Example: A single-phase, 100-kVA, 1000:100-V, 60-Hz transformer has the following test results: Open-circuit test (HV side open): 100 V, 6 A, 400 W Short-circuit test (LV side shorted): 50 V, 100 A, 1800 W Draw the equivalent circuit of the transformer referred to the high- voltage side. Label impedances numerically in ohms and in per unit. Determine the voltage regulation at rated secondary current with 0.6 power factor lagging. Assume the primary is supplied with rated voltage Determine the efficiency of the transformer when the secondary current is 75% of its rated value and the power factor at the load is 0.8 lagging with a secondary voltage of 98 V across the load

Q: If the secondary side of a dual-voltage single phase transformer, as per figure 1,  were to be…

A: The secondary side of a dual-voltage single phase transformer, as per the figure given in  the…

Q: A single phase transformer has turns ratio of 4. The resistance and reactance of the primary winding…

A:

Q: A 2400/240 V, 200 kVA, single phase transformer has a core loss of 1.8 kW at rated voltage. Its…

A: A 2400/240 V, 200 kVA Single phase transformer- Core loss Pe=1.8 kW, Equivalent resistance Reqv=1.1%…

Q: 1. A 2.4-kVA, 2400/240-V, 50-Hz, the step-down transformer has the following parameters: : RH =…

A: Rated kVA is  kVA.Induced EMF ratio is  V.The high voltage to low voltage winding turns ratio is…

Q: 3. A 3200/400 single-phase transformer has winding resistance and reactance of 30 and 132…

A: In this question,  We need to determine the equivalent terms in primary side and secondary side.

Q: 3.16 A single-phase, 50-k VA, 2400/240-V, 60-Hz distribution transformer has the following…

A: It is given that:

Q: Rotor resistance of a three-phase induction motor is 0.080 per phase. Maximum torque is available at…

A: We have an equivalent circuit of induction motor with, Maximum torque occurs at 12% slip = 0.12 Slip…

Distribution System

The final stage in the delivery of the electric power is the electric power distribution system. From the transmission system to the individual customers it carries electricity. The distribution system is connected with the transmission system and is used to lower the voltage of the transmission to medium voltage in the range of 2 kV to 35 kV with the help of transformers. This medium voltage to the distribution transformers located near the customer's premises is carried by the primary distribution system lines. These distribution transformers in turn lower the voltage to utilization voltage used in lightings, household appliances, industrial equipments etc. Through secondary distribution lines often several customers are supplied from one transformer. It is through service drops, the commercial and residential customers are connected to the secondary distribution system lines. Customers who demand a larger amount of power can be connected directly to the primary distribution system level or the sub-transmission level.