Tap-changers and switches

Tap-changers are used to change the turn ratio between windings in a transformer. This ratio determines the voltage ratio between the windings and is essential for the stabilization of network voltage under variable load conditions. This adjustment may be made by an on-load tap-changer, or by a de-energized tap-changer, or by the selection of bolted link positions.

Hitachi ABB Power Grids offers a comprehensive portfolio of on-load tap-changers both the conventional and vacuum type, for high voltage and low voltage regulation, in in-tank and on-tank solutions. Our offering includes a wide range of de-energized tap-changers.

Why Hitachi ABB Power Grids?

Over 100 years of tap-changer manufacturing experience
Proven solutions with decades of successful field operation
Serving a variety of transformers in different regions and countries
Longest lifetime thanks to high-quality materials
Type-tested beyond international standards
High reliability from few parts and low complexity in design
Easiest maintenance thanks to open design and no need for special tools
Life-cycle support
Retrofit solutions
Easy to upgrade to vacuum technology in existing installation

Our offering

Vacuum on-load tap-changers

Conventional on-load tap-changers

Motor-drive mechanisms

De-energized tap-changers and switches

Bushings

Bushings are critical components in all electrical networks, as their chief role is to bring current at high voltage through a grounded barrier.

Composite insulators

Delivery times for transformer components

Insulation Components

Insulation material based on resin impregnated glass fibers withstanding dielectric, thermal and mechanical stress.

Insulation components and materials

Hitachi ABB Power Grids supplies insulation products and materials for power and distribution transformers offering broad portfolio of insulation products and materials

Interactive tools

Hitachi ABB Power Grids have gathered here some interactive tools that can assist you in your transformer components selection.

Measurement and safety devices

Mechanical components and valves

ABB supplies insulation products and materials for power and distribution transformers offering broad portfolio of insulation products and materials