CN208241306U - A kind of electric block circuit that can effectively carry out open-phase protection - Google Patents
A kind of electric block circuit that can effectively carry out open-phase protection Download PDFInfo
- Publication number
- CN208241306U CN208241306U CN201820284450.1U CN201820284450U CN208241306U CN 208241306 U CN208241306 U CN 208241306U CN 201820284450 U CN201820284450 U CN 201820284450U CN 208241306 U CN208241306 U CN 208241306U
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- China
- Prior art keywords
- phase
- liter
- control circuit
- decentralization
- contactor
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Abstract
The utility model relates to a kind of electric block circuit that can effectively carry out open-phase protection, including by breaker, the main contacts that hangs liter contactor, transfer the main contacts of contactor and main circuit and control circuit that three-phase conic rotor braking motor is constituted；The control circuit includes hanging a liter control circuit, decentralization control circuit and L1L3 phase open-phase protection circuit；The L1L3 phase open-phase protection circuit includes a relay being connected between the L1 phase of breaker output end and L3 phase, normally opened contact and hang a liter control circuit, decentralization control circuit is connected.The utility model can three-phase conic rotor braking motor effectively to electric block carry out open-phase protection, avoid causing three-phase conic rotor braking motor to burn due to certain one-phase open circuit in three-phase line.
Description
Technical field
The utility model relates to technical field of crane equipment more particularly to a kind of electronic calabashes that can effectively carry out open-phase protection
Reed circuit.
Background technique
Electric block is widely used in lifting weight, generally the three-phase conic rotor braking motor band by having brake function
It is dynamic, the components such as contactor, limiter, operation button are typically provided in operating circuit.In use, usually due to supply lines
The reasons such as road poor contact cause certain one-phase open circuit in three-phase line, and three-phase conic rotor braking motor is caused to burn, existing
In technology, open-phase protection is carried out to three-phase conic rotor braking motor frequently with open phase protector is installed in power supply line, but
Open phase protector mostly uses greatly the electronic components such as capacitance-resistance, since the electronic components such as capacitance-resistance after working after a period of time, component
Characteristic can change, and especially influence vulnerable to extraneous such as thunder and lightning, humidity factor, lead to job insecurity, and once occur
Failure is not easy to repair.
Utility model content
The utility model overcomes the deficiencies in the prior art, provides a kind of electric block that can effectively carry out open-phase protection
Circuit, can three-phase conic rotor braking motor effectively to electric block carry out open-phase protection, avoid due to three-phase power line
In certain one-phase open circuit, cause three-phase conic rotor braking motor to burn, circuit the operation is stable.
The utility model is achieved through the following technical solutions:
Including main circuit and control circuit；The main circuit includes breaker, the main contacts for hanging liter contactor, decentralization contact
The main contacts and three-phase conic rotor braking motor of device；The input terminal of the breaker is separately connected L1, L2, L3 of three phase mains
Phase；Described to hang liter contactor and hang liters for controlling the rotating forward of three-phase conic rotor braking motor, the input terminal of three of them main contacts divides
Not Lian Jie breaker three output ends, output end connect three-phase conic rotor braking motor input terminal；The decentralization contact
Device is separately connected the three of breaker for controlling the decentralization of three-phase conic rotor braking motor reversal, the input terminal of three of them main contacts
A output end, output end connect the input terminal of three-phase conic rotor braking motor, wherein the three main contacts outputs of decentralization contactor
The wherein two-phase at end, which intersects, runs three-phase conic rotor braking motor reversal；
The control circuit includes hanging a liter control circuit, decentralization control circuit and L1L3 phase open-phase protection circuit；
It is described hang L3 phase that liter control circuit includes the breaker output end being serially connected, it is normally opened hang a liter button, decentralization connects
Normally closed second auxiliary contact of tentaculum, the L2 phase for hanging a liter contactor coil, normally closed stop button and breaker output end；It is described to hang
It rises the normally opened third auxiliary contact of contactor and normally opened to hang liter button parallel connection self-locking；
The decentralization control circuit includes the L1 phase of the breaker output end being serially connected, normally opened decentralization button, hangs and liter connect
Normally closed second auxiliary contact of tentaculum, the L2 phase for transferring contactor coil, normally closed stop button and breaker output end；Under described
Normally opened third auxiliary contact and the normally opened decentralization button parallel connection for putting contactor are self-locking；
The L1L3 phase open-phase protection circuit includes a relay being connected between the L1 phase of breaker output end and L3 phase
Device, normally opened contact and hang a liter control circuit, decentralization control circuit connect.
Further, described hang is in series with a normally closed upper limit travel switch in liter control circuit.Upper limit travel switch is arranged to use
It is automatically stopped when rising electric gourd hang hook block in scheduled position, when the movement of upper limit travel switch, normally-closed contact is disconnected
It opens, a liter control circuit is hung in cutting, is hung liter contactor and is disconnected cutting main circuit, three-phase conic rotor braking motor stalls.
Further, a normally closed lower bound range switch is in series in the decentralization control circuit.Lower bound range is set and switchs use
It is automatically stopped when transferring electric hoist suspension hook in scheduled position, when lower bound range switch motion, normally-closed contact is disconnected
It opens, cutting decentralization control circuit, decentralization contactor disconnects cutting main circuit, three-phase conic rotor braking motor stalls.
The beneficial effects of the utility model are: will hang between liter control circuit and decentralization control circuit access phase line, it can be right
The phase line accessed plays effective open-phase protection；The coil of relay is accessed between L1 phase and L3 phase, normally opened contact
With hang a liter control circuit, decentralization control circuit is connected, and can play effective open-phase protection with L3 phase to L1 phase, it is avoidable by
Certain one-phase open circuit in three-phase power line causes three-phase conic rotor braking motor to burn；Open-phase protection element is without electricity
Subcomponent, the operation is stable.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
As shown in Figure 1, the embodiments of the present invention, a kind of electric block circuit that can effectively carry out open-phase protection, packet
Include main circuit and control circuit；The main circuit includes circuit breaker Q F, the main contacts KM1-1 for hanging liter contactor, decentralization contactor
Main contacts KM2-1 and three-phase conic rotor braking motor M；The input terminal of the circuit breaker Q F is separately connected three phase mains
L1, L2, L3 phase；It is described hang liter contactor KM1 for control three-phase conic rotor braking motor M rotating forward hang liter, three of them main touching
The input terminal of point KM1-1 is separately connected three output ends of circuit breaker Q F, and output end connects three-phase conic rotor braking motor M's
Input terminal；The decentralization contactor KM2 is for controlling three-phase conic rotor braking motor M reversion decentralization, three of them main contacts
The input terminal of KM2-1 is separately connected three output ends of circuit breaker Q F, and output end connects the defeated of three-phase conic rotor braking motor M
Enter end, wherein the wherein two-phase of decentralization tri- main contacts KM2-1 output ends of contactor KM2, which intersects, makes three-phase cone rotor system
Dynamic motor M reversion operation；
The control circuit includes hanging a liter control circuit, decentralization control circuit and L1L3 phase open-phase protection circuit；
It is described hang L3 phase that liter control circuit includes the circuit breaker Q F output end being serially connected, it is normally opened hang a liter button SB1, under
It puts the normally closed second auxiliary contact KM2-2 of contactor KM2, hang a liter contactor KM1 coil, normally closed stop button SB3 and breaker
The L2 phase of QF output end；The normally opened third auxiliary contact KM1-3 for hanging liter contactor KM1 and normally opened to hang liter button SB1 in parallel
It is self-locking；
The decentralization control circuit includes the L1 phase for the circuit breaker Q F output end being serially connected, normally opened decentralization button SB2, hangs
Rise normally closed second auxiliary contact KM1-2, decentralization contactor KM2 coil, normally closed stop button SB3 and the breaker of contactor KM1
The L2 phase of QF output end；The normally opened third auxiliary contact KM2-3 and normally opened decentralization button SB2 of the decentralization contactor KM2 is in parallel
It is self-locking；
The L1L3 phase open-phase protection circuit include one be connected between the L1 phase and L3 phase of circuit breaker Q F output end after
Electric appliance K, normally opened contact K-1 and hang a liter control circuit, decentralization control circuit connect.
The working principle of the present embodiment is: when the suspension hook of electric block to hang liter, closing circuit breaker Q F, relay K obtains electric
Movement, normally opened contact K-1 closure；Press it is normally opened hang a liter button SB1, hang liter control circuit and connect, hang a liter contactor KM1 obtain it is electric
Movement, main contacts KM1-1 closure, normally opened third auxiliary contact KM1-3 closure, normally closed second auxiliary contact KM1-2 are disconnected, main
Circuit is connected, and liter is hung in three-phase conic rotor braking motor M rotating forward；The normally closed second auxiliary contact KM1-2 for hanging liter contactor KM1 is disconnected
After opening, interlocking is played to decentralization control circuit, even if pressing normally opened decentralization button SB2 at this time, decentralization control circuit will not
It connects；After hanging the normally opened third auxiliary contact KM1-3 closure of liter contactor KM1, to hang liter button SB1 parallel connection self-locking to normally opened, this
The normally opened liter button SB1 that hangs of Shi Songkai will not influence the operation of three-phase conic rotor braking motor M；It such as to shut down, press normally closed stop
A liter control circuit is hung in only button SB3 cutting, hangs a liter contactor KM1 power loss, and main contacts KM1-1 is disconnected, three-phase cone rotor system
Dynamic motor M is out of service, hangs a liter auxiliary contact of contactor KM1 and also resets.Due to hanging a liter L2 for control circuit connection power supply
Phase and L3 phase, therefore open-phase protection is just served to this two-phase, as long as soon as have phase phase shortage, it hangs a liter control circuit and disconnects, hang liter
Contactor KM1 can not just obtain electric, and main circuit is just not turned on；Since the coil of relay K connects power supply L1 phase and L3 phase,
Open-phase protection is just played to this two-phase, as long as soon as having phase phase shortage, relay K can not obtain electric, and normally opened contact K-1 can not be closed
It closes, hangs a liter control circuit and be not turned on, hanging liter contactor KM1 also just can not energized action.
Similarly, when the suspension hook of electric block to transfer, circuit breaker Q F, relay K energized action, normally opened contact K- are closed
1 closure；Normally opened decentralization button SB2 is pressed, decentralization control circuit is connected, and contactor KM2 energized action, main contacts KM2- are transferred
1 closure, normally opened third auxiliary contact KM2-3 closure, normally closed second auxiliary contact KM2-2 are disconnected, and main circuit is connected, three-phase taper
Rotor brake motor M reversion decentralization；After the normally closed second auxiliary contact KM2-2 disconnection for transferring contactor KM2, to hanging, liter control is electric
Interlocking is played on road, though press at this time it is normally opened hang a liter button SB1, hanging liter control circuit will not connect；Transfer contactor KM2
Normally opened third auxiliary contact KM2-3 closure after, it is self-locking to normally opened decentralization button SB2 parallel connection, unclamp normally opened decentralization button at this time
SB2 will not influence the operation of three-phase conic rotor braking motor M；It such as to shut down, press normally closed stop button SB3 cutting decentralization control
Circuit processed transfers contactor KM2 power loss, and main contacts KM2-1 is disconnected, and three-phase conic rotor braking motor M is out of service, decentralization
The auxiliary contact of contactor KM2 also reset.Due to the L2 phase and L1 phase of decentralization control circuit connection power supply, to this two-phase
Just play open-phase protection, as long as soon as having phase phase shortage, decentralization control circuit disconnects, and decentralization contactor KM2 can not just obtain electric, master
Circuit is just not turned on；Since the coil of relay K connects power supply L1 phase and L3 phase, open-phase protection is just risen to this two-phase and is made
With as long as soon as having phase phase shortage, relay K can not obtain electric, and normally opened contact K-1 can not be closed, and decentralization control circuit can not connect
Logical, decentralization contactor KM2 also just can not energized action.
In the present embodiment, described hang is in series with normally closed upper limit travel switch SQ1 in liter control circuit.Setting upper limit stroke is opened
Close SQ1 for being automatically stopped electric gourd hang hook block when rising in scheduled position, when upper limit travel switch SQ1 movement, often
Closed contact disconnects, and a liter control circuit is hung in cutting, hangs liter contactor KM1 and disconnects cutting main circuit, three-phase conic rotor braking motor M
It stops operating.
In the present embodiment, normally closed lower bound range switch SQ2 is in series in the decentralization control circuit.Setting lower bound range is opened
Close SQ2 for being automatically stopped electric hoist suspension hook when transferring in scheduled position, when lower bound range switch SQ2 movement, often
Closed contact disconnects, and cutting decentralization control circuit, decentralization contactor KM2 disconnects cutting main circuit, three-phase conic rotor braking motor M
It stops operating.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, any change or replacement expected without creative work be should be covered within the scope of the utility model.
Therefore, the protection scope of the utility model should be determined by the scope of protection defined in the claims.
Claims (3)
1. a kind of electric block circuit that can effectively carry out open-phase protection, including main circuit and control circuit；The main circuit packet
Include breaker, the main contacts for hanging liter contactor, the main contacts and three-phase conic rotor braking motor for transferring contactor；The open circuit
The input terminal of device is separately connected L1, L2, L3 phase of three phase mains；Liter contactor that hangs is for controlling three-phase conic rotor braking
Liter is hung in motor rotating forward, and the input terminal of three of them main contacts is separately connected three output ends of breaker, and output end connects three-phase cone
The input terminal of shape rotor brake motor；The decentralization contactor is transferred for controlling three-phase conic rotor braking motor reversal,
The input terminal of three main contacts is separately connected three output ends of breaker, and output end connects three-phase conic rotor braking motor
Input terminal, wherein the wherein two-phase of decentralization three main contacts output ends of contactor, which intersects, makes three-phase conic rotor braking motor
Reversion operation；It is characterized by:
The control circuit includes hanging a liter control circuit, decentralization control circuit and L1L3 phase open-phase protection circuit；
It is described to hang L3 phase that liter control circuit includes the breaker output end being serially connected, normally opened hang a liter button, decentralization contactor
Normally closed second auxiliary contact, hang the L2 phase of a liter contactor coil, normally closed stop button and breaker output end；The liter that hangs connects
Normally opened third auxiliary contact of tentaculum and normally opened to hang liter button parallel connection self-locking；
The decentralization control circuit includes the L1 phase for the breaker output end being serially connected, normally opened decentralization button, hangs a liter contactor
Normally closed second auxiliary contact, decentralization contactor coil, normally closed stop button and breaker output end L2 phase；The decentralization connects
The normally opened third auxiliary contact of tentaculum and normally opened decentralization button parallel connection are self-locking；
The L1L3 phase open-phase protection circuit includes a relay being connected between the L1 phase of breaker output end and L3 phase,
Normally opened contact and hang a liter control circuit, decentralization control circuit connect.
2. a kind of electric block circuit that can effectively carry out open-phase protection according to claim 1, it is characterised in that: described
It hangs and is in series with a normally closed upper limit travel switch in liter control circuit.
3. a kind of electric block circuit that can effectively carry out open-phase protection according to claim 1, it is characterised in that: described
A normally closed lower bound range switch is in series in decentralization control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820284450.1U CN208241306U (en) | 2018-03-01 | 2018-03-01 | A kind of electric block circuit that can effectively carry out open-phase protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820284450.1U CN208241306U (en) | 2018-03-01 | 2018-03-01 | A kind of electric block circuit that can effectively carry out open-phase protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208241306U true CN208241306U (en) | 2018-12-14 |
Family
ID=64588648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820284450.1U Expired - Fee Related CN208241306U (en) | 2018-03-01 | 2018-03-01 | A kind of electric block circuit that can effectively carry out open-phase protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208241306U (en) |
-
2018
- 2018-03-01 CN CN201820284450.1U patent/CN208241306U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181214 Termination date: 20190301 |