CN207742526U - A kind of multifunctional microcomputer electric motor protective device - Google Patents
A kind of multifunctional microcomputer electric motor protective device Download PDFInfo
- Publication number
- CN207742526U CN207742526U CN201721825382.7U CN201721825382U CN207742526U CN 207742526 U CN207742526 U CN 207742526U CN 201721825382 U CN201721825382 U CN 201721825382U CN 207742526 U CN207742526 U CN 207742526U
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- module
- unit
- protective device
- electric motor
- protection
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- Control Of Ac Motors In General (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
The utility model is intended to open and provides a kind of multifunctional microcomputer electric motor protective device having a variety of the electrical parameter monitorings and defencive function such as long motor starting time, current quick, negative phase-sequence overcurrent, overheating protection, overvoltage, under-voltage protection, zero sequence overvoltage, zero-sequencedirectional protection and non-ionizing energy loss tripping.The utility model includes control module, power module and the data acquisition module being connected respectively with the control module and the power module, A/D analog-to-digital conversion modules, communication module, human-machine operation module; the control module includes control mainboard; central processing unit, secondary power supply module and the start-up circuit being connected respectively with the central processing unit and the secondary power supply module are provided in the control mainboard, the central processing unit includes CPU, data storage and the function and protecting unit being connected with the CPU.The utility model is suitable for middle-placed switch cabinet microcomputer electric motor protective device technical field.
Description
Technical field
The utility model is related to power system power supply and equipment protection fields more particularly to a kind of multifunctional microcomputer motor to protect
Protection unit.
Background technology
In electric system, the development of intelligent network distribution automation is maked rapid progress, as the unified secondary technological incorporation of power train is wanted
That asks is more and more urgent, and the requirement to power system power supply and equipment protection field is higher and higher, is required in middle-placed switch cabinet system
It is, current quick long with motor starting time, negative phase-sequence overcurrent, overheating protection, rotation-clogging protection, overload, overvoltage, low
Voltage protection, zero sequence overvoltage, zero-sequencedirectional protection and non-ionizing energy loss trip avoidance function will also have more electrical measurements, remote control, distant
The monitoring functions such as letter, this just needs the mating corresponding multifunctional microcomputer electric motor protective device of exploitation.
Utility model content
Technical problem to be solved in the utility model be overcome the deficiencies of the prior art and provide one kind can and middle-placed switch cabinet
The multifunctional microcomputer electric motor protective device of system support.
Technical solution used by the utility model is：The utility model includes control module, power module and difference
The data acquisition module that is connected with the control module and the power module, A/D analog-to-digital conversion modules, communication module, people
Machine operation module, the control module include control mainboard, and central processing unit, secondary power supply mould are provided in the control mainboard
Block and the start-up circuit being connected respectively with the central processing unit and the secondary power supply module, the central processing unit packet
Include CPU, data storage and the function and protecting unit being connected with the CPU, the function and protecting unit includes and institute
State function of measuring unit, observing and controlling functional unit, failure wave-recording functional unit, the Phase sequence detection list of central processing unit electric connection
Member, overheating protection unit, time clock feature unit, over-voltage over-current protection unit, the data acquisition module include being electrically connected to each other
Voltage/current mutual inductor and low-pass filter signal modulate circuit, the low-pass filter signal modulate circuit and the A/D moulds
Number conversion module electrical connection.
Further, the multifunctional microcomputer electric motor protective device is additionally provided with photoelectric isolating circuit and relay protector,
The photoelectric isolating circuit is electrically connected in the control mainboard and the relay protector, and the relay protector is electrical
It is connected to by protection motor.
Further, the data storage uses high-speed high capacity nonvolatile memory, the high-speed high capacity non-
Volatile memory can record 100 times or more historical events, and while powering off can automatically store information data.
The utility model has the beneficial effects that：Due to being provided with function of measuring unit, observing and controlling function list in the control module
Member, failure wave-recording functional unit, Phase sequence detection unit, overheating protection unit, time clock feature unit, over-voltage over-current protection unit etc.
Function and protecting unit, the utility model have long motor starting time, current quick, negative phase-sequence overcurrent, overheating protection, mistake
A variety of electrical parameter monitorings such as voltage, under-voltage protection, zero sequence overvoltage, zero-sequencedirectional protection and non-ionizing energy loss tripping and protection
Function, various defencive functions can freely throw move back by each function and protecting unit, and RS- is provided in communication module
485 communication bus interfaces, and open communications protocol is provided a user, facilitate and realizes SCADA functions, it can be achieved that more electricity are surveyed
The monitoring functions such as amount, remote control, remote signalling, improve the sensitivity of monitoring and control, enhance the use reliability of electrical equipment.
Description of the drawings
Fig. 1 is the principles of the present invention block schematic illustration.
Fig. 2 is the utility model central processing unit structural schematic diagram.
Fig. 3 is the utility model control mainboard structural schematic diagram.
Specific implementation mode
As shown in Figure 1, Figure 2, Figure 3 shows, the utility model include control module 1, power module 2 and respectively with the control
Data acquisition module 3 that module 1 is connected with the power module 2, A/D analog-to-digital conversion modules 4, communication module 5, human-machine operation
Module 6, the control module 1 include control mainboard 7, and central processing unit 8, secondary power supply mould are provided in the control mainboard 7
Block 9 and the start-up circuit 10 being connected respectively with the central processing unit 8 and the secondary power supply module 9, the centre
It includes CPU11, data storage 12 and the function and protecting unit 13 being connected with the CPU11, the function and protecting to manage device 8
Unit 13 includes that the function of measuring unit 131, observing and controlling functional unit 132, failure being electrically connected with the central processing unit 8 are recorded
Wave energy unit 133, Phase sequence detection unit 134, overheating protection unit 135, time clock feature unit 136, over-voltage over-current protection list
Member 137, the data acquisition module 3 include the voltage/current mutual inductor being electrically connected to each other and low-pass filter signal conditioning electricity
Road, the low-pass filter signal modulate circuit are electrically connected with the A/D analog-to-digital conversion modules 4
As shown in Figure 1, the multifunctional microcomputer electric motor protective device is additionally provided with photoelectric isolating circuit and relay protector,
The photoelectric isolating circuit is electrically connected in the control mainboard 7 and the relay protector, the relay protector electricity
Property is connected to by protection motor.
The data storage 12 uses high-speed high capacity nonvolatile memory, and the high-speed high capacity is non-volatile to be deposited
Reservoir can record 100 times or more historical events, and while powering off can automatically store information data.
In the present embodiment, there is communication module 5 remote control function, data can realize remote transmission, can pass through network
The required various data transmissions of user to monitoring center, centralized dispatching is carried out, data processing speed is accelerated, passes through
CPU11 can change Protection parameters at any time to monitoring data calculation processing, change defencive function, without debugging again, operation side
Just, the protection philosophy and process that the utility model has are as follows：
Start overlong time protection：When the maximum phase current of motor is started from scratch more than 10%Ie（Ie is that motor is specified
Electric current, similarly hereinafter）When, device starts timing, until electric current drops to 120%Ie, when being known as the startup of motor this period
Between Tstart.When Tstart is more than the motor start-up time adjusted between upon start up, protection act is in tripping.Motor start-up
After, the protection of motor start-up overlong time is exited.
Current quick：Current quick includes quick-break and quick-break after startup in starting.In starting process of motor
In, device detects three-phase current, and when there is electric current to be more than current ration in startup, device, which exports, after the delay that can be adjusted jumps
Protection signal lamp is lighted in lock order；After motor start-up, device detects three-phase current, electricity after having electric current to be more than startup
When flowing definite value, device exports trip signal after the delay that can be adjusted, and lights protection signal lamp.Protection can be in definite value menu
Middle selection puts into/exits, and electric current, time definite value can also adjust respectively.
Overcurrent protection：When motor three-phase current has larger asymmetry, it may appear that larger negative-sequence current, negative-sequence current will
The electric current for generating 2 times of power frequencies in the rotor makes the additional fever of rotor greatly increase, jeopardizes the safe operation of motor.Device is set
There is negative phase-sequence overcurrent protection, when negative-sequence current is more than negative-sequence current definite value, the device output tripping life after the delay that can be adjusted
It enables, lights protection signal lamp.Protection can select to put into/exit in definite value menu, and electric current, time definite value can also be whole respectively
It is fixed.
Overload protection：Device acquires three-phase current, compared with overload electric current definite value, when discovery electric current is more than definite value
When, device sends out alarm signal after the delay that can be adjusted.
The utility model is suitable for middle-placed switch cabinet microcomputer electric motor protective device technical field.
Claims (3)
1. a kind of multifunctional microcomputer electric motor protective device, it is characterised in that：It includes control module（1）, power module（2）And
Respectively with the control module（1）With the power module（2）The data acquisition module being connected（3）, A/D analog-to-digital conversion modules
（4）, communication module（5）, human-machine operation module（6）, the control module（1）Including control mainboard（7）, the control mainboard
（7）On be provided with central processing unit（8）, secondary power supply module（9）And respectively with the central processing unit（8）With the two level
Power module（9）The start-up circuit being connected（10）, the central processing unit（8）Including CPU（11）, data storage（12）With
And with the CPU（11）The function and protecting unit being connected（13）, the function and protecting unit（13）Including the equal and center
Processor（8）The function of measuring unit of electric connection（131）, observing and controlling functional unit（132）, failure wave-recording functional unit（133）、
Phase sequence detection unit（134）, overheating protection unit（135）, time clock feature unit（136）, over-voltage over-current protection unit（137）,
The data acquisition module（3）Including the voltage/current mutual inductor being electrically connected to each other and low-pass filter signal modulate circuit, institute
State low-pass filter signal modulate circuit and the A/D analog-to-digital conversion modules（4）Electrical connection.
2. a kind of multifunctional microcomputer electric motor protective device according to claim 1, it is characterised in that：The multifunctional microcomputer
Electric motor protective device is additionally provided with photoelectric isolating circuit and relay protector, and the photoelectric isolating circuit is electrically connected in institute
State control mainboard（7）With the relay protector, the relay protector is electrically connected at by protection motor.
3. a kind of multifunctional microcomputer electric motor protective device according to claim 1, it is characterised in that：The data storage
（12）Using high-speed high capacity nonvolatile memory, the high-speed high capacity nonvolatile memory can record 100 times or more
Historical events, and while powering off information data can be stored automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721825382.7U CN207742526U (en) | 2017-12-25 | 2017-12-25 | A kind of multifunctional microcomputer electric motor protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721825382.7U CN207742526U (en) | 2017-12-25 | 2017-12-25 | A kind of multifunctional microcomputer electric motor protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207742526U true CN207742526U (en) | 2018-08-17 |
Family
ID=63119311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721825382.7U Expired - Fee Related CN207742526U (en) | 2017-12-25 | 2017-12-25 | A kind of multifunctional microcomputer electric motor protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207742526U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110855010A (en) * | 2019-12-11 | 2020-02-28 | 安徽全盟电力科技股份有限公司 | Electrical switch cabinet protection intelligent system with temperature detection function |
-
2017
- 2017-12-25 CN CN201721825382.7U patent/CN207742526U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110855010A (en) * | 2019-12-11 | 2020-02-28 | 安徽全盟电力科技股份有限公司 | Electrical switch cabinet protection intelligent system with temperature detection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180817 Termination date: 20201225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |