SOLUTION

• In electrical engineering, particularly power engineering, voltage regulation is a measure of the change in the voltage magnitude between the sending and receiving end of a component, such as a transmission or distribution line.
• Voltage regulation describes the ability of a system to provide near-constant voltage over a wide range of load conditions.
• A 4% voltage regulation will mean that when loaded, the voltage will fluctuate 4% according to its rated voltage.
• Means if you have a source with 240V on no-load it might drop to 236V when supplying to a load.
• The lesser the number the better the voltage regulation since it stays close to where you want it to be.