7.6- Doing the test
Once we have selected the parameters explained before, we will press “START” and the
equipment will start to do the complete cycle:
a) If the stirring function is selected, the oil sample will be stirred for 60 seconds. After this
time the "STIRRER" light will go off and another 60 second waiting period will start to
remove turbulence in the oil.
b) If the stirring function is not selected or it has finished, the "--,-" symbol on the display will
disappear and the increasing voltage ramp will start until the oil is perforated or, if this
does not occur, until the equipment reaches 60 kV. Then the cycle will stop and the
"STOP" light comes on.
If during the increasing voltage ramp, the oil sample is perforated, then the display will
retain the voltage at which the perforation occurred, the "ARCH" light is lit and an alarm
goes off cutting the high voltage. The "ARCH" light remains on until the "STOP" button is
pressed.
Once the "STOP" button is pressed the value on the display is lost and the "--,-" symbol
reappears, therefore, is better to write down the value before it disappears.
Remarks:
It is important to respect the times of the automatic program. If we are
doing tests stopping the cycle by means of the turn of the key without waiting the
necessary time until the next test, we are overloading the transformer and it can be
damaged.
