Settings - ABB REU 523 Technical Reference Manual

REU 523
4.1.4.6.
20
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<<
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Settings

There are two alternative setting groups available, setting groups 1 and 2. Either of
these setting groups can be used as the actual settings, one at a time. Both groups
have their related registers. By switching between the setting groups a whole group
of settings can be changed at the same time. This can be done in any of the following
ways:
Group configuration:
• via the HMI
• entering parameter V150 via serial communication
Group selection:
• switching between Group1 and Group2 is accomplished by means of the external
binary input
The setting values can be altered via the HMI or with a personal computer provided
with the Relay Setting Tool. Before the relay is connected to a system it must be
assured that the relay has been given the correct settings. If there is any doubt, the
setting values should be read with the relay trip circuits disconnected or tested with
voltage injection; refer to section Check lists for additional information.
0,7
0,8
1MRS 750942-MUM
1000
100
10
1
0,1
0,01
0,9 1,0