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Modern power systems are threatened by transient voltage surges. These short, high amplitude voltage pulses, usually lasting from nanoseconds to milliseconds, caused by lightning strikes, grid fluctuations or the switching of industrial equipment, can silently destroy precision electronic devices ranging from laptops to photovoltaic inverters. Although circuit breakers are crucial for preventing overloads and short circuits, they are powerless against microsecond-level surges that bypass their mechanical tripping mechanisms. This article will delve into the functions that lightning arresters can perform but circuit breakers cannot, as well as why both are indispensable in electrical protection.

As cities grow rapidly, the use of electrical devices has expanded significantly, but traditional safety measures often fall short of meeting the heightened protection demands. A concern is that, a direct lightning strike on a building or infrastructure can produce a sudden surge of high voltage, damaging electronic parts and circuits, causing equipment to fail, and leading to data loss.

Many people might wonder: If electronic devices came with built-in surge protection, wouldn't they be safer to use? After all, voltage fluctuations can damage devices like computers and TVs, so why don't manufacturers just build protection directly into the equipment?

In power system lightning protection, the lightning arrester's installation location is crucial for transformer protection.

In the mechanical roar of industrial workshops, behind the metal panels of household electrical boxes, between the photovoltaic arrays of solar power stations—there is an inconspicuous device silently safeguarding our safety, that is the disconnector switch. Understanding the working principle of the isolation switch is the key to ensuring the safe and efficient operation of the power system.

In the quest for sustainable green power, solar energy, with its innate cleanliness and renewability, has seamlessly woven itself into the fabric of our daily existence. However, as the old adage goes, nothing is without its drawbacks, and the utilization of solar power is no exception.