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  1. 86ed

    E-Stop Push-Button Implementation ???

    Hello Everyone, I wanted to get some direction or possible opinions regarding the electrical implementation of “E-Stop” push-buttons used in process related systems (for example a pump that is performing process “X” which is being driven by a medium voltage motor fed from a MV controller). In...
  2. 86ed

    SPDT switching time for Sudden Pressure Relay

    Has anyone performed any testing on a Qualitrol 900 to determine the switching time for the Form-C? In other words, the time (ms) from breaking to making. Also, would this action be a function of the fault magnitude in terms of psi/sec? Not sure of the mechanics behind this contact actuating...
  3. 86ed

    7SJ621 Motor Protection--RTD-Box Measured values??

    Is it possible to output the real time measured temp values from an RTD-Box (port C RS485) out through the System Interface(port B IEC61850)? I have looked through the DIGSI 4 Marshalling Information Groups and tried to create a CFC but was unable to find any information types associated with...

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