Answer Posted / er. nitin sonkar

when a motor is connected in star the the line current is
equal to phase current but line voltage is equal to root 3
times the phase voltage.

and when motor is connected in delta line current is equal
to phase current divided by root 3 and line voltage is equal
to phase voltage

why ht motors are star connected?

1817

---

difference between Ac and Dc mcb ????

1566

---

How much weight an electrical engine can pull??

2031

---

In a tap changing transformer where is the tap connected, is it connected in the primary side or secondary side?

1078

---

How does zener phenomenon differ from avalanche breakdown?

1105

---

how does a submersible pump work..?

1889

---

What do you mean by screen of power cables?

1715

---

11 kg trivevter meter has rating of -/5amps. And pt ratio11000/110v and is connected with 11kv ct/pt unit of cr ratio 75/5amps. And pt ratio of 11000/110v while checking accuracy of meter with HT Accuchek meter what value of PT ratio and CT ratio to be filled in Accuchek meter

1874

---

How much inductance or resistance require as a starter in series with induction motor of specific capacity(e.g. 5 hp) ? What is formula for it ?

1910

---

what transformer we used normally and upto which kva?

1896

---

-What shall be short circuit current of LV switchgear for a 1000 kva, 11.415kv, 3 phase tranformer with 5% reactance.

2066

---

How the annunciator works ? How to do its wiring

2239

---

On a 6 KVA UPS we have to provide a DC MCB for Battery bank of 16 nos (12 V 42 AH). What Shall be the current rating of DC MCB ?

2570

---

if the armature current in a dc generator is ac ( sinusoidal ) why doesnt the sjhape af armature mmf a sinusoidal (ni) ? armature mmf in case of a dc machine is triangular.

1930

---

what reason of line current and phase current in star connection and line current and phase current not equal in delta connection?

2041

---