CN211456693U - Power supply reverse connection prevention device - Google Patents
Power supply reverse connection prevention device Download PDFInfo
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- CN211456693U CN211456693U CN201922236825.4U CN201922236825U CN211456693U CN 211456693 U CN211456693 U CN 211456693U CN 201922236825 U CN201922236825 U CN 201922236825U CN 211456693 U CN211456693 U CN 211456693U
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Abstract
The utility model discloses a power supply reverse connection prevention device, which is arranged in a circuit protection box and comprises a change-over switch, a first diode and a protection outlet relay, wherein two ends of a normally open contact of the protection outlet relay are respectively connected with a 19 interface and a 18 interface of the circuit protection box, a fault indicator lamp is arranged between the 18 interface and the 11 interface of the circuit protection box, the 11 interface of the circuit protection box is connected with a 10 interface of the circuit protection box through the first diode, the 10 interface of the circuit protection box is sequentially connected with a power supply anode through the change-over switch and a starting switch, and the 11 interface of the circuit protection box is connected with a power supply cathode through a coil of a first trip keeping relay; when the normally open contact of the protection outlet relay acts, the positive power supply is connected with the negative power supply through the normally open contact of the protection outlet relay, the fault indicator lamp and the coil of the first tripping holding relay. The utility model discloses can avoid manual switch live working, prevent the occurence of failure, the equipment safety and stability of guarantee circuit protection incasement moves.
Description
Technical Field
The utility model relates to a power protection equipment field, concretely relates to reverse-connection preventing device for power supply.
Background
In the microcomputer relay protection device, when equipment failure is detected, a relay in the relay protection device trips, voltage exists on a manual switch after the relay trips, and if a power supply direction connection loop is not arranged on a manual opening switch, personal safety of a worker is threatened when the manual opening switch is manually closed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a reverse-connection preventing device of power can avoid manual switch live-line operation, prevents the accident, can avoid the power polarity mistake of inserting simultaneously, and the equipment safety and stability in the guarantee circuit protection incasement moves.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a power supply reverse connection prevention device is arranged in a circuit protection box and comprises a change-over switch, a first diode and a protection outlet relay, wherein a coil of the protection outlet relay is arranged on a main control device, two ends of a normally open contact of the protection outlet relay are respectively connected with a 19 interface and a 18 interface of the circuit protection box, a fault indicator lamp is arranged between the 18 interface and the 11 interface of the circuit protection box, the 11 interface of the circuit protection box is connected with a 10 interface of the circuit protection box through the first diode, the 10 interface of the circuit protection box is sequentially connected with a positive electrode of a power supply through a 4 th wiring point, a 3 rd wiring point, a 2 nd wiring point and a 1 st wiring point of the change-over switch, the 11 interface of the circuit protection box is also connected with a 14 interface of the circuit protection box through a coil of a first trip keeping relay, and the 14 interface of the circuit protection box is connected with a negative; when the normally open contact of the protection outlet relay acts, the positive power supply is connected to the negative power supply through the 19 interface → the normally open contact of the protection outlet relay → the 18 interface → the fault indicator lamp → the 11 interface → the coil of the first trip hold relay → the 14 interface, and the fault indicator lamp lights.
Preferably, two ends of the coil of the first trip holding relay are connected in parallel with a first rectifying and filtering circuit, the first rectifying and filtering circuit comprises a first rectifying bridge consisting of a second diode, a third diode, a sixth diode and a seventh diode, a first filter capacitor, a fourth diode and a fifth diode, the fourth diode is connected in series with the fifth diode to form a first clamping/freewheeling diode, the coil of the first trip holding relay is connected in parallel with the first filter capacitor, the first rectifying bridge and the first clamping/freewheeling diode in sequence to form a first rectifying and filtering circuit, one end of the first rectifying and filtering circuit is connected with an 11 interface of the circuit protection box, the other end of the first rectifying and filtering circuit is connected with a 14 interface of the circuit protection box, and a normally open contact of the first trip holding relay is arranged on a circuit of the second trip holding relay.
Preferably, two ends of the coil of the second trip holding relay are connected in parallel with a second rectifying and filtering circuit, the second rectifying and filtering circuit comprises a second rectifying bridge consisting of an eighth diode, a ninth diode, a twelfth diode and a thirteenth diode, a second filtering capacitor, a twelfth diode and an eleventh diode, the twelfth diode is connected in series with the eleventh diode to form a second clamping/freewheeling diode, the coil of the second trip holding relay is connected in parallel with the second filtering capacitor, the second rectifying bridge and the second clamping/freewheeling diode in sequence to form a second rectifying and filtering circuit, one end of the second rectifying and filtering circuit is connected with the 9 interface of the circuit protection box, the 9 interface of the circuit protection box is connected with the positive pole of the power supply through the 2 nd connection point, the 1 st connection point, the 2 nd connection point and the 1 st connection point of the change-over switch in sequence, the other end of the second rectifying and filtering circuit is connected with an 8 interface of the circuit protection box through a normally open contact of the first tripping holding relay, the 8 interface of the circuit protection box is connected with a power supply cathode, and the normally open contact of the second tripping holding relay is arranged on a circuit of the closing protection relay.
Preferably, the two ends of the coil of the closing holding relay are connected in parallel with a third rectifying and filtering circuit, the third rectifying and filtering circuit comprises a third rectifying bridge consisting of a fourteenth diode, a fifteenth diode, a seventeenth diode and an eighteenth diode, a third filtering capacitor and a sixteenth diode, the sixteenth diode is a third clamping/freewheeling diode, the coil of the closing holding relay is sequentially connected in parallel with the third rectifying bridge, the third filtering capacitor and the sixteenth diode to form a third rectifying and filtering circuit, one end of the third rectifying and filtering circuit is sequentially connected with the 9 interface of the line protection box through a first resistor and a second resistor, the second resistor is further connected with the positive electrode of the power supply through the normally open contact of the closing holding relay, the two ends of the normally open contact of the closing holding relay are connected in parallel with the normally open contact of a second tripping holding relay, and the other end of the third rectifying and filtering circuit is connected with the 13 interface of the line protection box through the normally closed contact of the second tripping holding relay And the 13 interfaces of the circuit protection box are connected with the cathode of the power supply.
Preferably, first rectification filter circuit is still through the 7 interfaces of tripping relay's normally open contact interconnecting link guard box, and the 7 interfaces of circuit guard box are anodal through change over switch's the 4 th binding post, the 3 rd binding post, starting switch's the 2 nd binding post, the 1 st binding post connection power in proper order, second rectification filter circuit and third rectification filter circuit are all through the 7 interfaces of closing relay's normally open contact interconnecting link guard box, and closing relay and tripping relay all set up in the cubical switchboard.
Preferably, the 13 interfaces of the circuit protection box are sequentially connected with the negative electrode of the power supply through the circuit breaker and the closing contactor, and the 14 interfaces of the circuit protection box are sequentially connected with the negative electrode of the power supply through the circuit breaker and the tripping coil.
The utility model displays the fault information by arranging the outlet protective relay and the fault indicator lamp, and avoids the safety accident caused by the live operation of the manual switch by arranging the diode on the circuit of the manual switch; the input alternating current or direct current is converted into stable direct current to supply power to the relays by connecting the rectifying and filtering circuits in parallel on the coils of the relays, so that the relays can be normally started without identifying the types of the accessed power supplies, and the stable operation of the relays is ensured.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
As shown in figure 1, the utility model discloses a power supply reverse connection prevention device, which is arranged in a line protection box, a plurality of interfaces are arranged on the line protection box, the device also comprises a change-over switch KK, a first diode D1 and a protection exit relay BCJ, a coil of the protection exit relay BCJ is arranged on a main control device, two ends of a normally open contact of the protection exit relay BCJ are respectively connected with a 19 interface and an 18 interface of the line protection box, a fault indicator lamp 1LP is arranged between the 18 interface and the 11 interface of the line protection box, the 11 interface of the line protection box is connected with a 10 interface of the line protection box through a first diode D1, the 10 interface of the line protection box is sequentially connected with a 14 interface of the line protection box through a 4 th wiring point, a 3 rd wiring point of the change-over switch KK, a 2 nd wiring point and a 1 st wiring point of a starting switch QK, the 11 interface of the line protection box is also connected with a 14 interface of the line protection box through a coil of, and the 14 interfaces of the circuit protection box are sequentially connected with the negative electrode of the power supply through a breaker QF and a tripping coil TQ.
If the main controller detects an external electrical fault, the protection outlet relay BCJ is started, the normally open contact of the protection outlet relay BCJ is closed, the positive power supply is connected with the negative power supply through the 19 interface → the normally open contact of the protection outlet relay BCJ → the 18 interface → the fault indicator lamp 1LP → the 11 interface → the coil of the first trip holding relay TBJ1 → the 14 interface, the fault indicator lamp 1LP is lightened, and after the 1LP is lightened, a fault is displayed, and then the change-over switch KK is manually operated; the first diode D1 is used for preventing the circuit from being reversely connected, if the circuit is not provided with the first diode D1, the positive power supply can reach the 4 th wiring point of the change-over switch KK, the change-over switch KK is a manual opening switch and needs manual operation, the physical health of an operator can be harmed during manual opening, and after the first diode D1 is added, the positive power supply cannot reach the 4 th wiring end of the change-over switch KK, so that the safety of the operator is ensured; in addition, D1 is not turned on in the reverse direction when the positive and negative polarities of the power supply are reversed, so that the circuit cannot form an effective circuit, and the switch provided in the device does not operate, thereby preventing a polarity error of the dc power supply connected to the line of the first trip hold relay TBJ 1.
The two ends of the coil of the first trip hold relay TBJ1 are connected in parallel with a first rectifying and filtering circuit, the first rectifying and filtering circuit comprises a first rectifying bridge composed of a second diode D2, a third diode D3, a sixth diode D6 and a seventh diode D7, a first filtering capacitor C1, a fourth diode D4 and a fifth diode D5, the fourth diode D4 and the fifth diode D5 are connected in series to form a first clamping/freewheeling diode, the coil of the first trip hold relay TBJ1 is connected in parallel with the first filtering capacitor C1, the first rectifying bridge and the first clamping/freewheeling diode in sequence, a first rectifying and filtering circuit is formed, one end of the first rectifying and filtering circuit is connected with the 11 interface of the circuit protection box, the other end of the first rectifying and filtering circuit is connected with the 14 interface of the circuit protection box, and the normally open contact of the first tripping holding relay TBJ1 is arranged on the circuit of the second tripping holding relay TBJ 2.
A second rectifying and filtering circuit is connected in parallel with two ends of the coil of the second trip hold relay TBJ2, the second rectifying and filtering circuit includes a fourth rectifying bridge composed of an eighth diode D8, a ninth diode D9, a twelfth diode D12 and a thirteenth diode D13, a second filtering capacitor C2, a twelfth diode D10 and an eleventh diode D11, the twelfth diode D10 is connected in series with the eleventh diode D11 to form a second clamping/freewheeling diode, the coil of the second trip hold relay TBJ2 is connected in parallel with the second filtering capacitor C2, the second rectifying bridge and the second clamping/freewheeling diode in turn to form a second rectifying and filtering circuit, one end of the second rectifying and filtering circuit is connected with the 9 port of the line protection box, the 9 port of the line protection box is connected with the positive pole of the power supply through the 2 nd connection point, the 1 st connection point, the 2 nd connection point and the 1 st connection point of the transfer switch KK in turn, the other end of the second rectifying and filtering circuit is connected with an 8 interface of the circuit protection box through a normally open contact of the first tripping holding relay TBJ1, the 8 interface of the circuit protection box is connected with a power supply cathode, and a normally open contact of the second tripping holding relay TBJ2 is arranged on a circuit of a coil of the closing protection relay HBJ.
The two ends of the coil of the closing holding relay HBJ are connected in parallel with a third rectifying and filtering circuit, the third rectifying and filtering circuit comprises a third rectifying bridge consisting of a fourteenth diode D14, a fifteenth diode D15, a seventeenth diode D17 and an eighteenth diode D18, a third filtering capacitor C3 and a sixteenth diode D16, a sixteenth diode D16 is a third clamping/freewheeling diode, the coil of the closing holding relay HBJ is connected in parallel with the third rectifying bridge, the third filtering capacitor C3 and the sixteenth diode D16 in sequence to form a third rectifying and filtering circuit, one end of the third rectifying and filtering circuit is connected with a 9 interface of the line protection box through a first resistor R1 and a second resistor R2 in sequence, the second resistor R2 is also connected with the positive pole of a power supply through the normally open contact of the closing holding relay HBJ, and the two ends of the normally open contact of the closing holding relay HBJ are connected in parallel with the normally open contact of a second tripping holding relay TBJ2, the other end of the third rectifying and filtering circuit is connected with the 13 interface of the circuit protection box through the normally closed contact of the second tripping holding relay TBJ2, and the 13 interface of the circuit protection box is connected with the negative electrode of the power supply through the breaker QF and the contactor HC in sequence.
In addition, first rectification filter circuit is still through the 7 interfaces of tripping relay TJ's normally open contact interconnecting link guard box, and the 7 interfaces of circuit guard box are anodal through starting switch QK's the 3 rd junction and the 4 th junction connection power in proper order, and second rectification filter circuit and third rectification filter circuit are all through the 7 interfaces of closing relay HJ's normally open contact interconnecting link guard box, and closing relay HJ and tripping relay TJ all set up in the cubical switchboard.
The manual switch KK is a 3-bit switch, 1-2 and 3-4 are in a normally open state during normal work, and can be closed only when manual brake opening or closing is needed, and the manual switch KK is restored to the normally open state when the brake opening or closing action is finished; the 1-2 connection point and the 3-4 connection point of the starting switch QK switch are mutually locked, if the 1-2 is conducted, the 3-4 is in an open state, and vice versa.
Taking the third rectifying and filtering circuit as an example, if a direct-current operating power supply is externally connected, the first rectifying bridge directly supplies power to the closing protection relay HBJ, the sixteenth diode D16 is used as a clamping diode to fix the voltage to direct current 1.5V, so that the closing protection relay HBJ can be started, and after the direct-current power supply disappears, the sixteenth diode D16 is used as a freewheeling diode to prevent high voltage from being generated at two ends of a coil of the closing protection relay HBJ and damaging the relay; if an alternating current operating power supply is externally connected, alternating current is rectified into direct current through a third rectifier bridge, irregular peak waves are filtered through a third filter capacitor C3, and after stable direct current waveforms are formed, the stable direct current waveforms are supplied to a switching-on protection relay HBJ for use, and the switching-on protection relay HBJ can be stably started. The working processes of other rectifying and filtering circuits are the same, so that each relay can stably work without identifying the type of an external intervention power supply.
The utility model discloses can avoid manual switch live working, prevent the occurence of failure, can prevent the polarity error of the DC power supply who inserts simultaneously, the equipment safety and stability in the guarantee circuit protection incasement moves.
Claims (6)
1. The utility model provides a power reverse-connection preventing device, sets up in the circuit protection incasement which characterized in that: the protection system comprises a change-over switch, a first diode and a protection outlet relay, wherein a coil of the protection outlet relay is arranged on a main control device, two ends of a normally open contact of the protection outlet relay are respectively connected with a 19 interface and a 18 interface of a circuit protection box, a fault indicator lamp is arranged between the 18 interface and a 11 interface of the circuit protection box, the 11 interface of the circuit protection box is connected with a 10 interface of the circuit protection box through the first diode, the 10 interface of the circuit protection box is sequentially connected with a positive electrode of a power supply through a 4 th wiring point, a 3 rd wiring point, a 2 nd wiring point and a 1 st wiring point of the change-over switch, the 11 interface of the circuit protection box is also connected with a 14 interface of the circuit protection box through a coil of a first trip holding relay, and the 14 interface of the circuit protection box is connected with a; when the normally open contact of the protection outlet relay acts, the positive power supply is connected with the negative power supply through the interface 19, the normally open contact of the protection outlet relay, the interface 18, the fault indicator lamp, the interface 11, the coil of the first tripping holding relay and the interface 14, and the fault indicator lamp is lightened.
2. A power supply reverse-connection preventing device as claimed in claim 1, wherein: the two ends of the coil of the first tripping holding relay are connected in parallel with a first rectifying and filtering circuit, the first rectifying and filtering circuit comprises a first rectifying bridge consisting of a second diode, a third diode, a sixth diode and a seventh diode, a first filter capacitor, a fourth diode and a fifth diode, the fourth diode is connected in series with the fifth diode to form a first clamping/freewheeling diode, the coil of the first tripping holding relay is sequentially connected in parallel with the first filter capacitor, the first rectifying bridge and the first clamping/freewheeling diode to form a first rectifying and filtering circuit, one end of the first rectifying and filtering circuit is connected with an 11 interface of the circuit protection box, the other end of the first rectifying and filtering circuit is connected with a 14 interface of the circuit protection box, and a normally open contact of the first tripping holding relay is arranged on a circuit of the second tripping holding relay.
3. A power supply reverse-connection preventing device as claimed in claim 2, wherein: the two ends of the coil of the second trip holding relay are connected in parallel with a second rectifying and filtering circuit, the second rectifying and filtering circuit comprises a second rectifying bridge consisting of an eighth diode, a ninth diode, a twelfth diode and a thirteenth diode, a second filtering capacitor, a twelfth diode and an eleventh diode, the twelfth diode and the eleventh diode are connected in series to form a second clamp voltage/fly-wheel diode, the coil of the second trip holding relay is sequentially connected in parallel with the second filtering capacitor, the second rectifying bridge and the second clamp voltage/fly-wheel diode to form a second rectifying and filtering circuit, one end of the second rectifying and filtering circuit is connected with a 9 interface of the circuit protection box, the 9 interface of the circuit protection box is sequentially connected with a power supply anode through a 2 nd wiring point, a 1 st wiring point, a 2 nd wiring point and a 1 st wiring point of the change-over switch, and the other end of the second rectifying and filtering circuit is connected with a normally open contact of the circuit protection box through a normally open contact of the first trip holding relay The 8 interfaces are connected, the 8 interfaces of the circuit protection box are connected with the negative electrode of a power supply, and the normally open contact of the second tripping holding relay is arranged on the circuit of the closing holding relay.
4. A power supply reverse-connection preventing device according to claim 3, wherein: the two ends of the coil of the closing holding relay are connected in parallel with a third rectifying and filtering circuit, the third rectifying and filtering circuit comprises a third rectifying bridge consisting of a fourteenth diode, a fifteenth diode, a seventeenth diode and an eighteenth diode, a third filtering capacitor and a sixteenth diode, the sixteenth diode is a third clamp pressing/freewheeling diode, the coil of the closing holding relay is sequentially connected in parallel with the third rectifying bridge, the third filtering capacitor and the sixteenth diode to form a third rectifying and filtering circuit, one end of the third rectifying and filtering circuit is sequentially connected with a 9 interface of the circuit protection box through a first resistor and a second resistor, the second resistor is also connected with the positive electrode of a power supply through a normally open contact of the closing holding relay, the two ends of the normally open contact of the closing holding relay are connected in parallel with a normally open contact of a second tripping holding relay, and the other end of the third rectifying and filtering circuit is connected with a 13 interface of the circuit protection box through the normally closed contact of the second holding relay, and the 13 interface of the circuit protection box is connected with the negative electrode of the power supply.
5. A power supply reverse-connection preventing device according to claim 4, wherein: first rectification filter circuit is still through the 7 interfaces of tripping relay's normally open contact interconnecting link guard box, and the 7 interfaces of circuit guard box are anodal through change over switch's the 4 th binding post, the 3 rd binding post, starting switch's the 2 nd binding post, the 1 st binding post connection power in proper order, second rectification filter circuit and third rectification filter circuit are all through the 7 interfaces of closing relay's normally open contact interconnecting link guard box, and closing relay and tripping relay all set up in the cubical switchboard.
6. A power supply reverse connection preventing device according to claim 4 or 5, wherein: and the 13 interfaces of the circuit protection box are sequentially connected with the negative electrode of the power supply through the circuit breaker and the closing contactor, and the 14 interfaces of the circuit protection box are sequentially connected with the negative electrode of the power supply through the circuit breaker and the tripping coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922236825.4U CN211456693U (en) | 2019-12-13 | 2019-12-13 | Power supply reverse connection prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922236825.4U CN211456693U (en) | 2019-12-13 | 2019-12-13 | Power supply reverse connection prevention device |
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| Publication Number | Publication Date |
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| CN211456693U true CN211456693U (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922236825.4U Active CN211456693U (en) | 2019-12-13 | 2019-12-13 | Power supply reverse connection prevention device |
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| CN (1) | CN211456693U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115311795A (en) * | 2022-10-11 | 2022-11-08 | 山东云开电力有限公司 | Alarm device of power switch cabinet |
-
2019
- 2019-12-13 CN CN201922236825.4U patent/CN211456693U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115311795A (en) * | 2022-10-11 | 2022-11-08 | 山东云开电力有限公司 | Alarm device of power switch cabinet |
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