Technical Data Of Protection Functions - ABB REJ 527 Technical Reference Manual
Directional or non-directional earth-fault relay
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Also See for REJ 527:
- Technical reference manual (76 pages) ,
- Product manual (12 pages) ,
- Operator's manual (36 pages)
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ABB Substation Automation
Products and Systems
4.1.3.7.
1MRS750616-MUM
Technical Reference Manual
Technical data of protection functions
Table 11: Stage U
>
0b
Feature
Start voltage
• at definite-time characteristic
Start time, typical
Time/current characteristic
• definite time
• operate time t
>
b
Reset time
Drop-off/pick-up ratio, typical
Operate time accuracy at definite-time mode
Operation accuracy
• 2.0...80.0% x U
n
Table 12: Stages I
> or U
0
Feature
Operation direction of
stages I
> and I
>>
0
0
Mode of operation of
stages I
> and I
>>
0
0
Start current
• at definite-time
characteristic
• at inverse-time
1)
characteristic
Start voltage
• at definite-time
characteristic
> and I
>> or U
>>
0
0
0
1)
Stage I
>
or U
>
0
0
forward or reverse
directional or non-directional
1.0...100 % x I
n
1.0...40.0 % x I
n
2.0...80.0 % x U
n
REJ 527
Stage U
>
0b
2.0...80.0 % x U
n
70 ms
0.10...300 s
60 ms
0.96
±2 % of set value or ±25 ms
±3 % of set value +0.05 % x U
Stage I
>> or U
>>
0
0
forward or reverse
directional or non-directional
and ∞
5.0...400 % x I
n
2.0...80.0 % x U
n
n
31
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