Three Phases AC SPD may be overloaded in various situations, mainly involving factors such as interference from the external environment, performance limitations of the device itself, improper installation and use, etc. Here are some specific situations that may cause the Three Phases AC SPD to be overloaded:
First, when the power system suffers a lightning strike, the lightning pulse signal will produce huge current and voltage shocks. If the rated voltage and current capabilities of the lightning arrester are insufficient to handle this impact, overload will occur. At this time, the lightning arrester may not be able to effectively suppress the lightning pulse signal, and may even be damaged, causing the device to lose its lightning protection function.
Secondly, the performance of Three Phases AC SPD may decrease due to aging, wear and other reasons during long-term use. In this case, even if the lightning impulse does not reach its rated voltage and current levels, the lightning arrester may be overloaded due to insufficient performance. In addition, harsh usage environments, such as high temperature, high humidity, dust, etc., may also accelerate the aging of lightning arresters and increase the risk of overloading.
Furthermore, the way Three Phases AC SPD is installed and used has a significant impact on its performance. If the installation location is improper, such as being too close to the protected equipment, it may cause the lightning arrester to receive excessive lightning strikes, resulting in overload. At the same time, if the wiring is poor or loose, it may also cause the lightning arrester to fail to work properly, causing overload.
In addition, the selection of Three Phases AC SPD is also a key factor affecting whether it is overloaded. If the selection is improper, for example, the rated voltage and current capacity do not match the actual demand, it may also cause the lightning arrester to be overloaded under normal working conditions.
To sum up, Three Phases AC SPD may be overloaded due to lightning strikes, performance degradation, improper installation and use, and mismatched selection. In order to ensure the normal operation of the lightning arrester and effectively protect the safety of the equipment, it needs to be inspected and maintained regularly to ensure that its performance is in good condition.
