CN105186457B - Motor Protective Device - Google Patents
Motor Protective Device Download PDFInfo
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- CN105186457B CN105186457B CN201510665525.1A CN201510665525A CN105186457B CN 105186457 B CN105186457 B CN 105186457B CN 201510665525 A CN201510665525 A CN 201510665525A CN 105186457 B CN105186457 B CN 105186457B
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- motor
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- protecter
- contactor
- power supply
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Abstract
The present invention relates to Protection Technology for Motors field; more particularly to a kind of motor Protective Device; including low-tension motor, current transformer and motor protecter; described low-tension motor is connected by contactor KM1 with power supply; the input that current transformer is arranged on low-tension motor is used to monitor input current, and motor protecter receives the current signal that current transformer collects and control contactor KM1 closures or disconnection.By setting current transformer; the electric current of low-tension motor can be gathered in time, and protection, the programmable setting of motor protecter are realized in the current value control contactor KM1 actions that motor protecter collects according to current transformer; it is more live can easily to change parameter, the applicable situations such as setting current.
Description
Technical field
The present invention relates to Protection Technology for Motors field, more particularly to a kind of motor Protective Device.
Background technology
Motor is substantially the main force of power-equipment in living, and application popularization is extensive, and it has been essentially involved respectively
Each industry of row, its status can not be weighed with numeral with language, however, being exactly so important equipment, in actual use process
In, due to power network, motor is in itself or some row factors of circuit etc. can cause motor overvoltage occur, and under-voltage, electric current is uneven
The failure such as weighing apparatus and excessively stream, these failures the lighter influence being normally carried out for production, and severe one burns motor, cause whole equipment paralysis
Even system crash, in turn results in economic loss difficult to the appraisal.In addition, the electricity that is consumed during burning of motor is also very
Greatly, accordingly, it is considered to economic loss with economizing on resources, the protection work for carrying out motor all makes great sense, it is necessary to turns into
The problem of enough attention.
The content of the invention
It is an object of the invention to provide it is a kind of reliably, programmable motor Protective Device.
To realize object above, the technical solution adopted by the present invention is：
A kind of motor Protective Device, including low-tension motor, current transformer and motor protecter, it is described
Low-tension motor is connected by contactor KM1 with power supply, and the input that current transformer is arranged on low-tension motor is used to monitor
Input current, motor protecter receive the current signal that current transformer collects and control contactor KM1 closures or disconnection.
Compared with prior art, there is following technique effect in the present invention：By setting current transformer, can gather in time
The electric current of low-tension motor, the current value control contactor KM1 that motor protecter collects according to current transformer, which is acted, to be realized
Protection, the programmable setting of motor protecter, it is more live can easily to change parameter, the applicable situations such as setting current.
Brief description of the drawings
Fig. 1 is the theory diagram of the present invention；
Fig. 2 is the circuit diagram of the present invention.
Embodiment
With reference to Fig. 1 to Fig. 2, the present invention is described in further detail.
Refering to Fig. 1, the development of computer technology makes the change that electric motor protecting is advanced by leaps and bounds, and intelligent protection occurs
Device, Intelligent protection equipment have the advantages that speed is fast, and intelligence degree is high, it using single-chip microcomputer or DSP as controller,
Realize intelligent protection.Intelligent protection equipment can be protected to motor phase failure, overload, short circuit, under-voltage, stall etc., also gather around
There is display Current Voltage, the function of the memory to failure；It is also possible to software gamma correction is carried out to sampled signal, it is real
The calculating and sampling with high precision extraction of existing authentic and valid value.Such protector energy-conservation, sensitive, accurate defencive function is complete, repeatability
It is good.In the present invention, employ intelligentized motor protecter 30 avoid described in background technology and deficiency, its specific side
Case is：A kind of motor Protective Device, including low-tension motor 10, current transformer 20 and motor protecter 30, institute
The low-tension motor 10 stated is connected by contactor KM1 with power supply 40, and current transformer 20 is arranged on the defeated of low-tension motor 10
Enter end to be used to gather input current, motor protecter 30 receives the current signal that current transformer 20 collects and control contactor
KM1 is closed or disconnected.The input electric current of low-tension motor 10 is acquired by current transformer 20, motor protecter 30
Acted according to the current value collected come control contactor KM1, realize the protection of low-tension motor 10, this protection can be used for
0.66KV and the various current specification motor of following voltage class basic protection.
Refering to Fig. 2, specifically, described power supply 40 is three-phase electricity, and the port 1 of motor protecter 30 is after fuse FU
It is connected with the A phase lines of power supply 40, the port 2 of motor protecter 30 is connected with the zero line N of power supply 40；End in motor protecter 30
Mouth 21 is connected after fuse FU with the A phase lines of power supply, the port 22 of motor protecter 30 and contactor KM1 coil one end
It is connected, the other end of the coil is connected with the zero line N of power supply 40；Contactor KM1 coil both ends are also parallel with resistance and electric capacity.
Here the port 21,22 of motor protecter 30 namely the repeat circuit J1 of motor protecter 30 normally-closed contact, common, then often
Under state, because the port 21,22 of motor protecter 30 is connection, so contactor KM1 coil obtains electric, contactor KM1 is closed
Closing, low-tension motor 10 is connected with power supply 40, normal work, once there is exception in the electric current that current transformer 20 collects,
Relay J1 is acted, and the port 21,22 of motor protecter 30 disconnects, and contactor KM1 coil losing electricity, contactor KM1 disconnects, low
Piezoelectricity motivation 10 is separated with power supply 40, is effectively protected low-tension motor 10.
Preferably, it is disposed with and opens between the port 22 of the motor protecter 30 and one end of contactor KM1 coils
Dynamic button, stop button；Start button is button switch open in usual, and stop button is normally closed type button switch；By start button
Side is parallel with switch KM2, and KM2 closures are switched when contactor KM1 coil obtains electric, switch KM2 during contactor KM1 coil losing electricity
Disconnect.After start button is set so that contactor KM1 is still remained open when whole system obtains electric, and low-tension motor 10 is still
It is stopped, only presses start button, whole system ability normal work.Stop button is set, can be in an emergency
When, the security of artificial power-off, further raising whole device.Due to there is provided switch KM2, so start button and parking are pressed
Button can use button switch, certainly, be not provided with switch KM2 can also, simply this when, start button and stop button are just
It is arranged to knob switch after controlling switch.
When in use, operating personnel press start button first, and this when, contactor KM1 coil obtained electric, contactor
KM1 is closed, and low voltage motor 10 switches on power 40 normal works；Meanwhile switch KM2 closures.Then, opened even if operating personnel disclose
Dynamic button, due to switch KM2 closures, the present apparatus continues normal work.When failure and 30 reactionless need of motor protecter
When wanting emergency shutdown, operating personnel press stop button, contactor KM1 coil losing electricity, and contactor KM1 disconnects and switch KM2
Disconnect, now, even if operating personnel unclamp stop button, due to switch KM2 and start button be disconnect, whole device according to
So it is off work.
Preferably, the port 31,32 of the motor protecter 30 is connected with current transformer 20 for receiving Current Mutual Inductance
The current information that device 20 collects, the port 32 of motor protecter 30 are grounded.
Further, drawn respectively in A, B, C phase line of the power supply 40 branch road successively by primary cut-out QF,
It is connected after contactor KM1, control IGCT MCT with low-tension motor 10；The port 11,12,13 of motor protecter 30 respectively with
Three inputs of low-tension motor 10 are connected.Primary cut-out QF and control IGCT MCT are set mainly for the protection of circuit.
Further, SR is connected between the port 70,73 of the motor protecter 30, SR is used for
Reset and use when motor protecter 30 breaks down.The port 24,25 of motor protecter 30 is used to export leakage pre-alarm signal, electricity
The port 26,27 of machine protector 30 is used to export conventional fault alarm signal.User can connect motor protecter 30 as needed
24-27 ports.
Further, the port 15,16 of the motor protecter 30 is used to export 4-20mA analog quantitys.Motor protecter 30
Port 58,59 be connected with background computer as communication interface, can easily thus send data to hind computation
Machine, it is easy to follow-up processing, analysis, storage.
Claims (6)
- A kind of 1. motor Protective Device, it is characterised in that：Including low-tension motor (10), current transformer (20) and Motor protecter (30), described low-tension motor (10) are connected by contactor KM1 with power supply (40), current transformer (20) The input for being arranged on low-tension motor (10) is used to gather input current, and motor protecter (30) receives current transformer (20) Current signal and control contactor the KM1 closure collected or disconnection；Described power supply (40) is three-phase electricity, motor protecter (30) A phase line of the port 1 with power supply (40) after fuse FU is connected, the port 2 of motor protecter (30) and power supply (40) zero line N is connected；Port 21 in motor protecter (30) is connected after fuse FU with the A phase lines of power supply, motor The port 22 of protector (30) is connected with contactor KM1 coil one end, the other end of the coil and the zero line N phases of power supply (40) Even；Contactor KM1 coil both ends are also parallel with resistance and electric capacity.
- 2. motor Protective Device as claimed in claim 1, it is characterised in that：The port of the motor protecter (30) Start button, stop button are disposed between 22 and one end of contactor KM1 coils；Start button is that button open in usual is opened Close, stop button is normally closed type button switch；Start button side is parallel with switch KM2, and contactor KM1 coil is opened when obtaining electric KM2 closures are closed, KM2 is switched during contactor KM1 coil losing electricity and is disconnected.
- 3. motor Protective Device as claimed in claim 1, it is characterised in that：The port of the motor protecter (30) 31st, 32 are connected with current transformer (20) for receiving the current information that current transformer (20) collects, motor protecter (30) port 32 is grounded.
- 4. motor Protective Device as claimed in claim 1, it is characterised in that：A, B, C phase line of the power supply (40) It is upper draw respectively a branch road successively after primary cut-out QF, contactor KM1, control IGCT MCT with low-tension motor (10) it is connected；The port 11,12,13 of motor protecter (30) is connected with three inputs of low-tension motor (10) respectively.
- 5. motor Protective Device as claimed in claim 1, it is characterised in that：The port of the motor protecter (30) 70th, SR is connected between 73, the port 24,25 of motor protecter (30) is used to export leakage pre-alarm signal, and motor is protected The port 26,27 of shield device (30) is used to export conventional fault alarm signal.
- 6. motor Protective Device as claimed in claim 1, it is characterised in that：The port of the motor protecter (30) 15th, 16 are used to export 4-20mA analog quantitys；The port 58,59 of motor protecter (30) is used as communication interface and background computer phase Even.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510665525.1A CN105186457B (en) | 2015-10-16 | 2015-10-16 | Motor Protective Device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510665525.1A CN105186457B (en) | 2015-10-16 | 2015-10-16 | Motor Protective Device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105186457A CN105186457A (en) | 2015-12-23 |
| CN105186457B true CN105186457B (en) | 2018-03-30 |
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ID=54908379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510665525.1A Active CN105186457B (en) | 2015-10-16 | 2015-10-16 | Motor Protective Device |
Country Status (1)
| Country | Link |
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| CN (1) | CN105186457B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106740993B (en) * | 2016-12-14 | 2018-10-16 | 太原科技大学 | It is a kind of with the railway signaling dynamic driving device of defencive function and its guard method |
| CN108695826A (en) * | 2018-06-26 | 2018-10-23 | 河南森源电气股份有限公司 | A kind of protective device and activation system of low-tension motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202437A (en) * | 2007-12-21 | 2008-06-18 | 王卫东 | Plastic shell type electromechanical integration three phase ac electric motor protector |
| CN101593965A (en) * | 2008-05-26 | 2009-12-02 | 鞍钢集团矿业公司 | The intelligent low-pressure motor protecter of charged energy function of measuring |
| CN103997020A (en) * | 2014-06-12 | 2014-08-20 | 株洲南车时代电气股份有限公司 | Protector for three-phase motor of alternating-current or direct-current electric locomotive |
| CN205039323U (en) * | 2015-08-17 | 2016-02-17 | 六盘水师范学院 | Plug with adsorb leather cup |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007084140A1 (en) * | 2006-01-20 | 2007-07-26 | Carrier Corporation | Electronic method for starting a compressor |
-
2015
- 2015-10-16 CN CN201510665525.1A patent/CN105186457B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202437A (en) * | 2007-12-21 | 2008-06-18 | 王卫东 | Plastic shell type electromechanical integration three phase ac electric motor protector |
| CN101593965A (en) * | 2008-05-26 | 2009-12-02 | 鞍钢集团矿业公司 | The intelligent low-pressure motor protecter of charged energy function of measuring |
| CN103997020A (en) * | 2014-06-12 | 2014-08-20 | 株洲南车时代电气股份有限公司 | Protector for three-phase motor of alternating-current or direct-current electric locomotive |
| CN205039323U (en) * | 2015-08-17 | 2016-02-17 | 六盘水师范学院 | Plug with adsorb leather cup |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105186457A (en) | 2015-12-23 |
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