), 24 VDC digital I/O (start/stop, fault reset, jog)

• Communication: Reliance proprietary protocol; no standard fieldbus

• Operator Interface: Built‑in keypad + 7‑segment display (parameters, fault codes)

• Encoder Interface: None (open‑loop only)

Core Functions

• Stable V/F speed regulation for 20 HP three‑phase motors

• Energy savings on variable‑torque loads (fans, pumps)

• External braking resistor support for fast deceleration

• Real‑time monitoring and fault code logging

• Adjustable accel/decel times, current limit, I/O logic via keypad

Applications

• Light industry: conveyors, packaging machines, assembly lines

• HVAC & process: medium‑size fans, pumps, agitators

• Material handling: 20 HP AC motor‑driven conveyors/hoists

• Legacy automation: direct replacement for GP‑2000 series drives

Usage & Maintenance

• Install in ventilated cabinet; ≥50 mm clearance around drive

• Use shielded cables for power/control; torque terminals properly

• Verify input voltage before power‑up; energize control first, then main

• Set parameters per motor nameplate (V, I, base frequency)

• Quarterly inspection: terminals, dust, overheating signs

• Before maintenance: disconnect all power; wait 5 minutes for DC bus discharge