15
Model UT233: OPERATING MANUAL
Figure 4
Insert red test leads to
V1
input terminal.
Insert blue test leads to
V2
input terminal
Insert yellow test leads to
V3
input terminal
Connect red blue and yellow test leads to every
live wire of the 3 phase.
Insert black test leads to
COM
input terminal and
connect it to the neutrual wire of the 3
phase.
You must specify that this connection is used
when the main transformer have STAR connection.
Black
Red
Blue
Yellow
