Well Pad Power Distribution in Colorado
Pad power starts at the utility point of delivery and ends at every motor, heater, and panel on site, with voltage drop and load growth deciding most of it.
A modern Front Range pad can carry pumping units, electric submersible pumps, vapor recovery, heaters, compression, and a control building on one service. Grid connected pads usually take medium voltage to a pad mounted transformer, step down to 480 volts, and distribute through a motor control center or a distribution panel out to each skid. Long runs across an open pad make voltage drop a real design constraint, particularly on motor feeders that have to start under load. Load calculations need headroom for the wells that get drilled next, not only the ones producing today.
Underground feeders in PVC duct or direct burial cable are common across open pads, with routing coordinated around flowlines, cathodic protection, and future drilling. Where distribution equipment sits relative to the classified envelope decides whether it can be general purpose or has to be rated for the location, which is one reason MCC and switchgear placement gets settled early. Grounding electrode systems, equipment bonding, available fault current, and overcurrent coordination all tie back into the same design. Work is carried out by licensed and insured electricians to the NEC and the serving utility's requirements.
What voltage is used for well pad power distribution?
Utility primary arrives at medium voltage, with the exact level set by the local distribution system, and a pad transformer steps it down for site use. Most surface equipment on production pads runs at 480 volts three phase, with 120/240 volt control and convenience power taken from a smaller transformer. Electric submersible pumps are the exception, because their surface drives feed a step up transformer to push voltage down the well.
Can a well pad run on generators instead of grid power?
Yes, and many do while a utility line extension is pending or where no line is nearby. Generator supplied pads need the same attention to grounding, bonding, overcurrent protection, and transfer arrangements as a utility fed pad, plus fuel supply and enclosure considerations. Operators often start on site generation and convert to line power later, which goes more smoothly when the original distribution was laid out to accept a utility service without rework.
How is voltage drop handled on a large well pad?
By sizing conductors for the actual run length and starting current rather than nameplate running amps alone. Motors started across the line pull several times full load current, and a feeder that looks fine at steady state can sag enough to cause nuisance trips or hard starts. Moving the distribution equipment closer to the heaviest loads, increasing conductor size, or distributing at a higher voltage are the usual answers.
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