Basler BE1-50/51M-104 Overcurrent Relay

The Basler BE1-50/51M-104 is a digital overcurrent relay designed for motor and generator protection. It provides instantaneous (50) and time‑overcurrent (51M) protection with programmable curves. The relay features high accuracy and adjustable settings, suitable for industrial and utility applications.

Includes a front‑panel display and keypad for local setup. Supports Modbus communication for remote monitoring.

Technical Specifications

• Model: BE1-50/51M-104

• Protection: Instantaneous (50) and time (51M) overcurrent

• Current sensing: 1/5 A CT inputs

• Pickup ranges: 0.5‑20 A (adjustable)

• Time curves: Definite, IEC, IEEE

• Output contacts: 2 form C

• Power supply: 24‑240 V AC/DC

• Operating temperature: -40°C to +70°C

• Certifications: CE, UL, RoHS

Functional Features

• Dual protection: Instantaneous and time‑overcurrent in one relay.

• Adjustable curves: Flexible coordination.

• Event recording: Stores fault data.

Typical Applications

• Motor protection.

• Generator backup protection.

• Feeder protection.

Installation

Panel mount, connect CTs and power. Configure via keypad or software.

Conclusion

BE1-50/51M-104 offers comprehensive overcurrent protection in a single relay.