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Parallel MCB with fuses to feed frequency drives

Nic
46764c050bc7511d6dcb732a28ff5099-huge-img_0667.jpg

Here you can see the frequency drive is connected to the feed via 50A fuses and in parallel with this is a 0.2A MCB. This then powers the frequency drive.

I think the 0.2A is for a pre stop to the drive and the status signal to the DCS. Could someone explain as I haven't seen this before.

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  • 0
    Odd one that.


    I hope the MCB has sufficient breaking capacity for the fault currents, also, how are they making the connections to the fuselinks?


    Why not just use a 3 phase monitor?
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  • 0
    Odd one that.


    I hope the MCB has sufficient breaking capacity for the fault currents, also, how are they making the connections to the fuselinks?


    Why not just use a 3 phase monitor?
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