[TenTec] Airpax,

[Dr. Gerald N. Johnson]

On Fri, 2007-03-30 at 10:30 -0500, K5XS at aol.com wrote:
>  Jim,
> What exactly is the Airpax product you are using?
> Thanks.
> Bernie

Two critical parts that the Airpax fits. Near instantaneous magnetic
trip, no thermal delay, and 20 amp rating. Most electronic vendor
circuit breakers are thermal. Too slow by Tentec specs.

There are several Airpax products that fit the fast trip specification.

>From prior circuit break discussion on this forum:

> In the data sheet for the TEN-TEC Model 1140 Magnetic Circuit Breaker
> is the 
> following:
> (the 1140) "is a special fast-acting magnetic circuit breaker which
> trips 
> between 10 and 20 milliseconds, typically.
> 
> In the section of same data sheet, under "Specifications" appear:
> Model: 1140         Operating Rating: 18 amps        Trip Rating: 24.9
> amps
> 
> 
Others have said the Airpax part number that is the 1140 is:

>         We need an Air Pax T11-1-20.0A-01-11C-V
> 
Others wrote in great detail:

> Hi Bill,
>    What you need is the   T11-1-20.0A-01-11C-V
> This is the 20A fast trip. It won't trip until the current gets
> to about 27A. Don't use anything more and anything less will
> likely trip much too soon. If you could get an instant trip I
> think that would be the best, that would be a T11-0-20.0A
> -xx-xx-xx however these are only made on special order and PoCo
> sales will not purchase them. BTW you can get the airpax breakers
> from PoCo Sales, 8925 Fullbright Ave, Chatsworth, CA 91311 
> 818-700-8727

That other supply dried up in a day or two. All sold out, but they were
also fast to the same speed specification.

-- 
73, Jerry, K0CQ,
All content copyright Dr. Gerald N. Johnson, electrical engineer