With a transformer...
please you give me reply to answer.
PLC logic is a digital computer used to automate electromechanical processes. The Star delta diagram is a diagram for a simple circuit that has the capabilities of starting a high horse power motor. A star delta diagram can be drawn in PLC Logic.
If the motor terminal has six terminals in the terminal box, then it can be connected either in delta or star. If there are only 3 terminal wires then the motor can not be connected in star.(it means that the motor is designed to be connected in delta only)
I assume a 3 phase, AC induction motor. A star delta starter or a soft starter can be used. A soft starter is better compared to a star delta starter, but it is more expensive.
A lot of designers will fit an under rated star contactor, partly for cost saving purposes and partly down to the fact that the star contactor will only stay energised for a brief period. Burning out the star contactor could be down to it staying in circuit too long, not changing over to delta, a timer malfunction holding in the star contactor or switch that is defective in the control circuit. Another cause could be your motor is drawing excess current.
With a transformer...
The Star-Delta control circuit diagram shows the delta contact and the main contact.
Check your Delta connections first if the phases is corresponding, and check your Circuit Breaker if it sufficiently rated.
please you give me reply to answer.
On a star delta starter a motor overload or a motor going to ground and cause a short circuit will cause the overload protection to trip. These overloads have to be reset before the motor can be restarted.
PLC logic is a digital computer used to automate electromechanical processes. The Star delta diagram is a diagram for a simple circuit that has the capabilities of starting a high horse power motor. A star delta diagram can be drawn in PLC Logic.
If the motor terminal has six terminals in the terminal box, then it can be connected either in delta or star. If there are only 3 terminal wires then the motor can not be connected in star.(it means that the motor is designed to be connected in delta only)
The three common types of starters used in a three phase circuit are DOL (Direct-On-Line) starter, star-delta starter, and soft starter. DOL starters provide full voltage to the motor upon start, which can cause high inrush current. Star-delta starters initially start the motor in a star configuration to reduce current, then switch to delta for full speed. Soft starters gradually ramp up the voltage to the motor to reduce inrush current and mechanical stress on the motor.
The Delta Star was created in 1983.
What do you mean by a 'parallel delta' circuit -is there such a connection.
hahahaa
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.