A distribution transformer or service transformer is a transformer that provides a final voltage transformation in the electric power distribution system, stepping down the voltage used in the distribution lines to the level used by the customer.[1]
The invention of a practical efficient transformer made AC power distribution feasible; a system using distribution transformers was demonstrated as early as 1882.
If mounted on a utility pole, they are called pole-mount transformers. If the distribution lines are located at ground level or underground, distribution transformers are mounted on concrete pads and locked in steel cases, thus known as distribution tap pad-mount transformers.
Distribution transformers normally have ratings less than 200 kVA,[2] although some national standards can allow for units up to 5000 kVA to be described as distribution transformers. Since distribution transformers are energized for 24 hours a day (even when they don't carry any load), reducing iron losses has an important role in their design. As they usually don't operate at full load, they are designed to have maximum efficiency at lower loads. To have a better efficiency, voltage regulation in these transformers should be kept to a minimum. Hence they are designed to have small leakage reactance.[3]
^Harlow 2012, p. 3-4.
^Bakshi 2009, p. 1-24.
^Bakshi 2009, p. 1-25.
and 21 Related for: Distribution transformer information
A distributiontransformer or service transformer is a transformer that provides a final voltage transformation in the electric power distribution system...
the first constant-potential transformer in 1885, transformers have become essential for the transmission, distribution, and utilization of alternating...
from one transformer through secondary distribution lines. Commercial and residential customers are connected to the secondary distribution lines through...
amorphous metal transformer (AMT) is a type of energy efficient transformer found on electric grids. The magnetic core of this transformer is made with a...
A DistributionTransformer Monitor (DTM) is a specialized hardware device that collects and measures information relative to electricity passing into and...
A substation may include transformers to change voltage levels between high transmission voltages and lower distribution voltages, or at the interconnection...
A variety of types of electrical transformer are made for different purposes. Despite their design differences, the various types employ the same basic...
electric power distribution. A current transformer has a primary winding, a core, and a secondary winding, although some transformers use an air core...
circuit breaker and switch that feed a distributiontransformer. The metal enclosed unit connects to the transformer either through a bus throat of standardized...
and taps to protect distributiontransformers from current surges and overloads. An overcurrent caused by a fault in the transformer or customer circuit...
typical power distribution grid, electric transformer power loss typically contributes to about 40-50% of the total transmission and distribution loss. Energy...
A zigzag transformer winding is a special-purpose transformer winding with a zigzag or "interconnected star" connection, such that each output is the vector...
A vision transformer (ViT) is a transformer designed for computer vision. A ViT breaks down an input image into a series of patches (rather than breaking...
comprising 33 kV, 22 kV & 11 kV transmission lines, Sub-stations and DistributionTransformers spread over 3.08 lakh km2 geographical area of Maharashtra covering...
is double grounded at each distributiontransformer. Neutral and earth conductors run separately on overhead distribution lines. Separate conductors for...
Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. It is used in oil-filled...
In electrical engineering, an autotransformer is an electrical transformer with only one winding. The "auto" (Greek for "self") prefix refers to the single...
range, from larger distributiontransformers to large power transformers, rectifier and drive-duty transformers, and special transformers for a wide array...
system stabilizers, 705 power transformers, 139 33 kV feeders, 825 11 kV feeders and around 29,668 distributiontransformers of various capacities. SBPDCL...
other coil (called the secondary winding). A few types: Distributiontransformer - A transformer in an electric power grid which transforms the high voltage...
pole-mounted single phase distributiontransformer usually provides power for one or two residences. The secondary winding of the transformer provides 240 volts...