Traditional Culture Encyclopedia - Traditional stories - How to answer the old rice noodles?
How to answer the old rice noodles?
The old watt-hour meter is a mechanical turntable instrument, which is mainly composed of voltage coil, current coil, aluminum turntable, permanent magnet and transmission counting device. The voltage coil is connected to 1 pile and 3 piles inside the meter, and the external connection is to the live wire and the zero wire, so it is permanently energized; The current coil is connected with 1 pile and 2 piles inside the meter, and connected in series with the power live wire and the load live wire outside. When the load device is turned on, current flows. The aluminum disk is induced by the alternating magnetic field generated by the voltage coil and the current coil, and the two eddy currents interact to push the aluminum disk to rotate. Please refer to the figure below.
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