Earth-fault detector PCS-985RE

Product Description
The PCS-985RE is designed for rotor earth-fault detection using external voltage injection. By employing self-adaptive active switching technology, it supervises rotor insulation even when no excitation voltage is present. The relay provides high and equal sensitivity to any one-point earth fault within the rotor winding. Automatic and manual brush control functions allow application to brushless exciter units and conventional brush systems.

Miscellaneous

• Self-diagnostic
• External DC power supply monitoring and alarming
• GPS clock synchronization
• Fault recorder
• IEC61850 MMS & GOOSE for station bus
• IEC60870-5-103 protocol
• MODBUS protocol

Protection Function

• One-point earth-fault protection of rotor
• Two-point earth-fault protection of rotor
• Definite-time control of electric brush
• Manual control of electric brush
• Frequency regulation of external injected voltage
• Fault location
• External injected voltage supervision

Technical specifications

• Model: PCS-985RE
• Application: Rotor earth-fault detection via external voltage injection
• Technology: Self-adaptive active switching enabling supervision without excitation voltage
• Sensitivity: High; equal sensitivity to any one-point earth fault within rotor winding
• Brush control: Automatic and manual electric brush control for protection applicability to brushless exciters
• Protection functions: One-point and two-point rotor earth-fault protection; fault location; external injected voltage supervision
• Control features: Definite-time and manual control of electric brush; frequency regulation of injected voltage
• Communications & protocols: IEC61850 MMS & GOOSE, IEC60870-5-103, MODBUS
• Monitoring & recording: Self-diagnostic, external DC power supply monitoring/alarm, GPS clock sync, fault recorder