LOSS OF GROUND DETECTION SYSTEM

• Main Authors: AGUSTI-BATLLE, JORDI, NAVARRO-CASES, VICTOR, RUIZ-GARCIA, DANIEL, MARTINEZ-RAMIREZ, ALBERTO, BENET-FREISSINIER, JOSEP, ALQUEZAR-ALQUEZAR, SERGIO
• Format: Patent
• Language: English
• Published: 02.01.2020
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

A loss of ground detection system includes a reference voltage source that provides a reference voltage, a primary ground connection that is adapted to be connected to a primary ground, a secondary ground connection that is adapted to be connected to a secondary ground, and an internal ground. The system also includes a combined ground integrity monitoring unit that outputs a multistage signal to control electronics. The multistage signal includes a first and a second output voltage. A first switch is interposed between the primary ground connection and the internal ground such that the first switch opens in response to loss of connection to the primary ground as indicated by a change of status in multistage signal, a diode system is interposed between the secondary ground connection and the internal ground, the diode system oriented to allow flow from the internal ground to secondary ground connection under forward bias.