Where do you place a transformer?

Where do you place a transformer?

Larger units are often placed on overhead platforms in alleyways, or alongside buildings, or on ground-level pads protected by fencing. Overhead construction is still the most economical choice in rural areas, but it has the disadvantage of susceptibility to ice and wind storms.

Can a dry type transformer explode?

Basically, there are two distinct types of transformers: Liquid insulated and cooled (liquid-filled type) and non liquid insulated, air or air/gas cooled (dry type). (Dry-type transformers can catch fire, too.) It’s even possible for an improperly protected wet-type transformer to explode.

How far can a transformer be from a house?

While it may be tempting to “camouflage” transformers with landscaping, please remember cooperative crews need at least 10-feet of clearance at the opening of a pad-mounted transformer and four-feet at the rear and sides of the housing.

What is installation of transformer?

Provide proper clearance for cable and avoid installing them near blades or coils. Follow minimum wire bending space clearances at terminals for conductors per NEC. If required, follow NEMA standards for transformer sound control depending upon the kVA rating of a unit. Ground, ground and don’t forget to ground.

Where are dry type transformers used?

Dry-type transformers are often used for small and medium-voltage applications, making them ideal for the utility, industrial and commercial industries. They also have copper or aluminum windings that are sealed in varnish.

How hot can a dry type transformer get?

Dry-type transformers are available in three standard temperature rises: 80C, 115C, or 150C. Liquid-filled transformers come in standard rises of 55C and 65C. These values are based on a maximum ambient temperature of 40C.

How to ensure successful operation of a transformer?

When your transformer arrives on site, various procedures should be carried out to assure successful operation (installation, testing and various checkings). The successful operation of a transformer is dependent on proper installation as well as on good design and manufacture.

How much ventilation does a dry type transformer need?

For dry-type transformers, this usually will require approximately 100 cu ft of air per minute per kW of transformer loss. The area of ventilation openings required depends on the height of the vault, location of openings, and maximum loads to be carried by the transformers.

How far away from the wall should a transformer be?

Transformers should be located at least 12 in. to 18 in. away from walls and other obstructions that might prevent free circulation of air through and around each unit, unless the unit is designed for wall mounting and installed per the manufacturer.

How have transformers changed over the years?

While operating principles of transformers remain the same, the challenges of maintaining and testing transformers have evolved along with transformer design and construction. Modern transformers are designed to closer tolerances than transformers in the past.