Carlo Gavazzi WM4-96 - Manual (Page 26)

■
VT-PT ratio
This function allows the
user to select the multiplier
value of the VT. Example: if
the primary of the VT (voltage
transformer) being connected is
20kV and the secondary is 100V,
the VT ratio will be 200 (given by
20000/100). If there is no VT, the
ratio will be “1.0”.
■
CT ratio
This function allows you to
select the value of the CT
ratio. Example: if the pri-
mary of the CT (current trans-
former) being connected is 300A
and the secondary is 5A, the CT
ratio corresponds to 60 (obtained
from the calculation: 300/5).
Choose the function CT RATIO by
means of the and keys;
press to confirm then select
the desired value by means of the
and keys and confirm
with . To reset your choice and
go back to the main menu, press
.
F
S
▼ ▲
S
▼ ▲
▲
▲
26
Programming
Min/Max values
21
Digital inputs prog.
17
28
33
If the CT ratio is modified, then all the MIN/MAX val-
ues and the partial energy meters are reset.
F
S ▼ ▲
F
S ▼ ▲
▼ ▲ 1.2..
..2.1 S