Non-Excitation Tap Changer

De-Energized Tap Changer (No-Load Tap Changer) Manufacturer & Supplier

De-Energized Tap Changers (DETC), also known as No-Load Tap Changers, are essential components of power and distribution transformers. Unlike on-load tap changers (OLTC), DETCs are operated without load, allowing transformers to safely adjust voltage levels when de-energized.

Our range of DETCs for transformers provides high reliability, long service life, and a variety of structural options, suitable for distribution transformers, power transformers, and special transformer applications.

DETC Product Range

1. WDG / WDG + WLG / WSG Series – Cylindrical & Drum-Type DETC

Description
Cylindrical and drum-type De-Energized Tap Changers are designed for reliable voltage regulation under no-load conditions. These series offer proven performance for a wide range of transformer capacities.

Key Features

• Compact cylindrical or drum structure

• Smooth, reliable switching

• Long mechanical durability

• Suitable for standard transformers

Applications

• Distribution transformers

• Medium-voltage power transformers

2. WSL Series – Cage-Type DETC

Description
The Cage-Type DETC offers high reliability and mechanical robustness. Its cage design ensures even distribution of switching forces and long-term stability.

Key Features

• Cage structure for enhanced mechanical strength

• Smooth operation with minimal wear

• Compatible with multiple transformer types

Applications

• Power transformers

• Industrial and utility substations

3. WDT / WST Series – Strip-Type DETC

Description
The Strip-Type DETC is compact and versatile, using strip contacts for precise no-load switching. Ideal for transformers requiring frequent tap adjustments without energizing the load.

Key Features

• Strip contact design

• Low mechanical resistance

• Easy installation and maintenance

Applications

• Distribution transformers

• Industrial transformers with controlled voltage requirements

4. WDP / WSP Series – Disc-Type DETC

Description
The Disc-Type DETC provides reliable no-load switching with disc contacts, ensuring long-term electrical and mechanical durability.

Key Features

• Disc contact mechanism for stable operation

• High precision in tap selection

• Extended mechanical life

Applications

• Power transformers

• Special transformer projects

5. WSLD Series – Cage-Type Motorized DETC

Description
The Motorized Cage-Type DETC combines the reliability of a cage structure with motorized drive, enabling automated no-load voltage adjustments.

Key Features

• Motorized operation for remote control

• Cage structure for mechanical strength

• Ideal for transformers requiring automated tap changes

Applications

• Industrial and distribution transformers

• Remote or automated substations

Typical Technical Parameters

Parameters can be customized according to transformer design and project requirements.