Two primary considerations should be considered when selecting a transformer: the application and the load. It is essential to evaluate many factors before making a choice. This will ensure that both primary concerns are met. In managing electricity infrastructure, all needs must be wise and with quality products. In managing electricity infrastructure, all needs must be wise and with quality products. Then MGM Transformers can help to supply varying secondary voltages to externally connected loads. You can find quality electrical and lighting products at the MGM Transformer Company.
To paraphrase, choosing smaller transformers is usually a no-brainer. An unit with a larger kVA rating can be quickly picked up. You will need to evaluate the unit carefully if it is being used in an electrical utility system. Pacific Crest Transformers is a trusted industry leader with more than 90 years of experience. Here’s a quick checklist that will help you make the right decision.
These are the three main questions that will impact your decision.
Is there enough capacity in the unit to carry the expected load and to handle overload?
Can the unit’s load capacity be increased to accommodate this increase?
What is the expected life expectancy for the unit? What are the installation, operational, maintenance and initial costs?
A number of factors are used to evaluate the transformer’s cost and potential power.
1. Application of the Unit
Based on the application, transformer requirements will change.
A large amount of power is needed for the operation of various processes in the steel industry. Load losses should be minimized, which means that a specific type of transformer construction with minimal copper losses is more suitable. The output power of wind energy applications is subject to large fluctuations. Transformers must be able resist these variations without breaking down. Power transformers must be able to provide constant, correct power for smelting. For the automotive industry, a short-term overload ability is essential. Textile industries will use motors with different voltage specifications. The horticulture industry needs high-performance units that can handle variable loading applications and provide accurate voltage.
These examples illustrate that load type (amplitude, duration and the extent non-linear or linear loads) as well placement are crucial considerations. If the standard parameters are not suitable for your particular application, it will be worth working with a manufacturer to customize the operating characteristics and size of your transformers. Pacific Crest regularly builds custom transformers for unique applications.
2. Insulation Type (Liquid – Filled or Dry)
There are still many questions about the relative benefits of the different types of transformers. However, some performance characteristics have been accepted.
o Liquid-filled Transformers are more efficient, have greater overload capabilities and have a longer life expectancy.
The liquid-filled units can reduce hot-spot coil temperatures better than the dry, but they have a higher risk of flammability.
o Liquid-filled transformers can sometimes need containment troughs to prevent fluid leakage, unlike dry type units.
Dry type units are often used for lower ratings (the switchover point being between 500kVA and 2.5MVA). The location of the unit is also important. Will it be serving an indoor office building or apartment, or an outdoor industrial load? Higher capacity transformers are used outdoors almost always have liquid-filled. However, smaller indoor units can be used for industrial loads. These dry types are usually enclosed in louvers or sealed.