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A star connection is one with 3 hot conductors returning power to a (usually grounded) common return (neutral) conductor. If the three hots are called A, B, and C, and the neutral is called N, then the three phases are connected AN, BN, and CN. If the star connection is balanced, (it must be, for efficient use of power), then the three hots are also equidistant from each other, though with a different voltage, so you could rewire as delta. (A typical 13.2kv system in the US is 13.2kv phase to phase, and 7.6kv phase to ground.) A delta connection is one with three hot conductors returning power to each other. Using the earlier convention, the three phases would be connected AB, BC, and CA. The ground connection is connected to the frame as a safety, but it provides no power. The choice between star and delta is one of design objective. If your load requires three phase power, then it cannot tolerate loss of even one phase. In that case, it would not matter if you chose star or delta, but you must consider the different voltage in each configuration. If your loads, such as in multiple and distinct star connections, do not require three phase power, then loss of one phase only affects one third of the system, but it you wired delta, then loss of that one phase leaves you with only one third of the system operational. If the neutral conductor is not balanced, such as in a quadraplex connection where there are three phases, with the neutral being at the 120/240 split phase point in the middle of one phase, then star connection is not possible. If you wanted star in this case, you would need three Transformers with the primaries wired delta and the secondaries wired star.
What else can I help you with?
How do you convert star delta connection to delta star connection?
hahahaa
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.
What are the problems associated with the three-phase transformer connection?
One must check the design of the transformer windings. STAR - Delta or Star to star or Delta - star or Delta Delta. Wiring must be done accordingly.
What is a forward-reverse star delta?
A forward reverse star delta is a two in one motor starter where a motor first runs on star connection and then changed to delta connection after a time which has been set. The motor direction can be changed, whether forward or reverse
What is the difference between a Y - delta starter and a star - delta starter?
No difference. Y is used as a symbol to indicate the star connection.
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.
Can you make star delta connection with 2 contractors?
yes
Show the wiring connection and star delta control panel?
11kwmotor
How many contactors are used in a star-delta starter?
A star-delta starter is a common method for reducing the starting current of three-phase induction motors. It temporarily connects the motor in a star (Y) configuration during startup, then switches to a delta (Δ) configuration for normal operation. The switching between these configurations is achieved using contactors. Typically, a star-delta starter uses three contactors: Main Contactor (Line Contactor) – This connects the motor to the power supply. It remains energized during both star and delta operations, ensuring the motor receives power throughout the start and run processes. Star Contactor – This connects the motor windings in a star configuration during the starting phase. By doing this, the voltage applied to each winding is reduced to approximately 58% of the line voltage, which significantly lowers the starting current and reduces mechanical stress on the motor. Delta Contactor – These switches the motor windings into a delta configuration once the motor reaches a certain speed. This allows the motor to run at full voltage and deliver its rated power. The coordination of these three contactors is usually managed by a timer or a control circuit, ensuring smooth transition from star to delta. A star-delta starter requires three contactors: the main, star, and delta contactors. Each plays a vital role in reducing starting current, protecting the motor, and ensuring efficient operation. Proper selection and installation of Lauritz Knudsen contactors are critical for reliable and safe motor control.
Circiut diagram of star delta connection?
i don't know please help
How do you wire a three phase motor with two speed?
Star and delta connection
What happens when a phase gets short and also when it get opened in a delta and star connection?
In star connection when two phase is short,it work as single phase system. In delta when one phase is open ,it work as a single phase.
