In Japan, People Get Charged Up About Amping Down | Circuit Breaker Parts

For a more detailed explanation of how to match MOVs to applications, check out the “DC Application Varistor Design Guide.”

Translucent (pellicle) mirror. Undoubtedly the biggest story of the Sony SLT-series cameras is their use of a translucent mirror. Also known as pellicle mirror, this works by allowing most light to pass through to the imaging surface beneath, while a small portion is reflected for other purposes. Sony is not the first camera manufacturer to use a translucent mirror in an SLR-style camera, with the manual focus Canon Pellix film camera from 1965 taking that credit. The Pellix was followed by a handful of other pellicle mirror-based SLRs from Canon, Nikon, and Mamiya, largely designed for professional photographers, and manufactured in very limited production runs. It wasn’t until 1989′s Canon EOS RT that the first autofocus pellicle camera was released, followed by the EOS-1N RS in 1995. Fifteen years later, Sony has become the first company to resurrect the pellicle mirror for use in an interchangeable lens digital camera.

The 20% derating is not something that everyone just knows, its part of the NEC. A 12AWG cable is actually capable of handling 30 Amps, but not according to the NEC’s derating requirements for wire temperature rise limits.

Not always, you have to think on a global scope here before saying generalizations! In the UK a lot of houses are on what they call PME or protected multiple earths, where the earth bond goes back to the substation as a extra conductor. If you are in one of these properties and are not aware of it, and have your own ground system or leakage you can end up being lower impedance than the substation ground and grounding out faults in your neighbors properties which are also on the same bond. Where I am in europe, all the houses are individually bonded to their own low impedance earth, and the inspector comes out with a megga tester and tests its impedance before they will sign you off to connect to the public supply. It has to be below 50ohms total from any gnd pin on any socket in the property I remember from my inspection. I laid a load of mesh subfloor before pouring the floor so I had no problems with meeting spec. A nice low impedance earth will make your rcd and protection devices even more sensitive also.

I had a job testing these once, and I can confirm that standard failure mode for overcurrent is some kind of explosion. Usually it was a puff of flame and dust down the leg, but occasionally we’d get a TO220 blown in half

A REAL Fotek is a good brand ….. however some dishonest shops in China are turning out fakes by the thousands ,,,,, I got burnt by a fake Fotek 25A DC SSR for a printer a couple of years ago and the 2nd or 3rd time I used it the MOSFET went up in smoke although nowhere near this spectacularly …. I ended up replacing it wtih a 100A Fotek that I could ascertain was genuine and it’s been working ever since

Still, most capitalists, when you order something, don’t ask “what do you want it for?”, so they can substitute something else without telling you. Generally in contracting with capitalists, mysterious “problems” don’t regularly as clockwork pop up, increasing the cost above what was agreed.

On the positive side, the mechanism does allow the LCD to be folded facing inwards, providing some degree of protection against minor knocks and smudges when traveling and when you’re content to use the EVF instead. The Xtra Fine LCD panel has a 921,600-dot resolution. The display also uses Sony’s TruBlack technology, which couples a reinforced glass cover plate with anti-reflective film, and a resin filling that removes the air gap beneath the cover plate, which the company says improves contrast and reduces glare under harsh sunlight.

Five vs Ten amps is a big difference in heating in the power factor correction circuit of his power supply. If you find a data sheet for similar power supplies, they are always 1-3% more efficient on 220Vac and run cooler because of it.

In line with its stated goal of setting class standards “for best in class comfort and driving engagement”, the Corolla is 4370mm long, 1790mm wide and 1435mm high, with a wheelbase of 2640mm. That makes it 40mm longer and 30mm wider than the outgoing Auris, and 25mm lower. The obvious rivals are the Ford Focus (8mm longer, 35mm wider, 19mm higher and with a 60mm greater wheelbase) and the VW Golf (115mm shorter, as wide, 17mm higher and 3mm smaller in wheelbase.

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Technically it depends on the amount of resistance, effectively proportional to the amount of the conductor the electricity is able to pass through. With AC that means the skin effect comes into play but that’s a whole other bundle of fun math. With DC it’s essentially amps times volts.