Resistance and Reactance of a 20 kVA 800/480V Distribution Transformer:
The resistance and reactance of a distribution transformer play a crucial role in determining its efficiency and performance. Let's break down the resistance and reactance of a 20 kVA 800/480V distribution transformer in detail:

Specifications of the Distribution Transformer:
- Power Rating: 20 kVA
- Primary Voltage: 800V
- Secondary Voltage: 480V

Resistance:
- Resistance is the opposition to the flow of current in a circuit. In a transformer, resistance is primarily due to the resistance of the winding wires and connections.
- The resistance of the transformer can be calculated using the formula R = V^2 / P, where R is the resistance, V is the voltage, and P is the power rating.
- For the given transformer, the resistance can be calculated as R = (800)^2 / 20,000 = 32 ohms.

Reactance:
- Reactance is the opposition to the change in current flow in a circuit. In a transformer, reactance is mainly due to the leakage inductance of the windings.
- The reactance of the transformer can be calculated using the formula X = V^2 / (S * sqrt(3)), where X is the reactance, V is the voltage, S is the power rating, and sqrt(3) is the square root of 3.
- For the given transformer, the reactance can be calculated as X = (800)^2 / (20,000 * sqrt(3)) = 9.24 ohms.
In conclusion, the resistance and reactance of a 20 kVA 800/480V distribution transformer are 32 ohms and 9.24 ohms, respectively. These values are essential for evaluating the transformer's performance and ensuring efficient power distribution.