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Questions and Answers List

level questions: Level 1

Question	Answer
is a electrical device that converts voltage from either high to low or low to high voltage. works only on alternating current system.	transfomer
side of a transformer is also known as the source side. the voltage of the __ side will be less then the voltage of the secondary side if the transformer is stepping the voltage up. Inversely, the voltage of the ___ side will be more than the voltage of the secondary side if the transformer is stepping the voltage down.	primary
also known as the load side	secondary
the primary bushing of an overhead distribution transformer are labeled __ and __. the __ is always on the left if facing the transformer	h1 and h2 bushing
the secondary bushing of an overhead distribution transformer are labeled __, __ and __. the __ is the neutral bushing	x1,x2 and x3
stands for kilo volt amperes and is the wattage rating of the transformer. the rating of a transformer us usually stenciled on the front of the transformer. a transformer with a 15 stenciled on the front would be rated for 15,000 watts	KVA
is an overhead transformer that needs an external protective device for protection (cutout switch). the lighting arrestor is typically located with the switch. does not have any internal protection	conventional transformer
have internal primary fuse and internal secondary breakers. when installed it does not need to attach to a cutout switch. the lighting arrestor is attach to the tank of the transformer.	csp transformer
provides path for a magnetic coupling of the transformer windings. without the core, a transformer would be very inefficient. the core gives the tansformer the bulk of it weight.	transformer core
in a transformer occurs with the insulating oil. as the oil heats near the core, it rises and is forced to the outside against the tank where is cools. as it cools it falls to the bottom of the tank. this continuous circulation caused by heat is called ____ and is how transformers are cooled	convection
wasa a part if the insulating fluid in tsansformers in the past. its harmful to the environment and prohibits in new transformer.	pcbs
is the energized of a coil of wire by placing it near a coil that is energized with AC current. its the basic principle that allows the transformer to work.	induction
is a comparison of the number of turns of wire in each coil. it can be calculated by dividing the primary voltage rating of transformer by the secondary voltage rating .	turns ratio
when the three coils are each connected phase to phase, the the three phases are connected in series. This connection is known as ___ connection.	Delta
refers to the transformer of a delta or open delta secondary that serves the majority of the single phase, this transformer is usually sized larger than the other transformer in the bank and always has a neutral connected to the x2	lighter transformer
refers to those transformer banks composed of only two transformer. the vectorial diagrams of these banks lack a third vector giving the appearance of a broken.	open banks