Maximum Amperes (AF/AT)

[Guinevere]

Dear All,
is there anyone knows, that in this attached catalog,
The "maximum amperes" refer to Frame rating or Trip rating?

Thank you very much

Regards,

 

[ScottyUK]

Looks like frame rating to me.


----------------------------------

If we learn from our mistakes I'm getting a great education!

 

[rbulsara]

It's both. However the frame size (physical dimensions, AIC rating etc) is fixed for a given model/frame type. You can get the rating plugs or adjustable trip units equal or below the maximum ampere rating.

So you can get maximum of 250AF/250AT in a KH model, or you can also get a 250AF/150AT. Both units will physically be the same, except for the trip rating.

A side note: Usually the lowest trip rating you can get is 0.5X the frame rating. There are some expceptions.