Electric transformers are inductively coupled electro-magnetic devices that transfer electrical energy from one circuit to another. All electronically operated equipment depends on power transformers to convert electrical currents into voltages that fit a specific application, and current transformers are also required in order to store and transport energy through power lines and grids.
Because there are so many contexts in which electronic transformation is necessary, there exist a wide variety of electric transformers to accommodate them. Auto transformers, step up and step down transformers, toroidal transformers, zig zag transformers and pulse transformers are just a few examples. By transferring electrical energy through two coil stages, transformers can increase, decrease, isolate, translate and pattern electrical currents to safely power electronic equipment of all voltage requirements. Electric transformer manufacturers configure transformers differently to meet all types of electric transformation applications and range in size from thumb-sized transformers in electric lamps or microphones to the enormous stationary transformers in power facilities. Low voltage transformers convert electrical currents into voltages that fit appliances such as dimmer lights and other small electronic devices, while high voltage transformers are used in the transmission of electricity between power generation facilities and its points of consumption. Most transformers are isolation transformers because they facilitate the transmission of electricity through induction, and many transformers are 3 phase transformers, capable of transforming electricity in 3 phases.
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Electric Transformer Terms
- A transformer that uses air to cool by use of fans or normal ventilation.
- A transformer with one winding per phase.
- Describes multiple single phase transformers connected together to provide power to a three phase load.
central part or inductor that enhances the power of the magnetic field.
- In a three phase connection the windings all connect to form a loop.
of time for a transformer to provide full rated power to the load. This
measurement greatly affects the actual size of the transformer.
Encapsulated - A dry transformer with an enclosed core and coil assembly.
amount of current a transformer draws at nominal voltage input in an
- A conductor that can handle thermal expansion and contraction as well as reduce noise.
the forces that resist the flow of current in AC circuits like resistance
or inductive or capacitive reactance.
- Kilovolt Ampere rating that is a measurement of the output of a transformer without exceeding a certain temperature.
- The quantity of
electric power supplied or necessitated at any particular spot in the
system. Also a requirement of the KVA or
VA from the transformer; light bulbs are loads.
- The direction of the current between two leads. If the directions are the same, the leads have the same polarity. In electric transformers the polarity is classified as either additive or subtractive.
divided by volt amps, KW divided by KVA - the leading and lagging
of voltage versus current caused by inductive or capacitive
loads. Harmonic power factor relates to nonlinear current.
- On the load or output side, the connected transformer winding.
- Pressure switch device that detaches the transformer from the line.
- The measurement of the amount of force on a unit charge because of the surrounding charges.
- The change, in percentages, of the output voltage from no load
to full load.