What is difference between dc three point starter and dc four point starter?

Question Posted / boo123pavani

3 Answers
7745 Views
Chettinad, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

What is difference between dc three point starter and dc four point starter?..

Answer / boo123pavani

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

A motor can be run for a higher speed than normal speed by reducing the field current. reduced the field current may not produce enough magnetic force to hold the handle in on position. so handle returns to off position. this is the disadvantage of three point starter.this is the advantage of four point starter. it will not returns to off position

Is This Answer Correct ?

5 Yes

1 No

What is difference between dc three point starter and dc four point starter?..

Answer / rahul jadhav

No diff.

Is This Answer Correct ?

0 Yes

0 No

What is difference between dc three point starter and dc four point starter?..

Answer / pritish

the difference between a 3 point and 4 point starter is, 4 point starter can be used for over load protection where as 3 point starter can not be used for over load protection and other difference is 4 point starter has 4 terminals and 3 point as three terminals.

Is This Answer Correct ?

2 Yes

3 No

Post New Answer

More Electrical Engineering Interview Questions

what is the full form of KVAR

6 Answers

how many units (kwh) are there if in one MW?

5 Answers

what condition there autotransformer will fail?

2 Answers

Does the Impedance of the source affects the THD

1 Answers

What is corona ? Mention its positve effects .

1 Answers

what are the needs of electrical earthing.... other than protection?

5 Answers Eskom,

If a 1.5V,3W torch light bulb is connected in series with a 15HP/11.19KW,230V single phase motor and the combination is connected against a 230V supply and switched on than what will happen keeping all other parameters as it should be A)the bulb will glow normally B)the bulb will not glow C)the bulb will glow with extra brightness D)the bulb will burn out and if a fuse is connected to the above circuit will something happen to the fuse and what about the single phase motor will it be affected? Please explain with derivation

4 Answers

Whai isPCC and MCC Difference?

1 Answers Pretech Plast,

DESCRIBE THE CONSTRUCTION ANDOPERATION OF BELT CONVEYORS AND SCR CONVEYORS , DRAW NEAT SKETCHES

0 Answers

what is LT & HT?

6 Answers

generaly all power generating devices is expressed in KVA or MVA then why power ststion is expressed in MW

6 Answers

1.what is surge 2.what is lightning 3.what is switching 4.difference between surge,lightning,switching used in power system 4.definition of surgearrestor,lightningarrestor 5.adv and disadv of surgearrestor,lightningarrestor 6.uses and purpose of surgearrestorand lightning arrestor 7.block dia of surge arrestor 8.blockdiagram of lightning arrestor 9.operation and working of surge arrestor and lightning arrestor 10.basic formula of surgearrestor and lightning arrestor 11.basic diagram of surge arrestor and lightning arrestor

1 Answers Crompton Greaves, Framo, L&T,

For more Electrical Engineering Interview Questions Click Here