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Are contactor points and bimetallic strip connected to the star delta starter of 3 phase induction motor?
Shwetapatel1840070
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∙ 10y ago
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What is the Difference between a magnetic starter And a contactor?
Motor starter usually refers to the complete assembly, including enclosure, contactor, control transformer (if any), overloads, fuses (if any), etc. A contactor is really just an overgrown relay, and is just one component of a starter. That having been said, many folks use the two terms somewhat interchangably. So someone who says starter may mean contactor, and vise-versa. Go figure.
What will happen if induction motor is in star-star connected?
If a motor is connected in a star configuration it will operate at a slower speed. This is the working process that a star delta starter operates on. At first through the starter the motor starts in the star connection. When the motor gets up to its highest speed in that connection it times a timer out , the star starter drops out and the delta starter pulls in and then connects the motor in the delta connection. This allows more voltage to be applied to the motor and it then speeds up to its nameplate rated RPM.
What is the difference between an definite purpose contactor and a lighting sontactor?
A definite purpose contactor is designed (and rated) for a specific load. So a lighting contactor is one example of a definite purpose contactor. A motor starter contactor is another example. So, a lighting contactor is a definite purpose contactor, but a definite purpose contactor is not necessarily a lighting contactor (it might be a motor starter, for instance).
Why induction motor should not start by direct switching?
because IM draws 4 to 5 times the rated current when it is connected to the supply directly in order to start the IM smoothly we need starters 1.star delta starter 2.auto transformer starter DOL starter for direct starting for smaller capacity IM (upto 1HP) Note:IM means Induction motor
Do you need starter for 0.5HP three phase induction motor?
You never need a starter for a three-phase motor.
What is the standard method of starting for a large 3 phase induction motor?
Standard method would be called " across the line" simple motor starter contactor with overload protection. Connected directly to incoming power, cotactor closes and full voltage is put to motor windings.
How relay is used to control induction motor?
If you want to control induction motor using a control relay give neutral directly to the one point of coil of relay & one point of coil of contactor then give control supply through push button to second point of coil of relay. use one NO point of relay and give supply to coil of contactor. and also use one NO of contactor for holding the contactor & take OFF (NC) in the starting to stop motor after complition of work. It is jut like an Direct On-line starter.
What is the difference between a motor starter and a contactor?
Motor started will have overloads the contactor connect es line voltage.
What is the starter size Amps for 45KW 3Phase AC Motor connected to the pump?
160 Amp. MCCB 45 KW Contactor (67.5-112.5) Thermal Over Load
What is the Difference between a magnetic starter And a contactor?
Motor starter usually refers to the complete assembly, including enclosure, contactor, control transformer (if any), overloads, fuses (if any), etc. A contactor is really just an overgrown relay, and is just one component of a starter. That having been said, many folks use the two terms somewhat interchangably. So someone who says starter may mean contactor, and vise-versa. Go figure.
What will happen if induction motor is in star-star connected?
If a motor is connected in a star configuration it will operate at a slower speed. This is the working process that a star delta starter operates on. At first through the starter the motor starts in the star connection. When the motor gets up to its highest speed in that connection it times a timer out , the star starter drops out and the delta starter pulls in and then connects the motor in the delta connection. This allows more voltage to be applied to the motor and it then speeds up to its nameplate rated RPM.
What is the difference between an definite purpose contactor and a lighting sontactor?
A definite purpose contactor is designed (and rated) for a specific load. So a lighting contactor is one example of a definite purpose contactor. A motor starter contactor is another example. So, a lighting contactor is a definite purpose contactor, but a definite purpose contactor is not necessarily a lighting contactor (it might be a motor starter, for instance).
Which two metals are used in bimetallic strip in a tube light starter?
Steel and copper
Why induction motor should not start by direct switching?
because IM draws 4 to 5 times the rated current when it is connected to the supply directly in order to start the IM smoothly we need starters 1.star delta starter 2.auto transformer starter DOL starter for direct starting for smaller capacity IM (upto 1HP) Note:IM means Induction motor
What components can be changed on a contactor and a starter for rebuilding purposes?
Various components can be added and removed from a contactor. Auxiliary contacts can be inserted in front of the main contacts, as well as a time relay in the case of motor starters (star/delta starter). Usually you should fit a overload relay when you use the contactor in a motor starter, this is inserted in the main contacts at the bottom. However, the internal components like the coil may never be changed or replaced.
Why using on motor star delta starter?
because at the starting the induction motor drawn a heavy current thats why we use starter to increase the starting resistance of the induction motor!
What happens when start and stop buttons of direct on line method starter of induction motor pressed at same time?
The stop button is connected in series so will effectively override the start button.
