In this post, you will learn about 3 phase voltmeter connection diagram, in the last post you will learn about the voltmeter connection for single-phase and DC supply. As you know in our main panelboard, we install voltmeter to measure the voltage in a circuit. In the three-phase, we need two voltmeters to measure the voltage. or we need a voltmeter selector switch to measure the voltage of 3 phase system, however, can also measure the voltage between the line to line and line to neutral.
3 Phase Voltmeter Connection Diagram Line To Line
In the 3 phase voltmeter connection diagram, I have shown two voltmeters for 3 phase, the first voltmeter measure the voltage between Line 1 to Line 2 and second voltmeter measure the voltage between Line 2 to Line 3.
In the above 3 phase voltmeter diagram, the L1 and L2 is connected to voltmeter 1, L2 and L3 are connected to voltmeter two. So the first voltmeter will show voltage between Line 1 and Line 2. The voltmeter two will show voltage between Line 2 and Line 3.
Note that the wiring of a digital voltmeter for 3 phase is different, to wire digital voltmeter you will also provide the neutral wire. The neutral and line wire for circuit and two lines. However, it's will different and you need to read the diagram and ratting voltage. Soon I will write about the 3 phase digital voltmeter wiring diagram.