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Recent content by Shray

  1. Shray

    Telemechanique Premium Processor with PL7 Software

    I have a Telemechanique PLC with Analog and digital I/O, my question is regarding the analog inputs. Two of my analog inputs are coming from effector pressure sensors PN2224, 0 - 145 psi = 4-20mA. My problem is on the PLC input card of the tele processor, I am getting different analog...
  2. Shray

    Flourescent Lighting Question

    Hello, I am a Plant Engineer at a Factory in which money is very tight ( like everywhere else ha ha) My question is regarding lighting. Many areas of our facility have Flourescent F34 T12 Philips Alto 4 bulb fixtures with older Magnetic Ballasts in them. As a controlled test our...
  3. Shray

    Infrared Temperature of Bus plug

    I have recently installed 2 600 amp bus plugs on some 480VAC 1600 amp bus duct. Each of them are feeding chillers which draw approximately 450 - 500 amps on an ongoing basis. Therefore, out of concern, I infrared checked each bus plug with a Flir camera from the production floor...
  4. Shray

    Emergency Power Generator damaging Electronic Ballasts ?

    At my facility I have roof top substations and which some of them I have emergency back up nat gas generators. The generators provide power to 277 Volt Metal Halide Lighting for the production floor and also 277 v flourescent T8 lights with electronic ballasts in the rooftop substation itself...
  5. Shray

    Simple 3-wire

    What is the NEC 2005 article that specifies you must have ground detectors on ungrounded delta power systems ? was not aware that existed. Thanks

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