VOLTAGE LIMITER FOR LIGHTING NETWORKS Russian patent published in 2004 - IPC

FIELD: conversion equipment. SUBSTANCE: voltage limiter for lighting networks is designed to keep specified setting of effective voltage in industrial lighting networks. It can also be used to adjust heating devices containing two power thyristors connected in parallel opposition which control junctions are shunted by back-biased diodes. Rectifier bridge is connected to control electrodes through limiting resistor. Integrating link comprising resistor and capacitor connected in series and simple, economic and reliable control device is connected to output of rectifier bridge. Auxiliary thyristor is connected in parallel to integrating link to limit voltage of lighting networks at specified level, its control electrode is connected to common point of connection of resistor and capacitor of integrating link through switching diode and resistor connected in series. Another capacitor is connected in parallel to capacitor of integrating link through collectoremitter junction of optotransistor shunted by back-biased diode. Control light-emitting diode of optotransistor connected in series with stabilizer diode is connected to voltage divider shunted by capacitor. Voltage divider is connected trough another rectifier bridge and additional resistor of load voltage. EFFECT: simplifier design of voltage limiter. 3 dwg