# What Is The Difference Between Line And Load Regulation?

## What is line and load voltage?

Line voltage is the voltage measured between any two lines in a three-phase circuit.

Phase voltage is the voltage measured across a single component in a three-phase source or load.

Line current is the current through any one line between a three-phase source and load..

## Why do we need voltage regulation?

Voltage regulator, any electrical or electronic device that maintains the voltage of a power source within acceptable limits. The voltage regulator is needed to keep voltages within the prescribed range that can be tolerated by the electrical equipment using that voltage.

## What is meant by line and load regulation?

Line regulation refers to a power supply’s ability to maintain its output voltage given changes in input voltage. … Line regulation involves a power supply’s stability in relation to its input voltage; load regulation is a power supply’s ability to maintain a constant output level given changes in its load.

## What is a quiescent current?

Quiescent Current can be defined as the amount of current used by an IC when in a Quiescent state. The Quiescent state being any period of time when the IC is in either a no load or non-switching condition, however is still enabled.

## What means regulation?

1 : the act of regulating or state of being regulated. 2 : an authoritative rule specifically : a rule or order issued by a government agency and often having the force of law — see also Administrative Procedure Act.

## Why do we calculate voltage regulation?

Voltage regulation is the measure of how well a power transformer can maintain constant secondary voltage given a constant primary voltage and wide variance in load current. The lower the percentage (closer to zero), the more stable the secondary voltage and the better the regulation it will provide.

## What is meant by line regulation?

Line regulation is the ability of a power supply to maintain a constant output voltage despite changes to the input voltage, with the output current drawn from the power supply remaining constant.

## What is meant by load regulation?

Load regulation refers to the ability to maintain a constant voltage output from a power supply despite changes or variability in the input load. Typically, we express load regulation as a percentage of the max load condition, indicating how much output will vary.

## How is regulation calculated?

Voltage Regulation for 11KV, 22KV, 33KV Overhead Line% Voltage Regulation = (1.06 x P x L x PF) / (LDF x RC x DF)RC = (KV x KV x 10) / ( RCosΦ + XSinΦ)Required size of Capacitor (Kvar) = KVA1 (Sin ø1 – [Cos ø1 / Cos ø2] x Sin ø2)L = [1 – (KVARC / 2 KVARL) x (2n – 1)]% Voltage Rise = (KVAR(Cap) x Lx X) / 10 x Vx2.More items…•

## What is line regulation in Zener diode?

Line regulation is the ability of the power supply to maintain its specified output voltage over changes in the input line voltage. It is expressed as percent of change in the output voltage relative to the change in the input line voltage.

## What is load regulation in Zener diode?

The function of a regulator is to provide a constant output voltage to a load connected in parallel with it in spite of the ripples in the supply voltage or the variation in the load current and the zener diode will continue to regulate the voltage until the diodes current falls below the minimum IZ(min) value in the …

## How do you increase line regulation?

As such, the line regulation can be improved by improving the open loop gain, The line regulation for an unregulated power supply is usually very high for a majority of operations, but this can be improved by using a voltage regulator.

## What is line regulation formula?

The line regulation is given by the equation shown below. where |Vrnl | = magnitude of receiving end voltage at no load. |Vrfl| = magnitude of receiving end voltage at no load. The regulation of the line depends on the power factor of the load.

## What is minimum load resistance?

The minimum load is usually the highest resistance that draws the least current from the supply. When the minimum load conditions are not met, the power supply may experience some instability such as flickering and shutdowns. The minimum load for resistive load can be calculated if the minimum current is known.

## When should I use LDO regulator?

A low-dropout or LDO regulator is a DC linear regulator which can regulate the output voltage even when the supply voltage is very close to the output voltage.

## How do you calculate line and load regulation?

How to Calculate Line RegulationFind the difference between the initial voltage and the maximum fluctuation. For example, if the initial voltage was 25 and the maximum measurement was 28, then the difference in voltage would be 3 volts.Divide the change in voltage by the initial voltage. … Multiply the number obtained in Step 2 by 100.

## How is load regulation percentage calculated?

Load regulation (percent) = 100 x (voltage no load — voltage full load) divided by voltage full load. Line regulation is another measure of voltage regulation.

## Which voltage regulation is best?

But, the voltage regulation will vary as power factor varies. Ideally, there should be no change in the transformer’s output voltage from no-load to full-load. In such a case, we say the voltage regulation is 0%. To get the best performance out of your transformer, you need the lowest possible voltage regulation.