I’m a bit spoiled as far as AC load SSRs go, since I get IDEC and Omron puck SSRs from obsolete equipment at work, but always exercise due caution when I have to go shopping for DC load SSRs. Far too much fake stuff out there, masquerading as reputable brands, some to the point of ruining the reputation of the brand. (Fotek… For the longest time I thought they were only a Chinese brand, like the various Harbor Freight “brands” that they slap on their junk tooling offerings.)
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I’m not claiming this is a new phenomenon (I’ve done some stupid things with electricity myself, before the www was even invented) but we know that the media isn’t always rational about these matters.
If you wrap your own coil, consider wrapping a thermistor or thermocouple into the windings. Insides may heat up before outsides. Expoxies have limits. You don’t want failure halfway up 50 stories, whether mangni-shoes or a load of pig iron.
One of Sony’s nifty tricks is their in-camera "sweep panorama" technology. The A33 and A55 let you shoot panoramas with the camera held either vertically or horizontally. The vertical orientation makes taller/narrower panoramas that are 5,536 x 2,160 pixels, as seen in the top photo above. With the camera held in landscape orientation, panoramas are 8,192 x 1,856 pixels.
The third incident was also while I was working for the welding repair company. I had a previously perfectly working high-pot tester and needed to test the insulation on a transformer. The tester itself failed and shorted to the case – and I took 11kv AC to the fingers just by turning the power on. That stung a bit, but I got a new high-pot out of the deal, so a net positive.
At least you thought about fuse and earth ground wire. Hopefully you also kept the thermal fuse of the iron – normally they have one to prevent fire in case of a welded thermostat contact (or short circuit in the solid state relay). And hopefully you kept or built a good case for all this (the open part of the iron).
Indeed, I did a HV Course at a functioning power station where once you had isolated an 11kV switchboard you had to grab hold of the bus bars to show the other workers it was safe to carry out their work.
can’t be said too many times: foteks are known to roll over, fart and let the smoke out. doesn’t hurt to overspec by 3-5. not when playing with fire.
Turns out my old GTX670 draws a lot more power than my new GTX1080 and, based on napkin calculations, brought my total power draw a bit too close to my 750W PSU’s limit. (200W CPU doing me no favors…)
I get called in all the time for problems with space heaters. If you leave the house while the heater is running, the connection could get loose and burn up the plug, which could start a fire. Give your space heater the space it needs, and turn it off when you aren’t using it. Learn more about how to use a space heater safely.
Yeah just what we need – another dopey ‘standard’. Putting stuff in right and using proper equipment is and has always been the solution.
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