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Thyristor reset

I have a Eurotherm Thyrsitor that has kicked out and will not reset and was curious what the resolution could be?
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  • Hello Marvin

    Please specify Thyristor Model number.
    Other specifics as Application type
    1phase..3phase
    Transformer or generator attached
    Heater type ( resistance, Kanthal Super, InfraRed )
    etcetera.

    Check signals
    Check enable
    Check Fuses
    Check Supply

    good luck
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  • Martin,
    The elements that are connected to these power switches were running fine and the switch just kicked out. I did not feel or sense a power surge on Monday but we did have one( a good one) on Friday as the furnace was cooling down for the weekend. I have had our on-site electricians here and everything is fine. There is power to the switch across all three phases and the fuses on the switches are not blown. It is very perplexing, the units are 250A, 150A & 100A thyristors. They are the original thyristors that were installed in 2001. They are all TC2001 power switches and everything seems to be okay other than-they seem to be in a fault mode. I hope I am explaining that correctly. I am able to reset everything through my operating PC. But as soon as I start the elements the first power switch to kick out is the 250A. So not sure if these or thsi Thyristors are just done or if it's much more than that.
    I apologize for the lenghty reply but just wanted to give you as much info as possible.
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  • Sorry Marvin I was away.

    A. it is perplexing that all 3 units are down.
    Please specify kick out.
    Do they start firing and Is a fault returned after some time?
    I do think there is more to it.

    B. What are the readings from the diagnostic points?
    C. If you have comms what are the value's you read
    parameter list and Diagnostic and Status Words.

    D. Do you have a Local Eurotherm Service Engineer you may call in?
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