Basler BE1‑320 Directional Power Relay

The Basler BE1‑320 is a solid‑state directional power relay designed for protection of generators, feeders, and transmission lines. This model, with configuration BE1‑320/UD3FE1PC0N0F, provides directional power measurement and protection functions, detecting reverse power, directional overcurrent, and power flow abnormalities. It is essential for ensuring the stability and reliability of power systems in utility, industrial, and co‑generation applications.

Key Features

The relay features adjustable power pickup setpoints and time delays. It includes directional sensing for accurate fault discrimination. The unit provides multiple output contacts for tripping and alarming. It includes a target indicator for fault identification and test points for calibration. The relay is housed in a rugged draw‑out case for easy maintenance.

Technical Specifications

Input voltage: 120 or 240 VAC, 50/60 Hz. Current input: 5 A or 1 A CT secondary. Power pickup: adjustable range. Time delay: 0.1‑10 seconds (adjustable). Directional characteristic: forward or reverse. Output contacts: 2 form‑C rated at 5 A at 250 VAC. Operating temperature: -20°C to +55°C. Auxiliary supply: 120/240 VAC or 48/125 VDC.

Operating Principles

The relay measures both voltage and current to determine real power magnitude and direction. It compares the measured power against the pickup setpoint and initiates timing if the power exceeds the threshold in the defined direction. If the condition persists for the set time delay, the output relay energizes, sending a trip signal.

Applications

This relay is used in generator protection, feeder protection, and transmission line protection. It is suitable for applications requiring directional power discrimination, such as parallel feeders, ring networks, and co‑generation interconnections.

Installation and Configuration

Mount the relay in a standard panel cutout. Connect voltage and current inputs, auxiliary power, and trip circuits. Set the power pickup, direction, and time delay using front‑panel controls. A secondary injection test is recommended to verify correct operation.

Maintenance and Reliability

Solid‑state design ensures high reliability. Periodic testing and calibration are recommended. Routine visual inspection of connections is sufficient.

Conclusion

The Basler BE1‑320 directional power relay offers reliable directional power protection with flexible settings, making it an essential component for modern power systems.