CN2572546Y

CN2572546Y - Intelligent low voltage switch equipment

Info

Publication number: CN2572546Y
Application number: CN 02260332
Authority: CN
Inventors: 姜岳鑫; 徐瑞新; 彭雁
Original assignee: Shanghai China-science Electric (Group) Co Ltd
Current assignee: Shanghai China-science Electric (Group) Co Ltd
Priority date: 2002-09-27
Filing date: 2002-09-27
Publication date: 2003-09-10
Anticipated expiration: 2012-09-27

Abstract

The utility model relates to intelligent type low-voltage switch equipment, which mainly comprises a low-voltage circuit breaker, a current mutual inductor and a low-voltage motor. The utility model is also provided with a control module which can be used for controlling the low-voltage circuit breaker to be opened and closed and detecting the operating state of the low-voltage circuit breaker is connected with a coil of the low-voltage circuit breaker; a measuring module which can be used for collecting line voltage, the current of the current mutual inductor and the winding temperature of the low-voltage motor is connected with a voltage transformer, the current mutual inductor and the low-voltage motor; the control module and the measuring module are connected with a computer which can be used for processing the collected parameters, wherein, the computer can send out corresponding operating instructions. The utility model has the advantages that the utility model can realize the automatic protection, the automatic monitoring, the automatic control and the automatic diagnosis of faults of a first main equipment of a low-voltage electrical apparatus through the utilization of the control module, the measuring module and the powerful calculation function and the logic control function of the computer; the reliability and the safe operation of the power supply of the equipment can be ensured.

Description

The intelligent type low-voltage switchgear

Affiliated technical field

The utility model relates to a kind of low voltage switchgear, specifically refers to a kind ofly to realize protection to main equipment of low-voltage electrical apparatus, monitors, control, communication, have the intelligent type low-voltage switchgear of fault self-diagnosis function simultaneously.

Background technology

In the prior art; the low voltage switchgear that change distribution industry is generally used generally all uses protection, supervision, the control of discrete element realization to equipment; as adopt voltmeter, ammeter, indicator light etc. to monitor; adopt control operations such as button, change over switch, circuit breaker, adopt realization circuit protections such as fuse.These elements itself do not have diagnostic function usually, and an amount protection, control or function for monitoring break down, and will cause equipment breakdown, influence power supply and production; Simultaneously, this traditional equipment can't be realized computer management based on artificial local operation, implement very difficulty for comparatively complicated control logic, and this switch cubicle is to manufacturing industry with bringing great inconvenience per family.

Summary of the invention

The purpose of this utility model is: heavy current installation and microelectric technique, computer technology are combined, provide a kind of both reliable, effectively, strong, the economically viable intelligent type low-voltage switchgear of antijamming capability replaces traditional switchgear.

A kind of intelligent type low-voltage switchgear of the present utility model, mainly comprise low-voltage circuit breaker, current transformer, low-tension motor, it is characterized in that the control module that a may command low-voltage circuit breaker divide-shut brake is arranged and detect the low-voltage circuit breaker operating state is connected with described low-voltage circuit breaker coil, have one can gather line voltage distribution, the measurement module of current transformer electric current and low-tension motor winding temperature respectively with voltage transformer, current transformer, low-tension motor is connected, described control module, measurement module can link to each other to the computer that corresponding operating instruction was handled and sent to the parameter that collects with one.

The utility model has the advantages that: by powerful computing and the logic control function of utilizing control module, measurement module and computer; the utility model can be realized a main equipment of low-voltage electrical apparatus is protected automatically, monitors automatically, controlled automatically; automatic fault diagnosis can be guaranteed the reliable and security of operation of power supply of equipment.

Description of drawings

Now the utility model is described in further detail in conjunction with an embodiment

Fig. 1 is a block diagram of the present utility model;

Fig. 2 is the basic structure schematic diagram of the embodiment of Fig. 1.

Embodiment

Referring to Fig. 1, a kind of intelligent type low-voltage switchgear of the present utility model, mainly comprise low-voltage circuit breaker 1, current transformer 2, low-tension motor 6, other has the control module 3 of a may command low-voltage circuit breaker divide-shut brake and detection low-voltage circuit breaker operating state to be connected with the low-voltage circuit breaker coil, also have one can gather line voltage distribution, the measurement module 4 of current transformer electric current and low-tension motor winding temperature respectively with voltage transformer, current transformer, low-tension motor is connected, described control module 3, measurement module 4 can link to each other to the computer that corresponding operating instruction was handled and sent to the parameter that collects with one.

Referring to Fig. 2, in described control module 3, be provided with divide-shut brake relay 31, logic controller 32, microprocessor 33 and communication interface 34 at least, this control module links to each other 5 by communication interface 34 wherein with described computer, and links to each other with the divide-shut brake coil of low-voltage circuit breaker 1 by divide-shut brake relay 31 wherein.Computer 5 is sent to microprocessor 33 with control command by communication interface 34, and by logic controller 32, divide-shut brake relay 31, the divide-shut brake coil of controlling and driving low-voltage circuit breaker 1, realization is to the control of low-voltage circuit breaker 1, and control module 3 feeds back to computer 5 with the operating state of the low-voltage circuit breaker 1 that collects simultaneously.Because the high-performance, the high accuracy single-chip microcomputer that are provided with in the control module 3, therefore data wherein can show or revise at any time, can be used for comprising that across-the-line starting, reversible starting, the starting of star-triangle shape etc. drive the divide-shut brake control of low-voltage circuit breaker.

Equally by Fig. 2, in described measurement module 4, be provided with signal processor 41 at least, A/D converter 42, microprocessor 43 and communication interface 44, this measurement module 4 is connected with described computer 5 by communication interface 44 wherein, and be connected with various input signals respectively by the multichannel input port of its signal processor 41, as with 2 levels of current transformer of circuit, voltage transformer PT's is secondary, temperature sensor Rt in the low-tension motor 6 is connected, the voltage signal that obtains with the current signal that will obtain from current transformer 2 and voltage transformer PT is sent to computer 5 by measurement module 4, equally, the temperature sensor Rt that is located in the low-tension motor 6 links to each other with A/D converter 42 in the measurement module 4, is sent to computer with the temperature signal with low-tension motor 6 by measurement module 4.Computer 5 is composed various parametric data, and as the current/voltage rated value, every data such as alarming value, fault value, temperature value, positional value, force value, the cycle of operation are just computer can be realized protection, supervision, control and self-diagnostic function to equipment.When technical parameter with low-tension motor, alarm parameters, fault parameter input computer 5 as rated current, rated voltage rated frequency, rated power, rated speed, power factor, starting current, start mode, working temperature and setting, after computer 5 sends low-voltage circuit breaker 1 reclosing command, control module 3 is after receiving this instruction, by divide-shut brake relay 31 low-voltage circuit breaker 1 is closed a floodgate, low-tension motor 6 gets electric operation; Measurement module 4 after being converted to digital quantity, microprocessor 43 and handling of A/D converter, is input to the parameters that measures computer 5, and shows various operational factors and operating condition on screen.Cause overcurrent or overvoltage in case the phase failure or stall occur, exceeded the fault parameter of setting, measurement module 4 just is transferred to computer 5 with the operational factor that collects and confirms, send the instruction of the switch of cutting off the electricity supply then to control module 3 by

computer

5,3 switching windings that drive low-voltage circuit breaker 1 immediately of control module, make low-voltage circuit breaker 1 separating brake, more than these data will fully be stored in memory, and can show at any time or print.

Because control module 3 and measurement module 4 can be in time, the fault of judgment device emerged in operation apace, verily write down and show, the easy access personnel are the failure judgement point easily, both can control fault diffusion damage equipment, can guarantee the reliable and secure operation of electrical network again, realize that for realizing electric power system automation lays the first stone.

Claims

1. intelligent type low-voltage switchgear, mainly comprise low-voltage circuit breaker, current transformer, low-tension motor, it is characterized in that the control module that a may command low-voltage circuit breaker divide-shut brake is arranged and detect the low-voltage circuit breaker operating state is connected with the low-voltage circuit breaker coil, have one can gather line voltage distribution, the measurement module of current transformer electric current and low-tension motor winding temperature respectively with voltage transformer, current transformer, low-tension motor is connected, described control module, measurement module can link to each other to the computer that corresponding operating instruction was handled and sent to the parameter that collects with one.

2. intelligent type low-voltage switchgear according to claim 1, it is characterized in that in described control module, being provided with at least divide-shut brake relay, logic controller, microprocessor and communication interface, this control module links to each other with described computer by communication interface wherein, and links to each other with the divide-shut brake coil of low-voltage circuit breaker by divide-shut brake relay wherein.

3. intelligent type low-voltage switchgear according to claim 1, it is characterized in that in described measurement module, being provided with at least signal processor, A/D converter, microprocessor and communication interface, this measurement module links to each other with described computer by communication interface wherein, and be connected with various input signals respectively by the multichannel input port of its signal processor, be connected as the temperature sensor in secondary, the low-tension motor of, voltage transformer secondary with the instrument transformer of circuit.