Answer / mohd hakim

its an emergency rescue device whenever elevator stuck between two floors its sense and open the door of the elevator to the nearest floor after 3 minuteswith the help of dc batteries.

How will polarity test of Dy5 transformer ?

2 Answers   BSL,

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how to do the ductor test?

0 Answers  

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For fixed primary voltage how does secondary terminal voltage of a transformer change if the pf of inductive load is raised from 0.7 to 0.9 with load current remaining fixed ?

1 Answers   GATE,

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why we are using large cross section cable at load side and small at other (11kv to trsfr)side of transformer? when the load increses current at both side increases,right?

2 Answers  

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how to select battery for 15 KVA UPS with formula

0 Answers  

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what is meant by boost charge in batteries

1 Answers   MTS,

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how ti maintain the power factor in power generation

1 Answers  

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which braking is used in traction motor and what is its working send at mukeskumar27@hotmail.com

2 Answers  

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In ups static switch if i gives the supply at output end it will open the circuit in stactic switch or not if it will open then how it operates.

0 Answers  

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What are root loci?

0 Answers  

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which one cable has a more resistance.A big or small

2 Answers  

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without any excitation we can strt any dc or ac moter?

6 Answers   Bhel,

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