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  1. robinbreak

    A very simple PLC application & zero budget for hardware ??

    This is a story of rubbing two nickels to make a dime. I've been assigned to make a simple PLC application: INPUTS: two temperature sensors (thermocouples) OUTPUT: 4-20mA to drive a VFD (that operates a cooling fan) Existing equipment: Cooling fan + ABB VFD (already tested), and a PanelView...
  2. robinbreak

    690VAC distribution in USA

    Wow, didn't expect so many answers! Thanks to everybody for their contributions. The 690VAC has been specified by the OEM because of fairly large loads on a specific section of the plant. Our Medium Voltage available in the plant will be 13.8kV, but I'm not sure if I want these 4 motors (450...
  3. robinbreak

    690VAC distribution in USA

    Hi, I am part of a Canadian company that is possibly going to be awarded a job in New Mexico, USA. For this particular plant, as we're in the feasibility study phase, we are considering installing both a 690VAC MCC system and a 480VAC MCC system to build a steel shop plant. I don't like two...

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