Installation and Connection
The current measuring inputs may exclusively be connected to current
measuring transformers (with galvanic separation).
CT secondary circuits must always to be low burdened or short-circuited
during operation.
For current and voltage sensing function external wired and appropriate
current and voltage transformer shall be used, based on the required input
measurement ratings. Those devices provide the necessary insulation
functionality.
All current measuring inputs can be provided with 1 A or 5 A nominal.
Make sure that the wiring is correct.
Current Transformer Connection Examples
EN MRM4 01/11
Page 41
L1
L2
L3
IL1
IL2
IL3
1
X3.
2
3
4
5
6
7
8
9
10
11
12
Three phase current measurement; In secondary = 5 A.
IL1
1A
5A
N
IL2
1A
5A
N
IL3
1A
5A
N
IG
1A
5A
N
IL2'
IL3'
IL1'
IG calc = IL1 + IL2 + IL3 = IG
Содержание MRM4
Страница 1: ...MRM4 HighPROTEC Motor Protection Device Manual DOK HB MRM4E...
Страница 3: ...Order Code EN MRM4 01 11 Page 3...
Страница 18: ...Important Definitions Page 18 EN MRM4 01 11 41 SG Prot ON 42 SG ON Cmd SG Prot ON SG ON Cmd...
Страница 115: ...Navigation Operation Navigation Operation EN MRM4 01 11 Page 115 1 2 3 5 7 6 8 10 9...
Страница 162: ...Recorder Name Description I 2 TripCmd Signal Trip Command Page 162 EN MRM4 01 11...