CN210838496U - AC closed switch equipment - Google Patents
AC closed switch equipment Download PDFInfo
- Publication number
- CN210838496U CN210838496U CN201921540907.1U CN201921540907U CN210838496U CN 210838496 U CN210838496 U CN 210838496U CN 201921540907 U CN201921540907 U CN 201921540907U CN 210838496 U CN210838496 U CN 210838496U
- Authority
- CN
- China
- Prior art keywords
- resistor
- triode
- diode
- transistor
- closed switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Electronic Switches (AREA)
Abstract
The utility model discloses an AC closed switch device, which comprises a cabinet body, wherein the cabinet body comprises a cabinet door and four supporting legs, one end of the cabinet body, which is close to the supporting legs, is provided with a separation plate, a circuit board is fixed on the separation plate, and the circuit board is provided with a power module; the power supply module comprises a voltage input end, a transformer, a second diode, a voltage output end, a first resistor, a first diode, a first triode, a second resistor, a third diode, a second triode, a third resistor, a fourth triode, a fourth resistor, a fifth resistor and a first capacitor, wherein the voltage input end is connected with one end of a primary coil of the transformer, the other end of the primary coil of the transformer is connected with a collector electrode of the third triode, and a base electrode of the third triode is respectively connected with a cathode of the third diode and a collector electrode of the second triode. Implement the utility model discloses an exchange closed switch equipment 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 and seal switchgear.
Background
The AC metal closed switch equipment is a new generation medium voltage electric appliance product which is designed and developed by itself according to the domestic agricultural electricity and local network reconstruction requirements by introducing advanced technology. Through strict type tests and long-term operation examination, all technical performance indexes reach iec298 and gb3906 standards. The device has the remarkable characteristics of small volume, light weight, attractive appearance, simple and convenient operation, long service life, high parameter, no pollution, less maintenance and the like, is suitable for an alternating current 50hz and 10kv power network, and is used for receiving and distributing electric energy. The power supply part of a conventional ac-closed switchgear lacks 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 of security and reliability of a circuit and seal switchgear.
The utility model provides a technical scheme that its technical problem adopted is: the alternating current closed switch equipment comprises a cabinet body, wherein the cabinet body comprises a cabinet door and four supporting legs, a separation plate is arranged at one end, close to the supporting legs, of the cabinet body, a containing cavity is formed between the separation plate and a bottom plate of the cabinet body, a pedal in sliding fit is arranged in the containing cavity, a fixing piece matched with the pedal is further arranged in the cabinet body, the fixing piece comprises two fixing rods which are respectively arranged on two sides of the cabinet body in a clearance mode, a circuit board is fixed on the separation plate, and a power module is arranged on the circuit board;
the power supply module comprises a voltage input end, a transformer, a second diode, a voltage output end, a first resistor, a first diode, a first triode, a second resistor, a third diode, a second triode, a third resistor, a fourth triode, a fourth resistor, a fifth resistor and a first capacitor, wherein the voltage input end is connected with one end of a primary coil of the transformer, the other end of the primary coil of the transformer is connected with a collector electrode of the third triode, a base electrode of the third triode is respectively connected with a cathode of the third diode and a collector electrode of the second triode, an emitter electrode of the second triode is grounded, an emitter electrode of the third triode is respectively connected with one end of the third resistor and an emitter electrode of the fourth triode, the other end of the third resistor is grounded, and an anode of the third diode is respectively connected with a collector electrode of the first triode and one end of the first resistor, the other end of the first resistor is connected with the cathode of the first diode, the anode of the first diode is connected with the base electrode of the first triode, the emitting electrode of the first triode is respectively connected with one end of the second resistor, the base electrode of the second triode, the collecting electrode of the fourth triode and the other end of the fifth resistor, the base electrode of the fourth triode is respectively connected with one end of the fourth resistor, the other end of the fifth resistor and one end of the first capacitor, the other end of the first capacitor is grounded, one end of the secondary coil of the transformer is connected with the anode of the second diode, the cathode of the second diode is respectively connected with the voltage output end, the anode of the third diode, the other end of the second resistor and the other end of the fourth resistor, and the model of the third diode is S-562T 562.
In the ac closed switch device, the power module further includes a sixth resistor, one end of the sixth resistor is connected to the emitter of the third triode, the other end of the sixth resistor is connected to the emitter of the fourth triode, and the resistance of the sixth resistor is 32k Ω.
In the ac closed switch apparatus, the power module further includes a fourth diode, an anode of the fourth diode is connected to an emitter of the first triode, a cathode of the fourth diode is connected to a base of the second triode, and a model of the fourth diode is L-2733.
In the ac closed switch apparatus of the present invention, the first transistor is an NPN transistor.
In the ac closed switch apparatus of the present invention, the second triode is an NPN-type triode.
In the ac closed switch apparatus of the present invention, the third transistor is an NPN transistor.
In the ac closed switch apparatus of the present invention, the fourth triode is a PNP type triode.
Implement the utility model discloses an exchange closed switch equipment has following beneficial effect: the cabinet body comprises a cabinet door and four supporting legs, a partition plate is arranged at one end of the cabinet body close to the supporting legs, a circuit board is fixed on the partition plate, and a power module is arranged on the circuit board; the power module comprises a voltage input end, a transformer, a second diode, a voltage output end, a first resistor, a first diode, a first triode, a second resistor, a third diode, a second triode, a third resistor, a fourth triode, a fourth resistor, a fifth resistor and a first capacitor, and the third diode is used for current-limiting protection, 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 closed 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 closed switch apparatus of the present invention, a schematic structural diagram of the ac closed switch apparatus is shown in fig. 1. In fig. 1, the flow-sealing switch device includes a cabinet body 1, the cabinet body 1 includes a cabinet door 11 and four supporting legs 12, one end of the cabinet body 1 near the supporting legs 12 is provided with a separation plate 3, a containing cavity 3 is formed between the separation plate 2 and a bottom plate of the cabinet body 1, a pedal 4 with sliding fit is arranged in the containing cavity 3, a fixing member 5 matched with the pedal 4 is further arranged in the cabinet body 1, and the fixing member 5 includes two fixing rods 51 which are respectively arranged on two sides of the cabinet body 1 and are arranged in a clearance. In actual operation, when the AC closed switch equipment needs to be repaired or maintained, a step for people to step on can be built by using the pedal 4.
Can set up a plurality of ventilation holes that are linked together with holding chamber 3 on division board 2, division board 2 is close to the one side at the bottom of the cabinet and is equipped with two radiator fan that are the clearance setting for radiator fan can carry out quick heat dissipation to the cabinet body 1 is interior, and effectual guarantee electronic component's operation prevents that high temperature from producing the influence to electronic component.
In this embodiment, a circuit board 21 is fixed on the partition plate 2, and a power module is disposed on the circuit board 21. Fig. 2 is a schematic circuit diagram of a power supply module in this embodiment, in fig. 2, the power supply module includes a voltage input terminal Vin, a transformer T, a second diode D2, a voltage output terminal Vo, a first resistor R1, a first diode D1, a first transistor Q1, a second resistor R2, a third diode D3, a second transistor Q2, a third transistor Q3, a third resistor R3, a fourth transistor Q4, a fourth resistor R4, a fifth resistor R5, and a first capacitor C1, wherein the voltage input terminal Vin is connected to one end of a primary winding of the transformer T, the other end of the primary winding of the transformer T is connected to a collector of a third transistor Q3, a base of the third transistor Q3 is connected to a cathode of a third diode D3 and a collector of a second transistor Q2, an emitter of the second transistor Q2 is grounded, an emitter of the third transistor Q3 is connected to one end of a third resistor R3 and a collector 4 of the fourth transistor Q2, the other end of the third resistor R3 is grounded, the anode of the third diode D3 is respectively connected with the collector of the first triode Q1 and one end of the first resistor R1, the other end of the first resistor R1 is connected with the cathode of the first diode D1, the anode of the first diode D1 is connected with the base of the first triode Q1, the emitter of the first triode Q1 is respectively connected with one end of the second resistor R2, the base of the second triode Q2, the collector of the fourth triode Q4 and the other end of the fifth resistor R5, the base of the fourth triode Q4 is respectively connected with one end of the fourth resistor R4, the other end of the fifth resistor R5 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is grounded, one end of the secondary winding of the transformer T is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the voltage output Vo, the anode of the third diode D3, the other end of the second resistor R2, and the other end of the fourth resistor R4, respectively.
The third diode D3 is a current limiting diode for current limiting protection. The current limiting protection principle is as follows: when the current of the branch where the third diode D3 is located is large, the current of the branch where the third diode D3 is located can be reduced by the third diode D3, so that the branch can be kept in a normal operating state, and the components in the circuit are not burned out due to the large current, so that the safety and reliability of the circuit are high. It should be noted that in the present embodiment, the model of the third diode D3 is S-562T. Of course, in practical applications, the third diode D3 may also be another type of diode with similar functions.
The working principle of the power supply module is as follows: the voltage input end Vin outputs voltage through the voltage output end Vo after being transformed by the transformer T and after passing through the second diode D2, and the input end overcurrent protection circuit is formed by the third triode Q3, the third resistor R3, the second triode Q2 and other elements. In normal operation, the fourth transistor Q4 is disabled because the emitter voltage is less than the base voltage. When the power supply output current is too large, the current of the third transistor Q3 sharply increases, and the voltage on the third resistor R3 rapidly rises, i.e., the emitter voltage of the fourth transistor Q4 rapidly rises. When the emitter junction voltage of the fourth triode Q4 rises to 0.7V, the fourth triode Q4 is in saturated conduction, the voltage on the third resistor R3 is directly applied to the base of the second triode Q2, so that the second triode Q2 is conducted, the third triode Q3 is cut off, and an overcurrent protection effect is achieved, the first resistor R1, the first diode D1 and the first triode Q1 form an output end overvoltage protection circuit, when the voltage at the output end is too high, the voltage after voltage division through the first resistor R1 and the first diode D1 enables the first triode Q1 to be conducted, the base of the second triode Q2 is also electrically conducted, and therefore the third triode Q3 is cut off, and the electric load is effectively protected.
In this embodiment, the first transistor Q1 is an NPN transistor, the second transistor Q2 is an NPN transistor, the third transistor Q3 is an NPN transistor, and the fourth transistor Q4 is a PNP transistor. Of course, in practical applications, the first transistor Q1, the second transistor Q2, and the third transistor Q3 may also be PNP transistors, but the structure of the circuit is also changed accordingly.
In this embodiment, the power module further includes a sixth resistor R6, one end of the sixth resistor R6 is connected to the emitter of the third transistor Q3, and the other end of the sixth resistor R6 is connected to the emitter of the fourth transistor Q4. The sixth resistor R6 is a current limiting resistor for current limiting protection. The current limiting protection principle is as follows: when the current of the branch where the sixth resistor R6 is located is large, the magnitude of the current of the branch where the sixth resistor R6 is located can be reduced by the sixth resistor R6, so that the branch can be kept in a normal operating state, and the components in the circuit cannot be burned out due to the large current, so that the safety and reliability of the circuit are further enhanced. It should be noted that, in the present embodiment, the resistance of the sixth resistor R6 is 32k Ω. Of course, in practical applications, the resistance of the sixth resistor R6 may be adjusted according to specific situations, that is, the resistance of the sixth resistor R6 may be increased or decreased according to specific situations.
In this embodiment, the power module further includes a fourth diode D4, an anode of the fourth diode D4 is connected to an emitter of the first transistor Q1, and a cathode of the fourth diode D4 is connected to a base of the second transistor Q2. The fourth diode D4 is a current limiting diode, and is used for current limiting protection of the base current of the second transistor Q2. The current limiting protection principle is as follows: when the base current of the second triode Q2 is large, the base current of the second triode Q2 can be reduced by the fourth diode D4 to keep the second triode Q2 in a normal working state, so that the components in the circuit are 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 provided in the power 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 (7)
1. An alternating current closed switch device is characterized by comprising a cabinet body, wherein the cabinet body comprises a cabinet door and four supporting legs, a partition plate is arranged at one end, close to the supporting legs, of the cabinet body, a containing cavity is formed between the partition plate and a bottom plate of the cabinet body, a pedal in sliding fit is arranged in the containing cavity, a fixing piece matched with the pedal is further arranged in the cabinet body, the fixing piece comprises two fixing rods which are respectively arranged at two sides of the cabinet body in a clearance mode, a circuit board is fixed on the partition plate, and a power module is arranged on the circuit board;
the power supply module comprises a voltage input end, a transformer, a second diode, a voltage output end, a first resistor, a first diode, a first triode, a second resistor, a third diode, a second triode, a third resistor, a fourth triode, a fourth resistor, a fifth resistor and a first capacitor, wherein the voltage input end is connected with one end of a primary coil of the transformer, the other end of the primary coil of the transformer is connected with a collector electrode of the third triode, a base electrode of the third triode is respectively connected with a cathode of the third diode and a collector electrode of the second triode, an emitter electrode of the second triode is grounded, an emitter electrode of the third triode is respectively connected with one end of the third resistor and an emitter electrode of the fourth triode, the other end of the third resistor is grounded, and an anode of the third diode is respectively connected with a collector electrode of the first triode and one end of the first resistor, the other end of the first resistor is connected with the cathode of the first diode, the anode of the first diode is connected with the base electrode of the first triode, the emitting electrode of the first triode is respectively connected with one end of the second resistor, the base electrode of the second triode, the collecting electrode of the fourth triode and the other end of the fifth resistor, the base electrode of the fourth triode is respectively connected with one end of the fourth resistor, the other end of the fifth resistor and one end of the first capacitor, the other end of the first capacitor is grounded, one end of the secondary coil of the transformer is connected with the anode of the second diode, the cathode of the second diode is respectively connected with the voltage output end, the anode of the third diode, the other end of the second resistor and the other end of the fourth resistor, and the model of the third diode is S-562T 562.
2. The ac closed switch device according to claim 1, wherein the power module further comprises a sixth resistor, one end of the sixth resistor is connected to the emitter of the third transistor, the other end of the sixth resistor is connected to the emitter of the fourth transistor, and the resistance of the sixth resistor is 32k Ω.
3. The ac closed switch apparatus according to claim 2, wherein the power module further comprises a fourth diode, an anode of the fourth diode is connected to the emitter of the first transistor, a cathode of the fourth diode is connected to the base of the second transistor, and the fourth diode has a model number of L-2733.
4. An ac closed switch device according to any one of claims 1 to 3, wherein the first transistor is an NPN transistor.
5. An ac closed switch device according to any one of claims 1 to 3, wherein the second transistor is an NPN transistor.
6. An ac closed switch device according to any one of claims 1 to 3, wherein the third transistor is an NPN transistor.
7. An AC closed switch device as claimed in any one of claims 1 to 3 wherein said fourth transistor is a PNP type transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921540907.1U CN210838496U (en) | 2019-09-17 | 2019-09-17 | AC closed switch equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921540907.1U CN210838496U (en) | 2019-09-17 | 2019-09-17 | AC closed switch equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210838496U true CN210838496U (en) | 2020-06-23 |
Family
ID=71255885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921540907.1U Expired - Fee Related CN210838496U (en) | 2019-09-17 | 2019-09-17 | AC closed switch equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210838496U (en) |
-
2019
- 2019-09-17 CN CN201921540907.1U patent/CN210838496U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102355124B (en) | Device for avoiding frequent start stop of photovoltaic inverter and photovoltaic inverter | |
| Ribeiro et al. | Characterizing and monitoring voltage transients as problem to sensitive loads | |
| CN210838496U (en) | AC closed switch equipment | |
| Ertl et al. | Active voltage balancing of DC-link electrolytic capacitors | |
| Hosseini et al. | Distributed power quality improvement in residential microgrids | |
| JP2021516948A (en) | Motor controller discharge control circuit | |
| CN205160385U (en) | Power converter based on printed circuit board | |
| CN211046742U (en) | Power conversion device | |
| CN211352552U (en) | LED lighting circuit with short-circuit protection function | |
| CN210490202U (en) | Low-voltage switchgear | |
| Anyanor et al. | Efficient Power Response Characteristics of 2KVA Low Cost Inverter under Resistive Loads and Inductive Loads | |
| CN202495882U (en) | Power supply circuit and television | |
| Khan et al. | Constant common-mode voltage transformerless inverter for grid-tied photovoltaic application | |
| CN210490251U (en) | AC metal enclosed switch equipment | |
| CN212908628U (en) | Low-voltage capacitance compensation cabinet | |
| CN205647247U (en) | A self -adaptation copped wave power module for electrical test | |
| Shaw et al. | A new single‐stage continuous input current‐based high gain boost inverter: Analysis and implementation | |
| CN203911871U (en) | Electron tube high-frequency oscillating circuit | |
| CN205283123U (en) | A exchange lightning protection module for photovoltaic equipment | |
| CN108649529A (en) | A kind of direct-flow electricity utilization apparatus protector | |
| CN209056457U (en) | A kind of ten KV level fuse insulating shields | |
| CN112186775B (en) | Low-voltage powerless compensation device | |
| CN210490241U (en) | MNS AC low-voltage power distribution cabinet | |
| CN219873315U (en) | Circuit and device of power supply safety controller | |
| CN213279496U (en) | 2000W high-frequency sine wave inverter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200623 Termination date: 20210917 |