Star-delta Three-phase induction motor direct on-line (dol) connection.
Star-delta motor direct on-line (DOL) connection equipment:-
☑ MCCB ”Molded Case Circuit Breaker”
☑ Magnetic Contactor
☑ Overload Relay Contact
☑ Power Cable
☑ MCB ” Miniature Circuit Breaker”
☑ On Switch
☑ Off Switch
☑ Emergency Switch
☑ On Indicator Lame Red
☑ Off Indicator Lamp Green
☑ Trip Lamp (Overload) Yellow
☑ Control cable
☑ Watt Meter
Star delta 3ɸ Phase Induction motor direct on line (DOL) connection simulator video tutorial…
What is the difference between DOL and Star-Delta?
The (DOL) starter consists of two switches namely Green Clour and Red clour Switch using. Where the green switch is using to start and red switch is using to stop the motor. The motor is start and running indicator red lamp used, And the used stop position green signal indicator lame. Motor trip condition ”Overload” using the yellow indicating lamp. The DOL starter comprises a circuit breaker (or) MCCB (Miniature Circuit Breaker), an overload relay and contactor for protecting the motor. The two switches the motor control of the contacts.
What is the difference between (DOL) and Star-Delta?
58% voltage to each winding. Starting current is 1/3 that by DOL Starter. Windings are initially in star connection used. After the motor reaches a speed ”say, 80 %,” the connections are changed Star to delta
Where is the (DOL) starter used?
Direct On Line Starter (DOL) motor is suitable for example, a utility may require rural customers to use reduced voltage starters for motors larger than 15 kW. DOL starting is sometimes used to start connection small water pump motor, fans, compressors, and conveyor belts.
What is direct on-line starting?
A direct on-line (DOL) starter connection or across the line starter applies the full line voltage to the motor terminals and motor winding. The starters or cubicle locations can usually be found on an ELO diagram. This is the simplest type of motor (DOL) starter.
How many types of motor starters are commonly in use?
Most of the industrial operation uses three-phase induction motors as compared to any other type of motor used. There are used different techniques to start a three-phase induction motor.