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  1. cvance

    Electrical loads and fan assisted transformers

    The rated output of a transformer may be increased with the addition of cooling stages in the form of fan packages, forced oil, forced water, as well as a combination of two or more of any of these. In the case where you have an additional fan package your transformer nameplate would read...
  2. cvance

    Capacitor and Inductor Basics

    “If inductors make the current lag and you add caps to make the voltage lag this is just bringing the p.f. closer to unity.” – in simple terms, yes this would be true. “But whether it is at unity or not the inductors still need kvar to build up the magnetic field. The caps are now supplying the...
  3. cvance

    Relay Control House Smoke Alarm Options

    Typically the use of a single station hardwired detector with a dry contact closure is all that is used. An input signal from your SCADA equipment at the control house would be used for wetting the contacts. This signal would be an individual trouble signal reporting to a central data...
  4. cvance

    Reclosing (re-energizing) underground transmission cable after a fault

    To answer your question simply, the capacitive charge that occurs on an energized line would dissipate naturally as a standard decay of your RCL circuit. This RCL circuit would be determined as a model of your transmission line parameters. If your transmission line is less than 50 miles, the...
  5. cvance

    Anti-theft solutions for copper cables: questions

    Not sure of your exact problem, but it looks like you are looking for solutions for current carrying conductors. rterickson's suggestions for ground conductors are two suitable methods for bare conductors. Copperweld conductor typically deters thieves at the site (harder to cut). Although if...

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