CN215378426U - Zero ground wire malfunction protection device - Google Patents
Zero ground wire malfunction protection device Download PDFInfo
- Publication number
- CN215378426U CN215378426U CN202121718522.7U CN202121718522U CN215378426U CN 215378426 U CN215378426 U CN 215378426U CN 202121718522 U CN202121718522 U CN 202121718522U CN 215378426 U CN215378426 U CN 215378426U
- Authority
- CN
- China
- Prior art keywords
- circuit
- pulse
- alarm
- signal
- protection device
- 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.)
- Active
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model provides a zero-ground wire abnormality protection device which comprises a circuit board arranged in a grounding mode, wherein a signal sensing circuit, a pulse circuit, an alarm circuit and an emergency stop switch are arranged on the circuit board; the signal induction circuit is connected with the zero line, the live line and the ground wire input ports of an external air switch; the pulse circuit is connected with the output end of the signal induction circuit; the output end of the pulse circuit is connected with the alarm circuit and the emergency stop switch; the emergency stop switch is used for receiving the pulse signal generated by the pulse circuit and controlling the air switch to trip. The product is connected with a zero ground wire access terminal at the upper end of the air switch, the pulse circuit on the circuit board receives and releases signals, the signals are transmitted to the alarm circuit, the alarm circuit responds and gives an alarm, and the emergency stop switch responds at the same time, so that the air switch automatically trips, and the effect of protecting equipment and facilities is achieved. The utility model has the advantages of high reaction speed, stable signal, high sensitivity and the like.
Description
Technical Field
The utility model relates to the technical field of protection circuits, in particular to a zero-ground line aberration protection device.
Background
In the temporary mobile electrical equipment such as construction power consumption, zero hour power consumption, mechanical equipment, heavy industry electrical equipment, zero line, ground wire fracture or damage and backfire can take place sometimes, and at present, some air switches on the market do not have zero ground wire protect function, lead to electromechanical equipment to damage, can threaten personal safety even.
SUMMERY OF THE UTILITY MODEL
The utility model provides a zero-ground wire abnormality protection device, which solves the problems that electromechanical equipment is damaged and even personal safety is threatened after zero-ground wire abnormality at the upper end of an air switch.
The technical scheme provided by the utility model is as follows: the utility model provides a zero ground wire protection device that breaks regularly, includes the circuit board that ground connection set up, be provided with signal induction circuit, pulse circuit, warning circuit and scram switch on the circuit board:
the signal induction circuit is connected with the zero line, the live line and the ground wire input port of an external air switch;
the pulse circuit is connected with the output end of the signal induction circuit and is used for processing the induction signal output by the signal induction circuit;
the output end of the pulse circuit is connected with the alarm circuit and the emergency stop switch, and the alarm circuit is used for receiving the signal generated by the pulse circuit and giving an alarm; the emergency stop switch is used for receiving the signal generated by the pulse circuit and controlling the air switch to trip.
In one possible embodiment, the emergency stop switch employs a normally open relay.
In one possible embodiment, the alarm circuit employs an audible and visual alarm.
In a possible embodiment, the signal sensing circuit comprises diodes corresponding to the zero line and the live line of the air switch in a one-to-one manner, the output end of the diode on the zero line is connected to the input end of the pulse circuit, and the output end of the live line is connected to the output end of the input end of the pulse circuit.
In one possible embodiment, the operating voltage of the circuit board is 70V to 500V, and the operating current is more than 20 mA.
The zero-ground wire abnormality protection device provided by the utility model has the advantages that the product is connected with the zero-ground wire access terminal at the upper end of the air switch, the pulse circuit on the circuit board receives and releases signals, the signals are transmitted to the alarm circuit, the alarm circuit responds and gives an alarm, and the emergency stop switch responds at the same time, so that the air switch automatically trips, and the effect of protecting equipment facilities is achieved. The utility model has the advantages of high reaction speed, stable signal, high sensitivity and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are 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 block diagram of a zero-ground fault protection device provided by the present invention;
FIG. 2 is a schematic diagram of a pulse circuit of the present invention;
fig. 3 is a schematic diagram of a connecting circuit of the zgnd protection device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present embodiment provides a zero-ground fault protection device, which includes a circuit board, a signal sensing circuit disposed on the circuit board, the signal sensing circuit connected to the upper end of an air switch, the upper end of the air switch connected to a zero line, a fire line and a ground line to the signal sensing circuit, a pulse circuit connected to the output end of the signal sensing circuit, when the zero line and the fire line between the signal sensing circuit and the air switch are abnormal, a zero line backfire is generated, the backfire signal (current and voltage signals) is output to the pulse circuit through the signal sensing circuit, the pulse circuit shapes and amplifies the backfire signal, the output end of the pulse circuit is connected to the alarm circuit, when the signal output by the pulse circuit triggers the alarm circuit, an alarm is started, and meanwhile, the output end of the pulse circuit is connected to an emergency stop switch, that is, the emergency stop switch is connected to the air switch, when the pulse circuit triggers the emergency stop switch to act, the air switch can automatically trip after the emergency stop switch is closed.
In one possible embodiment, the signal sensing circuit includes a three-phase four-wire consisting of four diodes, A, B, C and N. Of course, a normal wire consisting of two diodes, a neutral wire, a live wire and a ground wire, is also possible.
Optionally, the three-phase four-wire leading-out terminals at the upper end of the air switch are respectively connected with corresponding diodes, wherein A, B, C three wires are connected in parallel, share one output end after being connected in parallel, and the output end is connected with the input end of the pulse circuit.
Alternatively, one possible circuit structure of the pulse circuit is shown in fig. 2, and of course, other pulse circuits may be implemented, which are not described herein.
The output end of the pulse circuit is connected with the alarm circuit and the emergency stop switch, wherein the alarm circuit can be selected from an audible and visual alarm which is obtained by outsourcing, and other circuits with alarm function can also be realized, which is not described herein. When the induction signal in the pulse circuit enters the audible and visual alarm, the relay in the audible and visual alarm is triggered to be opened, so that the audible and visual alarm gives out alarm sound and emits light.
In a possible implementation mode, the emergency stop switch adopts a 220V normally open relay, and other electronic driving circuits such as a silicon controlled rectifier driving circuit, an integrated block driving circuit and the like can be selected for replacement. When the normally open relay senses a current and voltage signal of the pulse circuit, the normally open relay is closed, and the air switch is tripped due to the fact that the normally open relay is connected with the air switch.
Optionally, the cathode of the diode on the neutral line in the three-phase four-wire is connected to the output end of the pulse circuit. And (5) grounding the negative electrode of the pulse circuit.
Alternatively, the circuit board can work under the conditions that the voltage is 70V-500V and the current is more than 20 mA.
Illustratively, when the air switch is used specifically, when the zero line and the live line are abnormal, the zero line will be in a backfire state, a signal is generated to the signal induction circuit when the zero line and the live line are in the backfire state, the signal induced by the signal induction circuit is output to the pulse circuit, the pulse circuit processes the induction signal, the processed pulse signal is output to the alarm circuit to trigger the alarm circuit to alarm, and meanwhile, the pulse signal triggers the emergency stop switch to act to control the air switch to trip.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The utility model provides a zero ground wire protection device that breaks regularly which characterized in that, circuit board including ground connection setting, be provided with signal induction circuit, pulse circuit, warning circuit and scram switch on the circuit board:
the signal induction circuit is connected with the zero line, the live line and the ground wire input port of an external air switch;
the pulse circuit is connected with the output end of the signal induction circuit and is used for processing the induction signal output by the signal induction circuit;
the output end of the pulse circuit is connected with the alarm circuit and the emergency stop switch, and the alarm circuit is used for receiving the signal generated by the pulse circuit and giving an alarm; the emergency stop switch is used for receiving the signal generated by the pulse circuit and controlling the air switch to trip.
2. The zg protection device of claim 1, wherein the emergency stop switch is a normally open relay.
3. The zg-esd protection device of claim 1, wherein the alarm circuit is an audible and visual alarm.
4. The zvs protection device of claim 1, wherein the signal sensing circuit comprises diodes corresponding to the neutral line and the live line of the air switch in a one-to-one manner, wherein an output terminal of the diode on the neutral line is connected to an input terminal of the pulse circuit, and an output terminal of the live line is connected to an output terminal of the input terminal of the pulse circuit.
5. A zero ground fault protection device according to any of claims 1-4, characterized in that the operating voltage of the circuit board is 70V to 500V and the operating current is more than 20 mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121718522.7U CN215378426U (en) | 2021-07-27 | 2021-07-27 | Zero ground wire malfunction protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121718522.7U CN215378426U (en) | 2021-07-27 | 2021-07-27 | Zero ground wire malfunction protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215378426U true CN215378426U (en) | 2021-12-31 |
Family
ID=79612254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121718522.7U Active CN215378426U (en) | 2021-07-27 | 2021-07-27 | Zero ground wire malfunction protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215378426U (en) |
-
2021
- 2021-07-27 CN CN202121718522.7U patent/CN215378426U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9219360B2 (en) | Safe quick disconnect leakage protector | |
| CN102332699B (en) | Ground wire safety voltage control system | |
| CN202167827U (en) | Safe quick-break type leakage protector | |
| CN201682263U (en) | Leakage protection device | |
| WO2008061357A1 (en) | Ground fault detector interrupter | |
| CN103633568A (en) | Household multifunctional safety protection distribution box | |
| CN202159961U (en) | Ground wire safe voltage control system | |
| CN203596508U (en) | Multifunctional household safety protection distribution box | |
| CN103683225A (en) | Ground fault protection method of nuclear plant low-voltage power distribution system in all power supply ranges | |
| US6731482B2 (en) | Ground fault circuit interrupter | |
| CN203260997U (en) | Three-phase safety electricity-using appliance | |
| CN108418173A (en) | A kind of arc-fault circuit interrupter | |
| CN215378426U (en) | Zero ground wire malfunction protection device | |
| CN210016275U (en) | Improved capacitor tripping device for high-voltage AC system | |
| CN218449596U (en) | Power supply switching circuit during fire alarm | |
| CN216215916U (en) | Power consumption protector for three-phase balance immersion electric shock prevention | |
| CN104810792A (en) | Electric leakage protection device and control method thereof | |
| CN203260995U (en) | Single-phase safety electricity-using appliance | |
| CN202190057U (en) | Generator grounding protective device | |
| CN201481442U (en) | Safety protecting device of computerized tomographic scanning device | |
| KR20050084244A (en) | Device for protection from thunder | |
| CN205791495U (en) | The protection of controller switching equipment intelligent switch-on controls device | |
| CN213813746U (en) | Residual current protection and data output circuit | |
| CN217590235U (en) | Protection circuit, protection device, earth leakage protection control circuit and earth leakage protection switch | |
| CN213521264U (en) | Intelligent power line leakage current protection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |