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

how a synchronous motor is used as a resistor,capacitor and an inductor?

3 Answers   Technocon Services,


How to calculate wire length,size & current? ( related to control panel)

0 Answers   FSS, GK Controls, Panel Tech,


why we test the core balance of the transformer?

1 Answers   Siemens,


what will happen if the field and armature both are made to rotate in a synchronous machine ?

4 Answers  


which has more heat effect(dc or ac)

4 Answers   TATA, CCEL,






what is the difference between metalhalide and mercury vapour lamp

1 Answers  


HOW WE CAN REDUCE THE CIRCUIT COMPLEX OF STAR-DELTA STARTER .BECAUSE NOW WE USING ONE TIMER RELAY & THREE CONTACTOR FOR MAIN,STAR & DELTA ?IF ANY IDEAS PLZ POST.THANK U

0 Answers  


what is negative d.c. voltage, why this voltage is used in base transciever station.

0 Answers   Vintage Air,


what is the difference between earthed system and unearthed system.. where do we use unearthed system because in electrical catalogues always cable for earthed and unearthed system is given..pls elaborate

3 Answers  


What is the full form of CNC in electrical mechines.......?

1 Answers   Alstom,


why earthing point in the 6amps/16amps socket bigger than the remaining (Phase & Neutral)points.

0 Answers  


what happens if i connect acapacitor to a generator load

5 Answers  






Categories
  • Civil Engineering Interview Questions Civil Engineering (4632)
  • Mechanical Engineering Interview Questions Mechanical Engineering (3698)
  • Electrical Engineering Interview Questions Electrical Engineering (15757)
  • Electronics Communications Interview Questions Electronics Communications (2635)
  • 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 (2877)
  • 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 (169)
  • Engineering AllOther Interview Questions Engineering AllOther (1334)