What is the rating of transformer used in substation?

For example, a typical substation transformer would be rated 69-13 kV and 20 MVA; meaning the primary or high voltage is 69 kV, the secondary or low voltage is 13 kV and the transformer has a power rating of 20 MVA or 20,000 KVA.

What is the rating of power transformers?

Power transformers available in the market have various ratings ranging from 400kV, 200kV, 66kV, and 33kV. Whereas distribution transformers ratings range from 11kV, 6.6kV, 3.3kV, 440v, and 230 volts. Primarily, power transformers operate on full load rating with minimal load fluctuations.

What is substation rating?

Classification of Substations by Operating Voltage High Voltage Substations (HV Substations) – Involving voltages between 11 KV and 66 KV. Extra High Voltage Substations – Involving voltages between 132 kV and 400 KV. Ultra High Voltage – Operating voltage above 400 KV.

What is the rating of transformer used in 33 11kv substation?

Introduction to Electricity Distribution System 11 KV Primary Distribution system is emanating from 33/11 KV Substations feeding power supply to HT Consumers and 11000/440-220 volts Distribution transformers for supply to LT Three Phase and Single-Phase consumers.

What is the highest transformer rating?

India: BHEL Bhopal has designed and manufactured the highest-rating special type split winding 120 MVA 400/11.5-11.5 kV station transformer, reports The Pioneer. The transformer has been successfully short-circuit tested at the National High Power Test Laboratory (NHPTL) Bina.

How do you calculate the power rating of a transformer?

Use the formula: P(KVA) = (V^2/R)/1000 where R is resistance in ohms. For example, if V is 120 volts and R is 50 ohms, P(KVA) = V^2/R/1000 = (14400/50)/1000 = 288/1000 = 0.288 KVA. Calculate power rating in KVA when you know power in watts and the power factor.

Why is transformer rated in kVA and not kw?

The copper loss depends on the current (ampere) flows through the windings of the transformer while the iron loss depends on the voltage (volts). i.e., the rating of the transformer is in kVA.