CN208707556U - A kind of new type auto reduced-voltage starting control electric cabinet - Google Patents
A kind of new type auto reduced-voltage starting control electric cabinet Download PDFInfo
- Publication number
- CN208707556U CN208707556U CN201821261356.0U CN201821261356U CN208707556U CN 208707556 U CN208707556 U CN 208707556U CN 201821261356 U CN201821261356 U CN 201821261356U CN 208707556 U CN208707556 U CN 208707556U
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- control
- contactor
- relay
- electrically connected
- normally
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Abstract
The utility model relates to a kind of new type auto reduced-voltage startings to control electric cabinet; controlling electric cabinet includes cabinet body and cabinet door; interior of the cabinet is equipped with the main circuit breaker being located on stainless steel guide rail, main contactor, electrothermal relay and is arranged successively under upper; electrothermal relay lower part is installed by B phase current mutual inductor, the time relay and intermediate relay; horizontal guide rail is installed, installation control fuse and three current-limiting resistances on horizontal guide rail on the downside of over-voltage protector；Control contactor is installed on the right side of main contactor, frequency sensitive trheostat is installed on the downside of control contactor；Cabinet door front is equipped with control power supply indicator and three signal lamps, and ammeter is equipped in the middle part of cabinet door, and the lower part of cabinet door is equipped with start button and stop button；The utility model can solve the problems such as complex circuit existing for reduced-voltage starting control circuit, high current starting；The time relay and intermediate relay cooperating are shorted control contactor and cut off the winding of frequency sensitive trheostat, so that reduced-voltage starting is completed, it is simple and practical in structure.
Description
Technical field
The utility model relates to arrive electrical control cabinet control technology field more particularly to a kind of new type auto reduced-voltage starting
Control electric cabinet.
Background technique
Reduced-voltage starting refer to voltage is suitably reduced using starting device after be added on the stator winding of motor and open
After dynamic operating, then voltage is made to be restored to rated value normal operation.Voltage on motor stator winding is the specified electricity of motor
Pressure, belongs to full voltage starting, and when also referred to as directly initiating and directly initiating, starting current is generally 4 ~ 7 times of rated current.Electric current mistake
It will affect the normal operation of entire power grid greatly.Usual power supply capacity in 180KVA or more, motor capacity 7KW is below can
Using directly initiating.
It is that can reduce starting current using reduced-voltage starting, reduces due to electric current, which is, to be reduced with voltage, while turn of motor
Square is directly proportional to square line of voltage, and the detent torque that reduced-voltage starting will lead to motor is greatly lowered.Reduced-voltage starting needs thus
To start under unloaded or underloading.But there are complex circuit, high currents to start, by wiring shape for existing reduced-voltage starting control circuit
The technical problems such as formula control.
Utility model content
The utility model provides a kind of new type auto reduced-voltage starting control electric cabinet, the above problem of solution.
To solve the above problems, the technical scheme that the utility model is provided is as follows:
A kind of new type auto reduced-voltage starting control electric cabinet, the control electric cabinet includes cabinet body and cabinet door, the interior of the cabinet
Equipped with stainless steel guide rail, the stainless steel guide rail surface be fixed with main circuit breaker, main contactor, electrothermal relay and under upper according to
B phase current mutual inductor is installed in the lower part of secondary arrangement, the electrothermal relay, and the lower part of B phase current mutual inductor is installed horizontally arranged
The time relay and intermediate relay, the right side of main circuit breaker are equipped with over-voltage protector, and the downside of over-voltage protector is installed
Horizontal guide rail, from left to right successively installation control fuse and three current-limiting resistances on the horizontal guide rail；The main contactor
Right side the control contactor for being shorted and cutting off frequency sensitive trheostat is installed, frequency-sensitive variable-resistance is installed in the downside of control contactor
Device；
The front of the cabinet door is equipped with control power supply indicator and three are used to indicate electrical component work shape in cabinet body
The middle part of the signal lamp of state, respectively the first signal lamp, second signal lamp and third signal lamp, the cabinet door is equipped with for detecting
The lower part of the ammeter of electric motor operation electric current, the cabinet door is equipped with start button and stop button.
Preferably, the main circuit breaker, main contactor and electrothermal relay main contact are sequentially connected electrically the master time for constituting motor
The input terminal on road, main circuit breaker is electrically connected with alternating current L1, L2, L3, motor on the outside of the output end and control electric cabinet of electrothermal relay
Stator winding electrical connection, the output end B phase cable of electrothermal relay pass through the centre bore of B phase current mutual inductor；B phase current mutual inductance
The contact secondary side S1 of device is electrically connected with one end of ammeter, the other end of ammeter and the secondary side S2 of B phase current mutual inductor
It after contact short circuit and is grounded, and the shell protective grounding of motor；
Three winding head ends of frequency sensitive trheostat are shorted, three winding tail ends of frequency sensitive trheostat directly with the rotor of motor
Winding electrical connection, the input terminal A1 phase of control contactor and the stator winding A of motor are electrically connected, the input terminal of control contactor
B1 phase, C1 phase are electrically connected after being shorted with the stator winding C of motor, 2 phase of output terminals A, the B2 phase of control contactor be shorted after with
The stator winding B of motor is electrically connected, and the output end C2 phase of control contactor and the stator winding A of motor are electrically connected；
The output end of main circuit breaker is also electrically connected with over-voltage protector.
Preferably, three current-limiting resistances are respectively first resistor, second resistance and 3rd resistor.
Preferably, the output end of the input terminal and main circuit breaker that control fuse any one is electrically connected, stop button
One end and the one end for controlling power supply indicator are electrically connected with the output end of control fuse, control the other end of power supply indicator
Be electrically connected with alternating current zero curve, one end of start button, first normally opened contact one end of intermediate relay, intermediate relay second
Normally opened contact one end, second normally opened contact one end of main contactor, second normally-closed contact one end of intermediate relay and control
Normally opened contact one end of contactor is electrically connected with the other end of stop button, and the other end of start button successively connects by control
Normally-closed contact, the coil of main contactor of tentaculum are electrically connected with normally-closed contact one end of electrothermal relay, and the first of main contactor is often
Contact shunt is opened in the normally-closed contact series loop both ends of start button and control contactor, the normally closed touching of the first of intermediate relay
Point is connected in parallel on the coil both ends of main contactor after connecting with the coil of the time relay, the first normally opened contact of intermediate relay is another
One end is electrically connected by the coil of intermediate relay with normally-closed contact one end of electrothermal relay, the normally opened touching of the delay of the time relay
Point is connected in parallel on the first normally opened contact both ends of intermediate relay, and the second normally opened contact other end of intermediate relay connects by control
The coil of tentaculum is electrically connected with normally-closed contact one end of electrothermal relay, the normally-closed contact other end and alternating current the zero curve electricity of electrothermal relay
Connection；
The other end of second normally opened contact of main contactor successively passes through second resistance, second signal lamp and alternating current zero curve electricity
It connects using the starting operating instruction circuit as motor, the second normally-closed contact of intermediate relay successively passes through first resistor, the
One signal lamp is electrically connected with alternating current zero curve, and the normally opened contact other end of control contactor successively passes through 3rd resistor, third signal
Lamp is electrically connected using the normal operation as motor with alternating current zero curve and indicates circuit.
Preferably, the time definite value of the time relay is adjusted to 3 to 5 seconds, and the contact of intermediate relay is 4 pairs of normally opened contacts
With 4 pairs of normally-closed contacts.
Beneficial effect compared with the existing technology is that using the above scheme, the utility model can solve reduced-voltage starting control
The problems such as complex circuit existing for circuit processed, high current starting；By operating start button, main contactor can be made to put into major loop
In, the subsequent time relay and intermediate relay cooperating are shorted control contactor and cut off the winding of frequency sensitive trheostat,
It is simple and practical in structure so as to complete reduced-voltage starting.
Detailed description of the invention
Illustrate embodiment or technical solution in the prior art in order to clearer, it below will be to embodiment or the prior art
The required attached drawing used is briefly described in description, it is clear that, the accompanying drawings in the following description is only the one of utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the major loop electrical schematic diagram of the utility model motor；
Fig. 3 is the utility model motor control loop schematic diagram；
Shown in the above legend: 20, cabinet body 21, cabinet door 22, main circuit breaker 23, main contactor 24, electrothermal relay 25,
The time relay 26, intermediate relay 27, over-voltage protector 28, control contactor 29, frequency sensitive trheostat 30, electricity
Flow table.
Specific embodiment
For the ease of understanding the utility model, in the following with reference to the drawings and specific embodiments, the utility model is carried out more detailed
Thin explanation.The preferred embodiment of the utility model is given in attached drawing.But the utility model can be with many different
Form is realized, however it is not limited to this specification described embodiment.On the contrary, purpose of providing these embodiments is makes to this
The understanding of the disclosure of utility model is more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term used in this specification " fixation ", " integrated molding ",
For illustrative purposes only, the similar unit of structure is to identical label in the figure for "left", "right" and similar statement
Mark.
Unless otherwise defined, technical and scientific term all used in this specification and the skill for belonging to the utility model
The normally understood meaning of the technical staff in art field is identical.Art used in the description of the utility model in this specification
Language, which is only for the purpose of describing specific embodiments, is not intended to limitation the utility model.
As shown in Figure 1, one embodiment of the utility model is:
A kind of new type auto reduced-voltage starting control electric cabinet, the control electric cabinet includes cabinet body 20 and cabinet door 21, the cabinet body
20 inside are equipped with stainless steel guide rail, and the stainless steel guide rail surface is fixed with main circuit breaker 22, main contactor 23, electrothermal relay 24
And be arranged successively under upper, B phase current mutual inductor, the lower part of B phase current mutual inductor are installed in the lower part of the electrothermal relay 24
The horizontally arranged time relay 25 and intermediate relay 26 are installed, the right side of main circuit breaker 22 is equipped with over-voltage protector 27,
Horizontal guide rail is installed in the downside of over-voltage protector 27, from left to right successively installs control fuse and three on the horizontal guide rail
A current-limiting resistance；The control contactor 28 for being shorted and cutting off frequency sensitive trheostat 29 is installed on the right side of the main contactor 23,
The downside of control contactor 28 is installed by frequency sensitive trheostat 29；
The front of the cabinet door 21 is equipped with control power supply indicator and three are used to indicate electrical component work in cabinet body 20
Make the signal lamp of state, respectively the first signal lamp, second signal lamp and third signal lamp, the middle part of the cabinet door 21, which is equipped with, to be used
Start button and stop button are equipped in the lower part of the ammeter 30 of detection electric motor operation electric current, the cabinet door 21.
Preferably, as shown in Fig. 2, the main circuit breaker QF, main contactor KM1 and electrothermal relay FR main contact are successively electrically connected
The major loop for constituting motor is connect, the input terminal of main circuit breaker QF is electrically connected with alternating current L1, L2, L3, the output end of electrothermal relay FR
It is electrically connected with the stator winding of motor M on the outside of control electric cabinet, the output end B phase cable of electrothermal relay FR passes through the mutual inductance of B phase current
The centre bore of device TA；The contact secondary side S1 of B phase current mutual inductor TA is electrically connected with one end of ammeter PA, and ammeter PA's is another
It after the secondary side S2 contact short circuit of one end and B phase current mutual inductor TA and is grounded, and the shell protective grounding of motor M；
Three winding head ends of frequency sensitive trheostat RF are shorted, three winding tail ends of frequency sensitive trheostat RF directly with motor M
Rotor windings electrical connection, the input terminal A1 phase of control contactor KM2 is electrically connected with the stator winding A of motor M, and control contacts
Input terminal B1 phase, the C1 phase of device KM2 is electrically connected after being shorted with the stator winding C of motor M, the output end of control contactor KM2
A2 phase, B2 phase are electrically connected after being shorted with the stator winding B of motor M, the output end C2 phase of control contactor KM2 and motor M's
Stator winding A is electrically connected；
The output end of main circuit breaker QF is also electrically connected with over-voltage protector.
Preferably, three current-limiting resistances are respectively first resistor R1, second resistance R2 and 3rd resistor R3.
Preferably, as shown in figure 3, any phase of output end of the input terminal and main circuit breaker QF of control fuse FU is electrically connected
It connects, one end of stop button SB1 and the one end for controlling power supply indicator GN are electrically connected with the output end of control fuse FU, are controlled
The other end of power supply indicator GN processed is electrically connected with alternating current zero curve N, one end of start button SB2, intermediate relay KA first
Normally opened contact one end, second normally opened contact one end of intermediate relay KA, main contactor KM1 second normally opened contact one end, in
Between relay KA second normally-closed contact one end and control contactor KM2 normally opened contact one end with stop button SB1's
Other end electrical connection, the other end of start button SB2 successively pass through the normally-closed contact of control contactor KM2, main contactor KM1
Coil is electrically connected with normally-closed contact one end of electrothermal relay FR, and the first normally opened contact of main contactor KM1 is connected in parallel on start button
The normally-closed contact series loop both ends of SB2 and control contactor KM2, the first normally-closed contact and time relay of intermediate relay KA
The coil both ends of main contactor KM1, the first normally opened contact other end of intermediate relay KA are connected in parallel on after the coil series connection of device KT
It is electrically connected by the coil of intermediate relay KA with normally-closed contact one end of electrothermal relay FR, the delay of time relay KT is normally opened
Contact shunt passes through in the first normally opened contact both ends of intermediate relay KA, the second normally opened contact other end of intermediate relay KA
The coil of control contactor KM2 is electrically connected with normally-closed contact one end of electrothermal relay FR, and the normally-closed contact of electrothermal relay FR is another
End is electrically connected with alternating current zero curve N；
The other end of the second normally opened contact of main contactor KM1 successively passes through second resistance R2, the city second signal DengHL2Yu
Electrical zero line N electrical connection is successively passed through using the starting operating instruction circuit as motor, the second normally-closed contact of intermediate relay KA
First resistor R1, the first signal lamp HL1 are electrically connected with alternating current zero curve N, and the normally opened contact other end of control contactor KM2 successively passes through
3rd resistor R3, third signal lamp HL3 is crossed to be electrically connected with alternating current zero curve N using the normal operation instruction circuit as motor.
Preferably, the time definite value of time relay KT is adjusted to 3 to 5 seconds, and the contact of intermediate relay KA is 4 pairs normally opened
Contact and 4 pairs of normally-closed contacts.
Working principle:
Circuit power transmission: first closing main circuit breaker, is closing control fuse；
Electric machine step-down starting operation: pressing start button, the coil of main contactor and the time relay simultaneously it is electric, master connects
First normally opened contact of tentaculum is closed self-insurance, while time relay bypass is kept, and the coil energized action of main contactor, master connects
Three main contacts of tentaculum are closed at, and connect the power supply of the stator winding of motor, the winding intervention motor of frequency sensitive trheostat
In rotor loop, frequency sensitive trheostat is devoted oneself to work, and motor starts automatic operating；Coil energized action (the adjusting of the time relay
Time 3S), the delay normally opened contact of time relay closure, the coil energized action of intermediate relay, the of intermediate relay
Two normally opened contacts closure, three main contacts of the coil energized action of control contactor, control contactor are closed at, will be frequently quick
Rheostat is shorted and cuts off, and motor enters normal operating condition；First normally-closed contact of intermediate relay disconnects, the time relay
Coil blackout release, the delay normally opened contact of closure, which resets, to be disconnected, and the first signal lamp goes out, and the time relay is completed to be shorted frequency quick
Rheostatic instruction, motor operate normally；Third signal lamp is bright, indicates that frequency sensitive trheostat winding has been cut off, and the of main contactor
Two normally opened contacts closure, second signal lamp obtain electric bright, expression electric motor starting operating；
When shutdown, stop button is pressed, the normally-closed contact of stop button disconnects, and cuts off the wire loop of main contactor, main
The coil blackout of contactor discharges, and three main contacts simultaneously switch off, and motor is detached from the AC power source of three-phase 380V, stops operating.
Beneficial effect compared with the existing technology is that using the above scheme, the utility model can solve reduced-voltage starting control
The problems such as complex circuit existing for circuit processed, high current starting；By operating start button, main contactor can be made to put into major loop
In, the subsequent time relay and intermediate relay cooperating are shorted control contactor and cut off the winding of frequency sensitive trheostat,
It is simple and practical in structure so as to complete reduced-voltage starting.
It should be noted that above-mentioned each technical characteristic continues to be combined with each other, the various embodiments not being enumerated above are formed,
It is accordingly to be regarded as the range of the utility model specification record；Also, it for those of ordinary skills, can be according to above stating
It is bright to be improved or converted, and all these modifications and variations all should belong to the protection model of the appended claims for the utility model
It encloses.
Claims (5)
1. a kind of new type auto reduced-voltage starting controls electric cabinet, it is characterised in that: the control electric cabinet includes cabinet body and cabinet door, described
Interior of the cabinet be equipped with stainless steel guide rail, the stainless steel guide rail surface be fixed with main circuit breaker, main contactor, electrothermal relay and from
It is arranged successively under upper, B phase current mutual inductor is installed in the lower part of the electrothermal relay, and water is installed in the lower part of B phase current mutual inductor
The right side of the time relay and intermediate relay of flat raft column, main circuit breaker is equipped with over-voltage protector, over-voltage protector
Horizontal guide rail is installed in downside, from left to right successively installs control fuse and three current-limiting resistances on the horizontal guide rail；It is described
The control contactor for being shorted and cutting off frequency sensitive trheostat is installed on the right side of main contactor, and frequency is installed in the downside of control contactor
Quick rheostat；
The front of the cabinet door is equipped with control power supply indicator and three are used to indicate electrical component working condition in cabinet body
Signal lamp, respectively the first signal lamp, second signal lamp and third signal lamp, the middle part of the cabinet door are equipped with electronic for detecting
The lower part of the ammeter of machine operating current, the cabinet door is equipped with start button and stop button.
2. a kind of new type auto reduced-voltage starting control electric cabinet described according to claim 1, it is characterised in that: the main open circuit
Device, main contactor and electrothermal relay main contact are sequentially connected electrically the major loop for constituting motor, the input terminal and alternating current of main circuit breaker
The output end of L1, L2, L3 electrical connection, electrothermal relay is electrically connected with the stator winding of motor on the outside of control electric cabinet, electrothermal relay
Output end B phase cable passes through the centre bore of B phase current mutual inductor；The contact secondary side S1 of B phase current mutual inductor and ammeter
One end is electrically connected, and after the other end of ammeter and the secondary side S2 contact short circuit of B phase current mutual inductor and is grounded, and motor is outer
Shell protective grounding；
Three winding head ends of frequency sensitive trheostat are shorted, three winding tail ends of frequency sensitive trheostat directly with the rotor windings of motor
Electrical connection, the input terminal A1 phase of control contactor and the stator winding A of motor are electrically connected, the input terminal B1 of control contactor
Phase, C1 phase are electrically connected after being shorted with the stator winding C of motor, 2 phase of output terminals A, the B2 phase of control contactor be shorted after with electricity
The stator winding B of machine is electrically connected, and the output end C2 phase of control contactor and the stator winding A of motor are electrically connected；
The output end of main circuit breaker is also electrically connected with over-voltage protector.
3. a kind of new type auto reduced-voltage starting control electric cabinet according to claim 2, it is characterised in that: three current-limiting resistances
Respectively first resistor, second resistance and 3rd resistor.
4. a kind of new type auto reduced-voltage starting control electric cabinet according to claim 3, it is characterised in that: control fuse
The output end of input terminal and main circuit breaker any one is electrically connected, and one end of stop button and one end of control power supply indicator are equal
It is electrically connected with the output end of control fuse, the other end for controlling power supply indicator is electrically connected with alternating current zero curve, start button
One end, first normally opened contact one end of intermediate relay, second normally opened contact one end of intermediate relay, main contactor second
Normally opened contact one end of normally opened contact one end, second normally-closed contact one end of intermediate relay and control contactor with stopping
The other end of button is electrically connected, and the other end of start button successively passes through the line of the normally-closed contact of control contactor, main contactor
Circle is electrically connected with normally-closed contact one end of electrothermal relay, and the first normally opened contact of main contactor is connected in parallel on start button and control connects
The normally-closed contact series loop both ends of tentaculum, the first normally-closed contact of intermediate relay connect with the coil of the time relay after simultaneously
The coil both ends of main contactor are associated in, the first normally opened contact other end of intermediate relay passes through the coil and heat of intermediate relay
Normally-closed contact one end of relay is electrically connected, and it is first normally opened to be connected in parallel on intermediate relay for the delay normally opened contact of the time relay
Contact both ends, the second normally opened contact other end of intermediate relay pass through the normally closed touching of the coil and electrothermal relay of control contactor
The electrical connection of point one end, the normally-closed contact other end of electrothermal relay are electrically connected with alternating current zero curve；
The other end of second normally opened contact of main contactor successively passes through second resistance, second signal lamp is electrically connected with alternating current zero curve
Using the starting operating instruction circuit as motor, the second normally-closed contact of intermediate relay successively passes through first resistor, the first letter
Signal lamp is electrically connected with alternating current zero curve, the normally opened contact other end of control contactor successively pass through 3rd resistor, third signal lamp with
The electrical connection of alternating current zero curve indicates circuit using the normal operation as motor.
5. a kind of new type auto reduced-voltage starting control electric cabinet according to claim 4, it is characterised in that: the time relay
Time definite value is adjusted to 3 to 5 seconds, and the contact of intermediate relay is 4 pairs of normally opened contacts and 4 pairs of normally-closed contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821261356.0U CN208707556U (en) | 2018-08-07 | 2018-08-07 | A kind of new type auto reduced-voltage starting control electric cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821261356.0U CN208707556U (en) | 2018-08-07 | 2018-08-07 | A kind of new type auto reduced-voltage starting control electric cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208707556U true CN208707556U (en) | 2019-04-05 |
Family
ID=65941681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821261356.0U Expired - Fee Related CN208707556U (en) | 2018-08-07 | 2018-08-07 | A kind of new type auto reduced-voltage starting control electric cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208707556U (en) |
-
2018
- 2018-08-07 CN CN201821261356.0U patent/CN208707556U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190723 Address after: 518000 First Floor, No. 54, No. 2 Road, Dalangshan Industrial Zone, Wanfeng, Shajing Street, Baoan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Shi Pu precision hardware and Plastic Co., Ltd. Address before: 518000 Wangke Passenger Creation Space, 6th Floor, Meiran Palace Building, Yannan Road, Futian District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Jing Fang Ying Technology Co., Ltd. |
|
| 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: 20190405 Termination date: 20190807 |