How to choose the right surge protection device?(3)

Industry News

Home > Industry News

How to choose the right surge protection device?(3)


How to choose the right surge protection device?(3)

And the sizing of surge protection devices?

Then, the sizing of Type 2 surge protection devices depends mainly on the exposure zone (moderate, medium, high): there are different discharge capacities for each of these categories (Imax = 20, 40, 65 kA (8/20)).

For Type 1 surge protection devices, the min requirement is a discharge capacity of Iimp = 12.5 kA (10/350). Higher values may be required by the risk assessment when the latter is requested.

How to choose the protection devices associated with the surge protection devices?

Finally, the protection device associated with the surge protection device (circuit breaker or fuse) will be chosen according to the short-circuit current at the place of installation. In other words, for a residential electrical switchboard, a protection device with an Isc < 6 kA will be chosen.

For office applications, the Isc is generally < 20 kA.
Manufacturers must provide the table for coordination between the surge protection device and the associated protection device. More and more surge protection devices already incorporate this protection device in the same enclosure.

Ms.Derain +86 18710308274
Ms. Elise +8618797408662
google-site-verification: googled0561bc69b0d47a1.html