WDP II4 Single phase type De-Energized Tap Changer (OCTC)

The immersed off-circuit tap changer is a piece of equipment matched with oil-immersed power transformers. It functions under the transformer’s power-off or no-load state to switch the tap positions of transformer windings, which enables adjustment of the transformer voltage transformation ratio.

Product Detail

Production details

Our company is a specialized manufacturer of general-purpose transformer tap changers, with a strong focus on precision production, rigorous processing, and comprehensive quality control. We implement standardized, traceable workflows across every stage—from raw material incoming inspection, CNC machining, and assembly to final performance testing.

Our dedicated production team follows strict operational protocols to ensure each component meets dimensional accuracy and material stability requirements. Key processes include automated assembly lines, precision welding, and tap changer voltage withstand testing, all verified by our in-house laboratory. Every finished product undergoes full functional testing, including product appearance, contact pressure, contact resistance and mechanical endurance checks, before leaving the factory.

Company qualification

Our company maintains a comprehensive management system to ensure product quality, environmental responsibility, and occupational health safety. We hold ISO 9001 Quality Management System certification, ISO 14001 Environmental Management System certification, and ISO 45001 Occupational Health and Safety Management System certification, reflecting our commitment to standardized operations across production, processing, and testing.

For international markets, our transformer tap changers comply with EU regulations, holding both CE marking and RoHS compliance certification. These credentials confirm that our products meet EU safety, health, and environmental protection requirements, including the restriction of hazardous substances as specified in the RoHS Directive.

With these certifications, we demonstrate consistent adherence to both domestic and international standards, ensuring reliable, safe, and environmentally sound products for customers worldwide.