In this system shown in figure 11 the voltages are produced from one center tapped transformer winding and all voltages are in phase.
Single phase power measurement experiment.
Single phase 240 120 volt source figure 5 represents a standard single phase 240 120 volt distribution system.
Power in a nonlinear system driven by a sinusoidal voltage waveform 4.
To study and demonstrate the two wattmeter method of measuring the power in 3 phase networks.
The measurement of single phase power and power factors 6.
R feedback induction motor 415v 3 phase supply variac mv1300 w power measurement switch box feedback dc generator single phase switch resistor bank mv1100 415v 220v b delta connection 220v shunt connection m l v2 a2 watt meter vi ai a.
Calibration of single phase energy meter using phantom loading method with rss meter as standard 2.
Power in a linear system driven by a periodic voltage waveform 3.
Calibration of dynamometer power factor meter 3.
Most load situations can be modeled with the three types of load categories shown in the following list.
Figure 1 one wattmeter 4 wire.
To measure the single phase power by using three voltmeter method.
To verify thevenin.
Three phase power measurements objectives to demonstrate the line and phase relations in 3 phase balanced networks.
Two digital multi meters from the stockroom.
Now we will explain the measurement three phase power measurement using three wattmeter method.
240 volt l1 l2 loads 120 volt l1 n loads and 120 volt l2 n loads.
To measure single phase power by using three ammeter method.
Figure 10 single phase two wire and dc measurements.
Measure and record the cold resistance of the stator of the induction motor.
In order to measure the power the load current must pass through the current coil c c and hence it is connected in series with the load whereas the voltage across the load must appear across the pressure coil p c of the meter.
The total power drawn from a three phase supply is found by adding the separate values of power consumed by each phase.
This type system has three areas of loads.
The measurement of current and voltage 5.
However this method can also be used in 3 phase 3 wire delta connected load where power consumed by each load is required to be determined separately.
Electronic three phase power meter.
The connection for single phase power measurement using a dynamo meter type wattmeter is shown in figure below.
Measurement of parameters of choke coil the following experiments are required to be conducted as compulsory experiments.
One wattmeter 4 wire system the single wattmeter is connected between one line and neutral in a three phase 4 wire system see figure 1.
To measure three phase power by using two wattmeter method.
This is common in north american residential applications where one.
Three wattmeter method is used to measure power in 3 phase 4 wire circuits.
