NON-SINUSOIDAL WAVES 129 



what is the indicated power before and after the connect inn to the 

 neutral is made? If a wattmeter is connected in the circuit with 

 its current coil in the neutral and its potential coil between the 

 neutral and one of the lines, what would this wattmeter indicate 

 in the second case? 



16. The voltage to neutral of a balanced, three-phase, 60- 

 cycle circuit is 184 volts, and it contains a fundamental and a fifth 

 harmonic which is 0.2 of the fundamental component. Tl 

 equal air-core reactors, each having a resistance of 5.0 ohms and 

 an inductance of 0.01 "> henry, are connected in Y across the lines 

 of this circuit. What is the line current If the neutral point of 

 t hese reactors and the neutral of the circuit are connected what is 

 the current in the neutral conductor? What is the total power 

 supplied in each case? 



17. The line voltage and the voltage to neutral of a balanced 

 three-phase, 60-cyele circuit are 230 volts and !:>! roltfl n-pect- 

 ively. The voltage to neutral contains a fundamental and a 

 third harmonic only. Three equal impedance units, each con- 

 sisting of a resistance of 5 ohms in series with a capacity of 25 

 microfarads are connected in Y across the lines of this circuit. 



(a) What is the line current What are the line and neutral 

 currents when the neutral point of this load is connected t<> the 

 neutral point of the circuit 



(b) If the power is measured by the two-wattmeter method 

 what is the indicated power before and after the connection to tin- 

 neutral is made? If a wattmeter is connected in the circuit with 



iirrent coil in the neutral and its potential coil between the 

 neutral and one of the lines, what will it indicate in the second 



case 



18. The voltage to neutral of a balanced three-phase, 60-cycle 

 circuit i> 1M1 volts, and it contains a fundamental and a fifth 



Minnie which i< D.'J of the fundamental cmnpniiriit. Three 



.al impedance ui <'h con-Uting of a resistance of 5 



ohm< in series with a ids, are connected in 



Y across the lines by thi> circuit. What N the lm ourratt? If 



the neutral point of this load i- cnnm-cn-d t the neutral point of 



the circuit what is the current in the neutral conductor What 



total power Mipplied in each case? 



19. Three unequal lamp loads are ted between the 

 lines and neutral of a balanced three-p reuit. Tin- line 

 voltage is 230 volts and the voltage to neutral i- k nown to contain 



