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 the formula of voltage regulation in transformer?
So for example, if a single-phase transformer has an open-circuit no-load terminal voltage of 100 volts and the same terminal voltage drops to 95 volts on the application of a connected load, the transformers voltage regulation would therefore be 0.05 or 5%, ((100 – 95)/100)*100%).
What is voltage regulation formula?
% Voltage Regulation = (1.06 x P x L x PF) / (LDF x RC x DF) Where: P – Total Power in KVA. L – Total Length of Line from Power Sending to Power Receiving in KM. PF – Power Factor in p.u.
What is good voltage regulation of a transformer?
Voltage regulation of an Ideal transformer
In an ideal transformer, there shall be no voltage drop in the secondary winding. Hence the voltage variation at the secondary when the load varies from full loaf to no load is zero. Therefore, for an ideal transformer, the voltage regulation is zero .
What is transformer voltage regulation and efficiency?
VOLTAGE REGULATION AND EFFICIENCY OF TRANSFORMER. ... Regulation up is the ratio of the change in the terminal voltage when a load at a given power factor is removed, and the load voltage .
Why do we need voltage regulation?
The voltage regulator is needed to keep voltages within the prescribed range that can be tolerated by the electrical equipment using that voltage . ... Voltage regulators also are used in electronic equipment in which excessive variations in voltage would be detrimental.
What is voltage regulation in Zener diode?
A voltage regulator is an electronic circuit that provides a stable DC voltage independent of the load current, temperature and AC line voltage variations. A Zener diode of break down voltage VZ is reverse connected to an input voltage source VI across a load resistance RL and a series resistor RS.
Which voltage regulation is best?
- The ideal voltage regulation should be zero.
- Zero voltage regulation indicates that there is no difference between its no-load and its full-load voltage.
- This is not practically possible and is only valid theoretically for ideal devices.
What is permissible voltage?
I.E. Rules regarding – Voltage drop concept: ... The permissible voltage drop in a lighting circuit is 2% of the supply voltage plus one volt . The maximum permissible voltage drop in a power industrial circuit should not be more than 5% of the declared supply voltage.
What is the power factor formula?
Power Triangle and Power Factor Summary
The power factor of an AC circuit is defined as the ratio of the real power (W) consumed by a circuit to the apparent power (VA) consumed by the same circuit. This therefore gives us: Power Factor = Real Power/Apparent Power, or p.f. = W/VA.
At what power factor the voltage regulation of transformer is zero?
Zero voltage regulation of a transformer is achieved at 1 pf leading .
What does negative voltage regulation mean?
Negative voltage regulation means the voltage increases with the load . This is a very undesirable condition because it can lead to an unstable condition. Many loads use more power as the voltage increases. Thus, the voltage goes up, causing the power to go up, potentially causing the voltage to go up some more.
What is meant by voltage regulation?
In electrical engineering, particularly power engineering, voltage regulation is a measure of change in the voltage magnitude between the sending and receiving end of a component , such as a transmission or distribution line.
What are different types of losses in transformer?
The four main types of loss are resistive loss, eddy currents, hysteresis, and flux loss .
What is the condition for 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.
How does power factor affect voltage regulation?
Depending on the power factor of the load, the output full-load voltage may actually be larger than the no-load voltage . ... 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.
