HV AC Selector Switch Rating

spopepro · 27th February 2011, 03:15 AM

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...

tomchr · 27th February 2011, 04:25 AM

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.

~Tom

27th February 2011, 03:15 AM	#1
spopepro diyAudio Member Join Date: Jun 2010	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...

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
HV B+ switch	db!	Power Supplies	8	31st October 2010 08:55 AM
Contact Rating: AC and DC	luvdunhill	Parts	9	9th April 2009 06:09 PM
Switch contacts for HV supply	ThSpeakerDude88	Tubes / Valves	4	30th March 2008 03:50 AM
A Selector Switch?	JohnnyBoy	Class D	5	15th February 2006 03:33 PM
Selector switch	Rnickl	Parts	8	29th January 2006 07:12 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

27th February 2011, 04:25 AM	#2
tomchr diyAudio Member Join Date: Feb 2009 Location: Greater Seattle Area	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. ~Tom