Power supplies: just another detail?

Careful specification can prevent startup problems and maintenance headaches.

Power Supplies

As a chemical engineer by training, one aspect of automation that I had to pick up post-graduation was a basic understanding of electrical engineering. Although it wasn't a natural fit for me (my alma mater makes Chem Es take an electrical engineering course and the EEs a thermodynamics course to separate the wheat from the chaff), I managed to get by, but not without learning a few lessons the hard way. One of the more challenging electrical problems I faced was with the power supply for a continuous emission monitoring (CEM) analyzer system installed at the 200 foot level of a main stack. Fortunately, we had an elevator, and the stack itself was a 26-foot-diameter pipe…

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Resources

State of Technology: Workstations and enclosures

cg sot 17032EV2In this state of technology report, you'll learn the latest in evolutionary and breakthrough developments in enclosure technologies. Download it here.

Our latest issue: March 2017

March CoverIn our latest issue, we explore how ExxonMobil, Lockheed Martin and others are leading the charge to an interoperable, open and secure process automation system. Read the issue.

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Orifice flowmeter rangeability

Today’s transmitters promise high turndowns, but other factors affect accuracy.

Q: I am measuring crude oil components (water, oil, gas) in a three-phase test separator of capacity 3,000 barrels per day (BBD). I designed the orifice plates for the oil and water to be of 1,500 BBD range. However, on actual testing, the oil per well was found to be a maximum of 500 BBD, leading…

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  • Power supplies: just another detail?

    By Ian Verhappen

    As a chemical engineer by training, one aspect of automation that I had to pick up post-graduation was a basic understanding of electrical engineering. Although it wasn't a natural fit for me (my alma mater makes Chem Es take an electrical engineering course and the EEs a thermodynamics course to…

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