CIRCUTOR CVM144 Series - Manual (Page 25)

----- Supply network analyzer CVM-144 ------ User's manual --- Page No. 24
NOTES:
- The secondary of the current transformers is not programmable. It is
automatically set at 5 A (... / 5 A ac)
- The primary current value to be set is also limited by the following
condition: The maximum allowable primary current value which can be set
is defined by the fact that the multiplication of the primary voltage value by
this primary current value cannot exceed 20,000,000.
6.5.- Transformation ratio for the measurement of neutral and residual
current
This section is only applicable for the CVM-144 units equipped with the
module for residual and neutral current measurement (7 70 572, 7 70 575 & 7
70578)
6.5.1.- Primary of the current transformer for neutral current measur. (I
N
)
The screen shows the message "A_n P" and fixe numeric digits that permit
the user to set the value of the current transformer for the neutral current
measurement.
A_n
P - -
- - -
1 A ... 10.000 A
a) To enter or modify the value of the C.T.'s primary, just repeatedly press "max" to
increase the value of the blinking digit.
b) When the value in screen is the required, pass to the next digit by pressing "min",
so that the whole value can be set.
c) When the last digit blinks, pressing then "min" the first digit is again accessed, so
that set value can be modified if required.
d) To access next set-up option press " ".
NOTES:
- The secondary of the current transformers is not programmable. It is
automatically set at 5 A (... / 5 A a.c.)