Google’s Night Sight for Pixel phones will amaze you | 220v Contactor Relay

I’ve been bit in a big way only three times. Two of the three were “Trust but don’t verify” issues, and I learned from them – always verify, no matter what anyone says.

I have to say in this case it’s probably a necessity to get anyone to look at the photos, so humdrum is the subject matter

Actually most power panels I have worked on alternate phases as you go down the opposite rows, not one phase on each side, 240 breakers take up 2 breaker spaces on one side of the panel using alternate legs.

Of note, too, is the fact that there is a choice of just two petrol hybrid engines, a decision Toyota says is down to there being no significant customer demand for either a straight petrol or diesel.  There’s the 121bhp 1.8-litre motor currently used in the C-HR and Prius, plus a new 2.0-litre version with 178bhp, each attached to different hybrid systems. These will be offered with the hatch and Touring Sports (estate), which will be sold in the UK.

My first thought was that the terminals were over torqued rotating the blocks, stretching the pins, and tearing the pads.

Though, how ever, even with a heat pump, one could lower the power bill a bit more if one takes the power when it is cheapest.

A residual current circuit breaker. Jimbob82 [Public domain], via Wikimedia CommonsA residual current circuit breaker compares the current flowing in the live mains conductor with that flowing in the neutral. In a normal situation these currents will be identical as current flowing out one must flow back in the other. If they differ, it is likely that the missing current is due to a hazard or fault, and the circuit breaker is activated. So if the power shorts to earth through your body rather than the normal return path, it is detected and cut off. It is important to understand that a residual current circuit breaker will not protect you from circuits on the other side of an isolation transformer, however this is to provide some protection for the other circuits on your bench. You may well find that the wiring codes in your country mean you already have a residual current circuit breaker in place.

One of the best demonstrations I’ve ever seen, was at the Dayton hamvention. DP&L (Dayton Power & Light) set up several short poles with standard 7200 to 220 center tap transformers. By back feeding the secondaries with 220 from the breaker box, they could energize the 7200 lines and began demonstration what happens when you encounter these wires with numerous items. Antenna masts, kite strings, and even a hot dog were used to show the immense power available, and the audience was always suitably impressed.

Ah, sō desu ka… Time to get some more iron in my diet, if I’m going to continue this dangerous hobby.

2. At the 1.8V voltage drop Mattias Wandel mentioned in the video, his SSR was dissipating about 40 Watts of energy and the metal bast plate he mounted the SSR to was not sufficient for dissipating 40 Watts of heat energy.

Everything else on the datasheet are useless observations only true under test conditions. A few really awesome datasheets give junction to ambient, which is a blessing if you don’t need a heatsink.

1. 25A for 22A? Too close for my comfort. 2. A thin sheet of aluminum is not much of a heat sink. 3. Sitting on top of the hot water heater means ambient temp is going to be a bit higher. 4. Summer in a garage is likely to get hot.