What will happen if the voltage is too high? Voltage determines the amount of current that can be drawn in a circuit. Wires can melt if the voltage is high enough. Other devices may stop working or even explode into flames.

High-voltage transformers also have limits. Transformers will fail if they are over-voltage, but if it is only 1 to 10% above the limit, the transformer may still be fine and even heat up more.

It is important to note that it is not safe to use transformers beyond their maximum voltage. Transformers exposed to too much voltage can be destroyed and could explode, posing a danger to those nearby.

Advantages and Disadvantages of High Voltage Transformers:

Here are some advantages and disadvantages of high-voltage distribution transformers to assist you in making a purchase decision.

Benefits of High Voltage Transformers:

High-voltage transformers have many advantages.

  1. Easy To Understand: Transformers are static devices with primary and secondary windings, a magnetic core, a tank, a breather, a radiator, and a Buchholz relay. They transfer power between circuits using electromagnetic induction with the same frequency. However, there can be power loss, voltage drops, and waveform distortion during the process.
  2. Easy to Use: Becker offers after-sale service for high-voltage transformers, ensuring safe and efficient usage. It is crucial not to exceed the transformer’s voltage limit.
  3. Highly Efficient: High voltage transformers are essential in power systems for high voltage applications, allowing economical electricity delivery over long distances. Distribution transformers step down high voltage for use in industrial, commercial, and residential applications.
  4. Versatile: High voltage transformers can be used for various purposes, including voltage level adjustment and electricity distribution between circuits.

Disadvantages of High Voltage Transformers:

Here are some drawbacks of high-voltage transformers to consider before making a decision:

  1. Cooling required: Different cooling media are used for transformers, such as mineral oil or forced air, each with its pros and cons. Regular maintenance is necessary to ensure the transformer’s efficiency and lifespan.
  2. Only works in AC: High voltage power transformers do not pass DC, limiting their use in maintaining DC voltages at the output of amplifier stages.
  3. Old Technology: While high voltage distribution transformers are commonly used, some features may not meet modern grid standards and building codes. A new design is needed to meet modern requirements, and some manufacturers are working on intelligent transformers.
  4. Maintenance: Regular maintenance is crucial to prevent the deterioration or degradation of high-voltage transformers, which can be cumbersome.


High voltage distribution transformers are essential for powering residential, commercial, and industrial buildings. When selecting transformers, consider the advantages and disadvantages mentioned above to make an informed decision.

This post was written by Justin Tidd, Director at Becker SMC! For nearly a half a century, Becker Mining has been at the forefront of industry safety. Becker/SMC is the industry’s leader in increasingly more sophisticated electrical control systems. Most of the major innovations, design features and specialized electrical components have been developed by Becker/SMC.