What is the role of distribution transformer?

Distribution transformer is a very important equipment that allows the delivery of electricity with a high degree of capillarity. As a consequence, all of the conductors of a distribution network become a way for bringing into a transformer voltage surges, especially those yielded by lightning.

Which transformer is used in distribution?

Three Phase This kind of transformer is used to hold electrical energy from the main distribution circuit to a minor distribution circuit. This type of transformer transmits the current to a secondary distribution circuit and also reduces the voltage of the primary distribution circuit.

Why are distribution transformers used in large buildings?

Power Distribution in Large Buildings Large buildings have a much higher electrical load than small buildings; therefore, the electrical equipment must be larger and more robust. Large building owners will also purchase electricity at high voltages (in the US, 13.8kV) because it comes at a cheaper rate.

How are distribution transformers connected?

Distribution transformers are connected in delta-star. This arrangement requires 3 conductors in the high voltage side and 4 in the low voltage side, as well as it provides the star point conductor as a neutral point. This can serve single phase as well as three phase loads.

How do you identify a power transformer and a distribution transformer?

Whereas power transformer is designed for maximum efficiency at 100\% load as it always runs at 100\% load being near to generating station. Distribution Transformer is used at the distribution level where voltages tend to be lower . The secondary voltage is almost always the voltage delivered to the end consumer.

How many houses can one transformer?

That single transformer feeds 7 houses (was 4 way back when, but 3 decent sized ones have been added in the neighborhood in the last 10 years).