Basler Electric UFOV 260 A Underfrequency/Overvoltage Protective Module

The Basler Electric UFOV 260 A is a dedicated protective module that monitors AC system frequency and voltage, providing independent alarm and trip outputs for underfrequency and overvoltage conditions. This module is particularly suited for distributed generation systems, where maintaining power quality is essential for grid stability and equipment safety.

Its analog measuring circuit offers fast response and high noise immunity, making it suitable for environments with significant harmonic distortion. The module includes a built‑in time delay to prevent nuisance tripping during transient disturbances.

Key Features

• Underfrequency setpoint: 45–65 Hz (adjustable)

• Overvoltage setpoint: 80–140% of nominal (adjustable)

• Independent time delays for each function

• Two isolated relay outputs (form‑C)

• LED indication for each protection element

• Wide input voltage range: 120–480 VAC

• Compact enclosure with terminal cover

Technical Specifications

Input: 120/240/480 VAC, 50/60 Hz; burden: < 4 VA; frequency accuracy: ±0.05 Hz; voltage accuracy: ±0.5%; output relay: 5 A at 250 VAC; operating temperature: -20°C to +65°C; humidity: up to 95% non‑condensing.

Applications

Ideal for generator anti‑islanding protection, load shedding schemes, and voltage supervision in industrial plants. The UFOV 260 A is also used in renewable energy systems to disconnect on abnormal frequency or voltage.

Installation and Adjustment

Mount the module on a panel or DIN rail. Connect AC sensing lines and auxiliary supply. Set the trip thresholds and time delays via potentiometers and DIP switches. The module includes a manual reset button and a test function.

Reliability and Maintenance

The solid‑state design ensures long life with no calibration drift. The module is protected against overvoltage and transients. Routine visual inspection and functional testing are recommended.

Why Choose the UFOV 260 A?

This module provides a simple, cost‑effective solution for frequency and voltage protection, backed by Basler Electric’s quality standards. Its versatility and reliability make it a popular choice for system integrators.

In conclusion, the Basler Electric UFOV 260 A is a robust protective module that ensures system safety by quickly detecting and responding to frequency and voltage deviations.