Table 237. Differential functions
Function
Function
identification
Ordering no
Position
Available
qty
Selected
qty
Notes and rules
High impedance differential protection, single phase
HZPDIF
1MRK005904-HB
6
00-03
Restricted earth fault protection, low impedance
REFPDIF
1MRK005904-LD
8
0-2
Line differential protection for 3 CT sets, 2-3 line ends
L3CPDIF
1MRK005904-MC
9
0-1
1)
Line differential protection for 6 CT sets, 3-5 line ends
L6CPDIF
1MRK005904-NC
10
0-1
Line differential protection for 3 CT sets, 2-3 line ends, inzone
transformer
LT3CPDIF
1MRK005904-PC
11
0-1
Line differential protection for 6 CT sets, 3-5 line ends, inzone
transformer
LT6CPDIF
1MRK005904-RC
12
0-1
High speed line differential protection for 4 CT sets, 2-3 line ends
L4CPDIF
1MRK005905-NB
13
0-1
Line differential protection logic
LDLPSCH
1MRK005904-SA
14
0-1
2)
Additional security logic for differential protection
LDRGFC
1MRK005904-TA
15
0-1
1)
Only one PDIF must be ordered. L4CPDIF requires line data communication in 2Mbps mode.
2)
Required with L3CPDIF, L6CPDIF, LT3CPDIF or LT6CPDIF
Table 238. Impedance protection
Position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
B
0
0
0
0
Line differential protection RED670
1MRK 505 379-BEN R
Version 2.2
Hitachi Energy
169
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание Relion 670 Series
Страница 1: ...Relion 670 SERIES Line differential protection RED670 Version 2 2 Product guide ...
Страница 191: ...191 ...