Operation
32
4.5.4
Burning -
This mode allows manual control of the output voltage during HV operation.
Due to the high thermal stress which goes along with the burning process, the burn
duration is limited to 5 minutes.
In preparation of the burning process, the following parameters must be set:
Menu item Description
Voltage
The voltage can be set bipolar (see page 23) within the range of
−
10 kV to
+10 kV. The voltage value of the previous test should be used.
Current
To prevent damage to the cable sheath, the current can be limited.
Proceed as follows to operate the device in burning mode:
Step
Description
1
In the main menu, call up the menu item
.
2
Set the voltage and the current.
3
Start the test via the menu item
.
4
Press the “HV ON” push-button
.
Result:
The test voltage is ramped up and the cable shield charged.
The respective voltage applied and the current passing through are shown in
the display.
Via the
menu item, the output voltage can be changed during
burning
which makes it possible to observe the response of the fault in real-time.
To avoid interruption of the burning process, polarity should not be
changed during burning.
5
Terminate the burning process by pressing the “HV OFF” push-button .
The burning process will stop automatically after 5 minutes, if by this time it
hasn’t been stopped manually.
CAUTION
Between two time-consuming burning operations the unit needs
to cool down for a few minutes!
6
Afterwards, try to prelocate (see page 28) the sheath fault again.
Introduction
Measuring parameters
Procedure
