Basler BE1-32R Directional Power Relay

The Basler BE1-32R is a directional power relay designed to provide reverse power protection for synchronous generators and motors. This relay detects the direction of real power flow and trips the circuit breaker when reverse power is detected, preventing the generator from being motorized by the grid or other generators. The BE1-32R is essential for protecting turbine-driven generators from damage caused by loss of prime mover.

The relay features microprocessor-based measurement with high accuracy and adjustable pick-up and time delay settings. It includes a front-panel display for local monitoring and keypad for setting adjustment. The BE1-32R supports communication via Modbus RTU for remote supervision. Its rugged construction and wide temperature range make it suitable for substation and industrial applications.

Technical Specifications

• Model: BE1-32R

• Protection type: Directional power (reverse power)

• Power sensing: 3-phase voltage and current inputs

• Pick-up range: 0.01-1.00 per unit (adjustable)

• Time delay: 0.1-30 seconds (adjustable)

• Accuracy: ±1% of reading

• Output contacts: 2 form C (trip and alarm)

• Communication: Modbus RTU (RS-485)

• Power supply: 24-240 V AC/DC (universal)

• Display: 2-line LCD with keypad

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

• Certifications: CE, UL, RoHS

Functional Features

• Directional power detection: Accurately measures real power flow direction and magnitude.

• Adjustable settings: Pick-up and time delay can be field-adjusted to suit specific generator characteristics.

• High accuracy: ±1% accuracy ensures reliable protection without nuisance tripping.

• Communication capability: Modbus RTU enables remote monitoring and setting changes.

• Event recording: Stores power flow data for post-event analysis.

Typical Applications

• Steam turbine generators: Protection against loss of steam supply.

• Gas turbine generators: Protection against fuel supply interruption.

• Diesel gensets: Protection against engine stall.

• Motors: Protection against reverse power during generator motoring.

Installation and Configuration

Mount the BE1-32R on a panel. Connect the voltage inputs from the PTs, the current inputs from the CTs, the power supply, and the output contacts. Configure the pick-up value and time delay using the front-panel keypad. The relay can be tested using a three-phase test set to verify operation.

Compliance

Complies with IEEE C37.90, IEC 60255, CE and UL approved, RoHS compliant.

Conclusion

The Basler BE1-32R provides reliable directional power protection, safeguarding generators from reverse power conditions and ensuring safe operation of power systems.