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When the liquefiable hydrocarbons are characterized as being hexane or higher molecular weight components, they are reported as GPM (C6+). [2] [3] However, the quality of raw produced natural gas is also often characterized by the term GPM meaning the gallons of liquefiable hydrocarbons contained in 1,000 cubic feet (28 m 3) of
Bcf – billion cubic feet (of natural gas) Bcf/d – billion cubic feet per day (of natural gas) Bcfe – billion cubic feet (of natural gas equivalent) BD – bursting disc; BDF – below derrick floor; BDL – bit data log; BDV – blowdown valve; BGL – borehole geometry log; BGL – below ground level (used as a datum for depths in a well)
The reference designator usually consists of one or two letters followed by a number, e.g. C3, D1, R4, U15. The number is sometimes followed by a letter, indicating that components are grouped or matched with each other, e.g. R17A, R17B. The IEEE 315 standard contains a list of Class Designation Letters to use for electrical and electronic ...
A high-voltage current transformer may contain several cores, each with a secondary winding, for different purposes (such as metering circuits, control, or protection). [7] A neutral current transformer is used as earth fault protection to measure any fault current flowing through the neutral line from the wye neutral point of a transformer.
Interconnections can be tied to each other via high-voltage direct current power transmission lines as well as containing internal DC connections such as the north-south Pacific DC Intertie, or with variable-frequency transformers (VFTs), which permit a controlled flow of energy while also functionally isolating the independent AC frequencies ...
A typical one-line diagram with annotated power flows. Red boxes represent circuit breakers, grey lines represent three-phase bus and interconnecting conductors, the orange circle represents an electric generator, the green spiral is an inductor, and the three overlapping blue circles represent a double-wound transformer with a tertiary winding.
A plan to replace coal, oil, or natural gas fuel with other sources to produce electrical energy. fossil-fuel power station A power plant using coal, oil, or natural gas fuel. Fourier series A set of coefficients of sine and cosine waves; this can represent a time function as a function of frequency. Fourier transform
Dissolved gas analysis (DGA) is an examination of electrical transformer oil contaminants. [1] Insulating materials within electrical equipment liberate gases as they slowly break down over time. The composition and distribution of these dissolved gases are indicators of the effects of deterioration, such as pyrolysis or partial discharge , and ...