Answer Posted / rakesh

Transformer Secondary star neutral need to be earthed.
Separate earthing pit need to be provided.

write circuit diagram for a motor rotate in forward direction once it started and when pressed the same button it should rotate in anticlockwise.

2612

---

Z transform is use when system is not a) converges b) diverges

1727

---

What is inrush current? how can calculateit? what is the affect of it?

2101

---

what kvrah y we need to take the readind of that

2156

---

how to find out cable size if load is 2800 watts, 230 volts AC supply and load distance is 1800 meters

1653

---

we have amp, voltage, kw, length detail then how to calculte copper & alluminium size of conductor of 3-phase induction motor

1516

---

How do I calculate a WTI CT ofa 1250kVA 6600/400V transformer

1802

---

what is allowed value of zero sequence impedancce of 6.6 kv nuetral earthing transformer ?what is the actual value

2237

---

What is synchro?

1229

---

I need model question papers for RRB section engineer Chennai... Please send to my E-mail Id:- maitheerainbow@gmail.com

1997

---

How much should be the load percentage for 15kva Inverter and Iinut & I output load with Calculations

2168

---

Can we test the alignment of End shield and stator of turbogenerator without rotor insertion? Also how to fix maintain the alignment at site installation?

2381

---

I am having a 42KW 3 phase electrical heating furnace, heating element is 80/20 nichrome material, my connections is made in such a way that 2 star connection compromising 2 coils per phase so totally 12 coils, shall if i use it unbalanced star condition (instead of 2 group of 3 phase or 1 group of 3 phase, connecting 4 phases of 5 phases) what will be the consequences and is it acceptable?

1723

---

operation of protection relay watchdog contact?

2457

---

What information we need to prepare relay coordination chart

2387

---