Areva MiCOM P225, Technical Manual

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User Guide P225/EN FT/B11
MiCOM P225 Page 17/52
4.8 The TRIP STATISTICS menu
In the TRIP STATISTICS menu the following are displayed:
−
the total number of tripping operations,
−
the number of tripping operations per type of fault.
Tripping can have two possible causes:
−
tripping on a fault: when the P225 relay detects a fault (exceeding a threshold), it
generates a tripping order;
−
deliberate tripping: the operator can order tripping from three access points:
−
a logic input, (EXT1 and EXT2 functions)
−
the RS232 port on the front panel,
−
the communications network via the RS485 rear port.
N.B.: – The tripping orders stored in the memory of the MiCOM P225
protection relay for the statistics are only those transmitted to the
tripping relay (logic output RL1). This relay is one of the logic outputs
of the MiCOM P225. It is configured in the TRIP OUTPUT RLY
submenu.
– Motor shutdowns for which the command was not relayed via the
output relay RL1 of the MiCOM P225 are not taken into account in the
TRIP STATISTICS menu.
4.9 The COMMUNICATION menu
The MiCOM P225 relay can communicate under the MODBUS
TM
, Courier or IEC 60870-5
protocols via the RS485 port located at the rear. These protocols are based on the master-
slave principle. The P225 relay can therefore be integrated, as a slave, in a digital monitoring
and control system. In this system, the supervisor (master), for example a PC, can:
•
read and modify the setting values,
•
remote the measurements, alarm data, changes of state (changes of state of
inputs/outputs, changes of setting group), values relating to fault recordings,
disturbance recording and the form of the starting current and voltage,
•
issue remote orders such as commands to open or close the circuit breaker/contactor
(motor On/Off), to block start, to trig disturbance recording or to acknowledge the relay
remotely.