The online Partial Discharge Detector (PDD) from ohv diagnostic is a comprehensive tool for assessing the dielectric condition in rotating machines, GIS, Transformers, Generators, HT Cables, Switchgears. By way of periodical monitoring of the partial discharge behavior within the insulation structure, the operational reliability of the insulation in critical equipment can be assessed. And it helps generate valuable information for maintenance planning and repairs when they are required. Or in many cases PD assessment can help avoid or postpone the inspection and maintenance plans to prioritize the operational availability of the assets. ohv diagnostic’s Partial Discharge Analyzer works based on IEC or UHF signal detection and covers the broad frequency range as per IEC 60270 or IEC TS 62478 and is designed for a very sensitive on-site PD measurement for assessing insulation defects within rotating machines, GIS, Transformers, Generators, HT Cables, and Switchgears.

ohv diagnostic’s PD analyzer can be configured with any standard Coupling capacitor (superimposed or separate PD and Voltage signals) or with UHF decoupling sensor package like UHF sensors for cable sealing end, UHF drain valve & hatch sensors for transformers or window sensors for GIS.

The PDD analyzer offers flexibility of up to 6 multiplexed or synchronized channel measurements to facilitate measurements form multiple sensor inputs at a given location and perform better analysis. Even a combined PDD with IEC- and UHF-signal detectors within one housing is possible. The Hardware is ready for either hard- and software upgrades like Gating, VLF, DC pulse count and PD fault location.

The unit is available with an optional large on-board display and battery backup to facilitate use in outdoor areas where there is no power nearby, and also offers a lower noise floor. Devices with on-board display allow the storage of measurements for viewing them later either on the device itself or transfer to external storage via USB.

Features of the PDD:

•  Provides multiple channels for phase synchronous partial discharge measurements.

•  PD measurements in compliance to IEC 60270 and / or IEC TS 62478.

•  Dynamic auto ranging for consistent measurement response.

•  Easy access via web browser for easy parameterization.

•  User-friendly ohv suite software for high quality measurement and analysis of defect.

•  Covers IEC, broadband and UHF frequency range.

•  High sensitivity, excellent signal to noise ratio

•  weatherproof outdoor housing available, Protection class IP 67