CN210490251U - AC metal enclosed switch equipment - Google Patents
AC metal enclosed switch equipment Download PDFInfo
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- CN210490251U CN210490251U CN201921540900.XU CN201921540900U CN210490251U CN 210490251 U CN210490251 U CN 210490251U CN 201921540900 U CN201921540900 U CN 201921540900U CN 210490251 U CN210490251 U CN 210490251U
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Abstract
The utility model discloses an alternating current metal-enclosed switchgear, which comprises a cabinet body, a frame and a cabinet door, wherein the frame is fixed in the cabinet body, a containing space formed by the cabinet body, the frame and the cabinet door is divided into a bus chamber, a component chamber, a cable chamber and a terminal outlet chamber by a partition plate, a first movable box body and a second movable box body are arranged in the component chamber, a vacuum circuit breaker is arranged in the first movable box body, a circuit board is arranged in the second movable box body, and a power supply module is arranged on the circuit board; the power supply module comprises a power supply source, a relay, a first diode, a first resistor, a second resistor, a first unidirectional thyristor, a NOT gate, a first triode, a first capacitor, a second unidirectional thyristor, a second diode, a third resistor, a third diode, a second triode, a second capacitor and a voltage output end. Implement the utility model discloses an exchange metal-enclosed switchgear has following beneficial effect: the safety and the reliability of the circuit are higher.
Description
Technical Field
The utility model relates to a switchgear field, in particular to exchange metal enclosed switchgear.
Background
The AC metal enclosed switchgear is mainly used for power station, power transmission of small and medium-sized generators, power substation, power distribution of industrial and mining enterprises, power receiving and power transmission of secondary power generation station of power system, starting of large-sized high-voltage motor, etc. to implement control protection, monitoring and metering. Some present exchange metal-enclosed switchgear realize preventing that vacuum circuit breaker mistake from closing the mistake and dividing through the mechanical interlock of installation on vacuum circuit breaker, improve exchange metal-enclosed switchgear's reliability. However, conventional ac metal-enclosed switchgear devices lack the corresponding circuit protection functions, such as: the safety and reliability of the circuit are poor due to the lack of the current-limiting protection function.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned defect, provide the higher interchange metal-enclosed switchgear of security and reliability of a circuit.
The utility model provides a technical scheme that its technical problem adopted is: the alternating current metal-enclosed switchgear comprises a cabinet body, a frame and a cabinet door, wherein the frame is fixed in the cabinet body, the cabinet door is hinged with the edge of the cabinet body, an accommodating space formed by the cabinet body, the frame and the cabinet door is divided into a bus chamber, a component chamber, a cable chamber and a wire outlet terminal chamber through a partition plate, a first movable box body and a second movable box body are arranged in the component chamber, a vacuum circuit breaker is arranged in the first movable box body, a mechanical interlocking device is mounted on the vacuum circuit breaker, a circuit board is arranged in the second movable box body, and a power supply module is arranged on the circuit board;
the power supply module comprises a power supply source, a relay, a first diode, a first resistor, a second resistor, a first unidirectional thyristor, a NOT gate, a first triode, a first capacitor, a second unidirectional thyristor, a second diode, a third resistor, a third diode, a second triode, a second capacitor and a voltage output end, wherein the power supply source is connected with one end of a contact of the relay, the other end of the contact of the relay is respectively connected with a cathode of the first diode, one end of the second resistor, a collector of the first triode, an anode of the second diode, one end of the third resistor, an anode of the third diode, one end of the second capacitor and the voltage output end, the anode of the first diode is respectively connected with a base electrode of the first triode, an input end of the NOT gate and one end of the first resistor, the output end of the NOT gate is connected with a control electrode of the first unidirectional thyristor, the other end of the second resistor is connected with the anode of the first unidirectional thyristor, the emitter of the first triode is connected with one end of the first capacitor, the other end of the first capacitor is connected with the control electrode of the second unidirectional thyristor, and the other end of the first resistor is respectively connected with the cathode of the first unidirectional thyristor and the cathode of the second unidirectional thyristor;
the other end of the third resistor is connected with the base of the second triode and one end of the load respectively, the emitting electrode of the second triode is connected with the cathode of the third diode, the collecting electrode of the second triode is connected with one end of the coil of the relay, the anode of the second one-way controllable silicon is connected with the cathode of the second diode, the other end of the load, the other end of the coil of the relay and the other end of the second capacitor respectively, and the type of the third diode is S-183T.
Exchange among the metal enclosed switchgear, power module still includes the fourth resistance, the one end of fourth resistance with the one end of second resistance is connected, the other end of fourth resistance with the collecting electrode of first triode is connected, the resistance of fourth resistance is 42k omega.
In the ac metal-enclosed switchgear, the power supply module further includes a fourth diode, an anode of the fourth diode is connected to an anode of the first diode, and a cathode of the fourth diode is connected to a base of the first triode.
In the ac metal-enclosed switchgear of the present invention, the fourth diode has a model of L-2733.
In the ac metal-enclosed switchgear of the present invention, the first transistor is an NPN-type transistor.
In the ac metal-enclosed switchgear of the present invention, the second triode is a PNP type triode.
Implement the utility model discloses an exchange metal-enclosed switchgear has following beneficial effect: the cabinet body, the frame and the cabinet door are arranged, an accommodating space formed by the cabinet body, the frame and the cabinet door is divided into a bus chamber, a component chamber, a cable chamber and a wire outlet terminal chamber by a partition plate, a first movable box body and a second movable box body are arranged in the component chamber, a circuit board is arranged in the second movable box body, and a power supply module is arranged on the circuit board; the power supply module comprises a power supply source, a relay, a first diode, a first resistor, a second resistor, a first unidirectional thyristor, a NOT gate, a first triode, a first capacitor, a second unidirectional thyristor, a second diode, a third resistor, a third diode, a second triode, a second capacitor and a voltage output end, wherein the third diode is used for carrying out current-limiting protection on emitter current of the second triode, so that the safety and the reliability of the circuit are high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the ac metal-enclosed switchgear of the present invention;
fig. 2 is a schematic circuit diagram of the power supply module in the embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious 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 belong to the protection scope of the present invention.
In the embodiment of the ac metal-enclosed switchgear of the present invention, a schematic structural diagram of the ac metal-enclosed switchgear is shown in fig. 1. In fig. 1, the alternating current metal-enclosed switchgear comprises a cabinet body 1, a frame and a cabinet door, wherein the frame is fixed in the cabinet body 1, the cabinet door is hinged to the edge of the cabinet body 1, and an accommodating space formed by the cabinet body 1, the frame and the cabinet door is divided into a bus chamber 3, a component chamber 4, a cable chamber 5 and a wire outlet terminal chamber 6 by a partition plate 2, so that the effects of preventing an accidental arc from reaching a live part of an adjacent functional unit from expanding and preventing solid foreign objects from entering the adjacent unit from one unit are achieved, and the power supply safety is further improved.
Be equipped with first movable box body 41 and the portable box body 42 of second in the components and parts room 4, the inside of first movable box body 41 is equipped with vacuum circuit breaker 411, installs mechanical interlock on the vacuum circuit breaker 411, realizes preventing that vacuum circuit breaker 411 mistake from closing the mistake and divides, improves exchange metal closed switch equipment's security and reliability. Specifically, the mechanical interlock device can realize a five-prevention locking function, i.e., prevent the vacuum circuit breaker 411 from being closed and opened by mistake; the vacuum circuit breaker 411 is prevented from being pushed and pulled with load when in a closing state; preventing the live-engaging ground switch; power transmission is prevented when the grounding switch is switched on; prevent to miss and go into electrified interval, have reliable machinery and prevent mistake operating function. The first movable box 41 and the second movable box 42 are movable, so that subsequent arrangement and operation are facilitated, and daily maintenance and repair are facilitated.
A circuit board 421 is arranged in the second movable box 42, and a power supply module is arranged on the circuit board 421.
Fig. 2 is a schematic circuit diagram of a power supply module in this embodiment, in fig. 2, the power supply module includes a power supply VCC, a relay, a first diode D1, a first resistor R1, a second resistor R2, a first unidirectional thyristor VS1, a not-gate JU1, a first triode Q1, a first capacitor C1, a second unidirectional thyristor VS2, a second diode D2, a third resistor R3, a third diode D3, a second triode Q2, a second capacitor C2, and a voltage output Vo, where the power supply VCC is connected to one end of a contact K-1 of the relay, the other end of the contact K-1 of the relay is connected to a cathode of the first diode D1, one end of the second resistor R84, a collector of the first triode Q1, an anode of the second diode D2, one end of the third resistor R3, an anode of the third diode D3, one end of the second capacitor C5, and the voltage output of the first diode D583724, and a base of the first triode Q57323 are connected to one end of the first diode D5857324, The input end of the not gate U1 is connected with one end of a first resistor R1, the output end of the not gate U1 is connected with the control electrode of a first unidirectional thyristor VS1, the other end of a second resistor R2 is connected with the anode of a first unidirectional thyristor VS1, the emitter of a first triode Q1 is connected with one end of a first capacitor C1, the other end of the first capacitor C1 is connected with the control electrode of a second unidirectional thyristor VS2, and the other end of the first resistor R1 is connected with the cathode of the first unidirectional thyristor VS1 and the cathode of the second unidirectional thyristor VS2 respectively.
The other end of the third resistor R3 is connected with the base of the second triode Q2 and one end of the load P respectively, the emitter of the second triode Q2 is connected with the cathode of the third diode D3, the collector of the second triode Q2 is connected with one end of the coil K of the relay, and the anode of the second one-way thyristor VS2 is connected with the cathode of the second diode D2, the other end of the load P, the other end of the coil K of the relay and the other end of the second capacitor C2 respectively.
The third diode D3 is a current limiting diode, and is used for current limiting protection of the emitter current of the second transistor Q2. The current limiting protection principle is as follows: when the emitter current of the second triode Q2 is large, the third diode D3 can reduce the emitter current of the second triode Q2 to keep the second triode Q2 in a normal working state, so that the elements in the circuit are not burnt out due to too large current, and the safety and reliability of the circuit are improved. It should be noted that in the present embodiment, the model number of the third diode D3 is S-183T. Of course, in practical applications, the third diode D3 may also be another type of diode with similar functions.
Because the relay is a normally closed contact relay, the contact K-1 is normally closed, when the voltage of the input power supply VCC is above the rated value, the first diode D1 is broken down and conducted, so that the first triode Q1 is conducted, the high level output by the emitter of the first triode Q1 provides a trigger level for the control electrode of the second unidirectional thyristor VS2 through the first capacitor C1, so that the second unidirectional thyristor VS2 is conducted, at this time, the input end of the not gate U1 is at the high level, and the output end thereof is at the low level, so that the first unidirectional thyristor VS1 is not conducted, and the electrical circuit between the power supply VCC and the load P is conducted. At this time, the second diode D2 lights up.
When the terminal voltage of the storage battery is reduced to be below a rated value, the first diode D1 is cut off, the first triode Q1 is reversely biased to be cut off, the input end of the NOT gate U1 is converted into high level, the first unidirectional thyristor VS1 is conducted, the first unidirectional thyristor VS2 is cut off due to the fact that reverse voltage is instantly applied to the cathode, and a power supply path between the power supply VCC and the load P is cut off. At the same time the second diode D2 extinguishes, indicating that the voltage of the power supply VCC is insufficient.
When the load P is normal, because the base voltage of the second triode Q2 is high, according to the conduction principle, the second triode Q2 is not conducted at the moment, the relay is not powered on, when the load P is in a short-circuit condition, because the base of the second triode Q2 is short-circuited, the voltage of the second triode Q2 is reduced, the second triode Q2 is accordingly conducted, the relay is powered on, the contact K-1 of the relay is disconnected, the purpose of short-circuit protection is achieved, and the charge and discharge function of the second capacitor C2 can prevent the relay from repeatedly acting.
In this embodiment, the first transistor Q1 is an NPN transistor. The second transistor Q2 is a PNP transistor. Certainly, in practical applications, the first transistor Q1 may also be a PNP transistor, and the second transistor Q2 may also be an NPN transistor, but the structure of the circuit is also changed accordingly.
In this embodiment, the power supply module further includes a fourth resistor R4, one end of the fourth resistor R4 is connected to one end of the second resistor R2, and the other end of the fourth resistor R4 is connected to a collector of the first transistor Q1. The fourth resistor R4 is a current limiting resistor, and is used for current limiting protection of the collector current of the first transistor Q1. The current limiting protection principle is as follows: when the collector current of the first triode Q1 is large, the fourth resistor R4 can reduce the collector current of the first triode Q1 to keep the first triode Q1 in a normal operating state, so that the device in the circuit is not burned out due to too large current, and the safety and reliability of the circuit are further enhanced. It should be noted that, in the present embodiment, the resistance of the fourth resistor R4 is 42k Ω. Of course, in practical applications, the resistance of the fourth resistor R4 may be adjusted according to specific situations, that is, the resistance of the fourth resistor R4 may be increased or decreased according to specific situations.
In this embodiment, the power supply module further includes a fourth diode D4, an anode of the fourth diode D4 is connected to the anode of the first diode D1, and a cathode of the fourth diode D4 is connected to the base of the first transistor Q1. The fourth diode D4 is a current limiting diode for current limiting protection of the base current of the first transistor Q1. The current limiting protection principle is as follows: when the base current of the first transistor Q1 is large, the base current of the first transistor Q1 can be reduced by the fourth diode D4 to keep the first transistor Q1 in a normal working state, so that the device in the circuit is not burned out due to the large current, and the safety and reliability of the circuit are further enhanced. It should be noted that in the present embodiment, the fourth diode D4 has a model number L-2733. Of course, in practical applications, the fourth diode D4 may also be another type of diode with similar functions.
In short, in this embodiment, the current-limiting diode is disposed in the power supply module, so that the safety and reliability of the circuit are high.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An alternating current metal-enclosed switchgear is characterized by comprising a cabinet body, a frame and a cabinet door, wherein the frame is fixed in the cabinet body, the cabinet door is hinged to the edge of the cabinet body, an accommodating space formed by the cabinet body, the frame and the cabinet door is divided into a bus chamber, a component chamber, a cable chamber and a wire outlet terminal chamber through partition plates, a first movable box body and a second movable box body are arranged in the component chamber, a vacuum circuit breaker is arranged in the first movable box body, a mechanical interlocking device is installed on the vacuum circuit breaker, a circuit board is arranged in the second movable box body, and a power supply module is arranged on the circuit board;
the power supply module comprises a power supply source, a relay, a first diode, a first resistor, a second resistor, a first unidirectional thyristor, a NOT gate, a first triode, a first capacitor, a second unidirectional thyristor, a second diode, a third resistor, a third diode, a second triode, a second capacitor and a voltage output end, wherein the power supply source is connected with one end of a contact of the relay, the other end of the contact of the relay is respectively connected with a cathode of the first diode, one end of the second resistor, a collector of the first triode, an anode of the second diode, one end of the third resistor, an anode of the third diode, one end of the second capacitor and the voltage output end, the anode of the first diode is respectively connected with a base electrode of the first triode, an input end of the NOT gate and one end of the first resistor, the output end of the NOT gate is connected with a control electrode of the first unidirectional thyristor, the other end of the second resistor is connected with the anode of the first unidirectional thyristor, the emitter of the first triode is connected with one end of the first capacitor, the other end of the first capacitor is connected with the control electrode of the second unidirectional thyristor, and the other end of the first resistor is respectively connected with the cathode of the first unidirectional thyristor and the cathode of the second unidirectional thyristor;
the other end of the third resistor is connected with the base of the second triode and one end of the load respectively, the emitting electrode of the second triode is connected with the cathode of the third diode, the collecting electrode of the second triode is connected with one end of the coil of the relay, the anode of the second one-way controllable silicon is connected with the cathode of the second diode, the other end of the load, the other end of the coil of the relay and the other end of the second capacitor respectively, and the type of the third diode is S-183T.
2. An ac metal enclosed switchgear according to claim 1, wherein the power supply module further comprises a fourth resistor, one end of the fourth resistor is connected to one end of the second resistor, the other end of the fourth resistor is connected to the collector of the first transistor, and the resistance of the fourth resistor is 42k Ω.
3. An AC metal enclosed switchgear according to claim 2, wherein said power supply module further comprises a fourth diode, the anode of said fourth diode being connected to the anode of said first diode, the cathode of said fourth diode being connected to the base of said first triode.
4. An AC metal enclosed switchgear according to claim 3, wherein said fourth diode is of type L-2733.
5. An AC metal enclosed switching device according to any one of claims 1 to 4, wherein said first transistor is an NPN transistor.
6. An AC metal enclosed switching device according to any one of claims 1 to 4, wherein said second transistor is a PNP type transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921540900.XU CN210490251U (en) | 2019-09-17 | 2019-09-17 | AC metal enclosed switch equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921540900.XU CN210490251U (en) | 2019-09-17 | 2019-09-17 | AC metal enclosed switch equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210490251U true CN210490251U (en) | 2020-05-08 |
Family
ID=70540349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921540900.XU Expired - Fee Related CN210490251U (en) | 2019-09-17 | 2019-09-17 | AC metal enclosed switch equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210490251U (en) |
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2019
- 2019-09-17 CN CN201921540900.XU patent/CN210490251U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| 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: 20200508 Termination date: 20210917 |