Description

Schneider MiCOM P631 Relay

The Schneider MiCOM P631 Relay differential protection device is intended for the fast and selective short-circuit protection of transformers, motors, generators and other installations with 2 windings. The Schneider MiCOM P631 Relay provides high-speed three-system differential protection using a tripleslope characteristic and two high-set differential elements in combination with transformer inrush restraint, overfluxing restraint and through-stabilization. Amplitude and vector group matching is done just by entering the nominal values of transformer windings and associated current transformers. An (optional) overreaching current measuring circuit monitoring function will prevent
unwanted tripping by differential protection for faults in the CT’s secondary circuit. Phase swapping allows motor / generator protection applications with enlarged protection zones. In addition many supplementary protective functions are incorporated in the
devices. These can be individually configured and cancelled. The relevant protection parameters can be stored in four independent parameter subsets in order to adapt the protection device to different operating and power system management conditions.
During operation, the user-friendly interface makes it easy to set the device parameters and allows safe operation of the substation by preventing nonpermissible switching operations. These features give the user the means to adapt the P631 to the protection and
control capacity required in a specific application. The powerful programmable logic provided by the protection device also makes
it possible to accommodate special applications.

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