Reliance Electric 1SU51005
The 1SU51005 is a 5HP (3.7kW) three-phase AC variable frequency drive (VFD) from the Baldor‑Reliance (now ABB) SP500 series. Designed for general‑purpose indoor industrial applications, it features a compact NEMA 1 (chassis) enclosure and is discontinued by the OEM, with surplus, refurbished, and used units available for maintenance and retrofitting.
Description
Product Description
The 1SU51005 is a 5HP (3.7kW) three-phase AC variable frequency drive (VFD) from the Baldor‑Reliance (now ABB) SP500 series. Designed for general‑purpose indoor industrial applications, it features a compact NEMA 1 (chassis) enclosure and is discontinued by the OEM, with surplus, refurbished, and used units available for maintenance and retrofitting.
Model Number Interpretation
1SU: SP500 series, three‑phase, high‑voltage class (575V), UL‑listed and IEC‑certified.
5: 575VAC input voltage range (517–632VAC nominal).
1: NEMA 1 (chassis) enclosure.
005: 5 horsepower rating.
Technical Specifications
Rated Power: 5HP / 3.7kW.
Input Voltage: 517–632VAC (575V nominal), three‑phase, 50/60Hz (±5Hz).
Input Current: 7.5A.
Output Current: 7.5A.
Enclosure: NEMA 1 (chassis), IP20, size B.
Dimensions (H×D×W): 301.7×165.1×219.2mm (11.88×6.5×8.63in).
Weight: 5.9kg (13lb).
Ambient Temperature: 0–40°C.
Control Mode: V/Hz (Volts‑per‑Hertz), linear or custom curve.
Carrier Frequency: 4kHz, 6kHz, 8kHz (software selectable).
Power Factor: 0.96 (displacement).
Certifications: UL Listed, IEC Certified.
Interface and Communication Configuration
Equipped with standard power terminals for three‑phase input (R, S, T) and output (U, V, W). A front‑mounted keypad and LED display enable local programming and monitoring. Control terminals include 3 digital inputs (start/stop, forward/reverse, fault reset), 1 SPDT relay output (fault/status), 1 analog input (4–20mA / 0–10Vdc), and 1 analog output (0–10Vdc) for external control and signaling. No onboard communication ports; fieldbus connectivity requires optional modules.
Core Functions
Features all‑digital PWM control for precise motor speed regulation and high efficiency. The NEMA 1 enclosure protects against dust and non‑corrosive contaminants for indoor use. Adjustable acceleration/deceleration rates reduce mechanical stress. Comprehensive protection includes overvoltage, undervoltage, overcurrent, overload, and overtemperature safeguards for drive and motor.
Application Scenarios
Suitable for conveyors, material handling, pumps, fans, blowers, and general machinery in manufacturing, automation, and light industrial environments. Ideal for retrofitting legacy SP500 systems or replacing older VFDs in 575V three‑phase applications.
Usage and Maintenance Instructions
Install vertically on a flat, cool, dry surface with adequate ventilation; avoid direct sunlight and moisture. Ensure all power and control wiring complies with local codes and is securely tightened before power‑up. Monitor operating temperature, current, and vibration regularly during operation. Keep cooling vents and fans clear of debris to prevent overheating. Periodically inspect terminals for tightness, corrosion, or overheating signs. Do not exceed the 0–40°C ambient range. Disconnect all power before maintenance or inspection. Store spare units in a cool, dry, dust‑free environment.
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