Transformers / Technical supply

OLTC Diverter Switch Unit

Diverter switch and selector assembly — the switching heart of an on-load tap changer.

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Product overview

Built around the project specification

The diverter switch is the part of an on-load tap changer that actually transfers current between taps, making and breaking under load while transition resistors limit the circulating current. It is the component whose contact wear and oil condition dictate the tap changer's maintenance interval.

Key features

Transfers load current between tap positions
Transition resistors limit circulating current
Oil compartment separate from the main tank
Serviceable contact system

Applications

Replacement and overhaul of existing OLTCs
New power transformer builds
Planned tap changer maintenance
Utility transmission substations

Specifications

Type: Diverter switch and selector assembly
Principal: Huaming Power Equipment Singapore Pte Ltd

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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