Safe generation circuit of current to ground and intelligent device

• Main Authors: YANG JIAFA, JIN FUGEN
• Format: Patent
• Language: Chinese; English
• Published: 25.01.2022
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The invention provides a safe generation circuit for current to ground, and the circuit comprises a step-down current limiting element, a first control switch, a controller and a grounding end; the controller is connected with the control end of the first control switch and drives the first control switch to be switched on and switched off; the grounding end is connected with the ground; meanwhile, the circuit is additionally provided with a second control switch, a self-recovery fuse and a voltage sampling unit. The circuit is applied to an intelligent device, and the device is provided with a shell, an L-line terminal and an N-line terminal. And the L-line terminal, the N-line terminal and the grounding terminal are arranged on the shell. The circuit has the advantages that the use safety is fully considered, information transmission can be carried out by using the current signal generated by the circuit provided by the invention and directly using a power supply line of an existing low-voltage power grid,