DC 240/336v main control device

Abstract

The present invention discloses a direct current 240 / 336V master control device. Two output ends of a resistor switching circuit are respectively connected with two input ends of a voltage conversion circuit, the other two input ends of the voltage conversion circuit collect the voltage of a dual-way bus, two input ends of the resistor switching circuit are connected with the dual-way bus, the output signals of the voltage switching circuit are transmitted to a single-chip microcomputer through a first A / D analog-to-digital converter and an optoelectronic coupler in order, a power supply supplies direct current power supply for the single-chip microcomputer, the signals collected by a current sensor and a leak current sensor are transmitted to the single-chip microcomputer through a second A / D analog-to-digital converter, a memory is connected with the single-chip microcomputer, the input end of an output relay is connected with the output end of the single-chip microcomputer, and a communication circuit is in bidirectional communication connection with the single-chip microcomputer. The cost is reduced, and the insulation supervision performance is improved.

Description

Technical field [0001] The present invention relates to the field of direct current power supplies, in particular to a direct current 240 / 336V main control device. Background technique [0002] At present, with the vigorous development of high-voltage DC power supply systems in my country's communications industry, the demand for high-voltage DC distribution monitoring products is increasing, and the requirements for performance and functions are also getting higher and higher. However, most of these products on the market use traditional voltage sensors for voltage acquisition, and insulation monitoring uses leakage current detection methods. This makes the above functions easy to implement, but increases the cost, reduces the product cost performance, and cannot fully monitor the system. Insulation situation. Summary of the invention [0003] The purpose of the present invention is to provide a DC 240 / 336V main control device in view of the above problems, so as to reduce the c...

AI Technical Summary

Problems solved by technology

However, most of these products on the market use traditional voltage sensors for voltage collection, and leakage current detection is often used for insulation monitoring, which makes the above functions easy to realize, but increases costs, reduces product cost performance, and cannot fully monitor the system. Insulation

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