PD-TaD 62
Connecting the system
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6.7
Points to note during connection
The following factors are crucial for precise measurement results:
Short connections
Protective earthing cable should be a flat copper strip (standard delivery)
Maximum possible distance between the connection cables and the adjacent system
components not to be tested
Keep the HV coupling unit of the PD-TaD 62 and the terminations clean and dry
No current loops in the power supply
6.8
Use of the anti-corona protection
To achieve measurement results that are as precise as possible, we recommend using the
anti-corona protection device. Corona discharges on sharp edges in a test setup may cause
a high noise level. The anti-corona hoods included within the standard delivery protect
sharp-edged parts in order to prevent corona discharges affecting the measurement result.
6.9
Earth system
Note:
All the necessary connection cables and connecting elements are included in the
standard delivery.
1. A 16 mm
2
protective earthing cable is included in the standard delivery of the
PD-TaD 62. Use this cable to connect the protective earthing connection of the
PD-TaD 62 to the station earth (directly on the test object screen).
Important:
To keep the antenna effect to a minimum and thus prevent interference, the
protective earthing cable must be a flat copper strip which is kept as short as possible.
2. Earth the VLF HV generator. Follow the user manual for the VLF HV generator in
question.
3. A short-circuit cable is secured to the earthing terminal on the PD-TaD 62. Connect this
short-circuit cable to the
HV IN
and
HV OUT
ports.
4. If you are using a VLF HV generator with a 50 m long HV connection cable, connect the
screen (operational earthing) of the HV connection cable to the
Screen (HV Cable)
port
of the PD-TaD 62.
6.10 Connecting the system for PD measurement
6.10.1 Connecting the system to the frida VLF HV generator
Prerequisites
The workplace must be de-energised, earthed and short-circuited.
Further information: Chapter
Ensuring there is no voltage at the work place
(on page 33)
The connection points and far end are prepared for the measurement tasks.
Further information: Chapter
Preparing the test object terminals
(on page 33)
HV coupling unit of PD-TaD and the cable terminations of the test object are clean and
dry.
Further information: Chapter
Cleaning the PD-TaD 62 and system components
(on page
