Megger TDS40, Operating Manual, Page: 13 / 71

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2. TECHNICAL DESCRIPTION
2.1 Description of the Functions
The test and diagnosis system TDS40/60 enables the standard-compliant testing of
medium voltage cables and other equipment with a 0.1 Hz cosine rectangular test
voltage of up to 40 kV
PEAK
or 60 kV
PEAK
.
With the help of such a cable test, operation-endangering faults as well as insulation
faults (e.g. water tree damages in PE/XLPE cables or local damages in PILC cables) can
be safely brought to failure. Due to the integrated breakdown detection, this test process
takes place without damage to the fault-free cable insulation.
In combination with the partial discharge measurement system PDS 60, the TDS40/60
forms a fully adequate diagnosis system (TDS NT) which is suitable for the partial
discharge diagnosis on medium voltage cables according to the standards. In this stage
of expansion the system is operated by remote control and can be operated in the VLF or
DAC (damped AC) mode.
This manual solely describes the operation of the test and diagnosis system
TDS40/60 in the stand-alone test operation. For information regarding the
connection of the partial discharge measurement system PDS 60 and the remote
operation of the system please read the manual of the PDS 60.
2.2 Model Options
The model options of the test and diagnosis system differ in the following attributes:
TDS40Basis
40 kV test voltage; only negative voltage source
TDS40Plus
40 kV test voltage; negative and positive voltage source (higher test
performance as a result)
TDS60Basis 60 kV test voltage; only negative voltage source
TDS60Plus 60 kV test voltage; negative and positive voltage source (higher test
performance as a result)