Polyphase Wattmeters

Author: E.E. Kimberly

As explained on page 96, two wattmeters may be used to measure the total power in a three-wire, three-phase circuit. A polyphase wattmeter, in which two wattmeter elements are connected to a common pointer, costs less and requires less space than would two single-phase wattmeters with the same current and voltage range. In Fig. 16-9 is shown a polyphase wattmeter connected for use.

Fig. 16-9. Polyphase Wattmeter Connections