What is the direction of arc pressure for a NSX breaker (NSX250, NSX400, NSX630)

Issue:

What is the direction of arc pressure for a NSX breaker (NSX250, NSX400, NSX630)

Product Line:

ComPacT NSX new generation

Environment:

NSX 100/250, NSX400/630

Resolution:

In case of NSX400/630, we can easily notice the filters of the arc chute in both top and bottom. Please see the images attached.

NSX400-630 Top View NSX400-630 Bottom View



In NSX100/250, the arc chutes are present inside the breaking cell, and the gases exhaust are propelled outside the cell by openings in the cell.

So the arc pressure for NSX100/250, NSX400/630 are almost towards the top and bottom where there is arc chute.