Distribution Transformer Tester

  • Detects primary transformer short-circuit, open circuit & secondary short circuits
  • Visual and audible warning
  • De-energized transformers from 5kVA to 3MVA
  • Measurement by contact on the transformer primary bushing
  • Automatic self-test & Auto shut-off
  • Low battery indicator

The NDB-DOC-3™ is a test instrument designed for distribution networks transformers from 5kVA to 3MVA. It can determine the presence of short circuits or open circuits in the distribution transformer primary winding & also short circuits on the secondary winding. The NDB-DOC-3™ is designed to be operated without disconnecting the transformer’s secondary windings from their loads.

The instrument requires an electrical connection to the primary bushings. The NDB-DOC-3™ displays the diagnostic readings with a visual and audible signal.

Linemen crews are called on to re-energize transformers regularly, whether it’s after storms or when line faults occurs etc… The reasons for the outages are not always obvious, but the power needs to get back on. When damaged or connected to a faulty circuit, the transformers can rupture with massive amount of energy when attempting to re-energize. In order to make a better decision whether it is safe to re-energize the transformer or not the NDB-DOC-3™ is your friendly and safe choice.

Data Sheet
User Manual