電湧保護器的選擇

電湧保護器的選擇

的選擇 電湧保護器 如下進行。

Step 1: Select Uc, UT, In, Imax of 電湧保護器. The maximum continuous operating voltage of the 電湧保護器 is much larger than that of the power system, and the transient overvoltage of the 電湧保護器 is much larger than that of the grid.

Step 2: Determine the protection distance, that is, determine the location of the 電湧保護器.

Step 3: Anticipate the life and failure modes of the 電湧保護器.

Step 4: Interrelationship between 電湧保護器 and other electrical appliances. Under normal circumstances, Ic will not cause any personal safety hazards and damage other equipment; when a fault occurs, 電湧保護器 will not affect other electrical appliances, such as RCD or circuit breaker. The surge coordination between the 電湧保護器 and the overcurrent protector, when it is less than Imax, the overcurrent protector does not operate; when it is greater than or equal to Imax, the overcurrent protector is allowed to operate, but it cannot cause any damage.

Step 5: 的選擇 voltage protection level Uₚ 應考慮被保護設備的突波耐受能力Uw。

Step 6: When two 電湧保護器s are used on the same conductor, the cooperation between the selected 電湧保護器 and other 電湧保護器s should be considered.

指某東西的用途 電湧保護器 is different in different grounding methods. On the one hand, because of the different characteristics of the protection under different grounding methods, the installation location is also different; on the other hand, the 電湧保護器 cooperates with the leakage protection device, in order to avoid the current when the 電湧保護器 operates may cause the leakage protection of the upper level at the same time The device malfunctions, so the 電湧保護器 needs to be installed with corresponding protection devices, such as circuit breakers or fuses, on its upper level during installation.