Basler PRP110 Reverse Power Relay

The Basler PRP110 (part number 90 55600 100) is a solid-state reverse power relay designed to protect synchronous generators from motoring conditions. This relay detects the direction of real power flow and trips the circuit breaker when reverse power is detected, preventing the generator from being driven as a motor by the grid or other generators. The PRP110 is essential for protecting turbine-driven generators from damage caused by loss of prime mover.

The relay features solid-state technology with high accuracy and adjustable pickup and time delay settings. It includes LED indicators for power, pickup, and trip status, as well as a test mode for commissioning. The PRP110 is housed in a rugged enclosure suitable for panel mounting in generator control rooms and substations.

Technical Specifications

• Model: PRP110 (90 55600 100)

• Protection type: Reverse power (directional power)

• Power sensing: Single-phase or three-phase voltage and current inputs

• Pickup range: Adjustable (typically 0.01-1.00 per unit)

• Time delay: Adjustable (0.1-30 seconds)

• Accuracy: ±1% of reading

• Output contacts: 1 form C (trip)

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

• LED indicators: Power, pickup, trip

• 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: Pickup and time delay can be field-adjusted.

• Solid-state design: Reliable operation with no moving parts.

• Test mode: Allows relay testing without tripping the breaker.

• LED indicators: Visual status of power and fault conditions.

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.

• Parallel generator systems: Preventing reverse power flow in multi-generator installations.

Installation and Configuration

Mount the PRP110 on a panel using the provided brackets. Connect the voltage inputs from the PTs, the current inputs from the CTs, the power supply, and the output contacts. Configure the pickup value and time delay using the front-panel controls. 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 PRP110 provides reliable reverse power protection, safeguarding generators from motoring conditions and ensuring safe operation of power systems.