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The mold may be part of the finished article and may provide shielding or heat dissipating functions in addition to acting as a mold. When the mold is removed the potted assembly is described as cast. [4] As an alternative, many circuit board assembly houses coat assemblies with a layer of transparent conformal coating rather than potting. [5]
An amorphous metal transformer (AMT) is a type of energy efficient transformer found on electric grids. [1] The magnetic core of this transformer is made with a ferromagnetic amorphous metal . The typical material ( Metglas ) is an alloy of iron with boron , silicon , and phosphorus in the form of thin (e.g. 25 μm) foils rapidly cooled from melt.
A current transformer (CT) is a type of transformer that is used to measure alternating current (AC). TELK started manufacture of current transformers from 1968 in collaboration with Hitachi Ltd. These transformers are hermetically sealed, oil impregnated, paper insulated and oil filled outdoor type current transformers up to 400 kV.
Toroidal inductors and transformers are inductors and transformers which use magnetic cores with a toroidal (ring or donut) shape. They are passive electronic components , consisting of a circular ring or donut shaped magnetic core of ferromagnetic material such as laminated iron , iron powder, or ferrite , around which wire is wound.
In the case of a busbar, the conductor terminals will support the busbar in its location. In the case of a bushing, a fixing device will also be attached to the insulation to hold it in its location. Usually, the fixing point is integral or surrounds the insulation over part of the insulated surface.
To reduce noise, enclosures are often built around the transformer and can also be added after the substation is built. [51] Oil-based transformers are often built with bunded areas to prevent the escape of flaming or leaking oil. Fire separation areas or firewalls are built around the transformer to stop the spread of fire. [52]