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AR700

AR700

Defect Location in High-Voltage Equipment Insulation by Acoustic PD

The AR700 measures acoustic signals with multiple relocatable acoustic sensors mounted on the transformer. The software determines the defect location using the time difference of all incoming signals. Finally, these coordinates are shown in a 3D model of the transformer.AR700 device is used for measuring of acoustic signals on the external surfacesof gas-insulated switchgears, power transformers and other grounded tank high-voltage equipment.The acoustic signals are caused by partial discharges in the insulation, which is the site of the defects.The advantage of AR700 device is the quick installation of the relocatable acoustic PD sensors on the grounded external surface of high-voltage equipment. The sensors have magnetic holders thus making it unnessary to de-energize the equipment for the sensors installation.AR700 device has 4 synchronic channels for acoustic signal measurement. This gives the possibility not only to detect defects in the insulation, but also to locate them. The 3D location function of the AR700 device is unique for acoustic devices.
  • The signal analyses and the PD zone location can be carried out both in manual and automatic
  • Software calculates the fault location based on the time difference between the incoming signals and report is generated regarding PD source
  • Convenient and handy – light weight, small size and battery operated
  • Can be used for multiple assets like Transformers, CTs, GIS, Cables, Switchgear Panel
  • Defect type identification by synchronised measurement of PD

TECHNICAL DATA

Full Product Specifications

ParametersAR700
Acoustic channels for PD measuring4
Frequency range of acoustic sensors30 – 300 kHz
High-frequency channels for PD measuring1
Frequency range of high-frequency sensors0.1 – 20 MHz
LCD resolution480x272pixel
computer connectionUSB
Operating temperature range-20 to +60ºC
Humidity<98%, non-condensing.
Operating time from build-in accumulator8 hours
Device weight, without sensors1.1 kg
Dimensions of transportation case520x435x230mm
Device weight in carrying case12kg

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