Overview
The Reliance Electric 1SU41020 is a SP500 VS Drive rated for 20 horsepower, the highest power tier in the SP500 series. This drive is part of the SP500 Series of ac pulse-width-modulated inverters, operating on 3 phase power input. The drive has a rated horsepower of 20.0 HP and is contained in a NEMA 1 or chassis style enclosure, with a rated voltage of 380-460 VAC.
Key Features
- Internal dc-to-dc power supply and IGBT inverter bridge for reduced acoustic noise
- Standard 4-character display, 6-key keypad, and status LEDs for user interface functionality
- Protections against overtemperature, overcurrent, short circuit, over/undervoltage, and ground fault
- PWM control method for smooth motor acceleration and deceleration
- IP20 equivalent enclosure rating
Technical Specifications
- Rated Horsepower: 20 HP
- Input Voltage: 380-460VAC
- Input Current: 32.7A
- Output Current: 27.0A
- Frequency: 50/60Hz
- Power Loss: 600W
- Enclosure Type: NEMA 1 or chassis style
- Dimensions (Enclosure D): 465.2 mm (18.31 in) H × 198.9 mm (7.83 in) D × 286.5 mm (11.28 in) W
- Weight: 15.3 kg (34 lb)
- Operating Temperature: 0° to 40°C
- Control Method: PWM (Pulse-Width-Modulation)
- UL Listed: Yes
- IEC Certified: Yes
Typical Applications
The 1SU41020 has the highest level of horsepower available to the SP500 drives, making it the optimal choice in systems where power demand is high and environmental hazard levels are low. Ideal for pump motors, compressor drives, conveyor systems, and general industrial machinery requiring precise speed control.
Compatibility & Replacements
Compatible With
- Three-phase AC motors rated up to 20 HP
- NEMA frame motors (1725–3600 RPM)
- Industrial control systems using 380-460VAC three-phase power
- Standard PLC and automation systems via discrete I/O signals
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The 1SU41020 is the flagship 20HP model in the SP500 series and may directly replace earlier SP500 configurations in the same enclosure class.
Works With
- Reliance Electric SP500 series documentation (Manual D2-3356-6)
- Standard industrial control protocols (hardwired discrete I/O)
- Motor overload protection relays and soft-starters
- Line reactors and harmonic filters (optional)
