Online partial discharge detector for overhead accessories


The ADD™ allows online partial discharge detection on medium voltage accessories such as: Arresters, dry type transformers, bushings, insulators, etc… The partial discharge level is displayed by visual and audible indicators. The remote display module also allows to read the levels from a great distance for maximal safety.




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  • Three levels default indication
  • Two zones (scale of fault)
  • Visual and audible indication
  • All-Check self-test for verifying
  • Proper operation prior to use
  • Built-in universal hotstick adaptor
  • Powered by 9V alkaline battery
  • Carrying case included
  • Low battery indication
  • Lightweight design



Hook type electrode

Hook type electrode for ADD partial discharge detector.

Part number: ACC-035

Hook type probe 60 mm.

Y type electrode

Y type electrode for ADD partial discharge detector.

Part number: ACC-036

Hook type probe 60 mm.

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ndb Technologies

111-1405 ave. St-Jean-Baptiste

Quebec city, Qc

G2E 5K2, Canada

Contact us

1 (418) 877 7787