Answer / manoj

the motor should have high starting torque to lift
which is offered by
DC SERIES MOTOR
THREE PHASE SLIP RING INDUCTION MOTOR

Answer / arya

DC Seies motor

Answer / ravi chandra

In the case of lift and flights they need high starting
torque...
so 3 phase slip ring induction motor will be used.

Answer / amir siddiqui

DC series motor should be used because for lifting purpose there is a requirement of high torque

Torque=1speed(N)

Answer / faiz ansari

double cage induction motor

In case of 3Phase Supply, Voltage R-Earth/Neutral - 220 Y-Earth/Neutral - 220 Z-Earth/Neutral - 220 Total is -> 660Volts Then Why it is said that 3Phase supply is 440

6 Answers   Hindustan Unilever Limited,

How to address the servo drive for motor

0 Answers  

what is the design factor that affects the size of a motor ?

3 Answers   Reliance, SGI,

why control circuit voltage always chooses to be 110v and 220v? and in where it is 110v and 220v? and in where it AC and DC?

2 Answers  

Can we parallel two grid with different incoming voltage. Ex.let say one grid is 132kv and another is 220kv.

2 Answers  

Why machines are avoided to work is saturation region of B- H curve?

3 Answers  

What is the difference between Type test and Routine test?

10 Answers  

What makes the difference between 50Hz supply and 60Hz supply which one is economical and how can you support your answer...........?

2 Answers   Fertichem, Kuwait Oil Company,

why generally transformer are in star to delta or delta to star used?

8 Answers   ABB,

Testing procedure of DG alternator stability test

0 Answers   Amprotec,

1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

0 Answers  

why use in & out Diesel line in dg set.

1 Answers   NHPC,