Tuesday, 10 January 2017 10:28 Written by 
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The portable multipurpose 3i device (Intellectual Insulation Indicator) is for eff ective high-voltage equipment insulation monitoring on-line. The 3i device measures and analyses partial discharges (PD). For eff ective PD measurement and noise rejection, there are two types of sensors used in the device: the acoustic sensor and the TEV sensor. Both the sensors are built into the device case, and so do not need any connection cables. The device is supplied in a strong metal case; at the faceplate there are the colored screen and two buttons: power button and function button.



      The multipurpose 3i device is for on-line insulation condition estimation in the following equipment:
  • 6 - 35 kV switchgears of various designs;
  • Terminations and joints of cables;
  • High-voltage gas-insulated equipment (Gas-Insulated switchgear (GIS)) of any rated voltage.
  • The tanks of power transformers, breakers, etc.


Parameter 3i
In-built PD sensors acoustic, TEV
In-built acoustic sensor frequency range, kHz 40 ± 2
In-built TEV sensor frequency range, MHz 10 - 100
LCD resolution, pixels 240 x 320
PC connection USB
Battery life, hours 10
Operation temperature range, °C -20 ÷ 40
Device dimensions, mm 187 x 78 x 43
Weight, kg 0.6
Read 8644 times Last modified on Friday, 20 March 2020 06:06
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