what is the function of NAT & NAC contacts in breaker
control switch (TNC)??

what is the function of NAT & NAC contacts in breaker control switch (TNC)??..

Answer / k.prakashchandra

NAT- normal after trip and NAC normal after close.These are
'lost motion contacts' which indicate last operated position
of breaker .With NAC contact we get 'Auto-trip' indication
when the breaker is tripped by relay.

Is This Answer Correct ?    9 Yes 4 No

Post New Answer

More Electrical Engineering Interview Questions

Why short ckt does not happen when solenoid coil connected to supply. as its a wire only.

1 Answers   Siemens,

What are the function of different components of servo motor?

0 Answers   BARC, Parle,

Why the magneti fields are not passes from southpole to north pole

0 Answers   SGML,

how define the torque in ac drive. from electrical side in the drive friquency ,voltage and current three factor is there.

0 Answers  

In a synchronous motor armature current flows due to revolving flux which in turn rotates the load,but in no load condition armature current is zero hence thr is no revolving flux then how motor rotates?

9 Answers  

what is the type of winding connection( star or delta) in 1HP to 5HP motors. How to check the motor winding connections( star or delta) if not provided in the nameplate?

5 Answers  

please tell me, how i clear the objective test? when i studied form the one book after i solved the objective ,that time i solved that qes. but if i tried solve objective form the other book then i could not solved these que.

0 Answers  

in parallel operation of power transformer why the distance between power transformer and capacitor bank feeder is necessary to know

0 Answers  

why transmiision rating in kva?

4 Answers  

What is the relay function?

2 Answers  

which is more dangerous A.c or D.C?

26 Answers  

What is advantages of ungrounded neutral?

2 Answers  

  • Civil Engineering Interview Questions Civil Engineering (4622)
  • Mechanical Engineering Interview Questions Mechanical Engineering (3695)
  • Electrical Engineering Interview Questions Electrical Engineering (15736)
  • Electronics Communications Interview Questions Electronics Communications (2633)
  • Chemical Engineering Interview Questions Chemical Engineering (761)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (79)
  • Bio Engineering Interview Questions Bio Engineering (30)
  • Metallurgy Interview Questions Metallurgy (95)
  • Industrial Engineering Interview Questions Industrial Engineering (199)
  • Instrumentation Interview Questions Instrumentation (2868)
  • 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 (168)
  • Engineering AllOther Interview Questions Engineering AllOther (1331)