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LF: AW: FUSE TEST

To: <[email protected]>
Subject: LF: AW: FUSE TEST
From: Stefan Schäfer <[email protected]>
Date: Fri, 4 Dec 2009 18:42:15 +0100
In-reply-to: <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Thread-index: Acp0/+yNaiqZzgGlSBCmQsvim/kdtQAB9XZQ
Thread-topic: FUSE TEST

Hi mal,

 

There is also a dependence of time. I am sure you can put 1000A to a 10A Fuse, when time is short enough. I adiabatic cases it is a function of the thermal capacity of the fuse, the fuse wire volume and the melting point of the fuse wire. Therefore they are separated into fast, medium, slow. If you use a fast or super fast fuse, a 30A fuse will melt at 50A within a few seconds or earlier.

 

73, Stefan

 

 

PS: I just have finished my receiving loop with 40 windings, repaired the converter and integrated it into my K2. Now I will watch the argo screen tonight and hope for some signs. It becomes better and better J

 

Gl es dx dx!

 

 

-----Ursprüngliche Nachricht-----
Von: [email protected] [mailto:[email protected]] Im Auftrag von mal hamilton
Gesendet: Freitag, 4. Dezember 2009 17:30
An: rsgb
Betreff: LF: FUSE TEST

 

Has anyone tested the ACTUAL blow current for fuses eg 5A 10A 30A..

I often do not have fuses at the correct value and FUSE down only to find that I can run them at considerably higher amps than rated eg 30A fuses at 50A and they fail to blow. This is intermittent use say 30% - 50% in psu's used for CW and QRS3 normally in FET AMPS

This is normal fuse wire bought wrapped on card.

It looks like your PA fets could be in trouble under certain circumstances.

 

de mal/g3kev

 

 

 

 

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