wrong result: the red socket (output or input) is the positive; with
the clip-on transformer, look at the arrow or at the red mark
(entering current).
Now, input in the screen:
. The primary and secondary current;
. The secondary current metering method: if the current clamp is
enabled, the clamp’s ratio (1000 to 1 for our option);
. The secondary voltage measurement input.
BEFORE STARTING THE TEST, VERIFY THAT THE SECONDARY
CIRCUIT IS CLOSED: THE CT GENERATES HIGH VOLTAGE IF
THE PRIMARY CURRENT IS INJECTED AND THE SECONDARY IS
OPEN!
Press test start button (56), and adjust the primary current to the
desired value by the adjustment knob (6). The screen shows:
. The primary current;
. The secondary current;
. The transformer’s ratio;
. The ratio percentage error with respect to the nominal;
. The polarity, as OK or KO.
You will notice that the % error does not change very much as a
function of the test current.
Keep the test duration as short as possible: if you exceed the
above table, the test set stops automatically the test, and you
have to wait until the recover time is elapsed. Also, consider that
you are sinking power from the mains supply: the supply cable
wires should have a cross section suitable for a current supply of
10 to 20 A. The following table lists the current supply at full
power.
RANGE
A
OUTPUT
A
I SUPPLY
A
1000 500 5.6
1000 11.3
2000 1000 5.6
2000 11.3
When you are satisfied with the result, press SAVE: test result is
saved. Return to zero the adjustment knob (6).
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