In the last article, we have seen the two wattmeter method of measuring three-phase power with an unbalanced load. In this, let us see the two wattmeter method with a balanced load. In a balanced three-phase system total po…
A wattmeter is an instrument used to measure the electrical power consumed by the load. It consists of a voltage coil connected across the load and a current coil connected in series with the load. In order to measure the t…
The disadvantage of the one wattmeter method is that it cannot be used for three-phase systems that carry unbalanced loads. Also, in three wattmeter method for star-connected load, it is difficult to get a neutral point to …
A wattmeter is an instrument used to measure the electrical power supplied in a circuit. It consists of a voltage coil connected across the load and a current coil connected in series with the load. So that deflection of th…
When there is the existence of inductance and capacitance in the circuit. Due to energy storing property of inductor and capacitor, it causes voltage and current to become out of phase. In order to overcome this phase shift…
In the case of circuits that carry large currents and voltages, the measurement of power can not be carried out by normal wattmeters. Thus, there is a need for an extension of the range of wattmeter. By using instrument tra…
In practice, there are some errors introduced in dynamometer type wattmeter while measuring power. Due to which the instrument indicates a value lower or higher than the actual value. Let us see various types of errors in d…
