Pilot Wire Differential Relay

50/51, 87/85

• High Sensitivity
• High Speed
• High Stability with automatic Bias
• Adjustable stability coefficient
• Adjustable Compensation of Pilot circuit impedence
• Continuous Monitoring of Pilot wires impedance
• Back-up Overcurrent element
• Oscillographic recording
• Breaker Failure protection
• 5kV isolation level of the pilot (15kV with additional transformer)
• Up to 1000 ohm pilot resistence (up to 2500 ohm additional transformer)