CIRCUTOR CVM144 Series - Manual (Page 26)

----- Supply network analyzer CVM-144 ------ User's manual --- Page No. 25
6.5.2.- Residual current measuring range: 3 A or 30 A
You will view in screen the message "SET A_L". Set then the right measuring
range of the residual current input to which the WG transformer has been
connected..
Two possible values are available (the choice must coincide with the
measuring transformer wiring): 3 A or 30 A.
SEt
A_L
- - -
3 A or 30 A
a) To select the appropriate input / range just press the key "max", the value will
switch from one option to the other one.
b) To pass to the next option press " ".
NOTE :
• For the measurement of the residual current (earth leakage current), the use of
transformers of the WG xx series is required. These transformers can be
connected to the 3 A or 30 A rated input, depending on the needed measuring
range.
• For the measurement of the neutral current, the use of .../5A current transformers
is required.