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MiCOM Alstom P44x
P44x.jpg
 
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
 
Main characteristics:
 
 Settable quadrilateral operating characteristic offering consistent 0.85-1.3 cycle zone 1 operating time for general distance application 
 Choice of cost-effective built-in teleprotection: InterMiCOM64 at 56/64 kbit/s for direct fibre or MUX links with 2 or 3 ended applications; or EIA (RS) 232 for MODEM links in 2 ended applications 
 IEC 61850 redundant Ethernet, supporting self healing ring, RSTP, dual homing or PRP
 
Overall differentiation factors:
 
 Dual algorithm distance operation for maximum fault detection dependability
 IEC61850-9-2 process bus applications: deploy in digital substation architectures with merging units and non-conventional instrument transformers (NCITs)
 Distance to fault location assists despatching of maintenance crews 
 Full-scheme relay offers fast, discriminative response to double-circuit, cross-country and evolving faults (unlike inferior switched relays on the market)
 
Models Available:
 
 P441 Line-Distance Management IED
 P442 Line-Distance Management IED
 P444 Line-Distance Management IED for Transmission