Answer / sindhu

force of attraction exists between two magnets......in such
a case when one of the magnet is moved in one direction,the
other magnet also moves in the same direction with the same
speed with which the first magnet was moved.the above
principle is called magnetic locking.this is the principle
of synchronous motor

Answer / radhakrishnan

Force between two unlike poles is known as magnetic locking

Answer / nilesh_sarate

In synchronous motor is known as induction motor in which
rotor received power in the form of induction just like
transformer pri. and sec. windings,
here in synchrouns motor stator winding is steady only
flux is rotating, while rotor is rotating, 90% of motors r
induction motors, rotor consist of cylindrical laminated
core with slots for carring conductors, but this are not
wires this are bars of coppers,aluminius,or alloys one bar
in each slots, this bars short circuited at end,this bars
are given slightly skew, to aviod locking tendancy of motor.
Now asuum the stator winding is parraler to which
three phase supply given and then rotating flux will
generat, now if u r rotor bars also will paraller then
there is possibility of locking., as both windings r
parralers.

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Energy metering: On the property I am renting, the supply voltage is 2 x 110 volts. These 2 x phases enter a energy meter which then exit the meter to over head lines to my house. Question 1. The meter is single phase 240 volts but is being used as 2 x phase(2 x 110volt), is this acceptable? if not, please give me the reasons. The meter details are as follows: 60Hz 15amp Imax 100 amp Kd 3,6 Wh/R 1 fase 3 hilos Model FX 231. I think it was manufactured in Brasil From this meter, the cables run along over head aluminum conductors,I estimate the cross sectional area to be 25mm diameter, but the neutral is only about 10mm square diameter, which cover a distance of 170 meters and then terminate with an underground cable of 65 meter length, total length = 235 meters. There must be a huge voltage drop over this length. This line is protected with 2 x 200 amp aluminum fuses after the meter, there is no main switch in the distribution board. These 2 phases connect directly onto 2 busbars. Surely the neutral should be the same size as the conductors if not more? Question2. What are your thoughts about this installation, should there be better protection, is the neutral too small? During the night, the lights dim then brighten all the time, this cannot be good for my electrical appliances. In my home, I only have a small electric geyser and fridge, my stove works off gas. But when i use other appliances like the washing machine or microwave oven, the light dim. The internal wiring of this house is done with solid hard drawn copper wires and of course, they have to be under rated. I am a retired electrician by trade, but not on the metering and over head mains side, my experience is on the factory maintenance side of things. Your expertise on these matters will be greatly appreciated. Please inform me how to rectify or make any improvements Kind regards, my power bill is very expensive, so I need to know how to bring it lower. Kind regards, Brian

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