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J & S Electrical Contractors

A Closer Look at Transformers

Transformers transmit electrical energy from one circuit to another. Since their main purpose is to increase (step up) or decrease (step down) voltage, these electrical devices can be used for a variety of needs ranging from power distribution and measurement to the charging cradle of your cell phone.

Below is an overview of the main types of transformers and their application.

  • Power transformers: Generally used for increasing or decreasing voltage in a power distribution network. Electrical utilities typically use a “step up” transformer to increase voltage and reduce the amount of energy that is lost during transmission over long distances and “step down” to decrease voltage before it reaches consumers.
  • Distribution transformers: Used to step down voltage for distribution to residential and commercial users.
  • Instrument transformers: They reduce high voltage and current to lesser values which can then be measured and safely used by conventional instruments.
  • Single-phase transformers: Often used to supply power for residential lighting, receptacle, air-conditioning and heating needs.
  • Three-phase transformers: Constructed by winding three, single-phase transformers on a single core to achieve cost-effective power distribution.
  • Two-winding and auto transformers: Two-winding and auto transformers are typically used to step up or down voltage from the transmission grid to the distribution grid. When the high and low voltage is greater than 2, it is more cost-effective to use a two-winding transformer. Auto transformers are preferred when the ratio is less than 2.
  • Core and shell transformers: A core type transformer has two vertical legs or limbs with two horizontal sections. HV and LV coils are placed on both limbs. A shell type transformer on the other hand, has a central limb and two outer limbs. Both HV, LV coils are placed on the central limb.
  • Oil cooled transformer: Large transformers used in power distribution or electrical substations that have their core and coils immersed in oil which both cools and insulates them.
  • Dry-type transformers: Air-cooled transformers that provide an economical method of correcting a lower or higher voltage rating for efficient operation of electrical equipment.

As a valued customer of J & S Electrical Contractors, Inc., you will receive tailored solutions to meet the specific needs of your industrial or commercial facility. Our quality workmanship, personalized attention and on-time, within-budget project completions ensure that you are fully satisfied. Discuss your transformer requirements with our team. We will seamlessly co-ordinate every aspect of your project.

Our commercial electricians are fully licensed, certified and up-to-date with technology and safety codes. From transformer installation to maintenance and emergency repairs, you can count on us for cost-efficient electrical solutions and exceptional customer service.

For over 25 years, plant and facility managers in New Jersey, Pennsylvania, Delaware, and across the country rely on us for a full range of electrical, commercial and mechanical contractor services. We will be happy to add you to our long list of happy customers.

Call us at 215-633-8330 to learn more about our electrical services. Or request a quote online for your commercial and industrial projects.