Phase protection relay MiCOM P441 - P444 series

panel-mountprogrammabledigital

MiCOM Alstom P441, P442 & P444 numerical full scheme distance relays provide flexible, fast and reliable protection of transmission and sub-transmission lines. Basic description: Full scheme 5-zone distance, plus aided directional earth fault (DEF) and comprehensive backup protection Application fields: utility lines and cables at all voltage levels, particularly oriented towards transmission grids Single circuit breaker application - single and/or 3-pole tripping Full suite of monitoring, control and recording capabilities plus fault locator, autoreclose and check synchronism Key customer benefits: Comprehensive communication options including IEC 61850 and redundant Ethernet ports IEC61850-9-2 interface option allows integration within digital substation process bus architectures Variety of built-in aided schemes over 2 channels Unparallelled speed, security and selectivity