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If you can imagine a machine's three phase windings with a common point of connection, thus forming a 'star' shape, with each phase winding displaced from each by 120 degrees. The 'free' ends of the three phase windings are then connected, externally, by wires called 'line conductors', while the common point of connection (the 'star point') is (in the case of generators and transformer secondaries) earthed (grounded) and connected, externally, by a wire called the 'neutral conductor'.
The voltages measured between any pair of line conductors are called 'line voltages', and the voltages measured between any single line conductor and the neutral conductor (i.e. across individual phase windings) are called 'phase voltages'. A line voltage is the vector sum of its phase voltages, making in 1.732 times the value of a phase voltage.
What else can I help you with?
Where do you use star-star connection in electrical system?
i think its use for 3 phase connection.
How many terminals in star connection?
6
How will the speed and the slip of the motor change with increasing load in star wye and delta connection?
the speed decrease if increasing load..in star connection the speed lower
Why is star connection used in a three phase transformer?
A star-delta connection is used in transformer connection for below described reasons: 1. During transmission, the Star connection of Transformer is kept at Transmission side as Phase voltage in star connection is equal to 1/√3 times of line voltage and hence the insulation required is very less as compared if delta is kept at transmission side. By this connection there will be a phase shift of 30deg in the primary and secondary voltages. So this connection saves a lot of money on insulation and in this connection the neutral of Star connection is grounded as a result earth plays a role of reference for checking balancing of phase. 2. During Distribution, at Sub-station side Star-Star connected transformer is used and at lower distribution Delta-Star connection is used to compensate the phase shift and also to have a three phase four wire system at distribution end.
What is star dalta connection?
star delta connection is used reduce high starting current of the motor. you can see the below diagram if you need anything more details... let me know
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What is the definition of star connection?
The definition of star connection is a connection of the ends of phase windings at the star point.
How do you convert star delta connection to delta star connection?
hahahaa
Where do you use star-star connection in electrical system?
i think its use for 3 phase connection.
What is the star point of a CT?
The term, 'star point', refers to the common point of connection for the three windings of a star-connected (wye-connected) transformer connection. The star point is usually earthed (grounded) and provides the neutral point of the connection.
What are star connection?
Compared with what?
Why does an electromagnetic brake designed for a star connection not work in delta?
Probably the reason is in the different voltages between the star and delta connection voltages. An electromagnetic brake designed for the lower voltage of the star connection would burn out or open when introduced to the higher voltage of the delta connection.
Why phase current is equal to line current in star connection?
Because it is the same current, as you can determine by examining a circuit diagram of a star connection.
How many terminals in star connection?
6
How will the speed and the slip of the motor change with increasing load in star wye and delta connection?
the speed decrease if increasing load..in star connection the speed lower
How much you can save the power from converting star delta connection to star connection?
The power of a three-phase load is the sum of the three individual loads. It makes no difference whether they are connected in star (wye) or in delta.
Why star connection used in transmission?
Transmission circuits are prone to earth faults.Only star connection permits flow of earth fault current and the operation of earth fault relays.
