Megger VLF SIN-45 - Sheath Test

Operating Modes
37
5.2.1 Sheath Test
During the test, the voltage curve (blue) and the current curve (red) are logged in the
display area in real time. The display area of the diagram can be increased or be
reduced by means of the menu item .
Depending on the operating mode, a few relevant parameters and measured values are
displayed next to the diagram:
Symbol Description
/
Remaining test time / current test duration (in continuous operation mode)
Leakage current
If a test time was defined, the high voltage is automatically switched off at the end of this
time. In continuous operation mode, it must be switched off manually using the “HV Off”
button or the menu item .
Irrespective of whether the high voltage is switched off automatically or manually, the
high voltage output is earthed and the test object is discharged by means of an internal
discharge-resistor.
The test data logged up to the switch-off are recorded in the history database (see page
29) and, if necessary, on the inserted USB flash drive as well.
If the leakage current values measured during the test are above the limits specified by
the cable owner, the tested cable should be examined in more detail soon or at least a
shorter testing cycle should be introduced.
Performing the test
Finishing the test
Evaluating the test
results