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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...

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...

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...