Basler Electric BE1-32R – Solid‑State Reverse Power Relay (Configuration E1EA1OA0N0F)

The Basler Electric BE1-32R (model configuration E1EA1OA0N0F) is a solid‑state directional power relay designed to detect reverse power flow in synchronous generators. It trips when the generator begins to motor—drawing power from the grid rather than supplying it—preventing damage to the prime mover, such as steam turbines or diesel engines.

Operating Principles

The relay continuously monitors the voltage and current on each phase and computes the real power direction. When the power reverses beyond the adjustable pickup threshold, the relay initiates a trip command after a time delay. The BE1-32R offers both definite‑time and inverse‑time characteristics, allowing coordination with other protective devices. The pickup level is adjustable from 0.5% to 20% of the generator’s rated power.

• Voltage input: 120/240 V AC, 50/60 Hz

• Current input: 5 A from CT secondary

• Pickup setting: 0.5–20% of rated power, continuous adjustment

• Time delay: 0.1–10 seconds (definite or inverse)

• Accuracy: ±2% of reading

• Output contacts: 2 Form‑C relays, 5 A at 250 V AC

• Power supply: 120/240 V AC or 125/250 V DC

• LED indicators: power direction, alarm, and trip

• Mounting: panel draw‑out case

• Operating temperature: –20 °C to +65 °C

Applications

This relay is essential for any generator that operates in parallel with other sources, including utility grids, other generators, or UPS systems. It is widely used in cogeneration, standby power, and marine installations to ensure that a failed prime mover does not cause the generator to act as a motor.

Installation and Testing

The BE1-32R mounts in a standard panel cutout with all settings accessible from the front face. A test jack allows secondary injection testing to verify calibration without disturbing field wiring. The relay includes a target indicator for trip indication and a manual reset pushbutton.

Reliability and Standards

Built with Basler's proven hybrid technology, the BE1-32R offers excellent surge withstand and thermal stability. It meets IEEE C37.90 and IEC 60255 standards, ensuring reliable operation in substation environments.

In summary, the Basler Electric BE1‑32R reverse power relay provides accurate, adjustable protection against generator motoring, safeguarding both electrical and mechanical assets.