DC Surge Protectors

[BigBill53]

Hi,
Does anybody know the difference between DC surge protectors and AC surge protectors?


I am designing a standalone piece of equipment that has some solar panels charging a battery bank, and then some equipment being powered off these batteries. I want to know if I should put DC surge protectors on the main bus, or just use (cheaper) AC ones instead?

The whole system is ELV (24V) - I can understand the need for DC surge protectors at a high voltage (say, 1000V) but not for this voltage.

Thanks

 

[krisys]

From the characteristics of the supply, I guess, the AC surges could be high frequency bursts, where as for the DC, assuming it is fed from the AC - DC rectifier, if it is galvanically not isolated, it could be the reflected surge from the AC system. If it is a galvanically isolated system, there is no surge in the DC system.

DC system, if it is isolated, and inside the Faradays cage, no surge arrestor is required, except across the relay coils where high inductive switching is envisaged.