Social Sciences, asked by senthilnathank004, 8 months ago

whats the difference between UPS and ARD

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Answered by bzainaba73

Answer:

hope it might helps u!!!!

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Answered by moksh5677

Answer:

A UPS for elevator is inserted between the source of power (typically commercial utility power) and VVVF controller. ... device (ARD) is used in traction lifts, to assure the car return to floor and the door opening in case of main power failure.

Hope it helps you...

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