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16
R E M 6 1 5 A N S I 5 . 0 F P 1 M OTO R P R OT E C T I O N A N D C O N T R O L
Figure 8. Recording
and event capabil-
ities overview
11. Condition monitoring
The condition monitoring functions of the relay
constantly monitor the performance and the
condition of the circuit breaker.
The monitoring comprises the spring charging
time, SF6 gas pressure, the travel time and the
inactivity time of the circuit breaker. The
monitoring functions provide operational circuit
breaker
history data, which can be used for scheduling
preventive circuit breaker maintenance.
In addition, the relay includes a runtime counter for
monitoring of how many hours the motor has been
in operation thus enabling scheduling of time-
based preventive maintenance of the motor.
Process
events
(FIFO)
Fault
records
(FIFO)
Audit
trail
events
(FIFO)
Disturbance
records
n...100
Load profile
record
...7 yrs
Function specific data
History view
1024
128
Fault summary;
Trip timestamp, Function, Currents, Voltages, etc.
2048
System and security-related events;
Configuration changes, Control, Login, etc.
Historical load data captured at a periodical
time interval (Demand interval 1 ...180min)
Min/max demand currents, Operation counters, etc.
12. Trip-circuit supervision
The trip-circuit supervision continuously monitors
the availability and operability of the trip circuit. It
provides opencircuit monitoring both when the
circuit breaker is in its closed and in its open
position. It also detects loss of circuit-breaker
control voltage.
13. Self-supervision
The relay's built-in self-supervision system
continuously monitors the state of the relay
hardware and the operation of the relay software.
Any fault or malfunction detected is used for
alerting the operator.
A permanent relay fault blocks the protection
functions to prevent incorrect operation.
PROCESS LEVEL
USER LEVEL
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