{
  "$type": "site.standard.document",
  "description": "The invention relates to a monitoring protection circuit for lighting systems, which comprises a lighting unit, a power supply, and a measuring device measuring electrical quantities, as well as a method which uses the monitoring protection circuit. The object of providing a monitoring protection…",
  "path": "/patents/950386",
  "publishedAt": "2015-06-10T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60Q11/005",
    "CONTRONIX GMBH [DE]"
  ],
  "textContent": "The invention relates to a monitoring protection circuit for lighting systems, which comprises a lighting unit, a power supply, and a measuring device measuring electrical quantities, as well as a method which uses the monitoring protection circuit. The object of providing a monitoring protection circuit which is suitable for detecting fault resistances in the lighting system is solved in that a monitoring protection circuit, which comprises a load switch switching the lighting unit on and off and a current and/or voltage limiting component, is used such that upon coincidence of the measured voltage U L across the lighting unit with the expected voltage U Soll or of the measured current I L through the measurement path with the expected current I Soll from the target current-voltage characteristic curve of the lighting unit, the lighting unit is switched on, and upon a definable deviation of the voltage U L across the lighting unit from the expected voltage U Soll or of the current I L from the expected current I Soll from the target current-voltage characteristic curve of the lighting unit, the lighting unit is switched off immediately.",
  "title": "Monitoring protection circuit for lighting installations"
}