Megger/HDW/SebaKMT OWTS HV150, 150 kV PD Tester for HV Cables

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The Megger/HDW/SebaKMT OWTS HV150, (150 kV PD Tester for HV Cables) is used to identify, evaluate and locate partial discharge (PD) faults in cable insulation and accessories in all types of high voltage power 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 damped AC test voltage. The HV divider and the coupling capacitor are integrated in a separate unit together with the embedded controller for the digital data acquisition and PD signal processing.

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 150kV switch via a resonance coil. Thus a sinusoidal damping AC voltage with low damping is created (DAC). Depending on the capacitance of the test object the AC frequency varies in the range from tens to hundreds of Hz.

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Features

PD diagnosis by means of damped AC voltage (DAC)
PD level measurement according to IEC 60270
Advanced PD detection and PD site localization
Integrated dielectric losses - measurement
Adjustment features to optimize detection sensitivity
Automatic calibration mode with joint location feature
PC with WIN XP and WLAN for system control
Real-time analysis and reporting using Explorer software
Menu-driven unit to operate the test sequence
Portable design, low weight, easy set-up on-site

Specifications

Max. DAC output voltage	150 kVpeak / 106 kVrms
DAC frequency range	20 Hz … 500 Hz
Capacitance range	0,025 μF … 13 μF
HV charging current	10 mA
Partial discharge measuring range	1 pC … 100 nC
Partial discharge level detection	acc. to IEC 60270
Bandwidth for partial discharge localization	150 kHz … 45 MHz
Dissipation factor tan δ	0,1 % … 10 %

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Megger/HDW/SebaKMT OWTS HV150, 150 kV PD Tester for HV Cables

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