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
1)
The start and the tripping of the low-set earth-fault current stage can be blocked by the starting of the
high-set stage, provided that this function has been selected in SGF. If set in SGF, the operate time
will be determined by the set operate time of the high-set stage at heavy fault currents. In order to
obtain a trip signal, the high-set stage must be routed to PO1 or PO2.
2)
At IDMT characteristic, the relay allows settings above 40.0% x I
n
for stage I
0
>, but regards
any setting > 40.0% x I
n
as equal to 40.0% x I
n
.
3)
The stage can be set out of operation in SGF. This state will be indicated by dashes on the LCD and
by “999” when parameters are read via the SPA bus.
4.1.5. Indicator LEDs and alarm indication messages
The operation of the REJ 527 can be monitored by means of three indicators on the
front panel of the relay: a green READY indicator LED, a yellow START indicator
LED and a red TRIP indicator LED (refer to the Operator’s Manual for a more
thorough presentation).
Start time, typical 70 ms 60 ms
Time/current characteristics
• definite time
operate times t
0
> and t
0
>> 0.10...300 s 0.10...300 s
• IDMT for stage I
0
> as per IEC
60255-3
Extremely inverse
Very inverse
Normal inverse
Long-time inverse
• special type of inverse-time
characteristic
time multiplier k of stage I
0
>
RI-type inverse
RD-type inverse
0.05...1.00
Selectable resetting time 80, 100, 500 or 1000 ms 100 ms
Drop-off/pick-up ratio, typical 0.96 0.96
Operate time accuracy at
definite-time characteristic
±
2% of the set start value
or
±
25 ms
±
2% of the set start value
or
±
25 ms
Accuracy class index E at IDMT
characteristic 5
±
25 ms
Operation accuracy
• 1.0...100.0% x I
n
±
3% of the set start value
+0.05% x I
n
±
3% of the set start value
+0.05% x I
n
• 2.0...80.0% x U
n
±
3% of the set start value
+0.05% x U
n
±
3% of the set start value
+0.05% x U
n
Table 4.1.4.7-3 Directional element
Feature Setting range
Setting range of the basic angle
ϕ
b
-90
...
0
°
Operation sector
ϕ
b
±
80
°
or
±
88
°
with the extended
sector
ϕ
a
0
...
90
°
Operation sector accuracy
±
5
°
Threshold current for angle measurement
• pick-up/drop-off 0.50/0.30%
Threshold voltage for angle measurement
• pick-up/drop-off 0.48/0.36%
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
>>