CN203553903U - Power motor protection device - Google Patents
Power motor protection device Download PDFInfo
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- CN203553903U CN203553903U CN201320729557.XU CN201320729557U CN203553903U CN 203553903 U CN203553903 U CN 203553903U CN 201320729557 U CN201320729557 U CN 201320729557U CN 203553903 U CN203553903 U CN 203553903U
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- output
- motor
- relay
- circuit breaker
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Abstract
The utility model discloses a power motor protection device, which comprises a three-phase four-wire leakage breaker QF, a first intermediate relay KA1, a second intermediate relay KA2, a remote control switch SAC, an AC contactor KM, an over-current thermal relay KR, and a through-core integrated motor protector A7. The device is high in automation degree and controllability. Meanwhile, the device can adapt to situations when a motor encounters faults, such as instantaneous overload, over current, over voltage, under current, short circuit, open phase, leakage and phase fault, and provides power-off protection.
Description
Technical field
The utility model relates to vehicle-mounted power supply unit field, relates in particular to a kind of power electric protector.
Background technology
The power electric protector using in some areas is simpler and cruder, for example: wherein a kind of: only with Three-phase knife switch, realize switching controls, obvious this mode coefficient of safety is lower, but also needs manual operation, operate and inconvenience;
Another: utilize A.C. contactor and single-phase plug-in strip to coordinate and control, for example: with one 10 single-phase knife switch of pacifying be connected to A.C. contactor in be equipped with moving winding.But, if any one the position virtual connection between circuit and electric component of this control circuit, phase shortage, or the thin electric current of motor operation center line is too low, overload, stall, when the situation such as electric leakage occurs, all can not stop in time the operation of motor, with this, reduce the risk of motor irregular operating.
Utility model content
The purpose of this utility model is to provide a kind of power electric protector, to address the above problem.
In order to achieve the above object, the technical solution of the utility model is achieved in that
The utility model provides a kind of power electric protector, comprises three-phase and four-line residual current circuit breaker QF, the first auxiliary relay KA1, the second auxiliary relay KA2, remote control switch SAC, A.C. contactor KM, overcurrent thermal relay KR, core-theaded type comprehensive protector of motor A7;
The mode of connection is: described three-phase and four-line residual current circuit breaker QF connects power supply and exports A, B, C three-phase electricity according to three-phase four-wire system; The C phase of three-phase and four-line residual current circuit breaker QF output described in the input termination of the normally opened contact of described the first auxiliary relay KA1, the output of the normally opened contact of described the first auxiliary relay KA1 connect described overcurrent thermal relay KR in establish contact output; The input of the normally-closed contact of described the second auxiliary relay KA2 connects the B phase of described three-phase and four-line residual current circuit breaker QF output, the output of the normally-closed contact of described the second auxiliary relay KA2 connects the input of the restraining coil of described A.C. contactor KM, the output of the restraining coil of described A.C. contactor KM connect described overcurrent thermal relay KR in establish contact input;
The coil input end of described the first auxiliary relay KA1 connects the C phase of described three-phase and four-line residual current circuit breaker QF output, the coil output of described the first auxiliary relay KA1 connect described core-theaded type comprehensive protector of motor A7 in establish the input of relay switch; The coil input end of described the second auxiliary relay KA2 connects the B phase of described three-phase and four-line residual current circuit breaker QF output, the coil output of described the second auxiliary relay KA2 connects the input of described remote control switch SAC, and the output of described remote control switch SAC connects the A phase of described three-phase and four-line residual current circuit breaker QF output;
A, B, the C three-phase electricity of described three-phase and four-line residual current circuit breaker QF output, and be connected in series successively respectively A.C. contactor KM, overcurrent thermal relay KR, normally opened contact that core-theaded type comprehensive protector of motor A7 is corresponding;
The output of establishing relay switch in described core-theaded type comprehensive protector of motor A7 is connected in the B phase place of three-phase and four-line residual current circuit breaker QF output; In described core-theaded type comprehensive protector of motor A7, establishing transformer output is connected in the C phase place of three-phase and four-line residual current circuit breaker QF output.
Compared with prior art, the advantage of the utility model embodiment is:
A kind of power electric protector that the utility model provides, wherein, analyzes said structure known: this motor protecting device has installed core-theaded type comprehensive protector of motor additional, and its power can regulate.Be mainly used in: the control of motor even load and protection, it has: overload, overcurrent, under-voltage, overvoltage, undercurrent, short circuit, phase shortage, electric leakage, phase place comprehensive function.But in order to prevent that it from further producing fault problem; this motor protecting device has also installed the first auxiliary relay KA1, the second auxiliary relay KA2, remote control switch SAC, A.C. contactor KM, overcurrent thermal relay KR additional and has formed another control circuit; prevent from producing fault after core-theaded type integrated protector for electric motor lost efficacy; therefore this circuit structure has played double insurance effect, and it can ensure the normal operation of motor further.
Accompanying drawing explanation
The circuit interconnect pattern of the power electric protector that Fig. 1 provides for the utility model embodiment mono-;
Wherein: three-phase and four-line residual current circuit breaker QF; The first auxiliary relay KA1; The second auxiliary relay KA2; Remote control switch SAC; A.C. contactor KM; Overcurrent thermal relay KR; Core-theaded type comprehensive protector of motor A7; The power-line terminal A8 of three-phase and four-line; The binding post A9 of motor.
Embodiment
Below by specific embodiment, also by reference to the accompanying drawings the utility model is described in further detail.
Embodiment mono-
Referring to Fig. 1, the utility model embodiment mono-provides a kind of power electric protector, comprises three-phase and four-line residual current circuit breaker QF, the first auxiliary relay KA1, the second auxiliary relay KA2, remote control switch SAC, A.C. contactor KM, overcurrent thermal relay KR, core-theaded type comprehensive protector of motor A7;
The mode of connection is: described three-phase and four-line residual current circuit breaker QF connects power supply and exports A, B, C three-phase electricity according to three-phase four-wire system; The input 11 of the normally opened contact of described the first auxiliary relay KA1 connects the C phase of described three-phase and four-line residual current circuit breaker QF output, the output 12 of the normally opened contact of described the first auxiliary relay KA1 connect described overcurrent thermal relay KR in establish contact output 52; The input 21 of the normally-closed contact of described the second auxiliary relay KA2 connects the B phase of described three-phase and four-line residual current circuit breaker QF output, the output 22 of the normally-closed contact of described the second auxiliary relay KA2 connects the input 41 of the restraining coil of described A.C. contactor KM, the output 42 of the restraining coil of described A.C. contactor KM connect described overcurrent thermal relay KR in establish contact input 51;
The coil input end 13 of described the first auxiliary relay KA1 connects the C phase of described three-phase and four-line residual current circuit breaker QF output, the coil output 14 of described the first auxiliary relay KA1 connect described core-theaded type comprehensive protector of motor A7 in establish relay switch 61 inputs (wherein, 61 be comprehensive protection device inside in establish normally closed relay switch); The coil input end 23 of described the second auxiliary relay KA2 connects the B phase of described three-phase and four-line residual current circuit breaker QF output, the coil output 24 of described the second auxiliary relay KA2 connect described remote control switch SAC in establish contact input 31, in described remote control switch SAC, establish the A phase that contact output 32 connects described three-phase and four-line residual current circuit breaker QF output;
A, B, the C three-phase electricity of described three-phase and four-line residual current circuit breaker QF output, and be connected in series successively respectively A.C. contactor KM, overcurrent thermal relay KR, normally opened contact that core-theaded type comprehensive protector of motor A7 is corresponding;
The output of establishing relay switch 61 in described core-theaded type comprehensive protector of motor A7 is connected in the B phase place of three-phase and four-line residual current circuit breaker QF output; In described core-theaded type comprehensive protector of motor A7, establishing transformer 62 outputs is connected in the C phase place of three-phase and four-line residual current circuit breaker QF output.And, the output of establishing relay switch 61 in A7 also connect with A7 in establish the input of transformer.
It should be noted that two position transformations of establishing the external connection of part in establishing contact output 32 in above-mentioned remote control switch SAC and being.In described core-theaded type comprehensive protector of motor A7 62 establishes transformer in being, however core-theaded type comprehensive protector of motor A7 in establish relay switch 61 and establish relay switch in being.Wherein, in the restraining coil of the first auxiliary relay KA1 and core-theaded type comprehensive protector of motor A7, establish coil and be 380 volts of voltages.
Obviously, for the generator in this power electric protector, belong to the common practise it will be appreciated by those skilled in the art that, the utility model embodiment repeats no longer one by one to this.It should be noted that, in low-voltage network, transmission line generally adopts three-phase four-wire system, wherein: three-line represents respectively A, B, C three-phase, if another is the neutral ground of this ring current side of neutral line N(, the neutral line is also referred to as zero line).ABC refers to the phase place of mains side.
The power electric protector that the utility model embodiment provides its essence is and utilizes current several new electric component to be assembled into together, formed the circuit with multinomial protective capability.Wherein: installed core-theaded type comprehensive protector of motor additional, its power can regulate, for example: power adjustable extent is 0.5-40 kilowatts; " comprehensive protector of motor ".Be mainly used in: control and the protection of blower fan, water pump, motor even load, it has: the comprehensive function such as overload, overcurrent, under-voltage, overvoltage, undercurrent, short circuit, phase shortage, electric leakage, phase place.
Concrete scheme is as follows: but in order to prevent that it from further producing fault problem; therefore; the utility model embodiment has also installed the first auxiliary relay KA1, the second auxiliary relay KA2, remote control switch SAC, A.C. contactor KM, overcurrent thermal relay KR additional and has formed another control circuit; prevent from producing fault after core-theaded type integrated protector for electric motor lost efficacy; therefore this circuit structure has played double insurance effect, and it can ensure the normal operation of motor further.
The utility model is provided by the core-theaded type integrated protector for electric motor providing, and specifically can choose JD-5B core-theaded type integrated protector for electric motor (being A7).
Analyze its structure known: first by QF three-phase and four-line residual current circuit breaker supply power.After connection, open the restraining coil work of SAC remote control switch KA2 auxiliary relay, KM works simultaneously, and the working condition of KM switches on power by KA2 is normally closed, gets B and enters mutually KM restraining coil and through overtemperature relay, enter often opening with C of KA1 auxiliary relay and be connected.
JD-5B core-theaded type integrated protector for electric motor (being A7) is used in conjunction with KA1 auxiliary relay.380 volts of the operating voltages of A7 are got the phase with B phase C, and the restraining coil that is entered mutually KA1 auxiliary relay by B is connected to C phase place.KR is thermal relay and be connected in C phase the normal battle of KA1 auxiliary relay, thermal relay other end B is fed into the restraining coil of KM A.C. contactor by the normally closed point of KA2 auxiliary relay, by establishing coil in KM, reenter the normal battle that KR thermal relay connects KA1 auxiliary relay.
While working in JD-5B moment, KA1 also can work and disconnect C phase voltage.JD-5B resets, and SAC Remote reset self-locking quits work.
How introduce JD-5B core-theaded type integrated protector for electric motor below realizes and cutting off the electricity supply
The operation principle of JD-5B, its work is the alternating voltage of establishing transformer input 380V by interior, is output as the voltage of 12V, specializes in inner each several part branch road and uses, and has had voltage A7 just can normally work.Between the positive and negative 10%-12% of its input voltage, A7 can normally work.
As crossed lower than 10% negative voltage, when three-phase voltage reaches 340V JD-5B in establish relay switch and automatically thread off and disconnect normal battle of the C phase of KA1.In other words, JD-5B automatically threads off and just being equipped with moving winding in KA1, switches on power work once, and KA1 has just disconnected in a flash the restraining coil power supply of KM.Disconnected the three phase mains of motor M simultaneously.
About being provided with three cover punching induction pieces in phase shortage JD-5B core-theaded type integrated protector for electric motor, produce balanced voltage, by the interior voltage 12V that establishes, control Self-operating.
As occur overload, overcurrent, the situation such as under-voltage, inside establishes induction pieces and has lost balance and produce a small current/voltage, passes to processor, by processor pass fast in establish relay switch and cut off the working point C phase of KA1, when with regard to this, the three phase mains of motor M cuts off in a flash, SAC, because the SAC that obtains once strikeing back current work resets to normally closed point, has disconnected the voltage relationship of KA2 restraining coil, the three phase mains that simultaneously disconnects KM, at this moment M quits work.
Therefore, by KA1, KA2, SAC, the circuit that the protection of JD-5B odt circuit is used in conjunction with formation can make JD-5B tripping operation not repeat.
About earth leakage protective, by QF and JD-5B, worked in coordination with; During driving force motor reruns, containing lead-in wire electrical leakage quantity, while exceeding certain threshold value as electrical leakage quantity, QF and JD-5B will cut off the electricity supply simultaneously, and driving force motor is protected; As electrical leakage quantity hour just has several milliamperes of normal battles that disconnected KA1 by JD-5B, SAC also can work simultaneously, cuts off the restraining coil voltage relationship of KA2.
How introduce SAC below realizes and cutting off the electricity supply;
The operation principle of SAC, establishes transformer and is input as the alternating voltage of 220V in it.Secondary is output as the normal working voltage of 12V, and its input voltage also can be between 10%-12%.If any cross SAC during low supply voltage in establish relay switch and thread off voluntarily.When too high, by the interior processor of establishing, establish the restraining coil power supply that restraining coil power supply that relay cuts off KA2 also can cut off KM in being given to.
Introduce KR, KA2 below, SAC combines the work of helping each other.
In KR, establish movably three cover electric heating sheet metals, movably three cover electric heating sheet metals are the heat that flows through according to electric current and fixed movably size.In KR, be provided with regulating current device, cisco unity malfunction while turning down, does not have the supply voltage relation of cutting off KM restraining coil while tuning up, lose protection effect.Three branch's tasks are exactly the power supply relation that disconnection B, a C two-phase power supply box are opened two-phase in a word.Bis-branch's tasks of JD-5B and KA1 also can be related to automatic operation KM work by a cut-out BC two-phase power supply.The normally closed point (normally-closed contact) that resets when A7 has worked, normal make war (normally opened contact) resets when KA1 has worked.
It should be noted that, foregoing by the agency of in JD-5B, establish the normally closed point of relay switch and the working condition of normal energising moment of making war.In JD-5B, establishing transformer is 380V alternating voltage.It is exactly often to open that non-transformer voltage is made war often.In only having, establish transformer when energising former often opening and become normally closedly, normally closed often becoming opens, and cuts off the source current that is equipped with moving winding in KA1.Just when occurring abnormal operation power supply containing lead-in wire and mechanical load, motor contains electric leakage, overload, overcurrent condition in a flash normally closed become often open the input 11 that is equipped with the normally opened contact in moving winding braking KA1 in KA1, normally opened contact output 12(as shown in Figure 1) normal battle become in a flash normally closedly, cut off the restraining coil power supply relation of KM.Because establishing transformation in JD-5B, electric current and voltage exist reset normally closed, the input 11 of the normally opened contact of KA1, the output 12(of normally opened contact are as shown in Figure 1) some position reset and often open in a flash.SAC is subject to the normally closed point of flashy counterattack supply voltage impact reset.The restraining coil work that remote signal input will not conducting KA2 as not having.Motor, at the no matter what's going on tripping operation conducting KM that also can not reset of when operation, can make KM remain static operating state like this.
Indicate: 220 volts (SAC) during the operating voltage of remote control machine;
Indicate: JD-5B(is A7) in to establish relay be normally closed.(A7 and SAC are used in conjunction with as never repetition of tripping operation).
Below the concrete structure of above-mentioned power electric protector is described further:
Preferably, above-mentioned power electric protector also comprises motor;
A, B, the C three-phase electricity of the output output of three normally opened contacts of described core-theaded type comprehensive protector of motor A7 connect respectively on corresponding three-phase terminal of described motor.
Preferably,
Described remote control switch SAC inside is also provided with potential device; The input voltage of described remote control switch SAC is 220V.
Preferably,
Described core-theaded type comprehensive protector of motor A7 inside is also provided with potential device.
Preferably,
The power adjustable extent of described core-theaded type comprehensive protector of motor is 0.5-40 kilowatts.
It should be noted that, the power electric protector that the utility model embodiment provides, has simple to operate; working stability; can directly be with the start of power termination motor and operation, when exceeding temperature range, overtemperature relay will play a protective role, and guarantees system safety reliability service.
The power electric protector key point that the utility model embodiment provides is: be engaged in that staff and electrician personnel can not spend the whether virtual connection of wire terminal place of searching between each electric component and each contact or coil access point, vacation connects, can play equally the effect of power-off.
The power electric protector that the utility model embodiment provides is re-assemblied and is connected into a kind of new circuit structure by circuit; this protective device more perfect functions, protection precision higher; move more reliable, and (by Remote, can realize) easy to use.
The power electric protector that the utility model provides; automaticity is higher; controllability is strong, in the time of simultaneously can adapting to motor and run into the faults such as momentary overload, overcurrent, overvoltage, undercurrent, short circuit, phase shortage, electric leakage, phase place, plays the effect of power-off protection.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (5)
1. a power electric protector, it is characterized in that, comprise three-phase and four-line residual current circuit breaker QF, the first auxiliary relay KA1, the second auxiliary relay KA2, remote control switch SAC, A.C. contactor KM, overcurrent thermal relay KR, core-theaded type comprehensive protector of motor A7;
The mode of connection is: described three-phase and four-line residual current circuit breaker QF connects power supply and exports A, B, C three-phase electricity according to three-phase four-wire system; The C phase of three-phase and four-line residual current circuit breaker QF output described in the input termination of the normally opened contact of described the first auxiliary relay KA1, the output of the normally opened contact of described the first auxiliary relay KA1 connect described overcurrent thermal relay KR in establish contact output; The input of the normally-closed contact of described the second auxiliary relay KA2 connects the B phase of described three-phase and four-line residual current circuit breaker QF output, the output of the normally-closed contact of described the second auxiliary relay KA2 connects the input of the restraining coil of described A.C. contactor KM, the output of the restraining coil of described A.C. contactor KM connect described overcurrent thermal relay KR in establish contact input;
The coil input end of described the first auxiliary relay KA1 connects the C phase of described three-phase and four-line residual current circuit breaker QF output, the coil output of described the first auxiliary relay KA1 connect described core-theaded type comprehensive protector of motor A7 in establish the input of relay switch; The coil input end of described the second auxiliary relay KA2 connects the B phase of described three-phase and four-line residual current circuit breaker QF output, the coil output of described the second auxiliary relay KA2 connects the input of described remote control switch SAC, and the output of described remote control switch SAC connects the A phase of described three-phase and four-line residual current circuit breaker QF output;
A, B, the C three-phase electricity of described three-phase and four-line residual current circuit breaker QF output, and be connected in series successively respectively A.C. contactor KM, overcurrent thermal relay KR, normally opened contact that core-theaded type comprehensive protector of motor A7 is corresponding;
The output of establishing relay switch in described core-theaded type comprehensive protector of motor A7 is connected in the B phase place of three-phase and four-line residual current circuit breaker QF output; In described core-theaded type comprehensive protector of motor A7, establishing transformer output is connected in the C phase place of three-phase and four-line residual current circuit breaker QF output.
2. power electric protector as claimed in claim 1, is characterized in that,
Also comprise motor;
A, B, the C three-phase electricity of the output output of three normally opened contacts of described core-theaded type comprehensive protector of motor A7 connect respectively on corresponding three-phase terminal of described motor.
3. power electric protector as claimed in claim 1, is characterized in that,
Described remote control switch SAC inside is also provided with potential device; The input voltage of described remote control switch SAC is 220V.
4. power electric protector as claimed in claim 1, is characterized in that,
Described core-theaded type comprehensive protector of motor A7 inside is also provided with potential device.
5. power electric protector as claimed in claim 1, is characterized in that,
The power adjustable extent of described core-theaded type comprehensive protector of motor is 0.5-40 kilowatts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320729557.XU CN203553903U (en) | 2013-11-18 | 2013-11-18 | Power motor protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320729557.XU CN203553903U (en) | 2013-11-18 | 2013-11-18 | Power motor protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203553903U true CN203553903U (en) | 2014-04-16 |
Family
ID=50471972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320729557.XU Expired - Fee Related CN203553903U (en) | 2013-11-18 | 2013-11-18 | Power motor protection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203553903U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659746A (en) * | 2014-11-14 | 2015-05-27 | 国家电网公司 | Comprehensive protection compensation control box for motor of agricultural motor-pumped well |
| CN107516871A (en) * | 2016-06-17 | 2017-12-26 | 中国石油天然气股份有限公司 | Metering gating device |
| CN111852926A (en) * | 2020-07-22 | 2020-10-30 | 新风光电子科技股份有限公司 | Energy-saving fan control system with temperature and humidity detection function and control method |
-
2013
- 2013-11-18 CN CN201320729557.XU patent/CN203553903U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659746A (en) * | 2014-11-14 | 2015-05-27 | 国家电网公司 | Comprehensive protection compensation control box for motor of agricultural motor-pumped well |
| CN107516871A (en) * | 2016-06-17 | 2017-12-26 | 中国石油天然气股份有限公司 | Metering gating device |
| CN111852926A (en) * | 2020-07-22 | 2020-10-30 | 新风光电子科技股份有限公司 | Energy-saving fan control system with temperature and humidity detection function and control method |
| CN111852926B (en) * | 2020-07-22 | 2022-04-08 | 新风光电子科技股份有限公司 | Energy-saving fan control system with temperature and humidity detection function and control method |
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| C14 | Grant of patent or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 024207 the Inner Mongolia Autonomous Region Chifeng City Zi Zhen Xi Zi Cun Xi Ning County six groups Patentee after: Liu Pinyi Address before: The 6 group of 024207 the Inner Mongolia Autonomous Region Ningcheng County Xi Zi Cun Patentee before: Liu Pinyi |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20161118 |