Looks Like OU Senior Member Avalon Has DONE IT! New Video!

[picowatt]

I think the small wires are for the voltage sense coil and each leg of 120v has a current coil which all work together to average power consumed.   The basic concept is over a hundred years old and is a nice piece of engineering IMO.  I assume in a smart meter instead of having a wheel turn from eddy currents there is some sort of chip that senses the currents.   Some people think that it is less accurate in hot weather than the wheel based setup.

Smartmeters are not a hundred years old.  The old wheel type only charged for real power.  It is readily apparent how the electronics of the Smartmeter would detect voltage (and power its electronic circuitry) thru the two small wires attached to L1 and L2 (those two small wires only being protected by the fuse on the pole transformer primary which doesn't sound up to code to me...)

However, if there were two current sense transformers, one for L1 and another for L2, all would seem fine and dandy.  But again, how current (and PF) is accurately sensed using just one Isense transformer is still a bit of puzzle to me.

PW

[seychelles]

Milehigh that fackery is even worst than that it started at pearl harbor when the Japaneses annihilated 5000 poor young defense personnel and then the trillion of wasted dollars to go to the moon not ,then to Vietnam and 911 that Mr Putin is going to let the whole world know on September 2016 that 911 was an inside job.. wake up people and smell the CAT VOMIT..

[seychelles]

911 WAS DONE FOR A MULTIPLE OF REASONS one great America is totally broke, so they printed billions of dollars note put on boing 747 and ship to Iraq and in infect these worthless pieces of paper suddenly had value because it is in circulation in the economical blood system of this world..plus the rest of the thousand of other reasons..i will let your imagination run wild and you will always be right. 

[fritznien]

Smartmeters are not a hundred years old.  The old wheel type only charged for real power.  It is readily apparent how the electronics of the Smartmeter would detect voltage (and power its electronic circuitry) thru the two small wires attached to L1 and L2 (those two small wires only being protected by the fuse on the pole transformer primary which doesn't sound up to code to me...)

However, if there were two current sense transformers, one for L1 and another for L2, all would seem fine and dandy.  But again, how current (and PF) is accurately sensed using just one Isense transformer is still a bit of puzzle to me.

PW

smart meters are not but the principals used are.
if you look at avalons video of the meter being taken apart, you will see the current sense coil at the top.
it has 2 heavy conductors going thru it, one going up one down, one for L1 load one for L2.
the smart meter is an electronic version of the wheel meter.

[picowatt]

Tinman,

Have a look at this jpg:

https://en.wikipedia.org/wiki/Lunar_Roving_Vehicle#/media/File:Lunar_Roving_Vehicle_wheel_close-up.JPG

This wheel design would gather up the lunar soil and then throw it out on the trailing edge.  When stopped, the soil captured inside the mesh would settle to the bottom of the wheel.  When first starting out or when moving very slowly the rover would indeed leave tracks.  Most times, however, these wheels picked up and threw out so much soil they tended to cover their tracks.

From the Wiki page: https://en.wikipedia.org/wiki/Lunar_Roving_Vehicle

"The LRVs experienced some minor problems. The rear fender extension on the Apollo 16 LRV was lost during the mission's second extra-vehicular activity (EVA) at station 8 when John Young bumped into it while going to assist Charles Duke. The dust thrown up from the wheel covered the crew, the console, and the communications equipment. High battery temperatures and resulting high power consumption ensued. No repair attempt was mentioned.

The fender extension on the Apollo 17 LRV broke when accidentally bumped by Eugene Cernan with a hammer handle. Cernan and Schmitt taped the extension back in place, but due to the dusty surfaces, the tape did not adhere and the extension was lost after about one hour of driving, causing the astronauts to be covered with dust. For their second EVA, a replacement "fender" was made with some EVA maps, duct tape, and a pair of clamps from inside the Lunar Module that were nominally intended for the moveable overhead light. This repair was later undone so that the clamps could be taken inside for the return launch. The maps were brought back to Earth and are now on display at the National Air and Space Museum. The abrasion from the dust is evident on some portions of the makeshift fender."

Cool video showing how the rover was constructed:

https://www.youtube.com/watch?v=5aDSYTMqyQw

The rovers, like every other aspect of Apollo, were engineering marvels.

Imagine breaking down further than your life support would sustain a walk back to the LEM.

PW