Circuit Diagram Of Wattmeter
The current coil of both the wattmeter connects across any two phases say r and y.
Circuit diagram of wattmeter. Consider the circuit has two wattmeters. Arduino uno or nano. We connect these two terminals of an electrostatic wattmeter across the load circuit of which we measure the power.
Wattmeter design chapter 8 dc metering circuits pdf version. What does a wattmeter indicate. The instantaneous torque acts on the pointer of the wattmeter and is given by the equation where i p pressure coil current i c current coil current.
The upper part of the circuit is the measuring unit and the lower part of the circuit is the computation and display unit. The resistor r2 must be twice the power of amp you are going to measure. To calibrate the device connect the output of the amplifier to port 1.
For measuring the voltage a voltage divider circuit is introduced to utilize a 10 kω and a 2 2 kω resistor. In the sensor part of the circuit there are two sections that are responsible for measuring the voltage and current. Working of arduino wattmeter.
If 1a bridge is not available make one with four 1n 4007 diodes. The connection diagram of this instrument is given below. Audio watt meter circuit diagram with parts list audio wattmeter circuit diagram.
The mutual interference is the phenomena. Power in an electric circuit is the product multiplication of voltage and current. The first coil is called current coil and the second coil is called pressure coil.
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