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  • Users: ariccardo
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  1. ariccardo

    Cap Bank Protection

    For a 13.8kV ungrounded wye capacitor bank with one main breaker with phase Instantaneous Overcurrent and Time Overcurrent relays and 59N on a neutral VT. How would you calculate the relay pick ups, also for the ground relays neutral to ground alarm and trip settings?? and how would you...
  2. ariccardo

    How do you calc Characteristic Inpedance & C ap of a cable?

    Can someone please tell me how I can calculate the characteristic impedance and the shunt capacitance of a cable, and what variables are required to do so or is there a website with formulas? An exampel of what I am lookign for is I need a cable with 16 pF shunt capacitance and 120 Ohm...
  3. ariccardo

    RS485 Comm Cable for Outside Use

    Can anyone please tell me what communication cable anyone one reccomends or uses for RS 485 communication outside in conduit? I use to use Belden 9742 but that is not reccomended for outside use the jacket is made out of PVC. Any help would be appreciated. Thanks
  4. ariccardo

    RS 485 Communication cable for Substatio nYard

    Can anyone please tell me what cable you use for any RS485 communication cable for outside use in a substation? I use to use Belden 9742 but it is not rated for moisture outside etc. Any help would be appreciated. Thanks

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