DEVICE FOR PROTECTION OF SYNCHRONOUS GENERATOR AGAINST FAULT TO GROUND IN ONE POINT OF EXCITATION CIRCUIT

摘要

Purpose: The device is intended to protect the driving circuit from a ground fault (body) in one point of the chain drive powerful synchronous generators, motors, determining the insulation resistance and contact registration disorders brush shaft relay and static brushes. The essence of the invention is the measurement of current in the auxiliary power circuit voltage and the voltage in the transition resistance of the insulation, which allows to increase the accuracy of determining the magnitude of the coupling of the insulation is independent of the magnitude of the excitation circuit and the capacitance value of the voltage of the auxiliary voltage source. Introduction clock allows periodically discuss pulse counter, which increases the pre .stovernost abnormality detecting contact brush generator shaft, and the introduction gate AND permits to increase noise immunity fixing unit. 1 yl. from/