Code: Seba-KMT OWTS-M28
Description
OWTS M28 Pro
Dielectric Diagnosis and Partial Discharge Measuting System
The OWTS can also be coupled with a VLF System. In this case the VLF provides, controlled by the OWTS, the High Voltage supply.
Key Benefits:
Description
The oscillating wave test system OWTS is used to identify,
evaluate, and locate partial discharge (PD) faults in
cable insulation and accessories in all types of medium
voltage cables.
The system consists of a notebook as a WLAN control
unit and a HV unit.
The HV unit contains a HV source and a resonance inductor
with an integrated electronic switch to generate the
AC test voltage. The HV divider and an embedded controller
for the digital data acquisition and PD signal processing
is integrated.
The storage, analysis and evaluation of the PD signals
takes place in the notebook and can be done either on
site or in the office.
The PD fault location is based on the time domain reflection
method.
For the PD diagnosis the test object is charged to the preselected
peak value by a HV source within a couple of
seconds and afterwards shorted with an electronic switch
via a resonance coil. Thus a sinusoidal oscillating
AC voltage with low damping is created (DAC). The frequency
is fixed in a range from 50 Hz to several 100 Hz,
depending on the capacitance of the test object. Since the
frequency of the test voltage is close to nominal service
conditions, all measured PD activities can be effectively
evaluated.
The oscillating voltage energizes the test object only for a
few 100 ms and therefore causes no long-term influences.
Due to the decaying amplitude of the test voltage, the
PD extinction voltage and the tan d-value can be easily
determined. Critical PD levels responsible for the future
status of the cable insulation are important criteria in the
evaluation.
The analysis and evaluation of the typical PD parameter
as well as the PD fault location supports the Asset Management
for reliable decision criteria for maintenance or
replacement activities.
Standard accessories
Scope of delivery
?? HV unit
?? Notebook with WLAN connection to the HV unit
?? Safety-Box with HV ON/OFF; Emergency push button
and key switch
?? Accessory bag
?? Operating manual
?? 5 m HV test lead; power supply- and grounding cable
?? OWTS Explorer package, 2 Dongle CD-ROM
?? Calibrator
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