Frictional , rotating losses are not common to Transformers and rotating machines. these are specific to rotating machines.
The transformer you describe is being used as a step-down transformer, and is classified as an electrical machine. The transformer could either be a mutual transformer, consisting of two, electrically-isolated coils, or an auto-transformer which uses a common coil between its primary and secondary circuits.
It depends on the design of the transformer but 1 MVA is a common size for an 11 kV / 415 v three-phase transformer.
Neither of these terms is normally applied to a transformer. You may be thinking of a 'mutual tranformer' and an 'autotransformer'. If so, then a 'mutual transformer' is a transformer which has electrically-isolated primary and secondary windings, whereas an 'autotranformer' (the term, 'auto', is misleading and has nothing to do with the transformer being 'automatic'!) has a common and series winding, meaning that the primary and secondary sides are electrically connected to each other.
In the context of a low voltage transformer, "common" typically refers to a shared or reference point in the electrical circuit, often associated with the neutral or ground connection. This common point allows multiple circuits to share a common return path, ensuring proper operation and safety. It can also be used to describe a specific terminal on the transformer that serves as a return path for multiple output voltages.
They all have a rotating commutator in the centre and a coil surrounding it.
These terms appear in the calculation of fault currents. Common sources of fault currents are rotating machines, i.e., motors and generators.
Some common household appliances that use friction include vacuum cleaners (friction between the rotating brush and the floor), blenders (friction between the blades and the contents being blended), and washing machines (friction between the clothes and the agitator or drum).
A commutator is an electrical switch that periodically reverses the current direction in an electric motor or electrical generator. A commutator is a common feature of direct current rotating machines.
The transformer you describe is being used as a step-down transformer, and is classified as an electrical machine. The transformer could either be a mutual transformer, consisting of two, electrically-isolated coils, or an auto-transformer which uses a common coil between its primary and secondary circuits.
An auto transformer has one winding with the output being tapped at some point and therefore has no isolation between primary and secondary. This may make it unsafe or illegal in some applications. A common power transformer has separate windings.
a step down transformer is used to lower the voltage from the powerlines into your home. a common slang term for this type of transformer is a pole pig.
It depends on the design of the transformer but 1 MVA is a common size for an 11 kV / 415 v three-phase transformer.
Common bad transformer symptoms in HVAC systems include frequent system cycling, blown fuses, inconsistent heating or cooling, and a humming or buzzing noise coming from the transformer. These issues can indicate a malfunctioning transformer that may need to be replaced.
Some common questions about simple machines include: How do simple machines make work easier? What are the different types of simple machines? How do simple machines affect force and distance in work? How can simple machines be combined to create complex machines?
Group III machines
Transformer utilization factor is the ration of power delivered to the load and ac rating of the transformer secondary.
If question is about a transformer's tapped coil then the taps are a way of getting different voltages from one transformer. The end of the transformer's coil is the common point and the taps to this common point will give different voltages depending on where in the coil the taps are taken from.