Product Description

Model Number Interpretation

• 2: Standard industrial drive series

• GU: GP‑2000 series, 460 VAC voltage class

• 42003: 4 = 460 VAC; 2003 = 3 HP; hardware revision 03

Technical Specifications

• Rated Motor Power: 3 HP (2.2 kW)

• Apparent Power: 5.1 kVA

• Input: 460 VAC ±10%, three‑phase, 50/60 Hz; max 6.4 A

• Output: 0–460 VAC, three‑phase; continuous 5.3 A, max 5.3 A; frequency 0–400 Hz

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

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

• Enclosure: NEMA 12 (dust‑tight, drip‑proof, IP54 equivalent)

• Ambient Temperature: -10 °C to +50 °C

• Dimensions (H×W×D): approx. 408 × 256 × 202 mm

• Weight: approx. 14 kg

• Certifications: UL 508C, CE, IEC 61800‑5‑1, CSA certified

Interface and Communication Configuration

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

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

• Communication: Reliance proprietary protocol; no standard fieldbus (e.g., Modbus, Profibus)

• Operator Interface: Built‑in keypad with 7‑segment LED display (4‑digit + 2‑digit) for parameter setup, status monitoring, and fault code readout

• Encoder Interface: None (open‑loop control only)

Core Functions

• Stable V/F speed regulation for 3 HP three‑phase AC motors

• Energy saving for variable‑torque loads (fans, pumps)

• Electronic reversing: reverse from any motor speed without contactors

• Automatic/manual torque boost for heavy starting loads

• Three preset speeds selectable via digital inputs

• Adjustable current limit: 50–100% of rated output current

• 57 password‑protected programmable parameters; non‑volatile memory retains settings during power loss

• Real‑time status monitoring and fault code logging for quick diagnostics

• Compatibility with external braking resistors for rapid deceleration

• Built‑in RFI/EMI filters for reduced electrical interference

Application Scenarios

• Light & medium industry: Small conveyors, packaging machines, assembly lines, mixers, extruders

• HVAC & process: Medium‑sized fans, water pumps, cooling towers, agitators

• Material handling: 3 HP motor‑driven conveying, lifting, and hoisting equipment

• Legacy automation: Direct replacement for GP‑2000 series drives in existing systems

Usage and Maintenance Instructions

• Install in a well‑ventilated cabinet; maintain minimum 50 mm clearance around the drive for heat dissipation

• Use shielded cables for power and control wiring; tighten all terminals to specified torque

• Verify input voltage before powering on; energize control circuit first, then main power

• Set parameters per motor nameplate (voltage, current, base frequency, overload)

• Quarterly maintenance: Inspect terminals for looseness or overheating, clean internal dust, check cooling fan operation

• Before inspection/service: Disconnect all power and wait 5 minutes for DC bus capacitors to fully discharge

• Avoid operating in condensing humidity or corrosive environments; keep ambient temperature within -10–50 °C