Answer / k.prakashchandra

Potential free means 'zero potential' ,not connected to any
power supply

Answer / vels

potential contacts means the contacts are connected with some potential we cannot use our the contacts
whereas potential free contacts means it is not connected with any potential we can connect/use as per our requirement

What happens with squirrel induction machines if the ends of rotor conductors are kept open? Explain

3 Answers  

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RATING OF LIGHTENING ARRESTER FOR 11 KV LINE IS 9 KV BUT WE KNOW THAT LIGHTENING ARRESTER IS USED FOR OVER VOLTAGE PROTECTION SO WHY NOT THE RATING OF LIGHTENING ARRESTER BE MORE THAN 11KV ???????????????//

5 Answers   Hakel,

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when i am going to take trail on a 3ph sq.i/m motor 5.5kw, i observed that RPM of the motor is very low as compared to the rated RPM and also it rotates in clockwise in first ON command,and anticlock wise in second ON command. finally i observed that on phase is no available . but iam not clear about, why the motor is rotates in both directions without any phase interchanging.pls answer to my question.

1 Answers  

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Why electrons flow only one direction in semiconductors. why can not flow both directions

1 Answers  

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ups battery design formula

0 Answers   Amara Raja,

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if sf6 gas low in gis what will happen

0 Answers  

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how can we charged the battery in DG

2 Answers   MTS,

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What Is Sampling?

0 Answers   Mahatma Gandhi University,

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How to connect frequency meter in metering circuit?(single phase and three phase frequency meter)phase to phase or phase to neutral

7 Answers   ABB,

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what is power factor?

8 Answers   Adani, Blue Star, Power Control,

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Why a starter is used for a motor?

50 Answers   L&T, Nilachal Polytechnic,

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Why is copper a better conductor of electricity than aluminium?

5 Answers   AES,

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