ABB M4M 30 User Manual page 29

M4M 30 NETWORK ANALYZER USER MANUAL
CT ratio - Manual entry
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Installation
2a
3
If the CT is replaced varying the value of the transformation ratio, before proceeding it is recommended to:
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.
Please notice that if M4M 30 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 L1 L2 L3
1. Select the option "Manual".
1
2. Scroll the numerical values available in either
ascending or descending order until the
required number is obtained. Insert a value
between 1 A and 999999 A for the primary,
select 1 A or 5 A for the secondary. The
default values are 5 for the primary and 5 for
the secondary.
3. Press Confirm to confirm the modification.
2b
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