6.6 kV Oil-Immersed Distribution Transformer

Overview: A 6.6 kV oil-immersed distribution transformer is a possible interface between an industrial medium-voltage feeder and the site's lower-voltage loads. The incoming nominal voltage does not establish the insulation level, winding arrangement or delivered capacity.

Where this configuration is considered

Industrial plants with 6.6 kV switchboards may use this class for local distribution, auxiliary services or a step-down point near a load centre. The final location and protection scheme are set by the facility design.

Information to define before quotation

Confirm the feeder voltage range, secondary voltage, kVA, phase arrangement, frequency and load cycle. Include short-circuit data, tap range, losses, cooling, oil containment and any site-specific testing requirements.

International standards to review

Reference standards may include IEC 60076-1:2011. The applicable editions, clauses, conformity evidence and test scope must be agreed for the final design and destination market. This page does not claim certification or guaranteed compliance for an unspecified product.

A useful question for the technical brief

Is the 6.6 kV feeder dedicated to this load, or does it share a bus with large motors?

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