What is the purpose of a surge protective device?

A surge protective device (SPD) is specifically designed to protect electrical equipment from voltage spikes, which can be caused by various factors such as lightning strikes, power surges from utility lines, or even the switching of electrical loads. These voltage spikes can potentially damage sensitive electronic devices, disrupt normal operations, and lead to costly repairs or replacements.

The SPD works by diverting excess voltage away from the equipment, allowing only the normal operating voltage to pass through. This capability is crucial for maintaining the integrity and longevity of electrical appliances and systems that might not be capable of withstanding sudden increases in voltage.

While regulating voltage, improving power factor, and measuring electrical consumption are important functions in electrical systems, they are not the primary purpose of a surge protective device. Its main goal is to provide a safeguard against unexpected and potentially harmful voltage fluctuations, thus ensuring the reliable operation of connected equipment.