CN210535953U - Wiring terminal with overvoltage and overcurrent protection and indication functions - Google Patents
Wiring terminal with overvoltage and overcurrent protection and indication functions Download PDFInfo
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- CN210535953U CN210535953U CN201922076250.4U CN201922076250U CN210535953U CN 210535953 U CN210535953 U CN 210535953U CN 201922076250 U CN201922076250 U CN 201922076250U CN 210535953 U CN210535953 U CN 210535953U
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Abstract
The utility model discloses a binding post with overvoltage and overcurrent protection and instruction, including the binding post body, the binding post body includes A, B, C, D four terminals, its characterized in that, terminal A passes through first emitting diode electric connection with terminal B, terminal C passes through fuse electric connection with terminal D, the fuse still connects in parallel has fusing display device, fusing display device is current-limiting resistance and the second emitting diode of series connection; the terminal A and the terminal C are also electrically connected through a piezoresistor. Therefore, the utility model discloses a binding post with excessive pressure and overcurrent protection and instruction can take place lasting excessive pressure, when overflowing the condition to the preceding stage circuit, carry out effectual protection to the back stage circuit to can send excessive pressure and overflow the instruction, the suggestion staff carries out corresponding troubleshooting.
Description
Technical Field
The utility model relates to an electrical connection field especially relates to a binding post with excessive pressure and overcurrent protection and instruction.
Background
Binding post is the device that is used for crimping switch board inlet wire cable.
Because the control cabinet is generally provided with dozens of or hundreds of or even thousands of cables, the problem that individual cables are subjected to wiring errors, electrical equipment at the rear end is easily burnt due to overvoltage due to the wiring errors, and the problem that the insulation of the cables is damaged or even the cables are short-circuited to cause fire disasters due to overcurrent in a circuit caused by the wiring errors is also possibly solved.
The existing control cabinet is generally provided with an independent overvoltage and overcurrent protector at the position where a power supply enters the cabinet, so that all equipment in the cabinet is generally protected, and the following defects exist:
firstly, such protectors generally adopt transient voltage suppression diodes (TVS for short) to protect overvoltage, which only protect static and lightning transient high voltages, such high voltages are characterized by a duration of microsecond level and are very short, the protection mode generally is to directly introduce high voltage into a ground wire, but cannot meet the requirement of continuously protecting excessive voltage caused by wrong connection or various reasons of a preceding circuit, for example, when a line with a design voltage of 24V is mistakenly connected to a voltage of 36V or 220V, such high voltage cannot instantaneously disappear like static, as long as a fault is not eliminated, the overvoltage condition can continuously exist, and in such a situation, the TVS can be burned out, and the protection cannot be provided for a subsequent circuit.
Secondly, in a scene of adopting the transient voltage suppression diode, because of the transient impact event, no trace is generated after the general impact event, a worker cannot judge which protector starts the protection action once and cannot analyze the reason of generating high voltage, so that potential safety hazards are fundamentally eliminated, and indication information cannot be provided for the worker when the preceding stage circuit caused by various reasons introduces continuous high voltage, which is not beneficial to troubleshooting.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: a terminal having over-voltage and over-current protection and indication is provided.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
a wiring terminal with overvoltage and overcurrent protection and indication comprises a wiring terminal body, wherein A, B, C, D four wiring terminals are arranged on the wiring terminal body, and the wiring terminal is characterized in that a wiring terminal A is electrically connected with a wiring terminal B through a first light-emitting diode, a wiring terminal C is electrically connected with a wiring terminal D through a fuse, the fuse is also connected with a fuse display device in parallel, and the fuse display device is a current-limiting resistor and a second light-emitting diode which are connected in series; the terminal A and the terminal C are also electrically connected through a piezoresistor.
The technical scheme has the advantages that when the circuit is subjected to overcurrent due to various reasons, the fuse is timely fused to protect the safety of a rear-stage circuit, and after the fuse is fused, the fusing display device is normally on to prompt a worker that the fuse is fused; when the overvoltage occurs in the circuit due to various reasons, the piezoresistor connected in parallel on the post circuit acts to clamp the voltage between the wiring terminal A and the wiring terminal C below the designed safe voltage, so that the safety of the post circuit equipment is ensured, and meanwhile, due to the action of the piezoresistor, the voltage between the wiring terminal A and the wiring terminal C is not enough to excite the first light-emitting diode to be conducted, so that the first light-emitting diode is extinguished, prompt information is provided for workers, and the overvoltage phenomenon exists in the upper circuit. In order to ensure the safety of the upper circuit after the piezoresistor is operated, a corresponding short-circuit protection device is arranged in the upper circuit.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Preferably, the fuse is a plug-in fuse.
The beneficial effect of adopting above-mentioned further scheme is that, can be convenient change after the fuse fuses.
Preferably, the first light emitting diode and the fusing display device are both in a plug-in design;
the beneficial effect of adopting above-mentioned further scheme is that, can be convenient adjust first emitting diode and fusing display device's polarity.
Furthermore, the terminal A, C is an incoming line, the terminal B, D is an outgoing line, the terminal a is connected to the cathode of the first light emitting diode, and the terminal D is connected to the cathode of the second light emitting diode or the terminal C is connected to the anode of the second light emitting diode.
Adopt above-mentioned further scheme's beneficial effect be if the overvoltage phenomenon takes place, can cut high voltage before binding post, ensure the safety of back level circuit and fuse, this scheme is applicable to the condition that preceding stage circuit is equipped with short-circuit protection device.
Furthermore, a binding post B, D is an incoming line, A, C is an outgoing line, the binding post a is connected with the anode of the first light emitting diode, and the binding post D is connected with the anode of the second light emitting diode or the binding post C is connected with the cathode of the second light emitting diode.
The terminal has the advantages that if overvoltage occurs, the terminal can cut off high voltage behind the terminal to enable a superior circuit to be in a short circuit state behind the terminal, and the terminal also has an overcurrent protection function, so that after the voltage dependent resistor acts to short circuit the superior circuit, the overcurrent protection device of the terminal is started immediately, and the safety of the superior circuit can be protected while the posterior circuit is protected. The scheme is suitable for the condition that the preceding stage circuit does not have a short-circuit protection device.
Drawings
Fig. 1 is a schematic structural view of a connection terminal with overvoltage and overcurrent protection and indication according to the present invention;
fig. 2 is an exploded view of the terminal with overvoltage and overcurrent protection and indication of the present invention;
in the drawings, the parts names represented by the respective reference numerals are listed as follows:
a \ B \ C \ D and binding posts; 1. a first light emitting diode; 2. a voltage dependent resistor; 3. a fuse; 4. a current limiting resistor; 5. a second light emitting diode; 6. binding post body.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Fig. 1 is a schematic structural diagram of a terminal with overvoltage and overcurrent protection and indication according to the present invention. The wiring terminal with overvoltage and overcurrent protection and indication comprises a wiring terminal body 6, wherein A, B, C, D four wiring terminals are arranged on the wiring terminal, the wiring terminal A is electrically connected with the wiring terminal B through a first light-emitting diode 1, the wiring terminal C is electrically connected with the wiring terminal D through a fuse 3, the fuse 3 is also connected with a fusing display device in parallel, and the fusing display device is a current-limiting resistor 4 and a second light-emitting diode 5 which are connected in series; the terminal A and the terminal C are also electrically connected through a piezoresistor 2.
The fuse is a plug-in fuse, and the first light-emitting diode and the fusing display device are both in plug-in design.
In the first case, when A, C is an incoming line, B, D is an outgoing line, the terminal a is connected with the cathode of the first light emitting diode 1, the terminal D is connected with the cathode of the second light emitting diode 5, or the terminal C is connected with the anode of the second light emitting diode, and the scheme is suitable for the situation that a preceding-stage circuit is provided with short-circuit protection.
In the second case, B, D is an incoming line, A, C is an outgoing line, the terminal a is connected to the anode of the first light emitting diode 1, and the terminal D is connected to the anode of the second light emitting diode 5 or the terminal C is connected to the cathode of the second light emitting diode. The scheme is suitable for the condition that the front-stage circuit does not have an independent short-circuit protection device, so that the protection of the rear-stage circuit can be realized, and the protection of the front-stage circuit can also be realized.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. A wiring terminal with overvoltage and overcurrent protection and indication comprises a wiring terminal body, wherein A, B, C, D four wiring terminals are arranged on the wiring terminal body, and the wiring terminal is characterized in that a wiring terminal A is electrically connected with a wiring terminal B through a first light-emitting diode, a wiring terminal C is electrically connected with a wiring terminal D through a fuse, the fuse is also connected with a fuse display device in parallel, and the fuse display device is a current-limiting resistor and a second light-emitting diode which are connected in series; the terminal A and the terminal C are also electrically connected through a piezoresistor.
2. A terminal with overvoltage and overcurrent protection and indication as claimed in claim 1, wherein the fuse is a plug-in fuse.
3. The connection terminal with overvoltage and overcurrent protection and indication as claimed in claim 1, wherein the first light emitting diode and the fusing display device are both of a plug-in design.
4. The connection terminal with overvoltage and overcurrent protection and indication as claimed in claim 3, wherein A, C is an incoming line, B, D is an outgoing line, terminal A is connected to the cathode of the first LED, terminal D is connected to the cathode of the second LED, or terminal C is connected to the anode of the second LED.
5. A terminal with overvoltage and overcurrent protection and indication as claimed in claim 3, wherein B, D is an incoming line, A, C is an outgoing line, terminal a is connected to the anode of the first led, terminal D is connected to the anode of the second led or terminal C is connected to the cathode of the second led.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922076250.4U CN210535953U (en) | 2019-11-27 | 2019-11-27 | Wiring terminal with overvoltage and overcurrent protection and indication functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922076250.4U CN210535953U (en) | 2019-11-27 | 2019-11-27 | Wiring terminal with overvoltage and overcurrent protection and indication functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210535953U true CN210535953U (en) | 2020-05-15 |
Family
ID=70609077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922076250.4U Active CN210535953U (en) | 2019-11-27 | 2019-11-27 | Wiring terminal with overvoltage and overcurrent protection and indication functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210535953U (en) |
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2019
- 2019-11-27 CN CN201922076250.4U patent/CN210535953U/en active Active
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