Single -phase electrical meter is a type of electrical meter. The main structure of the electrical meter is composed of voltage coils, current coils, turntables, rolling shafts, brake magnets, gears, meter meter, etc.Single -phase meters are generally civilian, connecting 220V equipment.The electrical meter is an electromagnetic force to generate electromagnetic force to generate electromagnetic force by using voltage and current coils on the aluminum disk to generate an electromagnetic force to cause the aluminum tray to rotate, and at the same time introduce the power -made torque, which is proportional to the speed of the aluminum plate to the load power.Drive to the gear, calculate the transition of the turntable from the calculation device to determine the power.
Single -phase electric meter principle
When the electric meter is connected to the measured circuit, the voltage of the measured circuit is added to the voltage coil, and a transformed magnetic flux is formed in its iron core. Some of the φU of this magnetic flux passes through the magnetic pole through the aluminum disk to the return to the return to the return.In the iron core of the voltage coil; in the same way, after the current circuit current i passes through the current coil, it is necessary to form a cross -iron core of the current coil.Pass through the aluminum plate from bottom to top, and then go through the aluminum plate from top to bottom to the other end of the U -shaped core.Among them, the back magnetic board 4 is made from steel plates. Its lower end extends into the lower part of the aluminum plate, which corresponds to the core column across the aluminum plate and the iron core column across the aluminum plate and the voltage component, so as to form a circuit of the magnetic flux of the voltage coil.Since the two magnetic flux through the aluminum plate is a communication magnetic flux, and through the aluminum disk in different locations, the sensor vortex is generated near the position of the aluminum plate., Then generate a rotation torque to push the aluminum plate rotation.
How to look at the single -phase electric meter
It is a bit on top of 1.Ten, hundreds, thousands, and thousands of sequences, corresponding to X1, X10, X100, X1000, X10000.Some new meters are the smallest.In the previous reading, the last digits are decimal, which can be entered or not.
Single -phase electric meter wiring
Wiring method: There are two types of wiring methods of the electrical meter: jump in -type connection and smooth -entering connection method.These two wiring methods are not the same on the surface. The internal principle is the same, that is, the current coil of the current meter is string in the load load, and the voltage coil is connected to the load. The "*" end of the two coils should connect the power supplyThe same polar end.Generally, the single -phase electrical table has a special wiring box. When the lid is turned on, I saw that there are four wiring buttons. Which method does the actual wiring use?In a single -phase circuit with low voltage and small current, the electric meter can be directly connected to the line.If the load current is large or the voltage is high, the circuit should be connected through the transformer.At this time, the current transformer is connected with the load, the secondary and the current wiring of the electrical meter are connected in series, the primary and load of the voltage transformer is connected in parallel, and the secondary and the voltage coil of the electrical meter are connected in parallel.
Single -phase electric meter specification
The specifications of single -phase electric meters are: there are many models of single -phase electric meters, and there are intelligent and mechanical types.Different manufacturers have different models.Specifications from 3A, 5A, 10A, 20A, 30A, 40A, 60A, 80A, etc.

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