ABB DSPAD/02/647 Stabilized Differential Relay

Description:

The ABB DSPAD/02/647 is a high-performance stabilized differential relay designed to provide comprehensive protection for power transformers and generator-transformers. It integrates multiple protection modules and features advanced functionalities to ensure reliable and accurate operation in various industrial environments.

Key Features:

• Integrated Modules:Combines three-phase differential, overcurrent, and earth-fault relays.
• Comprehensive Protection:Safeguards against winding short-circuits, interturn faults, earth faults, short circuits, interwinding short-circuits, and pole short circuits.
• Stabilization:Stabilized against unwanted operations during faults outside the protected area and transformer inrush conditions.
• Harmonic Restraint:
  • Second harmonic restraint to prevent unwanted operations during transformer inrush.
  • Fifth harmonic restraint to prevent unwanted operations during transformer overexcitation.
• CT Ratio Correction:Wide CT ratio correction range with accurate correction through digital setting.
• Output Relays:
  • Four heavy-duty output relays for circuit breaker tripping.
  • Five output relays for signaling.
• External Control Inputs:Five programmable external control inputs.
• Circuit Breaker Failure Protection:Integrated circuit breaker failure protection with adjustable operate time.
• Disturbance Recorder Functions:Integrated disturbance recorder functions for both analog and digital signals.
• Displays:Sensitive phase current and phase angle displays for energizing circuit connections and vector group matchings.
• Immunity:High immunity to electrical and electromagnetic interference, suitable for severe environments.
• Reliability:Ensures high availability and system reliability through continuous hardware and software supervision.