Backup circuit breaker (fuse) of SPD

Application range

      At present, the industry is equipped with small moulded case circuit breakers or fuses at the front end of the lightning protection device. During the lightning stroke, the whole system has a large residual voltage due to the special structure of the circuit breaker, so it is easy to damage the rear end devices. In addition, lightning strike can easily cause the circuit breaker to trip, so that the whole system will lose the protective effect of lightning protection. At the same time, the rated power frequency current of molded case circuit breaker and fuse is very large, and the outlet current is much higher than the rated current, which brings catastrophic hidden danger to the whole system, such as the continuous cut of power frequency and the continuous fire and so on. Once the mouth is removed, the whole rear end device will lose the protection against lightning stroke. This is a dangerous state. If the continuous lightning strikes or the replacement is not in time, the back-end device will be damaged.

Product features

1. the maximum discharge current Imax 160kA or the maximum non - exit impact current limp 50kA;

2. the design of low pressure sense makes the residual pressure of the whole protection loop very low;

3. the power frequency removal current is less than 3A, and the opening time is 0.1s/3A;

4. particularly appropriate application channel design to ensure that the circuit breaker still has the corresponding capability of lightning protection after the opening of the circuit breaker.

5. modular design upgrading and installation, easy to install, maintenance free;

6. Remote switching operation (selection);

7. remote warning function, the first time after the opening of the signal, prompting the closing operation or replacement (selection).

Technical data

Wiring diagram