equalizer circuit

An electrical circuit that ensures that when two or more generators are connected in parallel to a power system they share the load equally. In this arrangement, if the voltage of one generator is slightly higher than that of the other generator in parallel, that generator will assume the greater part of the load. Such a circuit includes an equalizing coil wound with a voltage coil in each of the regulators, an equalizing bus to which all equalizing circuits are connected, and a low-resistance shunt in the ground lead of each generator. The equalizing coil will either strengthen or weaken the effect of the voltage coil, depending upon the direction. The low-resistance shunt in the ground lead of each generator causes a difference of potential between the negative terminals of the generators. The value of the shunt ensures a potential difference of 0.5 volt across it at the maximum generator load.

Aviation dictionary. 2014.

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