Viewing 8 posts - 1 through 8 (of 19 total)
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  • #7568
    Black Bart
    Participant

    Hello everyone, i need a contactless dc voltage detector, of the type there is or there is not, that you work with 50 was c.c.. I kindly ask you if anyone has an idea! Thank you.

    #7570
    Amilcare
    Keymaster

    As far as I know, the system for detecting a contactless voltage is magnetic. To be able to read a magnetic field, the magnetic field must be present. Without an alternating component or a circulating current, a magnetic field is not created.

    #7572
    Black Bart
    Participant

    …exact, in fact I need to detect power failure (troubleshooting) in a 50V direct current circuit, normally traversed by a current of about 0.2A. The circuit is about 100 m, the pair of wires is sectional 1,5 mm2, placed inside a corrugated. The absence of contact is useful because I have no possibility to dissect the installation. If that's not possible, I can dissect i 50 Vcc and inject a frequency signal to search for it with a paired receiver, do you think it is possible?

    #7574
    Amilcare
    Keymaster

    With an injected signal it is simple to detect the interruption. At the weekend I try to design something simple. First I have to do the miracle of adapting an exponential output sensor with a control unit that accepts linear variation. A bit’ how to plug a round hole with a square plug. It will be tough but I won't give up.

    #7576
    Black Bart
    Participant

    …exponential and linear variation output! you might consider using an op amp in a logarithmic configuration. for my problem, I am thinking of studying a tone generator and relative probe.
    thanks and good job!

    #7580
    Picmicro675
    Moderator

    You could use a Hall effect sensor and maybe a small winding on the line to be checked.

    #8228
    maxmix69
    Participant

    Interesting discussion. How it ended?

    #8230
    Amilcare
    Keymaster

    We're still waiting for BlackBart to come back

Viewing 8 posts - 1 through 8 (of 19 total)
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