Star connection. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Electricity for beginners
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Typically, a three-phase current generator is depicted as 3 stator windings, which are located at an angle of 120 ° to each other. The beginning of the windings is usually denoted by the letters A, B, C, and the ends - X, Y, Z.
Rice. 11. Connection of three-phase generators in the "star" way
In the case when the ends of the stator windings are connected to one common point (zero point of the generator), the connection method is called "star". In this case, wires called linear wires are connected to the beginnings of the windings (Fig. 11 on the left).
Receivers can be connected in the same way (Fig. 11 on the right). In this case, the wire that connects the zero point of the generator and receivers is called zero. This three-phase current system has two different voltages: between the linear and neutral wires or, which is the same, between the beginning and end of any winding, stator. This value is called phase voltage (Ul).
Since the circuit is three-phase, the line voltage will be in √3 times more phase, i.e.:
Ul = √3Uf.
Author: Smirnova L.N.
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