Schneider Electric PowerLogic™ MiCOM P139 Feeder Management and Bay Control Relay

Schneider Electric PowerLogic™ MiCOM P139 Feeder Management and Bay Control Relay is designed for medium-voltage feeder protection, switchgear control and bay supervision in a single unit. It combines numerical time overcurrent protection with bay control functions, making it suitable for substations where protection and control need to work together without relying on multiple separate devices.

The MiCOM P139 is used in applications involving cables, overhead lines, transformers and motors, so it fits a wider range of feeder-related duties than a relay focused only on basic overcurrent protection. Along with protection functions, it can control and monitor multiple switchgear units within a bay, which makes it useful for feeder panels and substation bays where breaker and disconnector status, switching commands and operational visibility all matter.

A practical strength of the P139 is its flexibility. It supports multiple setting groups, a wide range of predefined bay types and communication protocols used in substation automation. That makes it easier to adapt the relay to different network conditions and integrate it into modern control and SCADA systems without turning the panel into a patchwork of separate devices.

Specifications

• Manufacturer: Schneider Electric
• Product Family: PowerLogic™ MiCOM
• Model: MiCOM P139
• Relay Type: Numerical Feeder Management and Bay Control Relay
• Protection Application: Time overcurrent protection, feeder protection and bay control
• Series: MiCOM P13x
• Suitable For: Cables, overhead lines, transformers, motors and medium-voltage feeder bays
• Main Protection Functions: Time overcurrent protection, feeder protection and associated control functions
• Control Capability: Control and monitoring of up to 6 electrically operated switchgear units depending on configuration
• Setting Groups: 4
• Bay Type Support: More than 250 predefined bay types with option for customised bay type download
• Communication: Multiple communication protocols including IEC 61850
• Additional Interface: InterMiCOM direct end-to-end protection communication
• Mounting Options: Flush mounting or wall-surface mounting
• Case Type: Standard 19-inch modular case with plug-in modules
• HMI Option: Optional detachable HMI

Features

• Combines feeder protection and bay control in one relay.
• Suitable for cable feeders, overhead lines, transformers and motor-related feeder applications.
• Supports control and monitoring of multiple switchgear units within a bay.
• Four setting groups allow the relay to adapt to different system operating conditions.
• Large selection of predefined bay types helps simplify substation configuration.
• Supports communication with SCADA and substation automation systems through protocols including IEC 61850.
• InterMiCOM interface supports direct communication between protection devices.
• Available in modular construction for easier integration into substation panels.

Applications

• Medium-voltage feeder protection
• Bay control in utility substations
• Industrial distribution feeder panels
• Cable and overhead line feeder protection
• Transformer feeder protection
• Motor feeder protection
• Switchgear control and monitoring
• Substation automation and SCADA-integrated protection schemes

Schneider Electric PowerLogic™ MiCOM P139 Feeder Management and Bay Control Relay is a strong fit for substations and feeder panels where protection, switchgear control and operational supervision all need to sit in the same relay instead of being split across several devices.