Reed Relays and
Electronics India Limited
Manufacturer of Reed Switches, Reed Sensors and Reed-based products
Reed Relays and Electronics India Limited Incorporated in 1971

Transformer Tap-changers Use Reed Switches

Reed switches in transformer tap changer
Transformer

Within transformers, a crucial component known as the tap changer serves to adjust the turn ratios, thereby altering the relationship between the primary and secondary windings. Tap changers play integral roles in protection and control schemes, ensuring optimal performance and safeguarding against potential malfunctions.

One critical function of tap changers involves determining the position of the tap changer assembly, specifically whether it is in an odd or even position. This distinction is essential to prioritize the adjustment of no-load taps before those under load, thereby maintaining operational efficiency and preventing potential disruptions.

To facilitate this functionality, magnets or sets of magnets are strategically mounted on the moving assembly arms. These magnets serve to activate Reed Switches positioned on the transformer. Given that these components are situated within the oil tank of the transformer, specialized Reed Switches capable of withstanding high temperatures are employed. Special construction materials are used to insulate and encapsulate the Reed Switches, ensuring their resilience to the extreme temperatures encountered within the transformer environment.

The selection of appropriate Reed Switches and associated materials is crucial to guaranteeing the reliability and longevity of the tap changer mechanism. By effectively detecting the position of the tap changer assembly, these components contribute to the seamless operation of transformers, enhancing their performance and longevity while ensuring the integrity of power distribution systems.

Application Classification

Applications are classified as Position Sensing, Pulse Counting, Electromagnetic or Relay, Temperature Sensing or Magnet Biasing types. This application is classified as follows and the link gives more information on best practices to help select the most suitable AT band and matching magnet.

Position sensing Type

Position sensing Position Sensing type application When an application requires the end position of a movement sensed, or the sensing of a part when it Continue reading ->

Jun 20, 2024

The Reed Switches and Sensors used in such applications need to be robust, durable and efficient in meeting a high life expectancy. Our engineers work hard in life testing our products under various conditions, and our intention is to ensure end product durability and life. Although we wouldn’t want to restrict any of our products for use in only certain applications, the recommended products for use in this application are listed below.

HW-5052 Reed Switch for High Wattages

Reed Switch for High Wattage switching This HW-5052 High Wattage Reed Switch is physically robust and can switch up to 120W. The two types of contact ratings available cover a Continue reading ->

Dec 3, 2020