Transformers / Technical supply

On-Load Distribution Transformer (OLTC)

Oil-immersed 3-phase distribution transformer with on-load tap changer, 100–4000 kVA.

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Product overview

Built around the project specification

A three-phase, 50 Hz oil-immersed distribution transformer with an on-load tap changer (OLTC) for voltage regulation without interrupting supply. Available in hermetically sealed and conservator constructions, covering 11/6.6/33 kV primaries with a 400/230 V secondary, from 100 kVA to 4000 kVA with documented losses and regulation data.

Key features

On-load tap changer (OLTC)
Live regulation without interruption
Hermetically sealed or conservator type
Rated 100 kVA – 4000 kVA

Applications

Networks needing continuous regulation
11/6.6/33 kV step-down to 400/230 V
Substations with fluctuating load
Facilities needing stable secondary voltage

Specifications

Configuration: On-load tap changer (OLTC)
Ratings: Live regulation without interruption
Construction: Hermetically sealed or conservator type
Technical detail: Rated 100 kVA – 4000 kVA

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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