[TCML] China meters, completed control cabinet

["Jim Mora" <wavetuner@xxxxxxxxx>]

Hi Group,

 

Has anyone tried the China made panel meters? The illuminated blue
background ones look sharp. I have set up three analog meters, 0-300Vac,
0-75Aac, and 0-15Aac. Thanks goes out to Bert Hickman for teaching me
indirectly (like learning to fish) how to shunt a meter! Seems foreign
calculating the resistance of #6awg and cutting it to 6" or so for a
resistor; silver bearing solder changes the lug resistance!! 

 

I am wondering if the digitals would survive the EMI and HF transients that
manage to make it back to the control cabinet (hopefully not much). I will
have the analogs online as well. A cheap goose neck halogen desk lamp was
disemboweled and mounted to the frame that is on a dimmer like a DJ setup to
see the meters and controls. I am ready to move on to the HV cabinet now.
Hurray!

 

I'll post a couple of pictures on the web so the younger folk can see old
school ;-) The schematics are similar to others with the usual contactor's
latch, emergency stop mushroom, dead man switch, filters, and the addition
of a PWM ASRG circuit. Current control is a sat reactor driven by a small
rectified variac, Voltage control is via a Superior 1256D that is
horizontally stackable-all in a 28" high 19" rolling rack mount caninet.
Everything stays cool at > 60amps for several minutes into several turns of
#10 wire. The sat reactor buzzes like crazy but stays ambient. It was
scrounged out of a scientific oven with 5000 hours on it. I guess the
windings are loosened and rattling. I'd love to submerge it in something. It
has a silicon steel wound type of core.  Anyone have ideas on that? Thanks
Jack for the find!

 

Looking for bigger sparks!

Jim Mora

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