Different Types and Configurations of Pole Mounted Transformers

Different Types and Configurations of Pole Mounted Transformers

Different Types and Configurations of Pole Mounted Transformers

Pole mounted transformers come in various styles and configurations, each serving a specific purpose in the electrical distribution system. In this post, we will focus on single phase and three phase polemounts. Additionally, we will explore the differences between conventional pole mounted transformers and Completely Self-Protected (CSP) pole mounted transformers. If you have more questions about the intricacies of pole mounted transformers, check out our other blog post Everything You Need to Know About Pole-Mounted Transformers 

Completely Self-Protected (CSP): CSP transformers are becoming increasingly popular in many applications where reliability and safety are paramount. They are designed with built in protection mechanisms, such as overcurrent, overvoltage, and temperature protection. These integrated safeguards eliminate the need for external protective devices, simplifying installation and operation. By quickly detecting faults, these transformers minimize downtime and reduce maintenance requirements. Which improves the overall reliability of the electrical distribution system. CSP pole mounts are more expensive compared to conventional units though. The reason for this is because of the built in protection devices, like the arrestors you can see in the following picture. 


Conventional: Conventional transformers still have a significant presence and are the most common pole mount design. They are generally more cost-effective compared to CSP transformers since they do not have the built in protections. This makes them suitable for applications where budget constraints are a priority and where additional protective devices can be installed separately. Conventional transformers are commonly found in residential areas, commercial buildings, and less critical infrastructure where the risk of faults is relatively low. Since they do not have the internal arrestors, they are installed where external protective devices are viable. The choice between the two depends on your specific requirements and budgetary considerations.

Single Phase and Three Phase Pole Mount Transformers

Single Phase and Three Phase Pole Mount Transformers: Moving on, let’s discuss the difference between single phase and three phase pole mount transformers. While three phase pole mounted transformers do exist, it is more common to configure three single phase units into a three phase bank, using units of the same specifications. In some cases, using three single phase units may be more expensive, while in others, it may offer cost savings. For additional cost savings consider going for a reconditioned transformer, or maybe even a used transformer. There’s a lot to consider with used transformers, for more information visit our article about the topic: Should I Invest in Used Transformers? 6 Things to Consider. There are a lot of upsides to using three units banked into three phases. It provides redundancy, it does this by using multiple transformers. If one fails, the other two can continue to supply power. Scalability is also a factor when considering banked transformers. If future expansion or changes in load requirements are anticipated using banked transformers makes scalability much easier. Additional single-phase transformers can be added to the bank if needed, without replacing the entire three phase transformer. Your situation will dictate the most suitable option.

Conclusion: Although pole mounted transformers are relatively straightforward, it is crucial to ensure that you obtain the exact specifications required for your project. 

Regardless of your requirements, UTB Transformers is dedicated to offering accurate quotes and supplying transformers fit for your project specifications. Feel free to reach out to us via email at [email protected] or call us at 855-214-0975. We are committed to delivering high quality transformers and providing exceptional customer service to meet your electrical distribution needs.