Question 1 of 10
What is the primary function of a distribution transformer?
Distribution transformers are designed to reduce medium voltage (e.g., 11kV) to low voltage (e.g., 400/230V) for residential, commercial, and industrial applications.
Question 2 of 10
What principle governs the operation of a distribution transformer?
Distribution transformers work based on the principle of electromagnetic induction, as described by Faraday's Law.
Question 3 of 10
What type of connection is typically used on the primary side (high-voltage side) of a distribution transformer?
The primary winding of the distribution transformer is typically connected in a Delta (?) configuration.
Question 4 of 10
What is the typical voltage of the primary winding of a distribution transformer in the example provided?
The primary voltage of the distribution transformer in the given example is 11kV.
Question 5 of 10
What type of connection is typically used on the secondary side (low-voltage side) of a distribution transformer?
The secondary winding of the distribution transformer is typically connected in a Star (Y or Wye) configuration.
Question 6 of 10
What are the typical output voltages from the secondary side of a distribution transformer?
The secondary side typically outputs 400V three-phase and 230V single-phase.
Question 7 of 10
In a 3-phase, 4-wire system on the secondary side, what is the fourth conductor?
In a 3-phase, 4-wire system, the fourth wire is the neutral conductor.
Question 8 of 10
How is the neutral point of the secondary winding connected?
The neutral point is bonded to the neutral terminal at the transformer.
Question 9 of 10
If the primary voltage is 11,000V and the secondary voltage is 400V, what is the approximate turns ratio?
The turns ratio is calculated by dividing the primary voltage by the secondary voltage (11000/400 = 27.5:1).
Question 10 of 10
What color is typically used for the neutral conductor on the secondary side in the IEC color code?
According to the IEC color code, the neutral conductor is typically blue.
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