Basler Electric BE1-BPR – Breaker Protection Relay for Switchgear

The Basler Electric BE1-BPR (part number 9272000315) is a dedicated breaker protection relay designed to monitor the status and integrity of circuit breakers in power distribution systems. It provides continuous supervision of trip coils, close coils, and auxiliary contacts, ensuring that the breaker is ready to operate when required.

Monitoring and Alarm Functions

The relay checks the continuity of the trip circuit, detecting open coils or wiring faults that could prevent the breaker from tripping during a fault. It also monitors the number of trip operations and accumulates contact wear information, enabling predictive maintenance. Output contacts are provided for local and remote alarms, indicating breaker failure, loss of control voltage, or excessive operations.

• Inputs: trip coil supervision, close coil supervision, breaker status

• Outputs: 2 Form‑C alarms (trip circuit fail, operations count)

• Operation counter: 0–99999 cycles (non‑volatile memory)

• Power supply: 120/240 V AC or 125/250 V DC

• LED indicators: power, trip coil OK, alarm

• Mounting: panel draw‑out case

• Connections: screw terminals

• Operating temperature: –20 °C to +65 °C

Application in Protection Schemes

The BE1-BPR is typically installed in medium‑voltage switchgear, generator breaker panels, and transformer feeders. It complements overcurrent and differential relays by ensuring the breaker is functional. The relay can also be used to initiate a spare breaker close or to provide an annunciation signal to a control room.

Installation and Configuration

Mounting is via a standard panel cutout. All settings are made using front‑panel switches and dials. The relay includes a test button to verify alarm circuits without tripping the breaker.

Reliability and Standards

Built with Basler’s proven solid‑state technology, the BE1-BPR complies with IEEE C37.90 and IEC 60255 standards. Its rugged construction ensures reliable performance in substation environments.

In summary, the Basler Electric BE1‑BPR breaker protection relay enhances switchgear reliability by providing essential monitoring and alarm functions for circuit breakers.