Description
Natural Drainage Units
Natural Drainage Units a South African development used to return current leaving a DC traction system and finding its way onto a buried pipeline, causing the pipeline to corrode if not implemented.
NDU’s are utilized to direct current to a structure from a pipeline when the pipeline is more positive than the relevant structure.
This type of Cathodic Protection is only used where the current requirements are small.
NDU’s Features:
- DC drain up to 600 Amps steady state
- 4000V blocking voltage in reverse direction
- Class 1 surge protection
Specifications:
- Unit, 4000V, drain up to 600A
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