Table of Contents
How does a 3-phase power meter work?
The principle of working of a 3-phase energy meter is similar to the single-phase energy meter. When the load is connected to the meter both the pressure coil and the current coil of the two elements mounted on the shunt and series magnet produces magnetic flux.
What is a 3-phase 4 wire system?
Three phase, 4-wire distribution system This system uses star connected phase windings and the fourth wire or neutral wire is taken from the star point. If the voltage of each winding is V, then the line-to-line voltage (line voltage) is √3V and the line-to-neutral voltage (phase voltage) is V.
How do you read a 3-phase energy meter?
It shows the basic technical information about the meter and its serial number. Each meter is assigned a unique individual serial number, and the first four digits are the meter code followed by a six digit serial number. These indicate the active voltage presents of each phase.
Why do we use 3-phase 4 wire?
Three phase four wire system is the common distribution system for domestic supplies because it gives a choice of single phase voltage as well as three phase voltages; and allowes unbalances too.
How many terminals does a 3-phase energy meter have?
For Three phase Energy meters:- For installation of these meters there are 12 No. s terminals 6 no. s for three phase power supply at Input and 6 no’s for output power supply .
How does a phase meter work?
It works on the principle of induction motors. The principle of rotating type phase sequence indicator is similar to that of a three phase motor. The clockwise direction rotation of the disc indicates the sequence as RYB, and the anti-clockwise rotation of the disc indicates the change in phase sequence.
What is the voltage between two phase and three phase wires?
The distribution is generally single phase two wire and three phase four wire. The voltage between any phase wire and neutral is 230 volts and between any two phase wire is 400 volts.
What is the function of neutral wire in 3 Phase 4 wire?
Where supply is to be given to a large establishment like hotels, offices, hospitals the system of three phase four wire supply is adopted. It consists of three phase wires and a neutral. The function of neutral wire in 3 phase 4 wire system is to serve as a return wire for general domestic supply system.
What is a balanced three phase Wye Circuit?
In a balanced three phase wye circuit the phase currents of all three phases are of the same magnitude as the line currents, and all three currents are at the same lead/lag angle. The phase voltages are at a magnitude that is a fixed ratio of the line voltages.
What are the different color codes used for energy meters?
In different countries RYB, ABC (old standard) or UVW (newer standard) and maybe others (as Electrical Wiring Color Codes) are used and are equivalent. The setting may be different in other type of kWh or energy meter in different locations around the world. For safety.