3 PHASE DYNAMOMETER TYPE WATTMETER

Poly phase or 3-phase Dynamometer type wattmeter 

Definition: Three-Phase Wattmeter is used for measuring the power of the three-phase circuit

3 PHASE DYNAMOMETER TYPE WATTMETER 

3 Phase wattmeter 

Here we have two element. element one have CC1 and PC1 and element two have CC2 and PC2 both this system are associated with common shaft with common pointer and scale arrangement as shown in fig. 

connection diagram as shown in above 

Phaser diagram

 

•     Calculation

•  Deflection torque 

• For Spring control 

• At steady state condition of pointer 

thus pointer indicate is total three phase power