Transformer protection

Temperature relays protect dry-type transformers from overheating by monitoring the temperature of the winding and core using PTC thermistor sensors or Pt 100 (RTD) sensors. RTD (Resistance Temperature Detector) and PTC (Positive Temperature Coefficient) are two different types of thermistors...

Temperature relays protect dry-type transformers from overheating by monitoring the temperature of the winding and core...

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Products that are marked "On Order" in the "Available Quantity" column are usually not in stock. Such products are available for purchase, however, due to their limited customer base, they usually have higher minimum quantities. DACPOL offers products that are not in stock for the following reasons: DACPOL currently has a large number of electronic components in stock and adds new products every day, however, tens of thousands of additional components and their various variants are available from our suppliers. Even though it is unreasonable to have all these products in stock due to the limited sales, we believe that it is in the best interest of our customers to make them available. Our goal is to inform customers about the maximum number of products available and enable them to make decisions based on specifications, prices, availability, required minimums and our technical advice. Please note that selecting the "In Stock" checkbox may limit the display to only products available for delivery straight from the shelf.

Temperature relays protect dry-type transformers from overheating by monitoring the temperature of the winding and core using PTC thermistor sensors or Pt 100 (RTD) sensors. RTD (Resistance Temperature Detector) and PTC (Positive Temperature Coefficient) are two different types of thermistors used for temperature measurement, which differ in their properties and applications.

RTD:

It utilizes the change in resistance in a metal (e.g., platinum) depending on the temperature.
It exhibits a linear increase in resistance with increasing temperature.
They provide high accuracy and stability in temperature measurement.
They are often used in applications where high measurement accuracy is required, such as laboratories, pharmaceutical, and chemical industries.

PTC:

It uses a polymer thermistor with a positive temperature coefficient of resistance.
The resistance increases sharply with increasing temperature above a certain point known as the switching temperature.
They are used for protection against overheating as self-regulating elements.
Applications include surge protection, heating, and electrical control.