
Table 167. Differential protection
Positio
n
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
0
0
0
0
0
0
0
0
0
Table 168. Differential functions
Function
Function
identification
Ordering no
Positi
on
Available
qty
Selected
qty
Notes
and rules
Transformer differential protection, two winding
T2WPDIF
1MRK005904-FB
5
1-2
Note:
One, and
only one
PDIF
must be
ordered.
Transformer differential protection, three winding
T3WPDIF
1MRK005904-GA
6
1-2
1Ph High impedance differential protection
HZPDIF
1MRK005904-HA
7
0-6
Restricted earth fault protection, low impedance
REFPDIF
1MRK005904-LC
9
0-3
Additional security logic for differential protection
LDRGFC
1MRK005904-TA
14
0-1
Table 169. Impedance protection
Po
siti
on
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
B
0
0
0
0
1MRK 504 155-BEN F
Transformer protection RET670 2.1 IEC
ABB
125