1MRS 750616-MUM
Directional or Non-Directional Earth-Fault Relay
Technical Reference Manual
REJ 527
37
.
4.1.4.7.
Technical data on protection functions
Table 4.1.4.6-10 Memory settings
Switch
Function
Default
setting
1
• 0 = alarm indication messages and LEDs will be cleared
• 1 = alarm indication messages and LEDs will be retained
1
2
• 1 = information on the “NUMBER OF STARTS” of the
protection stages will be retained
1
3
• 1 = disturbance recorder data will be retained
1
4
• 1 = event codes will be retained
1
5
• 1 = recorded data will be retained
1
6
Not in use
0
7
Not in use
0
8
Not in use
0
checksum
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Table 4.1.4.7-1
Stage U
0b
>
Feature
Stage U
0b
>
Set start value
• at definite-time characteristic
2.0...80.0% x U
n
Start time, typical
70 ms
Time/current characteristic
• definite time
operate time t
b
>
0.10...300 s
Resetting time, typical
60 ms
Drop-off/pick-up ratio, typical
0.96
Operate time accuracy at definite-time
characteristic
±
2% of the set start value or
±
25 ms
Operation accuracy
• 2.0...80.0% x U
n
±
3% of the set start value +0.05% x U
n
Table 4.1.4.7-2
Stages I
0
> or U
0
> and I
0
>> or U
0
>>
Feature
Stage I
0
>
1)
or U
0
>
Stage I
0
>> or U
0
>>
Operation direction of stages
I
0
> and I
0
>>
forward or reverse
forward or reverse
Operation mode of stages I
0
>
and I
0
>>
directional or non-directional directional or non-directional
Set start value
• at definite-time characteristic
1.0...100% x I
n
5.0...400% x I
n
3)
• at IDMT characteristic
1)
1.0...40.0% x I
n
2)
Set start value
• at definite-time characteristic
2.0...80.0% x U
n
2.0...80.0% x U
n
Содержание REJ 527
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