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Isolating transformer

Ben22
I’m looking to create a training board for apprentices and trying to come up with a way to allow energisation but keeping any faults created separate from the installation, 


im thinking of using an isolating transformer. Unless anyone can suggest another method?
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  • 0
    Depends a bit on how you intend to energise, and what load is connected. If you want things like RCDs to work on the load side, then one side of the secondary will need to be earthed, and that will be your test board neutral. This does however largely defeat the safety aspect of an isolating transformer, except that it will not trip a primary side RCD.

    Another aspect to consider is how realistic you want the faults on the test board to be - clearly re-creating a full10KA fault is not prudent, but  perhaps creating a supply that cannot blow a 13A fuse is not that realistic either . Problem is if you make it too good, it will blow the supply side breakers, which I presume is the sort of thing you are hoping to avoid.

    I'm assuming that the idea is to test folks ability to wire things up, and to show common errors and their consequences ?

    Also is something like a key switch and or a stop button a good idea?
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  • 0
    Depends a bit on how you intend to energise, and what load is connected. If you want things like RCDs to work on the load side, then one side of the secondary will need to be earthed, and that will be your test board neutral. This does however largely defeat the safety aspect of an isolating transformer, except that it will not trip a primary side RCD.

    Another aspect to consider is how realistic you want the faults on the test board to be - clearly re-creating a full10KA fault is not prudent, but  perhaps creating a supply that cannot blow a 13A fuse is not that realistic either . Problem is if you make it too good, it will blow the supply side breakers, which I presume is the sort of thing you are hoping to avoid.

    I'm assuming that the idea is to test folks ability to wire things up, and to show common errors and their consequences ?

    Also is something like a key switch and or a stop button a good idea?
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