{"id":2950,"date":"2026-06-16T03:18:34","date_gmt":"2026-06-15T19:18:34","guid":{"rendered":"http:\/\/www.qhtextile.com\/blog\/?p=2950"},"modified":"2026-06-16T03:18:34","modified_gmt":"2026-06-15T19:18:34","slug":"how-does-the-temperature-sensor-work-in-a-dry-type-transformer-4af4-a68a58","status":"publish","type":"post","link":"http:\/\/www.qhtextile.com\/blog\/2026\/06\/16\/how-does-the-temperature-sensor-work-in-a-dry-type-transformer-4af4-a68a58\/","title":{"rendered":"How does the temperature sensor work in a dry type transformer?"},"content":{"rendered":"

Hey there! I’m a supplier of dry type transformers, and I often get asked about how the temperature sensor works in these bad boys. So, I thought I’d take a few minutes to break it down for you in a way that’s easy to understand. Dry Type Transformer<\/a><\/p>\n

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First off, let’s talk about why temperature sensors are so important in dry type transformers. Dry type transformers work by transferring electrical energy from one circuit to another through electromagnetic induction. During this process, a significant amount of heat is generated. If the temperature gets too high, it can damage the insulation of the transformer, leading to a shorter lifespan and potentially dangerous situations. That’s where the temperature sensor comes in. It helps us keep an eye on the temperature and take action if it starts to get out of control.<\/p>\n

There are a few different types of temperature sensors used in dry type transformers, but the most common ones are thermocouples and resistance temperature detectors (RTDs). Let’s take a closer look at how each of these works.<\/p>\n

Thermocouples<\/h3>\n

A thermocouple is a device that consists of two different metals joined together at one end. When there’s a temperature difference between the junction (the joined end) and the other ends of the metals, it creates a small voltage. This voltage is directly proportional to the temperature difference.<\/p>\n

Here’s how it works in a dry type transformer. The thermocouple is placed inside the transformer, usually near the windings where the heat is generated. As the temperature of the windings changes, the temperature at the junction of the thermocouple also changes. This causes a change in the voltage produced by the thermocouple.<\/p>\n

The voltage is then sent to a temperature controller. The controller is programmed to know the relationship between the voltage and the temperature. So, it can convert the voltage into a temperature reading. If the temperature reading goes above a certain set point, the controller can trigger an alarm or take other actions, like reducing the load on the transformer or shutting it down completely.<\/p>\n

One of the advantages of thermocouples is that they’re relatively inexpensive and can measure a wide range of temperatures. They’re also pretty durable and can withstand harsh environments. However, they’re not as accurate as some other types of sensors, especially at lower temperatures.<\/p>\n

Resistance Temperature Detectors (RTDs)<\/h3>\n

RTDs work on the principle that the electrical resistance of a metal changes with temperature. Most RTDs are made of platinum because it has a very predictable and stable relationship between resistance and temperature.<\/p>\n

In a dry type transformer, the RTD is also placed near the windings. As the temperature of the windings increases, the resistance of the platinum in the RTD also increases. A small current is passed through the RTD, and the voltage across it is measured. Using Ohm’s law (V = IR, where V is voltage, I is current, and R is resistance), the controller can calculate the resistance of the RTD.<\/p>\n

Since the relationship between resistance and temperature is known, the controller can then convert the resistance value into a temperature reading. Just like with thermocouples, if the temperature goes above a set point, the controller can take appropriate action.<\/p>\n

RTDs are more accurate than thermocouples, especially in the temperature range commonly found in dry type transformers. They also have better long – term stability. However, they’re more expensive and can be more sensitive to mechanical damage.<\/p>\n

How the Temperature Sensor Fits into the Overall System<\/h3>\n

The temperature sensor is just one part of a larger system in a dry type transformer. It’s connected to a temperature controller, which is usually located in a control panel outside the transformer. The controller not only reads the temperature but also has the ability to control other components in the system.<\/p>\n

For example, if the temperature starts to rise, the controller might activate a cooling fan. These fans are usually installed on the transformer to help dissipate heat. The controller can adjust the speed of the fan based on the temperature reading, so it uses just the right amount of energy to keep the transformer cool.<\/p>\n

In some cases, the controller can also communicate with other parts of the electrical system. For instance, it can send a signal to a circuit breaker to trip if the temperature gets too high. This helps prevent damage to the transformer and other equipment in the system.<\/p>\n

Maintenance and Calibration<\/h3>\n

To ensure that the temperature sensor works correctly, it needs to be properly maintained and calibrated. Maintenance usually involves checking the sensor for any signs of damage, like loose connections or corrosion. If there are any issues, they need to be fixed right away.<\/p>\n

Calibration is also important. Over time, the accuracy of the sensor can drift. Calibration involves comparing the readings of the sensor to a known standard. If there’s a difference, the sensor can be adjusted to bring it back into line. This should be done regularly, according to the manufacturer’s recommendations.<\/p>\n

Why You Should Choose Our Dry Type Transformers<\/h3>\n

As a supplier of dry type transformers, we take pride in the quality of our products. Our transformers are equipped with high – quality temperature sensors that are reliable and accurate. We use the latest technology to ensure that the temperature monitoring system works effectively, protecting your investment and keeping your electrical system running smoothly.<\/p>\n

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Whether you’re using our transformers in a small commercial building or a large industrial facility, you can trust that our temperature sensors will do their job. We also offer excellent customer support, so if you have any questions or need help with maintenance or calibration, our team is here to assist you.<\/p>\n

Oil Immersed Transformer<\/a> If you’re in the market for a dry type transformer, I encourage you to reach out to us. We can provide you with more information about our products, answer any questions you might have, and help you find the right transformer for your needs. Don’t hesitate to contact us for a quote and start a conversation about how we can work together.<\/p>\n

References<\/h3>\n