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  1. 0831

    Star - Delta with two motors

    I guess nobody has an answer?
  2. 0831

    Star - Delta with two motors

    My Problem is this: I have two 150kw 3ph motors sharing a multi belt rotor, i need to wire this so that one motor starts in star which means the other motor is turning with it at the same speed then when the delta contactor/s kick in BOTH motors will be powered in delta, do i achieve this with...
  3. 0831

    3 ph 415v AND a neutral ??

    thank you for all your comments, I have now dismantelled the generator set, it is also mounted on the same framework as all the motors ( delta and star/delta run on this trailer) i have trace what appeared to be an unmarked neutral which is bonded to an earth cable of the same size (approx 240mm...
  4. 0831

    3 ph 415v AND a neutral ??

    thank you waross!, this is a mobile crusher, all the equipment is mounted on a large flat bed trailer. the main feed comes from the generator mounted at the front of the trailer some 7 feet in the air, it is 3 phase 600 see photo for the amp rating of the main switch on the genny. a 185mm 4 core...
  5. 0831

    3 ph 415v AND a neutral ??

    thanks for your comment, i guess what i really want to know is - do i connect the fourth core ( using it as a main earth to the control panel)of my swa to the bar at the right of the phases in the pic ( the other end to the main earth in the control panel) or do i connect it to the main frame of...
  6. 0831

    3 ph 415v AND a neutral ??

    i am installing a large three phase generator (inner cables are 240mm feeding a 630 amp breaker) see pic. in the panel on the genny there are 3 phases plus another connection to the side of the breaker in the pic which i am lead to believe is a neutral connection, this feeds power a control...
  7. 0831

    star delta rotation ?

    Thanks for the replies, I have to say that were I totally on my own then "bump" tests would be done in the absence of test instruments, yes i remember (thanks marke )now my old ex navy mentor telling me off several times for not rmembering whilst i was his apprentice. The second part is: using...
  8. 0831

    star delta rotation ?

    Hello to all and thanks for all your very informative input, i have searched through the forums but don't seem to be able to find my answers hence my questions, it has been a few years since i installed motors so my knowledge was rusty, I am wiring a 45kw 3ph 415v motor and am taking 2 16mm2 swa...

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