Amps
[Top] [All Lists]

[AMPS] Solid State Relay for Anode Primary ?

To: <amps@contesting.com>
Subject: [AMPS] Solid State Relay for Anode Primary ?
From: davek@medphys.ucl.ac.uk (Dave Kirkby)
Date: Thu, 20 Nov 1997 11:58:48 +0000
> >Is there any reason I shouldn't use a solid state relay to switch
> >an anode transformer primary (2.5Kw level) ? I've noticed that
> >25 Amp versions are available that switch on at zero crossing.
> >Sounds like a nice way to eliminate the mechanical relay with current
>
> >limit resistor for surge protection.

I do know of an instance where a friend G8WYI got a nasty belt from the
HT supply he thought was off. Although never proved conclusively, I
believe the reason was the leakage of the solid state relay allowed the
HT caps to become charged (fortunatly not to full HT), even though the
relay was "off".

I intend using one on my next HT supply, as one can remove the power to
the primary quickly in the event of a flashover. However, I would not
rely on it completely.

--
Dave Kirkby G8WRB
Department of Medical Physics,
University College London,
11-20 Capper Street,
London,
WC1E 6JA.

Tel: 0171 209 6406 (International +44 171 209 6406)
Fax: 0171 209 6269 (International +44 171 209 6269)



--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm

<Prev in Thread] Current Thread [Next in Thread>