PROTECTION DEVICE FOR SUPPLYING CONVERTER UNIT OF AUXILIARY SERVICE AT SUBWAY FRAMES

摘要

The invention refers to a protection device for the auxiliary services supply converter unit in subway trains, consisting of a control assembly for the supply voltage and a relay with auxiliary contacts that conditions the supply voltage of the converter. Outside the normal range of the voltage, the disconnecting of the converter is ensured by a gauge using a timer stage (a capacitor and a simple gauge) that controls a final transistor having its command relay inside the collector.