Vt Ratio - ABB M4M 20 User Manual

34 M4M 20 NETWORK ANALYZER USER MANUAL

7.6.VT ratio

M4M is capable to measure voltage via direct connection up to 400 VL-N (690V L-L), or via indirect
connection by means of voltage transformers.
In order to configure the voltage transformer ratio it is needed to enter manually the values of both
primary and secondary. The default values are 400 for the primary and 400 for the secondary.
Enter the password if necessary.
In case of direct insertion, up to 500V phase-neutral, without voltage transformers set 100/100 (default) as
value.
→ → →
Installation
2
4
VT ratio
1. Enter the value of the primary with
2. Press
1
3. Enter the value of the primary with
4. Press
3
to confirm.
ENTER
Max primary VT: 500.000
Max secondary VT: 999
to confirm.
ENTER