I was wondering if someone could please tell me how to calculate conductor sizes for 2, 3-phase, 30- Hp, 460V VFD's, controlling 2, 30-Hp, 3 phase, motors? Would it be done the same way you calculate multiple motors (125% FLC of the largest motor and add the other FLC's)?
Hello,
I have 2 water wells located approximately 300 feet apart. One well has a 30 Hp, 460 V, 3-phase motor controlled by a 40 Hp, 460 V, 3-phase VFD and the other well has a 20 Hp, 460 V, 3-phase motor, controlled by a 30 Hp, 460 V, 3-phase VFD. I am thinking of buying a backup generator for...
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An island that utilizes 13.2 kV lines would like to lay submersible cable to transmit power to an island that is approximately 20km away. The depth of the water is between 150-200 meters deep. What is the best submersible cable for this scenario?
Can anyone give me some tips about grounding high voltage cables for substations? There is an existing substation and ground, but it will undergo construction because the building is dilapidated. I'd just like some input on how to ground high voltage cables ( 13.2 kV). Thanks
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I am an engineering student interning at a Utility company and would like some help understanding relay characteristics for protection settings. I was wondering if someone could explain what all this means and if the feeder relay setting is correct. Any assistance is greatly appreciated...
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I am trying to figure out why a burnt fuse cut-out on our transmission lines tripped the feeder. There are other fuses along the line and an over current relay at the feeder. A transient fault caused the fuse to burn out which caused a short that tripped the whole feeder. What...
