Schneider Electric PowerLogic™ MiCOM P723 Numerical High Impedance Differential Relay

Schneider Electric PowerLogic™ MiCOM P723 Numerical High Impedance Differential Relay is built for high impedance differential protection in applications where fast fault clearance and dependable stability are important. It belongs to the MiCOM P72x range and is used in generator, motor, reactor and busbar protection schemes where conventional differential arrangements need a simple but secure solution.

Unlike the single-phase MiCOM P721, the MiCOM P723 is intended for **three-phase high impedance differential protection** and can also be configured for **high impedance differential earth fault protection**. Depending on the connection setting, it can be used as **87 phase differential protection** or **87N earth differential protection**. This gives it more flexibility in installations where the protection scheme has to cover phase faults as well as earth fault conditions.

The relay keeps the basic advantages of a traditional high impedance scheme while adding the benefits of numerical protection. It provides event records, fault records, disturbance records and communication capabilities that make fault analysis easier and help maintenance teams understand how the protection operated during a fault.

Specifications

• Manufacturer: Schneider Electric
• Product Family: PowerLogic™ MiCOM
• Model: MiCOM P723
• Relay Type: Numerical High Impedance Differential Relay
• Protection Application: High Impedance Differential Protection
• Phase Configuration: Three-phase configurable high impedance differential relay
• Main Protection Functions: High impedance phase differential protection (87) and high impedance earth differential protection (87N)
• Suitable For: Generators, reactors, motors and busbar protection schemes
• Protection Principle: High impedance circulating current differential protection
• Technology: Numerical / Digital relay
• Records Available: Event records, fault records and disturbance records
• Communication Features: Available as part of numerical relay functionality
• Accessory Compatibility: Designed for use with MiCOM P79x resistor and metrosil unit in high impedance schemes

Features

• Three-phase high impedance differential protection relay.
• Can be configured for phase differential protection or earth differential protection.
• Suitable for generator, motor, reactor and busbar protection schemes.
• Helps achieve fast operation for internal faults within the protected zone.
• Maintains stability during heavy through-fault conditions in high impedance schemes.
• Combines traditional high impedance protection principles with numerical relay functionality.
• Supports event recording, fault recording and disturbance recording.
• Works with MiCOM P79x resistor and metrosil unit for complete high impedance differential protection arrangements.

Applications

• Three-phase differential protection schemes
• High impedance earth fault differential protection
• Generator protection
• Motor differential protection
• Reactor protection
• Busbar protection
• Utility and industrial protection panels
• High impedance differential protection systems

Schneider Electric PowerLogic™ MiCOM P723 Numerical High Impedance Differential Relay is suited for high impedance differential applications where a three-phase or earth differential protection scheme is required along with the added visibility and records offered by numerical protection.