CN202268623U - False opening circuit of low voltage incoming line switch cabinet - Google Patents
False opening circuit of low voltage incoming line switch cabinet Download PDFInfo
- Publication number
- CN202268623U CN202268623U CN2011203687756U CN201120368775U CN202268623U CN 202268623 U CN202268623 U CN 202268623U CN 2011203687756 U CN2011203687756 U CN 2011203687756U CN 201120368775 U CN201120368775 U CN 201120368775U CN 202268623 U CN202268623 U CN 202268623U
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- switch
- knife switch
- normally opened
- opened contact
- opening
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Abstract
The utility model discloses an error opening circuit of a low voltage incoming line switch cabinet, comprising a closing branch, an opening branch, and also a pre-opening branch. The pre-opening branch comprises a pre-opening button, a pre-opening knife switch and an intermediate relay, and the pre-opening button and the pre-opening knife switch are in series connections with the coil of the intermediate relay orderly; the first normally open contacts of the intermediate relay are in parallel connections at the two ends of the pre-opening button, and the second normally open contacts of the intermediate relay are in series connections between an opening button and an opening knife switch. The false opening circuit of the low voltage incoming line switch cabinet of the utility model is suitable for various types of low voltage incoming line switches, and employs a switch element directly, so that the action is reliable, convenient and simple, and the false opening switch accidents can be reduced or avoided effectively.
Description
Technical field
The utility model relates to the service entrance switch cabinet of low-voltage distribution, relates in particular to a kind of service entrance switch cabinet mistake separating brake circuit of low-voltage distribution.
Background technology
In the distribution design of Factory Electricity Supply, the manual brake separating advantages of simple design of low pressure service entrance switch is as long as normally press opening button; Switch trips immediately, moves rapidlyer, but such is designed with a fatal defective: because the switch separating brake is simple; As easy as rolling off a log causing when separating brake, especially operating personnel only only need carry out sub-switching operation by mistake (being not need operation order in this case), if field apparatus is many; Operating personnel are easy to and can produce the mistake separating brake by the misclassification switch; Cause unnecessary artificial power outage,, will cause great property loss company especially for the electric unit of using more than the secondary.
The utility model content
The purpose of the utility model provides a kind of transformer overload protecting circuit, can prevent the mistake separating brake of low pressure service entrance switch effectively, reduces unnecessary loss of outage.
The utility model adopts following technical proposals: a kind of low pressure service entrance switch cabinet mistake separating brake circuit; Comprise combined floodgate branch road and separating brake branch road; Switch knob is connected with first normally opened contact, the closing coil of combined floodgate knife switch, closing contactor successively in the combined floodgate branch road; The normally opened contact of the time relay is connected in parallel on combined floodgate knife switch two ends; The coils from parallel connection of coils of the time relay is at the series circuit two ends of first normally opened contact and the closing coil composition of closing contactor; Be connected in parallel on the coil two ends of the time relay behind the coil of the normally-closed contact series connection closing contactor of the time relay, second normally opened contact of closing contactor is connected in parallel on the series circuit two ends of switch knob and combined floodgate knife switch composition; Opening button is connected with dividing knife switch and switching winding successively in the separating brake branch road; Also include and presort the lock branch road; Presorting the lock branch road comprises and presorts the lock button, presorts knife switch and auxiliary relay; Presort the lock button and connect successively with the coil of presorting knife switch and auxiliary relay, first normally opened contact of auxiliary relay is connected in parallel on the two ends of presorting the lock button; Second normally opened contact of auxiliary relay is connected on opening button and divides between the knife switch.
Also include and presort the lock indicating circuit, comprise the normally opened contact and the indication knife switch of indicator light, auxiliary relay, the 3rd normally opened contact of indicator light, auxiliary relay and indication knife switch are connected successively.
The normally-closed contact of described auxiliary relay is connected between switch knob and the combined floodgate knife switch.
The utility model is applicable to various types of low pressure service entrance switchs; Increased and presorted the lock branch road and presort lock indicator light branch road; Before separating brake, to make earlier and presort the connection of lock branch road, wait for that presorting the indication of lock indicator light branch road can press opening button during separating brake again, can accomplish separating brake.The design directly adopts switch element, and reliable in action, convenient and simple can reduce or avoid mistake separating brake switch failure effectively.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model.
Embodiment
As shown in Figure 1, the utility model low pressure service entrance switch cabinet mistake separating brake circuit comprises combined floodgate branch road, separating brake branch road, presorts the lock branch road and presorts the lock indicating circuit.Wherein close a floodgate switch knob SB1 in the branch road, the normally-closed contact KA1-1 of auxiliary relay, combined floodgate knife switch QF1, the first normally opened contact KO1 of closing contactor, closing coil YO connects successively; The normally opened contact KT1 of the time relay is connected in parallel on combined floodgate knife switch QF1 two ends; The coil KT of the time relay is connected in parallel on first normally opened contact KO1 of closing contactor and the series circuit two ends that closing coil YO forms; Be connected in parallel on the coil KT two ends of the time relay behind the coil KO of the normally-closed contact KT2 series connection closing contactor of the time relay, the second normally opened contact KO2 of closing contactor is connected in parallel on the normally-closed contact KA1-1 of switch knob SB1, auxiliary relay, the series circuit two ends that combined floodgate knife switch QF1 forms.The second normally opened contact KA2 of opening button SB2, auxiliary relay, branch knife switch QF3 and switching winding YR connect successively in the separating brake branch road.Presort the lock branch road and comprise that the coil KA that presorts lock button SB3, presorts knife switch QF3 and auxiliary relay connects successively, the first normally opened contact KA1 of auxiliary relay is connected in parallel on the two ends of presorting lock button SB3; Presort the 3rd normally opened contact KA3 and indication knife switch QF4 that the lock indicating circuit comprises indicator light HL, auxiliary relay, the 3rd normally opened contact KA3 of indicator light HL, auxiliary relay and indication knife switch QF4 connect successively.
The operation principle of the utility model is described below: as shown in Figure 1, when pressing switch knob SB1, the coil KO of closing contactor gets electric, and its second normally opened contact KO2 is closed, the circuit self-sustaining; The first normally opened contact KO1 of closing contactor is closed simultaneously, and closing coil YO gets electric, and switch closes a floodgate; The coil KO of closing contactor gets electric the time, the coil KT of the time relay also electric, close a floodgate after one second; Its normally-closed contact KT2 disconnection of delaying time, closing coil YO dead electricity is closed a floodgate and is accomplished; Close a floodgate after the completion, closing coil YO dead electricity is burnt coil to prevent long-time energising.When the needs separating brake, it is inoperative to press opening button SB2, and must press earlier and presort lock button SB3, the coil KA energising of auxiliary relay, its first normally opened contact KA1 is closed, the circuit self-sustaining; The 3rd normally opened contact KA3 is closed simultaneously, and HL is bright for photon board indicator light, reminds operating personnel to check whether switch needs separating brake, if confirm, at this moment presses separating brake switch S B2 separating brake.The normally-closed contact KA1-1 of series connection auxiliary relay in the closing circuit, purpose is when pressing the button SB3, to increase a tangible cut-off point in the closing circuit, guarantees that closing circuit breaks off fully in the separating brake process.
Claims (3)
1. a low pressure service entrance switch cabinet misses the separating brake circuit; Comprise combined floodgate branch road and separating brake branch road; Switch knob is connected with first normally opened contact, the closing coil of combined floodgate knife switch, closing contactor successively in the combined floodgate branch road; The normally opened contact of the time relay is connected in parallel on combined floodgate knife switch two ends; The coils from parallel connection of coils of the time relay is connected in parallel on the coil two ends of the time relay at the series circuit two ends that first normally opened contact and the closing coil of closing contactor are formed behind the coil of the normally-closed contact series connection closing contactor of the time relay, second normally opened contact of closing contactor is connected in parallel on the series circuit two ends of switch knob and combined floodgate knife switch composition; Opening button is connected with dividing knife switch and switching winding successively in the separating brake branch road; It is characterized in that: also include and presort the lock branch road; Presorting the lock branch road comprises and presorts the lock button, presorts knife switch and auxiliary relay; Presort the lock button and connect successively with the coil of presorting knife switch and auxiliary relay, first normally opened contact of auxiliary relay is connected in parallel on the two ends of presorting the lock button; Second normally opened contact of auxiliary relay is connected on opening button and divides between the knife switch.
2. low pressure service entrance switch cabinet mistake separating brake circuit according to claim 1; It is characterized in that: also include and presort the lock indicating circuit; Comprise the normally opened contact and the indication knife switch of indicator light, auxiliary relay, the 3rd normally opened contact of indicator light, auxiliary relay and indication knife switch are connected successively.
3. low pressure service entrance switch cabinet mistake separating brake circuit according to claim 2, it is characterized in that: the normally-closed contact of described auxiliary relay is connected between switch knob and the combined floodgate knife switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203687756U CN202268623U (en) | 2011-09-30 | 2011-09-30 | False opening circuit of low voltage incoming line switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203687756U CN202268623U (en) | 2011-09-30 | 2011-09-30 | False opening circuit of low voltage incoming line switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202268623U true CN202268623U (en) | 2012-06-06 |
Family
ID=46159407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203687756U Expired - Fee Related CN202268623U (en) | 2011-09-30 | 2011-09-30 | False opening circuit of low voltage incoming line switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202268623U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509667A (en) * | 2020-05-29 | 2020-08-07 | 常州佳讯光电系统工程有限公司 | Undervoltage protection control device matched with distributed photovoltaic grid-connected switch |
-
2011
- 2011-09-30 CN CN2011203687756U patent/CN202268623U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509667A (en) * | 2020-05-29 | 2020-08-07 | 常州佳讯光电系统工程有限公司 | Undervoltage protection control device matched with distributed photovoltaic grid-connected switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20160930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |