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What is the difference between a four point starter and three point starter?

November 17, 2017 by Jhumel

DWQA Questions › Category: Basic of Electrical Engineering › What is the difference between a four point starter and three point starter?
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Jhumel asked 6 years ago
3 Answers
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lina answered 6 years ago

The shunt connection in four point starter is provided separately form the line where as in three point starter it is connected with line which is the drawback in three point starter.

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bhelas answered 6 years ago

In three point starter NVR (no voltage relay) is series with shunt if voltage falls certain value NVR De energized due to insufficient magnetic field and motor turned off. But in four point starter NVR energized directly from DC supply thus the draw back of 3 point starter rectified.

 

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greenland answered 6 years ago

The basic difference in 3 point starter and 4 point starter is in the connection of NVC(No volt coil).
In a 3 point starter the NVC is connected in series with the field winding.
And in a 4 point starter the NVC is connected to the 4rth coil.

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