KDDAC-30 Partial discharge tester

Description

Partial discharge tester

Introduction
KDDAC-30 cable oscillating wave local amplifier test system is a new technical tool for cable field inspection and condition diagnosis. It has the characteristics of simple and practical, small size, easy to transport, non-destructive test under AC voltage conditions, and diversified means of insulation performance testing and evaluation. The combination of Damped ACVoltage (DAC) withstand voltage test and DAC inspection provides an effective means to find potential defects in cable line insulation. In addition, with the help of the dielectric loss field measurement technology, the state assessment of the insulation aging degree of high voltage cable can be further realized.

KDDAC-30 cable oscillating wave local amplifier test system can generate a local amplifier AC voltage of up to 30kV during the test process, and combine the system hardware and system software to diagnose, mainly including:
 Semiconductor technology;
 Laser control technology;
 Digital signal processor and filtering technology;
 Wireless network control technology.

Partial discharge tester
System hardware
KDDAC-30 is mainly composed of two parts: a measurement and control host and an integrated local amplifier oscillating wave unit. The local amplifier oscillating wave unit is an integrated design, which includes a high voltage coil, a high voltage divider, a high voltage switch, a local amplifier coupling capacitor, a coupling unit and a local amplifier detector.

The measurement and control host coordinates the operation of the whole system, communicates with the local amplifier oscillation wave unit through the wireless network, controls the operation of the local amplifier oscillation wave unit, and collects, stores and analyzes the local amplifier oscillation wave signal and the local amplifier signal collected by the voltage divider/coupler.

System software
Chinese operation interface, able to record oscillation voltage waveform and local amplifier signal waveform; Automatic display oscillation voltage waveform frequency, amplitude and sampling time width; It can analyze the waveform of local amplifier signal. Automatic display of dielectric loss test values; Automatic generation of localization map and statistical report; Automatic generation of PD statistical maps.
Main functions of KDDAC-30 system software:
Software information record interface:
1 Record the date and time
Basic information of registered users: experimenter
Basic INFORMATION OF test cable: including test cable station name, cable type, length, joint, operation history, etc

Partial discharge tester
Main functions of the software:
1 Chinese operation interface
Conveniently and intuitively set voltage amplitude, control automatic voltage boost and oscillation wave generation
3 Automatic display of oscillation wave voltage amplitude, oscillation frequency and sampling time width
4 Automatically display the dielectric loss value
5 Automatic display of maximum volume
6 Store the oscillation waveform and local amplifier waveform
The local amplifier waveform can be amplified on site to locate the local amplifier source
Automatic or manual analysis of detection data
Automatic generation of localized positioning map, automatic generation of statistical reports
9 Automatic generation of local amp statistical maps, such as Q-φ maps, N-φ maps, etc