What is the advantage to variable frequency drive motors?

What will be an ideal response?


With conventional rack systems, parallel compressors are turned on and off by a control system and this cycling leads to a high current inrush each time a compressor starts. This starting and stopping will also lead to wear and tear on the compressors. In comparison, rack systems that use a VFD for motor speed control can adjust the compressor capacity throughout a wide range of demand that limits cycling, decreases power consumption, and increases the useful life of the compressor.

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Which type lubricant is usually NOT used in a manual transmission/ transaxle?

A) High temperature chassis grease B) Engine oil C) SAE 80W-90 gear lube D) ATF

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One of the common practices used in creating a stucco finish is to _____

a. fasten diamond mesh flat against the sheathing b. apply stucco in four coats c. apply stucco to a thickness of 3/4 inch d. use a stucco lock to prevent water penetration

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Hint: = 400 ohmsZ = 1,100 ohmsFind R in ohms. Carry the answer to one decimal place.

Fill in the blank(s) with the appropriate word(s).

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To address the service to be increased in the number of MSs in a CDMA system, it was decided to use TDMA as well. Is it possible to do so? If yes, how; and if no, why not?

What will be an ideal response?

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