CN204462331U - Vacuum breaker mechanical features on-line monitoring system - Google Patents

Abstract

The utility model discloses an online monitoring system for the mechanical characteristics of a vacuum circuit breaker, which comprises a control module, a signal conditioning circuit, a first current monitoring module for obtaining the current signal of the opening and closing coil of the circuit breaker, and a first current monitoring module for obtaining the current of the energy storage motor. The second current monitoring module for the signal, the third current monitoring module for obtaining the current signal of the chassis car motor, the travel monitoring module for obtaining the circuit breaker contact travel signal and the tension monitoring module for obtaining the circuit breaker spring tension signal, The output of each monitoring module is connected to the input of the signal conditioning circuit, and the output of the signal conditioning circuit is connected to the control module, and the control module processes and judges whether the circuit breaker has occurred according to the obtained current signals, contact travel signals and tension signals. It has the following advantages: high degree of intelligence, accurate monitoring, and online monitoring of mechanical characteristics of multiple circuit breakers at the same time.

Description

On-line Monitoring System for Mechanical Characteristics of Vacuum Circuit Breakers

technical field

The utility model relates to an online monitoring system for mechanical characteristics of a vacuum circuit breaker.

Background technique

At present, both at home and abroad are devoting themselves to the research and development of circuit breaker detection methods. Circuit breaker on-line monitoring technology has entered a new stage of development, and some new theories, technologies, and detection methods are being developed and applied. Obviously, detection methods have always been the core work of online monitoring technology. For the on-line monitoring of circuit breakers, no matter domestic or foreign, there is no general online monitoring device standard product, and each research institution or manufacturer produces different products according to different circuit breaker devices and user requirements. In recent years, some domestic units and manufacturers are also carrying out work on circuit breaker on-line monitoring and fault diagnosis. However, the function of the circuit breaker on-line monitoring system still needs to be further improved and improved. After several years of operation, some design problems of the monitoring system have been exposed. It is necessary to combine the characteristics of online monitoring from a technical point of view to further improve the stability and accuracy of the product and ensure the quality of the sensor itself and the reliability of on-site measurement. In order to get better results.

The traditional on-line monitoring device for mechanical characteristics of vacuum circuit breakers is composed of thyristor DC power supply tachometer control circuit, gate control circuit, timing and synchronous lights, etc., which has disadvantages such as poor intelligence, large errors and imperfections. , and only monitoring one or several mechanical characteristics of the circuit breaker cannot meet the market demand at all, so the early on-line monitoring method is not ideal.

Utility model content

The utility model provides an online monitoring system for mechanical characteristics of a vacuum circuit breaker, which overcomes the shortcomings of the prior art described in the background art.

The technical scheme that the utility model solves its technical problem adopts is:

An online monitoring system for the mechanical characteristics of a vacuum circuit breaker, which includes a control module, a signal conditioning circuit, a first current monitoring module for obtaining the current signal of the opening and closing coil of the circuit breaker, and a second current monitoring module for obtaining the current signal of the energy storage motor , the third current monitoring module for obtaining the current signal of the chassis car motor, the travel monitoring module for obtaining the contact travel signal of the circuit breaker, and the tension monitoring module for obtaining the spring tension signal of the circuit breaker, the first current monitoring module, The output of the second current monitoring module, the third current monitoring module, the stroke monitoring module and the tension monitoring module are connected to the input of the signal conditioning circuit, and the output of the signal conditioning circuit is connected to the control module, and the control module is based on the obtained current signals, The contact travel signal and tension signal are processed and judged whether the circuit breaker is faulty.

In one embodiment: the first current monitoring module, the second current monitoring module, and the third current monitoring module all use Hall current sensors, the stroke monitoring module uses angular displacement sensors, and the tension monitoring module uses tension sensors.

In an embodiment: the control module includes a processor, an A/D sampling unit, a memory and a clock unit, and the A/D sampling unit, the memory and the clock unit are all connected to the processor.

In one embodiment: the control module further includes an audible and visual alarm unit connected to the processor.

In an embodiment: the control module further includes a liquid crystal display unit connected to the processor.

In an embodiment: the control module further includes an RS485 communication unit connected to the processor.

Compared with the background technology, this technical solution has the following advantages:

1. It adopts advanced sensor technology, signal processing technology, and signal communication technology. It has a higher level of intelligence, and the error of online monitoring is smaller. , contact stroke and spring tension detection, to realize the comprehensive monitoring of circuit breaker closing and opening speed, closing and opening time, overtravel, spring fatigue and other characteristics.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 depicts a system diagram of an online monitoring system for mechanical characteristics of a vacuum circuit breaker according to the present invention.

Detailed ways

Please refer to Fig. 1, the online monitoring system for vacuum circuit breaker mechanical characteristics, which includes a control module 10, a signal conditioning circuit 20, a first current monitoring module 30 for obtaining the current signal of the opening and closing coil of the circuit breaker, and a first current monitoring module 30 for obtaining the current signal of the energy storage motor The second current monitoring module 40 for current signals, the third current monitoring module 50 for obtaining chassis motor current signals, the travel monitoring module 60 for obtaining circuit breaker contact travel signals and the circuit breaker spring tension signal for obtaining Pull monitoring module 70, the output of the first current monitoring module 30, the second current monitoring module 40, the third current monitoring module 50, the stroke monitoring module 60 and the pulling force monitoring module 70 are connected to the input of the signal conditioning circuit 20, the signal conditioning The output of the circuit 20 is connected to the control module 10, and the control module 10 processes and judges whether the circuit breaker is faulty or not according to the obtained current signals, contact stroke signals and tension signals.

In this embodiment, the first current monitoring module 30, the second current monitoring module 40, and the third current monitoring module 50 all use Hall current sensors, the stroke monitoring module 60 uses an angular displacement sensor, and the tension monitoring module 70 uses a tension sensor. sensor.

This control module 10 comprises processor 11, A/D sampling unit 12, memory 13, clock unit 14, sound and light alarm unit 15, liquid crystal display unit 16 and RS485 unit 17, this A/D sampling unit 12, memory 13, clock The unit 14, the sound and light alarm unit 15, the liquid crystal display unit 16 and the RS485 unit 17 are all connected to the processor 11.

The utility model obtains relevant signals of the circuit breaker through the first, second and third current sensors, angular displacement sensors and tension sensors, and after being processed by the signal conditioning circuit 20, the A/D sampling unit 12 of the control module 10 collects and sends To the processor 11, the processor 11 in turn sends it to the memory 13 for storage. The memory 13 can store the state parameter monitoring data for at least half a year, and the processor 11 judges the coil turn by the current signal of the opening and closing coil obtained by the first current sensor. Whether there is a short circuit or a coil stuck between the two current sensors, the motor current signal obtained by the second current sensor and the third current sensor can be used to judge whether the motor is blocked or the motor is short-circuited, and the travel signal obtained by the angular displacement sensor can be used to judge whether the motor is locked. Whether the circuit breaker mechanism is stuck, the contact overtravel, and the opening and closing speed of the circuit breaker are detected, and the tension signal obtained by the spring tension is used to detect the fatigue degree of the spring. The specific judgment and detection method of the processor is as follows: recall the historical data of each state parameter of the circuit breaker stored in the memory 13 (opening and closing coil current, energy storage motor current, chassis motor current, contact stroke, pulling force, etc. Historical data) and the test data pre-stored in the memory in advance, compare the stored historical data curve, test data curve and the measured state parameter data, and finally evaluate and diagnose the current performance of the circuit breaker, and compare the diagnostic results and related The curve is displayed on the liquid crystal display unit 16, and if the diagnosis finds that the circuit breaker fails, the audible and visual alarm unit will be activated to prompt the operator to overhaul. In this embodiment, the communication connection between the control module 10 and the host computer can also be realized through the RS485 communication unit 17, and relevant data can be uploaded to the host computer.

The above is only a preferred embodiment of the utility model, so the scope of implementation of the utility model cannot be limited accordingly, that is, the equivalent changes and modifications made according to the patent scope of the utility model and the contents of the specification should still belong to this utility model. within the scope of utility models.

Claims (6)

1. The online monitoring system for the mechanical characteristics of vacuum circuit breakers is characterized in that it includes a control module, a signal conditioning circuit, a first current monitoring module for obtaining the current signal of the opening and closing coil of the circuit breaker, and a first current monitoring module for obtaining the current signal of the energy storage motor The second current monitoring module, the third current monitoring module for obtaining the current signal of the chassis motor, the travel monitoring module for obtaining the contact stroke signal of the circuit breaker, and the tension monitoring module for obtaining the spring tension signal of the circuit breaker, the first The outputs of the first current monitoring module, the second current monitoring module, the third current monitoring module, the stroke monitoring module and the tension monitoring module are connected to the input of the signal conditioning circuit, the output of the signal conditioning circuit is connected to the control module, and the control module is obtained according to Each current signal, contact stroke signal and tension signal are processed and judged whether the circuit breaker is faulty or not. 2. The online monitoring system for vacuum circuit breaker mechanical characteristics according to claim 1, characterized in that: the first current monitoring module, the second current monitoring module, and the third current monitoring module all use Hall current sensors, and the stroke monitoring The module adopts an angular displacement sensor, and the tension monitoring module adopts a tension sensor. 3. The online monitoring system for vacuum circuit breaker mechanical characteristics according to claim 1, characterized in that: the control module includes a processor, an A/D sampling unit, a memory and a clock unit, and the A/D sampling unit, memory and clock units are connected to the processor. 4. The online monitoring system for mechanical characteristics of vacuum circuit breakers according to claim 3, wherein the control module further includes an audible and visual alarm unit connected to the processor. 5. The online monitoring system for mechanical characteristics of vacuum circuit breakers according to claim 3, wherein the control module further includes a liquid crystal display unit connected to the processor. 6. The online monitoring system for mechanical characteristics of vacuum circuit breakers according to claim 3, wherein the control module further includes an RS485 communication unit connected to the processor.