47
Table 5.1.4.8.-2
Undervoltage protection, elements 27P-1, 27P-2 and
27D
Feature
Element 27P-1
Element 27P-2
Element 27D
Set pickup value 27P-1, 27P-2
and 27D:
-at definite-time characteristic
0.20...1.20
×
U
n
(VT)
0.20...1.20
×
U
n
(VT)
0.20...1.20
×
U
n
(VT)
-at IDMT characteristic
0.20...1.20
×
U
n
(VT)
0.20...1.20
×
U
n
(VT)
0.20...1.20
×
U
n
(VT)
Pickup time, typical
80 ms
50 ms
50 ms
Time/voltage characteristic:
-at definite operate time, 27P-1
TDLY and 27P-2 TDLY
0.10...600 s
0.10...600 s
0.10...600 s
-IDMT
curve C
curve C
curve C
time dial 27P-1 TD and 27P-2
TD
0.10...2.00
0.10...2.00
0.10...2.00
Resetting time, typical/
maximum
70/80 ms
a)
70/80 ms
70/80 ms
Retardation time, typical
30 ms
30 ms
50 ms
Set resetting time, 27P-1
RESET
0.07...60.0 s
-
-
Drop-off/pick-up ratio, 27P-1
D/P
1.01...1.05
1.01...1.05
1.04
Operate time accuracy:
-at definite-time characteristic
±
2% of the set
operate time or
±
25 ms
±
2% of the set
operate time or
±
25 ms
±
2% of the set
operate time or
±
25 ms
-at IDMT characteristic
±
25 ms or the
accuracy
appearing when
the measured
voltage varies
±
3%
±
25 ms or the
accuracy
appearing when
the measured
voltage varies
±
3%
±
25 ms or the
accuracy
appearing when
the measured
voltage varies
±
3%
Operation accuracy
±
1.5% of the set
pickup value
±
1.5% of the set
pickup value
±
5% of the set
pickup value
a)
Resetting time of the trip signal.
Table 5.1.4.8.-3
Residual overvoltage protection, elements 59N-1 and
59N-2
Feature
Element 59N-1
Element 59N-2
Set pickup value 59N-1 and 59N-2:
-at definite-time characteristic
2.0...80% U
n
(VT)
2.0...80% U
n
(VT)
Pickup time, typical
70 ms
60 ms
Time/voltage characteristic:
-definite-time operate time, 59N-1
TDLY, 59N-2 TDLY
0.10...600 s
0.10...600 s
Resetting time, typical/maximum
30/50 ms
a)
30/50 ms
a)
1MRS755972
Voltage Relay
Technical Reference Manual - ANSI Version
REU 610
Summary of Contents for REU 610
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