Surge protective decives, also known as lightning arresters, are electronic device that provide safety protection for various electronic equipment, instrumentation, and communication lines. When a surge current or voltage is suddenly generated in an electrical circuit or communication lines due to external interference, thesurge protective decives can conduct the shunt in a very short period of time, thereby avoiding the damage of the surge to other equipment in the circuit. The surge protective decives are suitable for the requirements of surge protection in domestic residential, tertiary industry and industrial fields. The followings are the features of surge protective decives.
1. The protection flow of the surge protective decives is large, the residual pressure is extremely low, and the response time is fast.
2. The surge protective decives adopt the latest arc extinguishing technology to completely avoid fire.
3. The surge protective decives adopt temperature control protection circuit and built-in thermal protection.
4. The surge protective deciveshave power status indicators to indicate the working state of the surge protectors.
5. The surge protective decives have rigorous structure and stable and reliable performance.
Impulse current Iimp 1. Where there are no national regulations or specific regulations for the type of building to be protected: the impulse current Iimp shall be at least 12.5 kA (10/350 µs wave) per branch in accordance with IEC 60364-5-534. 2. Where regulations exist: standard IEC 62305-2 defines 4 levels: I, II, III and […]
In an electrical systems, SPDs are usually installed in tap-off configuration (in parallel) between the live conductors and the earth. The operating principle of SPD can be similar to that of a circuit breaker. In normal use (no overvoltage): the SPD is similar to an open circuit breaker. When there is an overvoltage: the SPD […]
In modern power systems, the use of direct current (DC) power supplies is becoming increasingly popular, especially in areas such as renewable energy and electric vehicles. With the widespread use of DC power supplies, the risk of overvoltage faced by electrical equipment has also increased. Therefore, DC surge protective devices (SPDs) have become an important tool for […]
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