Before diving into the applications and advantages of electricity distribution transformers. Let us familiarize you with the appliance and its attributes. A distribution transformer is an electrical isolation transformer. It converts high-voltage electricity into lower voltage levels. Both homes and small commercial spaces use the lower voltage. The chief goal of a distribution transformer is to reduce the voltage. It renders the primary and secondary sources in isolation by dropping high-voltage. The end-user requires a lower voltage.
Types of distribution transformers
The voltage of the electric power, when sourced from a distribution substation, lies within the window of 4-36kv. That is too high for common users. After the generation from its source. The energy consumed by end-use appliances passes through at least one distribution transformer. Electricity distribution transformers divide into three categories.
- They compare the number of phases operating in the apartment (single-phase – 120 v or three-phase linen- 240 v).
- Type of insulation (dry or liquid-immersed),
- Voltage level (low or medium).
Electricity distribution transformers are of two kinds.
- Ventilated distribution transformer
- Enclosed distribution transformer
Distribution Transformer Rating
The windings of these transformers can either be of copper or aluminum. It is depending on their construction and the purpose they are meant to serve. The standard ratings can range from 50 VA to 750 kVA. Additionally, the distribution transformers are usually placed at a service drop. Where the electrical wires run from the power source directly into the customer’s premises. This recourse resorted when the peripheral settlements including pumping stations, farmyards, and isolated houses need to be supplied with power that is below 30KV. Other than this, distribution transformers are also utilized when the power supply has to be facilitated through overhead wires for railways functioning on AC.
Smaller and Bigger Transformers
Needless to say, the smaller transformers wouldn’t dissipate as much heat as their larger counterparts. So, they are mostly fortified with dry-tape. Because dry-tapes are less likely to catch fire. The small distribution transformers are installed within confined spaces that are more vulnerable to starting a fire.
Number of distribution transformers
As far as the number of distribution transformers required in a particular area is concerned. The units would vary according to the number of customers falling back on them for the supply of electricity. For instance, in rural areas, each customer might need allotting with one distribution transformer. While in the prime cities, several homes can rely on a single transformer. In contrast to this setting, commercial buildings must rely on many distribution transformers to be on the safer side of the spectrum.
Primary Distribution Consumer
Buildings that electric service delivered at primary distribution voltage have individual distribution transformers. They fit their transformer in the basements to follow the needs of voltage cutback. The urban settlements have primary electricity distribution lines running underground. These areas bank on a pad-mount transformer. These transformers are lock inside a metal cabinet and positioned on concrete pads.