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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 27th February 2011, 03:15 AM   #1
spopepro is offline spopepro
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Default HV AC Selector Switch Rating

I am planning on using the Edcor XPWR144 (which has had some banter related to it in these parts) in my Simple SE. I would like to use the two different HV taps, as the transformer is wired 380-320-0-320-380. My first thought is to use a DPDT switch, run each tap to each side and the common pole to the rectifier. However, the 6A 125v rating on the switch has me worried.

If I -never- flip the switch while power is applied, am I ok? I suspect the problem is more related to arcing while breaking a connection as opposed to melting or breaking down internally as the dielectric rating is 1000v. But, I'm no EE and I just want to make sure...
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Old 27th February 2011, 04:25 AM   #2
tomchr is offline tomchr  Canada
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The 6 A, 125 V is probably the contact rating. Still, I wouldn't use a 125 V switch to switch 380 V AC (that's close to 500 V peak).

I suggest that you connect the wires of the secondary to a terminal block and just move the connections to change voltage.

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