ABB M4M 20 - Page 33

M4M 20 NETWORK ANALYZER USER MANUAL
33
CT ratio - Manual data entry
→ → Installation → CT ratio
Manual
40/5 A
50/5 A
60/5 A
CT ratio
1. Use to Select the option “Manual”.
2. Press
ENTER
to confirm.
CT ratio
3. Enter the value of the primary with
4. Press
ENTER
to confirm.
Max primary CT: 50.000
CT ratio
5. Enter the value of the secondary with
6. Press
ENTER
to confirm.
If the CT is replaced varying the value of the transformation ratio, before proceeding we recommend:
1. Note down the value of the energy counts accumulated with the previous ratio.
2. Reset the energy counts.
3. Insert a new value of the transformation ratio.
Enter the password if necessary.
Please notice that if M4M 20 Rogowski is being used, no CT ratio has to be set for Rogowski coils.
Primary of CT has to be higher than the secondary.
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