On Fri, 21 Oct 2011 05:22:39 -0500, Jeffrey Angus
wrote:

On 10/20/2011 9:51 PM, josephkk wrote:
Just for grins, Jeff 1.0 have you tried spice models of the rectifier
solenoid at 480 and 240? It may help you see something you may have
missed.

It hadn't occurred to me to do that. It's pretty much of a static
operation. You apply power, it pulls up on the armature. When the
mechanism changes position, an auxiliary switch disconnects the
solenoid.

I expect you can learn interesting things looking at the current waveforms
in the various configurations.


BTW i expect you will replace the bridge with one appropriated
rated for the solenoid?

The original bridge was dealing with 480 vac @ 5.2 amps. The new
coil will present a load of about 4 amps @ 240 vac. It's not an
issue.

That does not make sense for the ampere-turns argument. The number of
turns drops dramatically thus the current must increase accordingly.


Jeff-1.0