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Separate Switch Disconnector enclosure

fiftyhertz
Morning All, 


Why would you use a separate switch disconnector enclosure ie Schneider SEA9PNI2504, the vast majority of distriubtion boards i see have an incomer device at the base of the busbar, which could also be used as a protective device. Never really understood why a separate unit would be required?


Is there a practical reason im missing.


Thanks
Parents
  • 0
    A common isolation for the supply to a bus-bar chamber feeding many boards or with multiple supplies maybe ?

    I agree at the price they are you won't be putting them in for fun.
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  • 0
    A common isolation for the supply to a bus-bar chamber feeding many boards or with multiple supplies maybe ?

    I agree at the price they are you won't be putting them in for fun.
Children
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