A circuit used in a multiengine generator system that causes the generators to share the electrical load equally. A low-resistance shunt, called an equalizing resistor, is installed between each generator and ground so all the current produced by the generator flows through it. The voltage drop across the equalizing resistors is sensed by the voltage regulators to control the output of the generators.

When one generator carries more than its share of the load, the voltage drop across its equalizing resistor is greater than that across the resistors of the other generators.

The voltage regulators sense this difference and decrease the voltage of the generator carrying the greater part of the load, and in this way force the other generators to carry their share.