Effect Of Overvoltage On High Voltage Power Equipment

A standard figure found in motor books and in the original print version of this article illustrates the general effects of high and low voltage on the performance of t frame.

Effect of overvoltage on high voltage power equipment. The voltage stress caused by over voltage can damage the lines and equipment s connected to the system there are two types of causes of over voltage in. This results in higher operating costs for the equipment and the system. What happens on power consumption in different types of loads or equipment when the nominal voltage supply increases over the permissibly limits of operation. With high speed and accuracy in operation employ modern semiconductor devices in.

Limiters switches for ac networks protection of transformers cables motors etc. Effects of overvoltage on power consumption. It is also known as the voltage surge or voltage transients. High voltage will always tend to reduce power factor thus increasing the losses in the system.

Transient over voltages can be generated at high frequency load switching and lightning medium. An overvoltage protection circuit will operate when the supply voltage increases up to 110 to 130 above the rated voltage of a device. It can cause a reduction in equipment lifetime and increases in energy consumed with no improvement in performance. Over voltage due to external causes 2.

This way it will cut off the power supply to protect the device from overvoltage which may cause to damage the connected device. Over voltages are caused on power systems due to external and internal influencing factors. Low voltage can occur during period of heavy electrical demand such as during heat waves when air conditioners are all running. The electric utility slightly decreases the amount of voltage being fed into the system to compensate for the high demand.

The voltage stress caused by over voltage can damage the lines and equipment s connected to the system there are two types of causes of over voltage in power system. Over voltage due to internal causes. Overvoltage limiters designed to protect high voltage transmission networks. The conditions may be hazardous.

Common power quality problems overvoltage. When the voltage in a circuit or part of it is raised above its upper design limit this is known as overvoltage. Transformers switching equipment and hv cable distribution systems from atmospheric and switching overvoltage effects. Over voltages arising on a system can be generally classified into two main categories as below.

Depending on its duration the overvoltage event can be transient a voltage spike or permanent leading to a power surge. The conditions may be hazardous.