Basler Electric UFOV 260 A Underfrequency/Overvoltage Protective Module
The Basler Electric UFOV 260 A is a compact protective module that combines underfrequency and overvoltage sensing in a single device. It is designed to monitor AC power systems and provide alarm or trip signals when the frequency drops below or the voltage rises above preset thresholds. This module is widely used in generator control panels, automatic transfer switches, and load shedding systems.
The UFOV 260 A features a solid‑state design with precision comparators and adjustable setpoints, ensuring accurate and repeatable operation. Its small footprint allows easy integration into space‑limited enclosures, while the isolated relay outputs provide direct interface with circuit breakers or annunciators.
Key Features
Underfrequency detection: 45–65 Hz adjustable
Overvoltage detection: 80–140% of nominal voltage
Independent trip and alarm relays
LED indicators for power, underfrequency, and overvoltage
Wide operating temperature range: -20°C to +60°C
DIN‑rail or panel mounting
Technical Specifications
Input voltage: 120/240 VAC, 50/60 Hz; burden: < 3 VA; frequency accuracy: ±0.1 Hz; voltage accuracy: ±1%; output relays: 2 x SPDT, 5 A at 250 VAC; reset: automatic or manual (selectable).
Applications
Typical applications include generator protection against loss of load (overspeed), feeder protection for voltage-sensitive loads, and underfrequency load shedding in islanded power systems. The module also serves as a backup protection for utility interconnections.
Installation and Configuration
Mount the module on a 35 mm DIN rail or using screws. Connect the AC sensing leads to the monitored bus. Adjust the underfrequency and overvoltage setpoints using the onboard potentiometers. The time delay for each function can also be configured via DIP switches.
Reliability and Self‑Monitoring
The UFOV 260 A incorporates loss‑of‑sensing detection and internal fault monitoring. The solid‑state circuitry is immune to shock and vibration, ensuring long‑term stability. Periodic checks of setpoints and relay operation are recommended.
Why Choose the UFOV 260 A?
This module offers a cost‑effective solution for dual‑parameter protection without compromising on accuracy or reliability. Basler Electric’s proven design and quality manufacturing make it a trusted choice for engineers worldwide.
In summary, the Basler Electric UFOV 260 A is a versatile and dependable protective module, safeguarding equipment from frequency and voltage anomalies in a wide range of power system applications.
