is it necessarry to charge the battery of ups always??

3 Answers  

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what is impedence voltage

1 Answers   Thermax,

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WHY MOSTLY Rph IS USED FOR CONTROL CIRCUITS AUX. SUPPLY ?

0 Answers   UltraTech,

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what is formula in determining the size of Circuit Breaker for transformer with the following specifications. 7 units of 1600 volts (primary) and 400 volts (secondary). Both Primary and Secondary will have a circuit breaker which is SF6. What should be the Switchgear Main Breaker Size anf the sizes of each brances Circuit Breaker for Primary.

1 Answers   ABB,

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AL=0B9H,bl=75H, ADD AL,BL AL=____________? CF________? OF___________?

0 Answers  

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why the motor is rated as kw& transformer as kva

7 Answers   Areva,

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how calculate gd2 of ht motors

0 Answers   Hindustan Copper Limited,

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what is the function of turbo charger in disel generators

1 Answers   Kirloskar,

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what is difference between induction motor&servo motor.what r types of servo motor?how it works?

1 Answers  

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what is the diff between earth leakage relay and earth fault relay?

7 Answers  

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why the rotor is outside in case of ceiling fan?

1 Answers   HCL,

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What is making & breaking current ???

0 Answers   JLL,

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