Basler Electric BE132R Power Relay

The Basler Electric BE132R (T245579) is a solid‑state directional power relay that provides reverse power protection for synchronous generators. It detects when power flows from the system into the generator—a condition known as motoring—which can cause severe damage to the prime mover (turbine or engine). The relay measures real power flow and trips when the reverse power exceeds a preset threshold for a selected time delay. It is an essential component for protecting turbines, diesel engines, and other prime movers in power generation systems.

Measurement and Settings

The relay uses voltage and current inputs to compute real power magnitude and direction. An adjustable pickup setting, typically from 0.1 to 5% of rated power, determines the reverse power threshold. A time delay, adjustable from 1 to 30 seconds, prevents nuisance trips during transient disturbances. The relay features front‑panel controls for adjustment, LED indicators for status, and a target indicator for trip identification. A manual reset button is provided.

Directional Sensing

A built‑in phase‑shift network compensates for CT and PT phase errors, ensuring accurate directional discrimination. The relay is insensitive to reactive power and harmonics, focusing solely on real power flow. It includes a test jack for injecting voltage and current signals to simulate reverse power conditions during commissioning. The relay offers pickup accuracy of ±3% of setting.

Technical Specifications

Voltage input: 100‑480 VAC, 50/60 Hz. Current input: 1 A or 5 A secondary. Pickup accuracy: ±3% of setting. Time delay: 0.1‑30 seconds adjustable. Output contacts: 2 Form C (SPDT), rated 5 A at 250 VAC. Power supply: 24‑250 VDC or 120‑240 VAC. Operating temperature: –30°C to +70°C. The relay meets IEEE C37.90 surge withstand capability.

Applications

The BE132R is used in steam turbine generators, gas turbine generators, and diesel generator sets. It is commonly installed in co‑generation plants, emergency standby systems, and industrial power systems. The relay provides primary protection against reverse power and can also be used for loss‑of‑excitation detection when combined with other relays.

Installation and Commissioning

Mount the relay in a standard panel cutout. Connect voltage inputs from the generator bus and current inputs from the CTs, ensuring correct polarity for proper directional sensing. Commissioning involves setting the pickup and time delay, then testing with a secondary injection test set. The relay includes a built‑in test pushbutton for quick verification.

Reliability and Standards

Compliant with ANSI/IEEE C37.90 and IEC 60255, the BE132R is built with solid‑state circuitry and conformal coating for harsh environments. Its self‑supervision monitors internal circuits and provides a warning output on failure. Regular calibration is recommended but not frequently required.

Conclusion

The Basler Electric BE132R power relay (T245579) is a precise, dependable, and robust solution for reverse power protection. Its adjustable settings and proven design ensure the safety of critical prime movers in any power generation facility.