CageType De-Energized Tap Changer (OCTC)

1. Company introduction

   Liaoning Jinli Electric Power Electrical Appliance Co., Ltd was established in 2001 with a registered capital of 5 million yuan. It is a national high-tech enterprise specializing in the research and development, production, and sales of various types of transformers Tap Changers in China. It is also a national intellectual property advantage enterprise and has a provincial-level enterprise technology center.

   The products are mainly sold in more than 20 countries and regions such as South Korea, Russia, Switzerland, Australia, Thailand, India, Peru, etc.

   The main export products are No-excitation linear tap changers, Disc type tap changers, and Plate type tap changers, as well as 10~35KV On load tap changer.

2. Product introduction

In the complex electrical system of an American-style pad-mounted transformer , the de-energized drum-type tap changer (commonly known as the "American transformer drum switch") plays a crucial role. As a no-load voltage regulation device specifically designed for oil-immersed environments, it is installed directly inside the transformer tank, serving as a core component for achieving precise grid voltage regulation and ensuring power quality.

3. Product parameters

4.Product feature and application

• Distribution Transformers and Rural Power Grids: This is the most typical application area for de-energized voltage regulation. In rural distribution networks or urban fringe systems, where load fluctuations are relatively smooth, de-energized tap changers are commonly used. The tap range is usually within ±5% of the rated voltage, which is sufficient to meet daily power consumption needs.
• Industrial Dedicated Transformers: In scenarios such as small electric arc furnaces and industrial rectifier transformers, because grid load fluctuations follow certain patterns or the voltage regulation accuracy requirement does not exceed ±5%, de-energized drum-type tap changers are widely adopted due to their simple structure and low cost.
• Step-up and Step-down Power Transformers: This includes generator-transformer units and three-winding power transformers. When the voltage at the end of the transmission line is relatively stable, or when the load on the medium-voltage winding fluctuates significantly, de-energized voltage regulation is mostly employed.