How to select AC3 duty contactor for DOL & Star-Delta
starters

Answer Posted / jayesh patel

We can select contactor according to the load. It there is
Inductive load we can select as Per AC3
For resistive load we can select as per AC1 Duty
For capacitor switcching we can select AC4 Duty

Is This Answer Correct ?    16 Yes 7 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What are the components connected in between the power supply coming from an electric pole to HT & LT Panels in a large commercial building or how the power supply connected from Electric pole to Transformer & then to the HT & LT panels of a building? Please send me answers via mail, my id is yogiagarwal@gmail.com. If possible, please give a line diagram.

1569


how to calculate single phase motor efficiency ?

1533


is that any software calculator to calculate the size of cable

1877


When calculating the speed of a rotor required for a particular frequency of synchronous generator we use the equation 60f/p Is this p is the number of pole pairs of rotor & do we consider the number of pole pairs in the stator is 1?

1371


How to convert 2 phase to 3 phase electricpower in induction moter?

1690






what is the difference between the characteristics of two different phase bushing of any transformer

1357


What is dynamo?How it works and what is the function of dynamo in a DG.

2100


Difference between Lugs and Thimbles

13819


What is the importance of earthing?

678


Define thermal resistance in the context of power amplifier.

615


How to convert a two phase power into a three phase power in induction machine?

1360


Name a govt approved university which have 100% online engineering course.

1279


what is the difference between c power and U power acb breaker

5312


Please define ohm’s law for a.c (alternating current)?

656


What is the effect of atmospheric pressure & Temp; on efficiency of motor? Why NGR(Neutral Grounding Resistor) is used in 132/11 KV Transformer & how? What is the use of Auto T/F in Grid Station?

1438