NDB-DOC-3 Replacement Test Lead

Test lead for NDB-DOC-3, distribution transformer tester.



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.


• De-energized transformers from 5kVA to 3MVA
• Measurement by contact on the transformer primary bushing
• Detects primary transformer short-circuit, open circuit, & secondary short circuits
• Visual and audible warning

Additional information