ABB REF 610 Technical Reference Manual page 59

1MRS 755535
Feeder Protection Relay
Technical Reference Manual - ANSI Version
Table 4.1.4.11-1 Elements 51P, 50P-1 and 50P-2
Feature
Operation accuracy
• 0.3...0.5 x
I (CT)
n
• 0.5...5.0 x
I (CT)
n
• 5.0...35.0 x
I (CT)
n
1)
At IDMT (mode) characteristic, the relay allows settings above 2.5 x I
regards any setting >2.5 x I
2)
Resetting time of the trip signal.
Element 51P Element 50P-1
±5% of the set
pickup value or
0.05%
I (CT)
n
±3% of the set ±3% of the set
pickup value pickup value
±3% of the set
pickup value
(CT) as equal to 2.5 x I (CT).
n n
REF 610
Element 50P-2
±3% of the set
pickup value
±3% of the set
pickup value
(CT) for element 51P, but
n
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