Reliance Electric 1AC4103G
May 28, 2026

Reliance Electric 1AC4103G

The 1AC4103G is a 3HP (2.2kW) general‑purpose V/Hz AC variable‑speed drive from the Reliance Electric GP‑1200 series, designed for global use with 380–460VAC three‑phase input. It is a NEMA 1 enclosed model for indoor light industrial and commercial applications, originally released in the late 1980s. Now discontinued, it is commonly available as new old stock or refurbished units for legacy system replacement and maintenance.

Description

Product Description

The 1AC4103G is a 3HP (2.2kW) general‑purpose V/Hz AC variable‑speed drive from the Reliance Electric GP‑1200 series, designed for global use with 380–460VAC three‑phase input. It is a NEMA 1 enclosed model for indoor light industrial and commercial applications, originally released in the late 1980s. Now discontinued, it is commonly available as new old stock or refurbished units for legacy system replacement and maintenance.

Model Number Interpretation

  • 1: First‑generation GP‑1200 series platform

  • AC: AC variable‑speed drive

  • 4: 460VAC voltage class (380–460VAC for global version)

  • 103: 3HP power rating

  • G: Global version, 380–460VAC wide input range

Technical Specifications

  • Input: Three‑phase 380–460VAC ±10%, 50/60Hz; maximum input current 5.5A

  • Output: Three‑phase 380–460VAC; maximum output current 4.8A; rated capacity 3.9kVA

  • Power: 3HP (2.2kW) continuous

  • Control: Open‑loop V/Hz; speed ratio 20:1; output frequency 0–400Hz

  • Enclosure: NEMA 1, IP20 (indoor use only)

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

  • Ambient: 0–45°C, 5%–95% RH (non‑condensing)

  • Weight: Approximately 11.8kg

Interface and Communication Configuration

  • Power Terminals: L1/L2/L3 (three‑phase input), U/V/W (motor output), PE (protective earth)

  • Control Terminals: Digital inputs for start/stop, forward/reverse, fault reset; analog input 0–10VDC for speed reference; relay output for fault indication (250VAC/5A)

  • Communication: No onboard communication ports; hardwired control only

Core Functions

  • Open‑loop V/Hz control provides stable speed regulation for standard induction motors

  • Wide 380–460VAC input range accommodates global power grids

  • 0–10VDC analog speed input compatible with potentiometers and PLCs

  • Comprehensive electrical and thermal protection safeguards drive and motor

  • Direct drop‑in replacement for legacy 1AC series drives, ensuring compatibility with existing systems

Application Scenarios

  • Small conveyors, fans, pumps, mixers, and processing machinery with 3HP motors

  • Light manufacturing equipment and commercial ventilation systems

  • Retrofit and maintenance of older industrial and commercial AC drive installations

Usage and Maintenance Instructions

  • Mount vertically in a clean, dry, well‑ventilated indoor area with sufficient clearance for cooling airflow

  • Use rated copper conductors; separate power and control cables to minimize electromagnetic interference

  • Inspect all connections before power‑up; check terminals and wiring periodically for looseness or corrosion

  • Disconnect power before cleaning; use a dry cloth only—do not use liquids or chemical cleaners

  • Routinely monitor heat sinks and terminals for signs of overheating

  • Diagnose faults via onboard indicators; resolve all issues before restarting the drive

  • Avoid static electricity discharge; do not disassemble the unit without professional guidance

  • Store spare units in a cool, dry, dust‑free environment


Get a Quote