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 5 No

Post New Answer

More Electrical Engineering Interview Questions

Is it weather conditions make any problems to the electrical equipments and if yes means is it any precautions needed?

1 Answers   Hexaware,

What is the difference between ARC & SPARK?

4 Answers   OPTCL,

why mosquito bat makes noise when it hits with a insect?

2 Answers  

Wat will happen if R-phase of an alternator is connected to B- Phase of AMF panel fed from alternator

4 Answers  

What does a permanent magnet generator do?

1 Answers  

what is the formula to convert from KVAr to current?

1 Answers   Halcrow International Partnership,

direction of tarbine& genrator

0 Answers   Sandvik,

why capacitance effect is predominant in underground cable transmission and inductance effect is predominant in over head line transmission?

0 Answers  

Stator core loss of squirrel cage induction motor compared to rotor core loss is= A equal B more C less D depends on load

2 Answers  

is oil viscosity affect on motor current?

0 Answers  

I am going to appear for the RRB Chennai Section Engineer online exam. Please send me the question papers from 2001 to date to my mail id: vsujith_rajan@yahoo.co.in

3 Answers   RRB,

what is the use of 6.6kV/6.6kV Transformer???

3 Answers  

  • Civil Engineering Interview Questions Civil Engineering (4641)
  • Mechanical Engineering Interview Questions Mechanical Engineering (3703)
  • Electrical Engineering Interview Questions Electrical Engineering (15783)
  • Electronics Communications Interview Questions Electronics Communications (2638)
  • Chemical Engineering Interview Questions Chemical Engineering (762)
  • 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 (2883)
  • Automobile Engineering Interview Questions Automobile Engineering (171)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (41)
  • Marine Engineering Interview Questions Marine Engineering (62)
  • Power Plant Engineering Interview Questions Power Plant Engineering (170)
  • Engineering AllOther Interview Questions Engineering AllOther (1335)