Hitachi Engineering & Services Co.,Ltd. :Partial Discharge Diagnosis Services

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	Partial Discharge Diagnosis Services
	Measurement & Diagnosis

Reliable partial discharge monitoring service for GIS
No need to open or de-energize the equipment
Effective to find out abnormal conditions at an early stage

Features

	1) High diagnostic reliability because of less external interferences such as vibrations and noises thanks to the UHF method and also masking of external noise zones from the beginning.
	2) Real time diagnosis utilizing the Neural Network Theory.
	3) Simple PD Location
	4) Risk-assessment in 5 grades useful for the next step inspection plan

Application Area

	1) PDM of existing GIS
	2) Inspection of insulation conditions of new GIS at factory and after site installation.

Main Specification

	1) System components : sensors, measurement unit, and PC ( including diagnosis software)
	2) Dimensions : 360 (mm) x 450 (mm) 154 (mm) ( except sensor)
	3) Weight : Approx.12 kg( except sensor)
	4) Min. PD magnitude to be detected : Approx. 5pC ( in case of internal sensors)

Portable Type PDM Device

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