Areva MiCOM P441, Technical Manual

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Application Notes P44x/EN AP/E33
MiCOM P441/P442 & P444 Page 9/220
1.2.2 Non-Protection Features
The P441, P442 and P444 relays have the following non-protection features:
•
79/25 : Autoreclosure with Check synchronism - This permits up to 4 reclose shots,
with voltage synchronism, differential voltage, live line/dead bus, and dead bus/live
line interlocking available. Check synchronism is optional.
•
Measurements - Selected measurement values polled at the line/cable terminal,
available for display on the relay or accessed from the serial communications facility.
•
Fault/Event/Disturbance Records - Available from the serial communications or on
the relay display (fault and event records only).
•
Distance to fault locator - Reading in km, miles or % of line length.
•
Four Setting Groups - Independent setting groups to cater for alternative power
system arrangements or customer specific applications.
•
Remote Serial Communications - To allow remote access to the relays. The following
communications protocols are supported: Courier, MODBUS, IEC60870-5/103 and
DNP3 (UCA2 soon available).
•
Continuous Self Monitoring - Power on diagnostics and self checking routines to
provide maximum relay reliability and availability.
•
Circuit Breaker State Monitoring - Provides indication of any discrepancy between
circuit breaker auxiliary contacts.
•
Circuit Breaker Control - Opening and closing of the circuit breaker can be achieved
either locally via the user interface / opto inputs, or remotely via serial
communications.
•
Circuit Breaker Condition Monitoring - Provides records / alarm outputs regarding the
number of CB operations, sum of the interrupted current and the breaker operating
time.
•
Commissioning Test Facilities.
1.2.3 Additional Features for the P441 Relay Model
•
8 Logic Inputs - For monitoring of the circuit breaker and other plant status.
•
14 Output relay contacts - For tripping, alarming, status indication and remote
control.
1.2.4 Additional Features for the P442 Relay Model
•
Single pole tripping and autoreclose.
•
Real Time Clock Synchronisation - Time synchronisation is possible from the relay
IRIG-B input. (IRIG-B must be specified as an option at time of order).
•
Fibre optic converter for IEC60870-5/103 communication (optional).
•
Second rear port in COURIER Protocol (KBus/RS232/RS485)
•
16 Logic Inputs - For monitoring of the circuit breaker and other plant status.
•
21 Output relay contacts - For tripping, alarming, status indication and remote
control.