Answer / prdp

simply calculate the line current which 2hp motor will take
by considering the power factor.Again give some margin for
the overloading of motor.
for 3 phase motor,line rated current
= 2*746/(1.73*linevoltage*pf)

Answer / shri..

v = 415
hp = 2
PF 0.7
W = 1492

A = (1492)/(415*1.732*0.7)

A = 1044.4 /503.14

A = 2.96 Amps / Phase

Take a MCB c curve type

Answer / marlo

motor rated current on the nameplate multiplied by 300%.This will allow the MCB not to trip during starting.However each MCB has its own characteristic depending on its application.see MCB code for it purpose of application.MCB has a code for quick release and time delay trip.

Hi, My question is our total motor load is 55 kw.so what cable size required for main supply. Please reply

1 Answers   Maryam Enterprises,

---

what questions will be asked for 11/33KV licence interview APSEB hyderabad. Can any one share question and answers.

0 Answers  

---

Why we use neutral cable just half from phase cable.Tell me briefly,please.

4 Answers  

---

why starter use to on a motor

6 Answers   Emco,

---

Why Magnetic Core Balance test is performed only on Star side of Transformer and not on Delta Side of Transformer (Vector Group Dyn11)?

1 Answers  

---

a 3 phase motor was running with delta connected, suddenly one phase winding got burnt off, what will be the effect ?

8 Answers   Bhel, RRB, SR,

---

Why the brushes used in dc machines are made of carbon not from other metal?

3 Answers  

---

How to calculate the sag of OPGW during stringing???

0 Answers  

---

how can we design robots

0 Answers   Maruti Suzuki,

---

Necessity of transformer earthing

1 Answers  

---

why transformer rating is given in kva?

2 Answers  

---

What is the role of the 50 STUB protection at a GIS 400KV substation with SIEMENS protection relays?

0 Answers   Power Plant,

---