Water resistor anti-speed protection circuit

In order to prevent overrun accidents of small generators , water resistor energy dissipation measures can be used to transfer the energy of the unit before sudden load shedding
to the water resistor, thereby stabilizing and suppressing the rotation speed. The anti-flying protection circuit
    using water resistors is shown in Figure 7-13.     When load shedding or other accidents occur in the generator, the circuit breaker QF trips (generally generators are equipped with over-current and over -voltage protection devices), its normally open auxiliary contact closes, the contactor KM is electrically closed, and its main The contact is connected to the water resistor . At the same time, the electric bell HA will sound an alarm, and the person on duty can slowly shut down the machine.