[Amps] Fuses

[James R Carr]

Where pray tell do you get a hydraulic breaker? I have installed several 
thousand over the years but have yet to see one filled with oil.
As for current limiting devices, the fastest breaker will hold in for three 
to seven full cycles. To be current limiting, a fuse has to clear in less 
than 1/2 cycle.
Jim
N7FCF
----- Original Message ----- 
From: "Jim Thomson" <jim.thom at telus.net>
To: <amps at contesting.com>
Sent: Friday, January 07, 2011 4:02 PM
Subject: [Amps] Fuses


> Date: Fri, 7 Jan 2011 10:45:07 -0500
> From: "Carl" <km1h at jeremy.mv.com>
> Subject: Re: [Amps] Fuses
>
> Just dont over fuse. The usual 1200W out amp uses 10-12A; 15A for
> 1500-2200W, etc at 240VAC.
>
> Carl
> KM1H
>
> ##  why  didn't they just get off the..'get cheap program'  and use a fast 
> breaker ??
> Ideally, a 2 x pole, 15A , controlled magnetic hydraulic breaker   would 
> be the 1st choice,
> one with an..."instant trip" .    The instant trip types are the fastest. 
> They just remove the oil
> from the reservoir, so it's super fast.  The normal, slow, and motor start 
> types  just use different grades
> of viscosity for the oil used.   I use em all the time for my various HB 
> projects.   Any HB  B+  supply
> always gets a super fast magnetic hydraulic  breaker..for the primary of 
> the plate xfmr.   [they are also NOT
> affected by ambient temp either].
>
> ##  My Drake L4PS power supplies use 2 x 15A breakers, spaced a few inch's 
> apart.  One per hot leg.
> These are the simple  push button type.  [ push to re-set].   The 
> advantage  of the 2 x pole type noted above is..
> the trip bar between em ensures  both sides of the 240 line open up.
>
> ##  You would think for the megabuck that alpha charges for their amps, 
> that they would not cheap out..and use
> simple fuses !
>
> Later... Jim   VE7RF
>
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps