Answer / k.prakashchandra

Ceiling fan has a single phase capacitor start and run
sqirrel cage motor.The consructoin differs from other
motors as it has the rotor (armature)outside the field
(stator),sorrounding it.The field is facing outwards.The
value of capacitor is 2-4 mic farads

Answer / ravinder sharma

ceiling fan is actually a single phase inductin motor.
there are both primary and secondary sides . there is very
small air gap between them for reducing the magnetic flux
losses. there is not enough torque generated by the single
phase .so external starting torque is given by using the
capacitor.different capacitance are used for different type
ratings of fans.

A 150KW 440V motor is need to replace in the field instead of faulty one. what are the main parameter should I need to check?

1 Answers  

---

what is the formula of knowing the clabe size on any load?

1 Answers   JSW, Scan Steel,

---

why capacitor is placed in fan

4 Answers  

---

ASTM D 3455 - Standard Test Methods for Compatibility of Construction Material with Electrical Insulating Oil of Petroleum Origin has been used for Testing Transformer Oils with a product placed in it. Aged Control Oil has a Power Factor of 0.032% at 100°C. Aged Oil with a Test component has a Power Factor of 0.093% at 100°. Is this increase acceptable? If not why? How much increase is acceptable?

0 Answers  

---

what is the working principle of tube light?

2 Answers  

---

Usually in the L & T make MCC feeders' power circuit,we have BMR after the MAIN CONTACTOR.,can we interchange their position, keeping the control logic same???

0 Answers  

---

1. transformer design formula ? 2. how to calculate the primary turns and secondry turns ? 3. core types ? 4. how to find the primary current and secondry current ? 5. how to calculate the stacking factor ? 6. range of fulx density ?

2 Answers   Automation, Indian Railways, Mogora Cosmic,

---

What is the power factor,apparent power,reactive power and formula of power factor.

3 Answers   MNC,

---

Less cost of delta connection over star connection a. No fourth neautral wire

1 Answers  

---

why power dissipation is due to low frequency?

1 Answers  

---

you have an automatic voltage regulator at home for your appliances,if the voltage in your area drops from 220v to 190v,does the output of the automatic voltage regulator drops?or does it retains the 220v output?

4 Answers  

---

how can we find a burden of potential transformer? what does it effects? how can we calculate rated load of it?

4 Answers   Areva, KPTCL,

---