Measurements; Configuration - ABB REF 610 Technical Reference Manual

1MRS755310
5.1.2.
5.1.3.
Feeder Protection Relay
Technical Reference Manual
The pulse length of the digital input signal does not affect time
synchronization.
If time synchronization messages are received from a communication
protocol as well, they have to be synchronized within ±0.5 minutes at
minute-pulse or ±0.5 seconds at second-pulse synchronization.
Otherwise the time difference may appear as rounding errors. If it is
possible that the synchronization messages from the communication
protocol are delayed more than 0.5 seconds, minute-pulse
synchronization must be used.
When the minute-pulse synchronization is active and long time format
is sent via a communication protocol, the protocol's second and
millisecond part is ignored. The protocol's minute part is rounded to
the nearest minute. Short time format is ignored altogether.
When the second-pulse synchronization is active and long or short time
format is sent via a communication protocol, the protocol's millisecond
part is ignored. The protocol's second-part is rounded to the nearest
second.

Measurements

The table below presents the measured values which can be accessed through the
HMI.
Table 5.1.2.-1 Measured values
Indicator
L1
L2
L3
I
0
ΔI
θ
I
1 minute
I
n minute
Max I

Configuration

The Fig. 5.1.3.-1 illustrates how the internal and digital input signals can be
configured to obtain the required protection functionality.
Description
Current measured on phase L1
Current measured on phase L2
Current measured on phase L3
Measured earth-fault current
Calculated phase unbalance
Calculated thermal level
The average current of the three phase-to-
phase currents during one minute
The average current of the three phase-to-
phase currents during the specified time range
The maximum of one-minute average current of
the I n_min
REF 610 REF 610
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