Basler BE1‑32 Reverse Power Relay

The Basler BE1‑32 is a solid‑state reverse power relay designed to protect generators from motoring conditions. This model, with configuration BE1‑32‑A1E‑E1C‑B0N0F (also referenced as BE132A1EE1CB0N0F), detects when a generator draws power from the system instead of supplying it, indicating a loss of prime mover torque. The relay trips the generator breaker to prevent damage to the turbine or engine.

Key Features

The relay features an adjustable reverse power pickup level and independent time delay. It includes high‑accuracy power measurement with low burden CT inputs. The unit provides 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. CT secondary: 5 A or 1 A. Reverse power pickup: 0.5‑20% of rated power (adjustable). Time delay: 0.1‑10 seconds (adjustable). 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 the real power flowing from the generator. Under normal operation, power flows outward (positive). If power reverses (negative), the relay initiates timing. If the reverse power persists for the set delay, the output relay trips the breaker, preventing the generator from motoring.

Applications

This relay is used in diesel, gas, and steam turbine generator sets to prevent motoring. It is essential for protecting prime movers from damage due to fuel or steam failure.

Installation and Configuration

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

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 BE1‑32 reverse power relay provides dependable protection against generator motoring, ensuring the safety of prime movers and system integrity.