Basler Electric BE1-32R Solid State Power Relay

The Basler Electric BE1-32R is a solid-state directional power relay designed specifically for reverse power protection of generators. It detects the flow of real power in the reverse direction, which occurs when a generator loses its prime mover and begins motoring, drawing power from the system. This condition can damage the turbine and generator, so the BE1-32R provides a rapid and reliable trip signal to disconnect the generator.

The model designation F1F E1K A4N1F indicates specific factory configuration options such as input voltage, frequency, and output contact arrangement, but all BE1-32R relays share the same core functionality and performance characteristics.

Principle of Operation

The BE1-32R measures three-phase voltage and current to compute real power and its direction. It compares the measured reverse power against an adjustable pickup setting. If the reverse power exceeds the setpoint for a predetermined time delay, the relay operates its output contacts. The relay includes a directional element that ensures only power flowing out of the generator (reverse) is detected, ignoring normal forward power flow.

Key Features

• Solid-state construction for high reliability and fast operation

• Adjustable reverse power pickup from 0.1 to 10 percent of rated power

• Adjustable time delay from 0.1 to 10 seconds

• Directional control with adjustable torque angle

• Wide range of voltage and current inputs for 50/60 Hz systems

• Output contacts rated for tripping and alarm

• LED indicators for power, pickup, and trip

• Test points for calibration and function verification

Technical Specifications

The relay accepts nominal AC voltage inputs of 120 or 240 VAC, and current inputs of 1 A or 5 A from CTs. The pickup setting is continuously adjustable. The time delay can be set with a rotary switch or potentiometer. Auxiliary power is 120/240 VAC or 24/125 VDC. Operating temperature is -20 to +65 degrees Celsius. The relay is compliant with IEEE C37.90 and IEC 60255.

Protection Application

Primary use is reverse power protection for steam turbines, gas turbines, and diesel generators. It prevents turbine overspeed and mechanical damage by tripping the generator when motoring is detected. The BE1-32R can also be used as a directional overcurrent backup for system faults, though its main function remains power direction sensing.

Installation and Calibration

Panel mounting is standard. Wiring includes voltage sensing, current inputs, auxiliary power, and output contacts. Calibration involves applying a known reverse power signal and adjusting the pickup and time delay to the desired values. The relay includes a built-in test switch for simulating fault conditions during commissioning.

Reliability and Compliance

Designed for continuous duty in generating stations, the BE1-32R has a proven track record of reliability. It is manufactured to ISO 9001 standards and carries CE and UL approvals. The relay is immune to transient overvoltages and electromagnetic interference.

Conclusion

Basler Electric BE1-32R solid-state power relay offers precise reverse power protection with flexible settings and robust construction. It is a trusted component for generator protection systems worldwide.