Settings - ABB REU 523 Technical Reference Manual

1MRS 750942-MUM
4.1.3.6.
ABB Automation
Combined Overvoltage and Undervoltage Relay
Technical Reference Manual
k<, k<<
2,0
1,4
1,0
0,7
0,4
0,2
0,1
U/U<,
0,5
0,6
U/U<<
)LJ  7\SH & FKDUDFWHULVWLFV

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 parameter 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 by applying an
adjustable voltage to the matching transformers of the relay. Refer to chapter "Check
Lists" beginning from page 55.
0,7
0,8
REU 523
1000
100
10
1
0,1
0,01
0,9 1,0
19