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.

wich types of current?

2 Answers  

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what is called inrush current??

1 Answers   KSEB,

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what is active power & reactive power?

0 Answers   Avtech, Jindal,

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What is the meaning of BREAKING and MAKING CAPACITY in case of CIRCUIT BREAKERS.

2 Answers  

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Two electric lamps 40 W, 220 V each are connected in series across 220 V. What is the power consumed by the connection?

0 Answers  

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If there are two transformer having rating of 2.5mva, 6.6kv/440v(satr-star),and the load is 600kw then what is better to maintain less losses in transformer having both transformer in parellel or only single transformer connected to load? Please give calculated answer

0 Answers   UltraTech,

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do you know measure the earth resistance?explain

1 Answers   Dalkia,

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what is cause of static electricity? I experience shock when i touch metal equipment in a room ,furher check shows earth leakage showing 80ma at the DB near to the 400 MCCB?

0 Answers  

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what is impedence of transformer? its formula

1 Answers  

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I have AC automatic voltage regulator 15KVA What output currant?

3 Answers   Siemens,

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How does MCB operate without relay..?

10 Answers   Toyota,

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why generaters need four earthings

5 Answers   Sasken,

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