Transformers / Technical supply

Off-Circuit Tap Changer (OCTC)

De-energised tap changer for transformers whose voltage is set infrequently.

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Product overview

Built around the project specification

An off-circuit tap changer sets the transformer ratio while the unit is de-energised. Where the supply voltage at a site is stable and taps are adjusted at commissioning or during a planned outage, it does the job an OLTC would do at a fraction of the cost and with almost no maintenance burden.

Key features

Tap selection with the transformer de-energised
Simple, low-maintenance construction
Suits stable supply voltages
Linear and reversing arrangements

Applications

Distribution transformers on stable networks
Industrial supplies with a fixed ratio
Sites where taps are set at commissioning
Cost-sensitive distribution builds

Specifications

Type: Off-circuit (de-energised) tap changer
Principal: Huaming Power Equipment Singapore Pte Ltd
Appointment: Authorised representation for Myanmar

Technical documents

Documentation for procurement and review

Available catalogues, datasheets, manuals, and group certificates are kept in the document library. Final ratings are confirmed against the project specification.

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