What would you like to do?

How does a watt-hour meter work?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

There are a couple of kinds of watt-hour meters: one is an electromechanical type (the one with the spinning wheel), and the other is a solid-state type. The solid-state types generally use a current transformer to measure the current produced in the current-carrying conductors, which means that the current carrying conductors need not be connected to the actual measuring device.) The electromechanical type uses an aluminum disc acted upon by two coils. One coil is positioned in such a way as to produce a magnetic flux in proportion to the voltage on the disc, and the other coil produces a magnetic flux proportional to the current. This causes the disc to rotate at a speed proportional to the power (voltage times current) being used. A permanent magnet is also installed in such a way as to exert an opposing force in proportion to the rotating speed of the disc. This causes the disc to slow down and stop when energy stops being used. The aluminum disc is also attached to a worm gear which drives the register.
3 people found this useful
Thanks for the feedback!

How do blood glucose meters work?

Blood glucose monitors use capillary action to mix a sample of blood with glucose oxidase. This mixture, gluconic acid, mixes with yet another chemical called ferricyanide to

Where can you get a watt meter?

A watt meter is what the power suppliers have on the side of your house to monitor the use of electricity going into your home. These can also be bought at electrical wholesal

What is the Working principle of Energy meter?

The metallic disc is acted upon by two coils. One coil is connected in such a way that it produces a magnetic flux in proportion to the voltage and the other produces a magnet

How does btu meter work?

BTU meters measure the energy content of liquid or gas flows in  British thermal units (BTU), a basic measure of thermal energy. One  BTU is equal to the amount of energy ne

Q meter works on the principle of?

    Series resonance

How do flow meters work?

By using gravity force, a flow meter has many functions. One function is measuring lung capacity and another is measuring fluid by ultra waves. There are various types of flow

What is the working principle of a q-meter?

  Q-meter works on the principle of Series Resonance

How does a pH meter works?

A pH meter is the same as a voltmeter, look up them for more information.

How does a creep meter work?

A Creep Meter uses a wire stretched across a fault to measure horizontal movement of the ground.

What is the difference between the watt hour meter and Var hour meter in terms of internal connection and work theory ie When the meter records watt-hour an when the meter records var hours?

Only watts (power) can produce work (energy) because of the phase relationship of the voltage and current in an alternating current, electric power system. With watts, the por

How does a moving coil meter work?

  Instrument used to detect and measure electrical current. A coil of wire pivoted between the poles of a permanent magnet is turned by the motor effect of an electric cur

What does a watt meter do?

A watt is the electric unit of power. Amperage x voltage = watt. 746 watts is one horsepower. A wattmeter measures power.    Answer A wattmeter measures the voltage appli
In Uncategorized

How does a fuel metering valve work?

it meters how much fuel is being injected into the turbocharger at max boost around 55psi (low boost) and if there is to much fuel it sets of a warning

How does a DC clamp meter work?

a DC clamp meter works on the principals of what is called "Hall  Effect." The meter creates a magnetic field, and the DC voltage  passing through the wire interacts to crat