ISA T 2000 - Page 15

DOC. MIE11110 Rev. 5
Page
15
of
110
. The transformer ratio;
. The percentage ratio error with respect to the nominal;
. The polarity, as OK or KO. You will notice that the % error does
not change as a function of the test voltage.
When you are close to VSM/2, press SAVE: test result is saved,
and voltage is removed. Return to zero the adjustment knob (6),
and turn off the HV key (28).
Please remember that if the test current is more than 0.2 A aT
2000 V, the test duration will be limited, as per the following table.
VOLTAGE
OUTPUT
VOLTAGE
OUTPUT
CURRENT
OUTPUT
A
OUTPUT
POWER
VA
LOAD
TIME
Min
RECOVERY
TIME
min
3000
2500
0.2
0.6
600
1500
STEADY
1
-
8
The one minute duration at 0.6 A is more than enough for the
test, so, it is no practical limitation. However, for higher currents
the duration could not be sufficient for the test.
If, when the test START button (56) is pressed, the HV key is
already ON, the following message is displayed:
In this instance, press the STOP button (55), turn OFF the HV key
(28), then press test START button (56).
If, during the test, you want to make sure that the applied
voltage is not such to cause the saturation of the transformer,
select EXCIT: the screen will become the following one.