Surge Protective Device (SPD) is a device used to limit transient overvoltage and discharge lightning current. Within the withstand voltage range, or discharge a strong lightning current into the ground to protect the protected equipment or system from impact.

In order to make the surge protector operate safely and reliably in the power distribution system and prevent the occurrence of dangerous accidents. It is stipulated that the SPD must be connected in series with current protectors (such as fuses, circuit breakers). The fuse as a backup protection device has a low surge withstand capability. In order to obtain a higher surge withstand capability, the selected rated current value is relatively large, and it cannot break the low short-circuit current. Therefore, the fuse still has a great potential safety hazard as a backup protection device.

Anhui Jinli independently developed a back-up integrated surge protector with a dedicated overcurrent protection function, which solves the problem of secondary serious accidents caused by the deterioration of the existing surge protection device and the occurrence of power frequency fault freewheeling and exceeding the safe range value. It can quickly realize the fuse protection, prevent the explosion of the arrester, and realize the secondary safety protection of the arrester.

It solves the problem that fuses and circuit breakers have poor resistance to surge and impact, are easily damaged, and cannot break power frequency fault currents. At the same time, two separate devices, SPD and SCB, are combined to form an integrated product, which not only solves the above problems, but also greatly reduces the installation space, reduces the installation process, and reduces the effective voltage protection level. It is more convenient to replace after the failure, and the system can be restored to normal work faster.

Anhui Jinli adheres to the original technology as the basis, constantly develops new products and improves the market awareness of the company's focus on the industry, and makes unremitting efforts to become a well-known lightning protection brand that is respected by the society.