A fast-response and reliable equipment protective earth continuity monitor

Abstract

The invention discloses a quick-response and reliable equipment protection grounding continuity monitor, which includes a high-voltage isolation safety protection component, a power waveform sampling component, an analog-to-digital signal electrical form conversion component, a real-time monitoring module for ground wire connection status, and a ground Output component for wire connection status reports. The monitor of the invention can be applied to the existing equipment simply and quickly, adopts cheap and reliable conventional electronic components, and reduces the cost. The monitor of the present invention can make a fast and accurate judgment on the connection state of the safety protection ground wire PE within 10 milliseconds at the fastest during the working process, and the main control equipment wins when the connection status of the safety protection ground wire PE fails. Sufficient processing time protects the safety of related equipment and operators, and avoids major property losses and personal injuries.

Description

technical field [0001] The invention relates to a ground wire connection state monitor, in particular to a quick-response and reliable equipment protection grounding continuity monitor, which belongs to the technical field of new energy vehicles. Background technique [0002] The charger is a device used to charge new energy electric vehicles. In order to regulate the electrical connection between charging equipment and new energy electric vehicles, and for users to operate charging equipment safely and reliably, the state has formulated relevant standards for this purpose. In the currently implemented standard "GB / T 18487.1-2015 Electric Vehicle Conductive Charging System Part 1: General Requirements", in describing the connection modes 2, 3, and 4 between charging equipment and new energy electric vehicles, grounding is required The electrical continuity of the protection is continuously monitored. Upon detection of a loss of protective ground connection, the charging de...

AI Technical Summary

Problems solved by technology

However, the grace period has expired. In the newly released and effective national standard "GB / T 34657.1-2017 Electric Vehicle Conductive Charging Interoperability Test Specification Part 1: Power Supply Equipment", the detection of this function is replaced by the previous non-mandatory It has become an item that must be tested mandatory in the future, which means that charging equipment that does not have this function or that the function is not working well will not be allowed to be sold in the market, and companies that fail to solve this problem in time will face a life-and-death situation.

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