Ct Ratio - ABB M4M 30 User Manual

28 M4M 30 NETWORK ANALYZER USER MANUAL

6.5.CT ratio

M4M is capable to measure current only via indirect connection by means of current transformers
CTs.../5A or .../1A (M4M 30 Modbus, M4M 30 Ethernet, M4M 30 I/O, M4M 30 Profibus, M4M 30 Bacnet), or
Rogowski coils (M4M 30 Rogowski).
If CTs are used, then on the network analyzer it is needed to set the transformation ratio of the installed
current transformers.
If Rogowski coils are used (M4M 30 Rogowski), it is not needed to set any transformation ratio.
In order to configure the current transformers ratio it is possible either to choose the values from a list of
values (default settings) or to manually enter a value.
CT ratio - Default values
2
Default values of CT ratio L1 L2 L3
40/5
50/5
60/5
80/5
100/5
150/5
→ → →
Installation CT ratio L1 L2 L3
1. Scroll the list of values
2. Select one option
1
Default values of CT ratio L1 L2 L3
200/5
250/5
400/5
600/5
800/5
1000/5