In contemporary society, where electricity serves as a linchpin for both production and daily life, the consistent and stable supply of electrical power assumes paramount importance. Regrettably, power systems are susceptible to disturbances in the form of voltage surges, which have the potential to inflict significant damage upon electrical equipment. In response to this challenge, … Read more
The Role of Surge ProtectorsSurge protectors, in reality, are a type of voltage-limiting device, typically utilizing varistors with high-pass, low-resistance characteristics. When the electrical grid operates under conditions not exceeding the maximum continuous operating voltage (Up), the gap between the two electrodes in the surge protector remains in a high-resistance state. However, if the electrical grid … Read more
Conventional circuit breakersand fuses are unable to fully meet the requirements of SPD protection devices for the following reasons:When SPD degrades and malfunctions, it may enter a short-circuit failure state. Miniature circuit breakershave insufficient breaking capacity, and molded-case circuit breakers and fuses may not respond promptly.Without robust protective devices, it may lead to fires or explosions, resulting … Read more
Surge protective devices (SPDs) are often backed by fuses and small circuit breakers or molded-case circuit breakers. When these elements are coordinated with SPDs, they should remain unaffected during rated surge current conditions, ensuring the normal dissipation of surge current while maintaining a residual voltage (Ur) on branch circuits below the protection level of the electrical equipment (Up). … Read more
Photovoltaic power plants, closely connected to the lives and production of people, are raising high concerns across the industry regarding how to ensure the “safety” of photovoltaic power stations, especially in the case of retrofit distributed photovoltaic systems installed on building rooftops. Countries worldwide have made related regulations concerning the DC-side voltage, DC arc protection, … Read more