Intelligent air switch controller

Abstract

The invention provides an air switch controller externally connected to a leading-out terminal of a traditional air switch. According to the air switch controller, the structure of an original air switch and layout and wiring of an original electric control cabinet are not changed, the air switch controller can be directly installed on a wire outlet terminal of a controlled air switch, and an adjusting mechanism is arranged in the air switch controller, so that the air switch controller can be matched with air switches of different manufacturers; the air switch controller is internally provided with a motor screw device and a drive circuit thereof, can push an external mechanical structure to control an air switch handle to act, and achieves the purpose of controlling opening and closing of the air switch; the air switch controller is internally provided with a non-polar two-wire system energy-carrying communication bus, data communication and equipment power supply functions can be completed at the same time, and the built-in current transformer can detect the magnitude of current on a connected load line; and the air switch controller is further internally provided with a thermistor and a sampling circuit thereof, and can detect the temperature of an outgoing line terminal of the air switch, namely the connected load line.

Description

technical field [0001] The invention relates to the field of intelligent control, in particular to an intelligent air switch controller for remotely controlling an air switch. Background technique [0002] Air switch, also known as air circuit breaker, is a kind of circuit breaker. As long as the current in the circuit exceeds the rated current, it will automatically disconnect. Air switch is a very important electrical appliance in low-voltage power distribution network and electric drive system. Integrates control and multiple protection functions in one. For the traditional air switch, the opening and closing of the air switch requires manual operation. For example, when repairing the circuit or stopping the work of the equipment in the circuit, it is necessary to manually toggle the manual operating lever of the air switch for controlling tripping and closing, so that the air switch completes the opening action; when the repair is completed or it is necessary to start a...

AI Technical Summary

Problems solved by technology

[0003] The traditional air switch has the following disadvantages: (1) Closing needs to be done manually on site by manually turning the handle, and there is a response time delay for personnel to go to the site, which is very inconvenient for maintenance occasions and unmanned and few-person control occasions ;(2) The operation of the traditional air switch requires the staff to have a certain basic knowledge of electricity, and the environment of the control cabinet creates hidden dangers to the safety of the general staff; (3) The opening of the traditional air switch is after the opening condition is reached For the production plant area with high requirements for power protection, sudden power failure will cause certain economic losses

[0004] In order to solve the above disadvantages of traditional air switches, intelligent air switch controllers have appeared on the market. The existing intelligent air switch controllers have the following problems: (1) Most of the air switch controllers need to remove the original air switch Afterwards, it is a replacement installation with high cost. In order to realize the automatic opening and closing function, the transmission control mechanism is complicated and the width needs to be increased. 1P must be widened to at least 2P, and the original air switch needs to be replaced. Layout; (2) Add the air switch controller to the original air switch, but it needs to increase the width and change the original wiring of the control cabinet, the installation is more cumbersome, and the installed air switch controller often only has automatic opening (3) Air switch controllers generally have data communication functions. The existing air switches with controls on the market require a large current to drive the motor to control, so in addition to communication power, additional power is required.

Among them, because of the inevitable power conversion part that takes power directly from the line, the overall structure is larger and the circuit consumption is higher; the external power supply adds two power supply lines outside the communication wiring, and the sequence of the four lines cannot be confused. , on the one hand, it increases the amount of wiring, on the other hand, it increases the difficulty of wiring

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