Transformer Parts & Components

OEM-Compatible Components for Oil-Immersed and Dry-Type Transformers
Applications: Distribution Transformers, Power Transformers, Rectifier Transformers

As a transformer manufacturing facility, we also supply professional-grade transformer parts and components to utilities, repair shops, EPC contractors, and plant maintenance teams. All components are manufactured to match OEM specifications and comply with IEC 60076, IEC 60137, IEC 60214, and IEEE C57 series standards.

This page covers three main categories: Transformer Bushings, Tap Changers, and Other Accessories & Materials. Each component is described with its function, application, and key selection criteria from an engineering perspective.
1. Transformer Bushings
Function: Provide electrical connection from the transformer windings to external lines while maintaining insulation across the tank or enclosure.
2. Transformer Tap Changers
Function: Adjust the transformer voltage ratio by changing the number of turns in the HV winding, compensating for input voltage variations.

On-Load Tap Changer (OLTC)
Application: Transformers that cannot be de-energized for voltage adjustment (substations, grid regulation, industrial plants with continuous processes).
Off-Circuit (De-Energized) Tap Changer (DETC)
Application: Transformers that can be taken offline for voltage adjustment (distribution transformers, small industrial units, backup transformers).
3. Other Transformer Accessories & Materials
Conservator Tank (Oil Preservation System).
Function: Accommodates oil volume changes due to temperature variations and minimizes oil contact with air.
Silica Gel Breather/Pressure Relief Device (PRD)/Oil Level Indicator (Magnetic Type)/Winding Materials/Cooling Equipment (Dry-Type Transformers)/Protection and Monitoring Devices/
Engineer’s Checklist
When sourcing transformer components, please confirm the following parameters:

For bushings:

Voltage class (HV and LV sides)

Rated current

Type of mounting (flange or draw-lead)

Pollution class for outdoor (light, medium, heavy)

For tap changers:

On-load or off-circuit required

Number of steps and voltage regulation range (±2.5%, ±5%, etc.)

Control method (manual or motor drive with AVR)

For accessories:

Transformer type (oil-immersed or dry-type)

Conservator or sealed (hermetic) tank design

Ambient temperature range

Required alarm/trip contacts

For materials:

Insulation class (A, B, F, H)

Copper or aluminum winding

Standard or amorphous core

Quality Assurance
All components supplied by our facility are:

Tested to relevant IEC or IEEE standards

Dimensionally compatible with major OEM transformers (ABB, Siemens, GE, Toshiba, Hyundai, and Chinese brands)

Provided with traceable material certificates (where applicable)

Packaged for export with anti-corrosion and moisture protection

Third-party inspection: SGS, TÜV, Bureau Veritas, or Intertek accepted upon request.

How to Request a Quote
To help us quote accurately and quickly, please provide the following information for each component:

Component type (bushing, tap changer, accessory, or material)

Quantity required

Rated voltage and current (for bushings and tap changers)

Mounting dimensions or OEM part number (if replacing)

Target delivery location

For repair shops and maintenance teams: We can cross-reference existing components from physical samples or technical drawings.