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Generator separately excited by battery Self exciting generators Series on left, shunt on right. A shunt generator is a type of electric generator in which field winding and armature winding are connected in parallel, and in which the armature supplies both the load current and the field current for the excitation (generator is therefore self excited).
A diagram of a pumpjack. A pumpjack is the overground drive for a reciprocating piston pump in an oil well. [1]It is used to mechanically lift liquid out of the well if there is not enough bottom hole pressure for the liquid to flow all the way to the surface.
A leak appearing within an analytic region (a rule added to the camera) is immediately analyzed for its attributes, including thermal temperature, size, and behaviour (e.g. spraying, pooling, spilling). When a leak is determined to be valid based on set parameters, an alarm notification with leak video is generated and sent to a monitoring station.
Bipolar generators were universal prior to 1890 but in the years following it was replaced by the multipolar field magnets. Bipolar generators were then only made in very small sizes. [1] The stepping stone between these two major types was the consequent-pole bipolar generator, with two field coils arranged in a ring around the stator.
LBL – long baseline (acoustics) LC – locked closed; LCM – lost circulation material; LCNLG – LDT CNL gamma ray log; LCR – local control room; LCV – level control valve; L/D – lay down (such as tubing or rods) LD – lay down (such as tubing or rods) LDAR – leak detection and repair; LDHI – low-dosage hydrate inhibitor; LDL ...
A 3-way valve has 3 ports; it connects one port to either of the two other ports (typically a supply port and an exhaust port). The solenoid valve (small black box at the top of the photo) with input air line (small green tube) used to actuate a larger rack and pinion actuator (gray box) which controls the water pipe valve
Critical field resistance is a term that is associated with a shunt DC generator. In a DC shunt generator, the voltage induced across the armature, V a, is directly proportional to the flux acting across it, The flux in a DC generator is directly proportional to the field current, I f. The critical field resistance is defined as the maximum ...
Core plugs can often be a source of leaks due to corrosion caused by cooling system water. [4] Although modern antifreeze chemicals do not evaporate and may be considered "permanent", anti-corrosion additives gradually deplete and must be replenished via a flush and refill. Automotive manufacturers specify time and mileage numbers for cooling ...
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