Answer Posted / m s venkateswara rao

Normally Starters are used to reduce the starting current. But selection of the starter is based on the type of application whether starting torque is required high, medium, normal.Normally any motor during starting will take 4 to 5 times of full load current.Up to 10 Hp usually will use DOL because of motor full load current is 13 Amps and during starting will take 65 Amps as a result supply system dos not get affect. Above 10 HP usually motor full load currents are high and during starting will draw high starting current which will affect out supply system ie voltage drop, for which all associated equipment connected with the system will be affected.Usually above 10 HP motors with a application of medium torque will use star/ delta starter to reduce starting current. If the application is required high starting torque will use dol starter irrespective of the rating of the motor.

How i can decide that HVDC line is best for transmission.

1966

---

How much weight an electrical engine can pull??

2144

---

I Need standard operation procedure(SOP)for 500kva Oil type transformer oil filtration & Procedure for IR value checking.

2941

---

what is active power & reactive power?

2271

---

How RTCC panel is working and give single line diagram for RTCC with transformer?

3144

---

Please, if 1kw is equal to 1.25kva; how then do I know how many kva in 7.5kw?

1729

---

What are the applications of autotransformers?

1148

---

what is spadar bar .why I use in DC generator.

1973

---

From what on-site components does the HT panel monitoring the bus-bars in a 11kV system take inputs?

2074

---

What is the magnetic field (coil DC ) of Turbo Expander?

2116

---

what is meant by skew width in machines?

2266

---

1 Ton is equal to how many watts?

1167

---

How much no load current of synchronous motor

2144

---

i need previous entrence exam papers of nhpc.

2891

---

How to calculate of maximum demand if given 628kw, 785kva, 0.8 p.f.

1694

---