Schneider Electric Easergy MiCOM P634 Numerical Transformer Differential Protection Relay

Schneider Electric Easergy MiCOM P634 Numerical Transformer Differential Protection Relay is designed for fast and selective protection of transformers, generators, motors and other installations with up to four windings. It detects internal faults quickly while maintaining stability during transformer energization, over-fluxing conditions and external faults, helping protect valuable equipment and reduce unplanned outages.

The MiCOM P634 combines differential protection, monitoring and control functions in a single relay. It automatically compensates for transformer vector groups and current transformer ratios after the transformer data is entered, making commissioning faster and reducing manual calculations. The relay also supports virtual winding configuration for ring bus and breaker-and-a-half substations, giving engineers greater flexibility when designing complex protection schemes.

Four independent setting groups allow the relay to adapt to changing operating conditions, while programmable logic helps customise protection and control functions for specific applications. With additional communication and monitoring capabilities, the MiCOM P634 integrates easily into modern substations and industrial power systems.

Specifications

• Manufacturer: Schneider Electric
• Product Family: Easergy MiCOM
• Model: MiCOM P634
• Relay Type: Numerical Transformer Differential Protection Relay
• Protection Application: Transformer differential protection
• Suitable For: Four-winding transformers, generators, motors and other protected installations
• Differential Protection: High-speed three-system differential protection
• Differential Characteristic: Triple-slope characteristic
• High-Set Differential Elements: Two
• Transformer Inrush Restraint: Yes
• Over-Fluxing Restraint: Yes
• Through-Fault Stabilization: Yes
• Vector Group Compensation: Automatic
• Current Transformer Ratio Compensation: Automatic
• Virtual Winding Function: Supported for ring bus and breaker-and-a-half applications
• Phase Swapping: Supported for motor and generator protection
• CT Circuit Supervision: Available depending on configuration
• Setting Groups: Four
• Programmable Logic: Yes
• Communication: Compatible with substation automation systems

Features

• Numerical transformer differential protection relay for four-winding transformer applications.
• Provides fast and selective protection against internal transformer faults.
• Automatically compensates for transformer vector groups and CT ratios.
• Includes transformer inrush restraint to prevent unnecessary tripping during energization.
• Supports over-fluxing restraint and through-fault stabilization.
• Virtual winding function simplifies protection of complex busbar arrangements.
• Four setting groups allow flexible operation under different system conditions.
• Programmable logic supports customised protection and control schemes.
• Integrates with substation automation and communication systems.
• Suitable for utility and industrial power applications.

Applications

• Four-winding transformer protection
• Generator differential protection
• Motor differential protection
• Utility substations
• Industrial power distribution systems
• Ring bus substations
• Breaker-and-a-half substations
• Transmission and distribution networks

Schneider Electric Easergy MiCOM P634 Numerical Transformer Differential Protection Relay provides dependable protection for complex transformer installations while offering the flexibility required for modern substations and industrial power systems.