Circuit configuration for monitoring and/or regulating supply voltages

US7113375B2 · kind B2 · utility

Assignee

• ENDRESS+HAUSER GMBH+CO.KG · DE

Inventors

• Bernd Strütt · Steinen, DE
• Edwin Steinebrunner · Todtnau, DE

Key dates

• Filing date: Oct 4, 2001
• Grant date: Sep 26, 2006
• Expiry date: Dec 8, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02H9/041
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A circuit configuration for monitoring and/or for regulating supply voltages. The circuit enables at least two supply voltages (U12) or (U22) that are produced by means of two feed-ins (Q1, Q2) and that are provided for consumer circuits (V1, V2) to be monitored and limited simultaneously. To this end, the circuit configuration comprises a corresponding voltage monitoring electronics unit which detects the supply voltages (U12, U22) and compares them with associated tolerance values (ΔU12, ΔU22). The voltage monitoring electronics unit also provides a control signal (y) which signals whether the first supply voltage (U12) is lower than the associated tolerance value (ΔU12). The control signal (y) is used to control a shunt electronics unit through which a shunt current (IS) passes temporarily. Said shunt current (IS) is fed by feed-in (Q1) and by feed-in (Q2) and passes through the shunt electronics unit at least when the control signal (y) signals that at least the supply voltage (U12) is greater than the associated tolerance value (ΔU12).