Single Phase AC SPD

CNKA single phase ac spd Introduction

China Suppliers CNKA offers wholesale single-phase AC SPDs, including I+II, B+C, and T1+T2 types, featuring an Iimp of 12.5kA. These devices are designed to protect against indirect and low-intensity direct lightning strikes. In a standard three-phase TN-C power grid, they meet the requirements of LPL III and IV levels as specified in the EN 62305 standard, safeguarding electrical equipment from lightning current impacts.

The total lightning current ratings are 20kA, with options for 20 or 40kA based on the physical configuration and mutual factors. Additionally, considerations should be made for the locations of lightning rod grounding points, electrical installation grounding points, and SPD installation sites to ensure optimal protection.

CNKA single phase ac spd Parameter (Specification)

CNKA single phase ac spd Feature

1  The design is based on metal oxide varistors.

2  This design features a low response time and Class I and II characteristics.

3  If the service life of the metal oxide varistor is exceeded due to high strength or frequent overvoltage peaks, the modular plug-in design allows for the quick replacement of functional modules.

4  The casing is constructed from PC flame-retardant material, providing both fire prevention and insulation functions.

CNKA single phase ac spd Details

CNKA single phase ac spd Dimensions and wiring

CNKA single phase ac spd Development history

The history of surge protectors dates back to the late 19th century when horn-shaped gaps were first used for overhead transmission lines to protect equipment insulation from lightning strikes and prevent power outages. By the 1920s, various types of surge protectors, including aluminum, oxide film, and shot-type designs, began to be utilized. The 1930s saw the introduction of tubular surge protectors, while silicon carbide lightning arresters emerged in the 1950s.

In the 1970s, metal oxide surge protectors were developed, which not only mitigated overvoltage from lightning in power systems but also addressed overvoltage due to system operations. Since 1992, the 35mm guide rail plug-in SPD lightning protection modules from countries like Germany and France have been introduced to the Chinese market. Following this, integrated box power lightning protection systems from the United States and the United Kingdom have also made their way into China.