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A synchro (also known as selsyn and by other brand names) is, in effect, a transformer whose primary-to-secondary coupling may be varied by physically changing the relative orientation of the two windings.
The first synchrotron to use the "racetrack" design with straight sections, a 300 MeV electron synchrotron at University of Michigan in 1949, designed by Dick Crane.. A synchrotron is a particular type of cyclic particle accelerator, descended from the cyclotron, in which the accelerating particle beam travels around a fixed closed-loop path.
In some power plants, a set of lamps may be connected between the generator and system busses (or between the instrument transformers connected to those busses) as a backup to the synchroscope instrument. The lamps flicker at the difference between system and generator frequency.
Sometimes as a precaution against out-of-step connection of a machine to a system, a "synchro check" relay is installed that prevents closing the generator circuit breaker unless the machine is within a few electrical degrees of being in-phase with the system. Synchro check relays are also applied in places where several sources of supply may ...
Transformer oil is flammable, so oil-filled transformers inside a building are installed in vaults to prevent spread of fire and smoke from a burning transformer. Some transformers were built to use fire-resistant PCBs , but because these compounds persist in the environment and have adverse effects on organisms, their use has been discontinued ...
A variable-frequency transformer is a doubly fed electric machine resembling a vertical shaft hydroelectric generator with a three-phase wound rotor, connected by slip rings to one external power circuit. The stator is connected to the other. With no applied torque, the shaft rotates due to the difference in frequency between the networks ...