Technical Data On Protection Functions; Elements 51P, 50P-1 And 50P-2 - ABB REF610 Technical Reference Manual

1MRS755535
5.1.4.11.
Feeder Protection Relay
Technical Reference Manual - ANSI Version
Setting Switch Function
4
5
Σ
a)
The prerequisite is that the battery has been inserted and is charged.
When all switches are set to zero, the battery supervision is disabled.

Technical data on protection functions

Table 5.1.4.11.-1

Elements 51P, 50P-1 and 50P-2

Feature
Set pickup value, 51P,
50P-1 and 50P-2
at definite-time
*
characteristic
at IDMT characteristic
*
Pickup time, typical
Time/current characteristic
definite-time
*
operate time, 51P TDLY,
50P-1 TDLY and 50P-2
TDLY
IDMT (mode) according
*
to IEC 60255-3
time dial, 51P TD IEC
Special type of IDMT
*
(mode) characteristic
time dial, 51P TD IEC
IDMT (mode) according
*
to IEEE C37.112
time dial, 51P TD ANSI
Resetting time, maximum 50 ms
Retardation time, typical
Set resetting time, 51P
RSET
Drop-off/pick-up ratio,
typical
Operate time accuracy
1 = recorded data and information on the
*
number of pickups of the protection
elements are retained
1 = the real-time clock is running also
*
during loss of auxiliary voltage
Element 51P Element 50P-1
0.30...5.00 x I (CT) 0.50...35.0 x I
n
a)
0.30...2.50 x I (CT)
n
55 ms 30 ms
0.05...300 s 0.04...300 s
Extremely inverse
Very inverse
Normal inverse
Long-time inverse
0.05...1.00
RI-type inverse
RD-type inverse
(RXIDG)
0.05...1.00
Extremely inverse
Very inverse
Inverse
1...15
b)
50 ms
30 ms 30 ms
0.05...2.50 s
0.96 0.96
REF610 REF610
Default setting
1
1
a)
31
Element 50P-2
(CT) 0.50...35.0 x I (CT)
n n
30 ms
0.04...300 s
50 ms
30 ms
0.96
69