ABB
12
Feeder Protection and Control
REF615
Product version: 2.0
1MRS756379 D
5. Control
The IED offers control of one circuit breaker
with dedicated push-buttons for opening and
closing. Interlocking schemes required by
the application are configured with the signal
matrix tool in PCM600.
6. Measurement
The IED continuously measures the phase
currents, the symmetrical components of the
currents and the residual current. If the IED
includes voltage measurements it also meas-
ures the residual voltage, the phase voltages
and the voltage sequence components. In
addition, the IED calculates the maximum
demand value over a user-selectable pre-set
time frames, the thermal overload of the pro-
tected object, and the phase unbalance value
based on the ratio between the negative
sequence and positive sequence current.
The values measured can be accessed locally
via the user interface on the IED front panel
or remotely via the communication interface
of the IED. The values can also be accessed
locally or remotely using the web-browser
based user interface.
7. Disturbance recorder
The IED is provided with a disturbance
recorder featuring up to 12 analog and 64
binary signal channels. The analog channels
can be set to record either the waveform or
the trend of the currents and voltage meas-
ured.
The analog channels can be set to trigger the
recording function when the measured value
falls below or exceeds the set values. The
binary signal channels can be set to start a
recording on the rising or the falling edge of
the binary signal or both.
By default, the binary channels are set to
record external or internal IED signals, e.g.
the start or trip signals of the IED stages, or
external blocking or control signals. Binary
IED signals such as a protection start or
trip signal, or an external IED control signal
over a binary input can be set to trigger the
recording. The recorded information is stored
in a non-volatile memory and can be upload-
ed for subsequent fault analysis.
8. Event log
To collect sequence-of-events (SoE) infor-
mation, the IED incorporates a non-volatile
memory with a capacity of storing 50 event
codes with associated time stamps. The
non-volatile memory retains its data also in
case the IED temporarily loses its auxiliary
supply. The event log facilitates detailed pre-
and post-fault analyses of feeder faults and
disturbances.
The SoE information can be accessed locally
via the user interface on the IED front panel
or remotely via the communication interface
of the IED. The information can further be
accessed, either locally or remotely, using the
web-browser based user interface.
9. Recorded data
The IED has the capacity to store the records
of four fault events. The records enable the
user to analyze the four most recent power
system events. Each record includes the cur-
rent and voltage values, the start times of the
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