Reliance Electric 1VT4207U
The 1VT4207U is a 7.5HP (5.5kW) three‑phase AC variable frequency drive (VFD) from the Baldor‑Reliance (now ABB) VT series, designed for general‑purpose and light industrial applications. It features a compact NEMA 1 (IP20) enclosure, reliable V/Hz control, and is optimized for fan, pump, and conveyor systems. The unit is discontinued by the OEM, with surplus, refurbished, and used units available for maintenance and system retrofitting.
Description
Product Description
The 1VT4207U is a 7.5HP (5.5kW) three‑phase AC variable frequency drive (VFD) from the Baldor‑Reliance (now ABB) VT series, designed for general‑purpose and light industrial applications. It features a compact NEMA 1 (IP20) enclosure, reliable V/Hz control, and is optimized for fan, pump, and conveyor systems. The unit is discontinued by the OEM, with surplus, refurbished, and used units available for maintenance and system retrofitting.
Model Number Interpretation
1VT: VT series, three‑phase, general‑purpose VFD, NEMA 1 enclosure.
4: 460VAC input voltage range (414–506VAC nominal).
207: 7.5 horsepower rating (207 ≈ 7.5HP in VT series coding).
U: Standard variant, no built‑in braking transistor, 24VDC control logic.
Technical Specifications
Rated Power: 7.5HP / 5.5kW.
Input Voltage: 414–506VAC (460V nominal), three‑phase, 50/60Hz.
Input Current: 11.2A.
Output Current: 9.0A.
Enclosure: NEMA 1 (IP20), size B.
Dimensions (H×D×W): 320×155×210mm (12.6×6.1×8.3in).
Weight: 6.8kg (15lb).
Ambient Temperature: 0–40°C.
Control Mode: V/Hz (Volts‑per‑Hertz), linear or custom curve.
Carrier Frequency: 4kHz (fixed).
Short Circuit Rating: 10,000A.
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 stable motor speed regulation and high energy efficiency. The NEMA 1 enclosure protects against dust and accidental contact for indoor use. Adjustable acceleration/deceleration rates reduce mechanical stress on motors and loads. Comprehensive protection includes overvoltage, undervoltage, overcurrent, overload, and overtemperature safeguards for drive and motor. Compact design saves panel space for standard industrial installations.
Application Scenarios
Suitable for fans, pumps, blowers, conveyors, and general machinery in light industrial, commercial, and HVAC systems. Ideal for retrofitting legacy VT series systems or replacing older VFDs in 460V three‑phase non‑washdown applications.
Usage and Maintenance Instructions
Install vertically on a flat, cool, dry surface with adequate ventilation; avoid direct sunlight, moisture, and corrosive fumes. 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. Clean the enclosure exterior with a dry cloth; do not use liquids or harsh chemicals. 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.
Get a Quote