ABB M4M 20 User Manual page 33

M4M 20 NETWORK ANALYZER USER MANUAL
CT ratio - Manual data entry
→ →
Installation
CT ratio
Manual
40/5 A
50/5 A
60/5 A
2
CT ratio
4
CT ratio
6
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.
→
CT ratio
1. Use
2. Press
1
3. Enter the value of the primary with
4. Press
3
5. Enter the value of the secondary with
6. Press
5
to Select the option "Manual".
to confirm.
ENTER
to confirm.
ENTER
Max primary CT: 50.000
to confirm.
ENTER
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