Megger DELTA4000, Instruction Manual, Page: 39 / 74

Delta Control User Interface
AVTMDELTA4000-EN Rev 6 April 2018
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Frequency and Temperature
This is where you specify at which test frequency you want to perform the test.
This is in most cases the same as the network frequency (but if you would like to
test at e.g. 55 Hz you simply enter 55). Note that "Line Frequency" in the setting
tab must be set to actual line frequency, 50Hz or 60 Hz.
Insulation properties are temperature dependent and the test object temperature
is a very important parameter. The average temperature of the test object
insulation should be entered.
These two parameters need to be set in order to start a measurement.
Test Type
Select which Test you want to perform. In the setting tab you set your preference
for tan delta or power factor readings.
The available tests are:
Power Factor/
Tan-Delta
Power Factor or Tan-Delta test is a semi
automatic test sequence performed at a preset
voltage and line frequency. The system will
ramp up the voltage to the set voltage and
measure the Power Factor or Tan-Delta and
after the completed test, ramp voltage down
and stop the test and present the result.
Excitation Current An excitation current is a standard test that is
helpful in determining winding or core
problems in transformers.
Auto Tip-up Test Tip-up testing is used for testing power
components with voltage dependent dissipation