What should be the overcurrent, instantaneous overcurrent, short cicuit
current settings (i.e. how many times of motor full load and what is the time
duration) for a motor?

Answer / harit

Overcurrent setting should be 120% of the Full Load Current of motor (time setting should be as per the recommendation of the manufacturer or Load characteristic)

instantaneous overcurrent & short circuit current settings should be 7 to 8 times of the full load current. Time interval to trip : should be set at zero (instantaneous).

Is This Answer Correct ?    0 Yes 0 No

Post New Answer

More Electrical Engineering Interview Questions

Why we used 690V in ACS 800 drives.Why dont use standard voltage like 415v or 1.1Kv

0 Answers   India Cements,

What is Ten Delta Test ?

8 Answers   Areva,

what is EP panel and AHS panel

2 Answers  

how to calculate cable size, olr rating, contactor rating and mccb rating,to below given details three phase motor 75 kw,415 v,.85 pf,50 hz?

5 Answers   Essar, Cabin Crew,

As a good company employee, can you report your supervisor to the company management if he or she is going against the company interest in his or her actions?

2 Answers  

How do you classify the different types of torques?

2 Answers  

2 electric bulbs of 100w,200V are put in series & the combination of each bulb is supplied to 100 V . the power consumption of each bulb will be????????

4 Answers  

which calss ct's,pt', use protection,meatering and others

1 Answers  

why ligthing is not available in switch yards?

1 Answers  

defination of loads

1 Answers  

what is Touch and Step voltages

1 Answers   Pinnacle,

Explain difference between stand by earth fault and residual earth fault protection?

0 Answers  

  • Civil Engineering Interview Questions Civil Engineering (4611)
  • Mechanical Engineering Interview Questions Mechanical Engineering (3692)
  • Electrical Engineering Interview Questions Electrical Engineering (15709)
  • Electronics Communications Interview Questions Electronics Communications (2631)
  • Chemical Engineering Interview Questions Chemical Engineering (750)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (78)
  • Bio Engineering Interview Questions Bio Engineering (30)
  • Metallurgy Interview Questions Metallurgy (95)
  • Industrial Engineering Interview Questions Industrial Engineering (199)
  • Instrumentation Interview Questions Instrumentation (2861)
  • Automobile Engineering Interview Questions Automobile Engineering (171)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (41)
  • Marine Engineering Interview Questions Marine Engineering (60)
  • Power Plant Engineering Interview Questions Power Plant Engineering (167)
  • Engineering AllOther Interview Questions Engineering AllOther (1331)