accessed, either locally or remotely, using the
web-browser based user interface.
10. Recorded data
The IED has the capacity to store the records
of 32 latest fault events. The records enable
the user to analyze the power system events.
Each record includes current, voltage and
angle values, time stamp, etc. The fault
recording can be triggered by the start signal
or the trip signal of a protection block, or by
both. The available measurement modes
include DFT, RMS and peak-to-peak. In
addition, the maximum demand current with
time stamp is separately recorded. By default,
the records are stored in a non-volatile
memory.
11. Condition monitoring
The condition monitoring functions of the
IED constantly monitors 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
CB history data, which can be used for
scheduling preventive CB maintenance.
In addition, the IED includes a running time
counter for monitoring of how many hours
the motor has been in operation thus
enabling scheduling of time-based preventive
maintenance of the motor.
12. Trip-circuit
supervision
The trip-circuit supervision continuously
monitors the availability and operability of
the trip circuit. It provides open-circuit
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 IED’s built-in self-supervision system
continuously monitors the state of the IED
hardware and the operation of the IED
software. Any fault or malfunction detected
will be used for alerting the operator.
A permanent IED fault will block the
protection functions to prevent incorrect
operation.
14. Fuse failure
supervision
The IED includes fuse failure supervision
functionality. The fuse failure supervision
detects failures between the voltage
measurement circuit and the IED. The
failures are detected by the negative-
sequence based algorithm or by the delta
voltage and delta current algorithm. Upon the
detection of a failure the fuse failure
supervision function activates an alarm and
blocks voltage-dependent protection
functions from unintended operation.
Motor Protection and Control
1MRS756890 D
REM615
Product version: 3.0
Issued: 2010-06-29
ABB
15
Содержание RELION REM615
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