ABB REJ 527, Техническое справочное руководство

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1MRS 750616-MUM Directional or Non-Directional Earth-Fault Relay
Technical Reference Manual
REJ 527
29
4.1.4.6. 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 current injection, refer to section
Check lists for additional information.
Table 4.1.4.6-1 Setting values
Setting Description Setting range Default setting
U
0b
>/U
n
Set start value of stage U
0b
> as a
percentage of the energizing input used
• definite time 2.0...80.0% x U
n
2.0% x U
n
t
b
> Operate time of stage U
0b
> in seconds at
definite-time characteristic
0.10...300 s 0.10 s
I
0
>/I
n
Set start value of stage I
0
> as a
percentage of the energizing input used
• definite time 1.0...100% x I
n
1.0% x I
n
• inverse time 1.0...40.0% x I
n
1.0% x I
n
U
0
>/U
n
Set start value of stage U
0
> as a
percentage of the energizing input used
• definite time 2.0...80.0% x U
n
2.0% x U
n
t
0
> Operate time of stage I
0
> or U
0
> in
seconds at definite-time characteristic
0.10...300 s 0.10 s
k> Time multiplier k of stage I
0
> at
IDMT characteristic
0.05...1.00 0.05
I
0
>>/I
n
Set start value of stage I
0
>> as a
percentage of the energizing input used
• definite time
5.0...400% x I
n
2) 5.0% x I
n
U
0
>>/ U
n
Set start value of stage U
0
>> as a
percentage of the energizing input used
• definite time 2.0...80.0% x
U
n
2)
2.0% x U
n