Answer / rajkumar85

the diffrent parts in star delta starter are star contactor,
delta contactor, main contactor and mainly timer.when you
press the START button first the star contactor will engage,
and closes its contacts.at the same time main contactor also
engages through n.o of star contactor.the timer is cut the
star contact supply after a preset time delay then engages
the delta contact in to supply lines.now motor will run in
delta, (full speed).

what is the dedicated earthing

1 Answers   Reddy Labs,

---

how to put cable sizing and cable glands size for respective cable & Cable Lug size in a DB sectors???

0 Answers  

---

what is the technical term when and alternator's prime mover fails.

3 Answers   DVC,

---

which surface is suitable for NEUTRAL GROUNDING ?

1 Answers   NTPC,

---

why we use the fuse in only one wire? althrough in ac current the current flows in both directions. why the neutral wire can be taken half the magnitude of phase wire while same current returns from neutral wire?

2 Answers   Bhel,

---

what is the effect of earth on capacitance in 3-phase and 1- phase transmission line?

0 Answers  

---

How we can find the regulation of transformer?

2 Answers  

---

Will MCB tripped off, if there is an electric shock to Human body?

9 Answers  

---

IF 3 NOS.OF HEATERS,3KW CAPACITY EACH,1 NO.HEATER CONNECTED IN R PHASE,1 IN Y PHASE AND 1 IN B PHASE.THEIR END POINTS CONNECTED IN STAR.IF I CONNECT THIS STAR POINT TO NEUTRAL OR DO NOT CONNECT TO NEUTRAL.WHAT WILL THE DIFFERENCE.

3 Answers  

---

How short circuit MVA(Fault MVA) in a power system calculated for calculating number of earth plates ?

0 Answers   NA,

---

How Humming noise generated in starter motor which was used the start the engine in a vehicle/car/Truck?.Moreover Starter motor was operated in DC power supply. Can you guys clarify ?

2 Answers  

---

1) Explain why we don't link the two earthing system ht and mv on a pole mounted transformer sub-station.

0 Answers  

---