Nader how does the air switch store energy

How much energy is stored in a small air gap?

The small air-gap might be (say) 1mm long and, have an effective volume of 0.02 milli cubic metres. That's a volume ratio of 100:1 (not surprisingly) but, the core might have a relative permeability that is 1000 times that of air hence, 10 times more energy is stored in the air gap. Nice explanation ! :D

Why do we have more energy in the air gap?

What I know is that the reluctance across the air gap is higher than the reluctance across the core. So if the flux density is constant into the air gap or into the core, we have indeed more energy contained into the air gap because H H is higher.

Does ACB store energy?

Refer to the “ACB does not store energy” part in Item No. 2. There is padlock or key lock in “Disconnected” position. Remove the padlock, open the “Disconnected” position key lock. The ACB itself does not in the right position. Push the ACB and rail into the end. Draw out the racking handle.