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## What is the power factor angle of load for maximum voltage regulation?

d**(VR) / dƟ _{2} = 0** assuming load current constant. Here tanƟ

_{2}is positive, which means that maximum Voltage Regulation occurs for lagging power factor load and at a power factor of r

_{e2}/ x

_{e2}. Thus we can say that, maximum Voltage Regulation occurs when load power factor is equal to leakage impedance angle.

The voltage regulation of the transformer is the percentage change in the output voltage from no-load to full-load. And since power factor is a **determining factor in the secondary voltage**, power factor influences voltage regulation. This means the voltage regulation of a transformer is a dynamic, load-dependent number.

## What is maximum voltage regulation?

The regulation is maximum **when the load power factor angle is equal to the impedance angle of the transformer**. i.e., Equation (1.58) shows the power factor of the load at which voltage regulation is maximum.

## What is the power factor of industrial load?

Generally, a power factor of **0.8 or above** is considered a good power factor. Lower than 0.8 and it should be corrected to save on consumption and comply with the requirements of the electricity network operator.

## When the load PF is loading then voltage regulation is?

(iii) When the load p.f. is leading to this extent that IX_{L} sin φ_{R} > I_{R} cos φ_{R}, then voltage regulation is **negative** i.e. the receiving end voltage V_{R} is more than the sending end voltage V_{S}. (iv) For a given V_{R} and I, the voltage regulation of the line decreases with the decrease in p.f. for leading loads. 2.

## How does load power factor affect the voltage regulation and transmission line efficiency?

Effect of Load Power Factor on Efficiency

three phase. Or **I = P ÷ 3V _{R}cos φ_{R}**. Thus, for a constant amount of power and voltage at the receiving end, the line current is proportional to the load power factor. … Thus, the efficiency of the transmission line decreases with the decrease in load power factor.

## How do you calculate full load voltage regulation?

Load regulation (percent) = **100 x (voltage no load — voltage full load) divided by voltage full load**.

## Why no load voltage is greater than full load voltage?

Because of winding voltage drop as current starts flowing…. … If there is no load condition, **no current flows and there is no voltage drop in the series resistance**, hence voltage across load is more than full load condition.

## When the load power factor is leading voltage regulation of line is Mcq?

Explanation: Since voltage regulation of a transformer in the leading loading condition is not additive in nature, at particular power factor in leading we can get **zero voltage regulation**.