Settings - ABB REJ 523 Technical Reference Manual

ABB Substation Automation
Products and Systems
4.1.3.3
1MRS750940-MUM
Technical Reference Manual

Settings

Two alternative setting groups, 1 and 2, are available for the relay. Either of these
setting groups can be used as the actual settings, one group at a time. Both the groups
have their related registers. Switching between the setting groups 1 and 2 enables
changing a whole group of settings at the same time. This can be done in any of the
following ways:
1. Via the MMI.
2. With command V150 via serial communication.
3. By means of an external binary input BI.
Values of the settings are altered via the MMI or with a personal computer provided
with the Relay Setting Tool.
Before the relay is connected to a system, one must assure that the relay has been
given correct settings. If there is any doubt about the settings, the setting values
should be read with the relay trip circuits disconnected or tested with current
injection. Refer to "Check lists".
Table 4.1.3.3-1 Setting values
Setting Description
I>/I Start current of stage I> as a
n
multiple of the energizing input
used.
- definite-time
- inverse-time
t> Operate time of stage I> in
seconds at definite-time
characteristic.
k Time multiplier k of stage I> at
inverse-time characteristic.
I>>/I Start current of stage I>> as a
n
multiple of the energizing input
used.
t>> Operate time of stage I>> in
seconds.
CBFP Circuit-breaker failure protection
1)
At inverse-time characteristic the relay allows settings above the set limit.
However, applying settings above the limit might damage the relay.
Setting range Default
setting
0.30...5.00 x I 0.30 x I
n
1)
0.30...2.50 x I 0.30 x I
n
0.05...300 s 0.05 s
0.05...1.00 0.05
0.30...35.0 x I 0.30 x I
n
and ∞
2)
0.04...300 s 0.04 s
0.10...1.00 s 0.10 s
REJ 523
n
n
n
23