CN218829078U - Novel electric leakage detection protection device for prohibiting reset - Google Patents
Novel electric leakage detection protection device for prohibiting reset Download PDFInfo
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- CN218829078U CN218829078U CN202222979724.8U CN202222979724U CN218829078U CN 218829078 U CN218829078 U CN 218829078U CN 202222979724 U CN202222979724 U CN 202222979724U CN 218829078 U CN218829078 U CN 218829078U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The utility model discloses a novel leakage detection protection device which prohibits resetting, which relates to the field of leakage protection and comprises an action module, a leakage detection module, a first driving module and a module which prohibits power-on; the leakage detection module is used for detecting whether the power line leaks electricity or not, and is also used for sending a fault signal when the first leakage detection line and/or the second leakage detection line are/is opened; the first driving module is also used for receiving a fault signal sent by the electric leakage detection module, and the first driving module is also used for driving the action module to disconnect the load power supply after receiving the fault signal; the power-on forbidding module is used for receiving a fault signal sent by the electric leakage detection module and forbidding the electric leakage detection protection device to reset and power on after receiving the fault signal; compared with the prior art, under the condition that the leakage detection line is broken, the power supply of the load is disconnected, the reset electrification of the leakage detection protection device is forbidden, and the use safety is improved.
Description
Technical Field
The utility model relates to an earth leakage protection field especially relates to a novel forbidden earth leakage detection protection that resets device.
Background
The power line leakage protector is used for detecting whether the power line leaks electricity or not and cutting off the power supply when the power line leaks electricity, so that the risk of electric shock or fire of people and animals caused by electricity leakage of power utilization equipment or line short circuit of the power line due to aging, animal bite, extrusion and other reasons is effectively reduced.
For example, chinese utility model CN216794606U proposes a power line leakage detection protection device, an electrical connection device and an electrical appliance. The device comprises: the switch module controls the power connection between the input end and the output end of the power line; the leakage detection module comprises a first leakage detection line covering the first current-carrying line, a second leakage detection line covering the second current-carrying line, a first detection module and a second detection module, wherein the first leakage detection line is used for detecting a first leakage current signal on the first current-carrying line or generating a first self-detection fault signal when the first leakage detection line is opened; the first driving module is coupled with the switch module and the electric leakage detection module, receives the first electric leakage current signal or the first self-detection fault signal and drives the switch module to disconnect the electric power connection; and receiving a second leakage current signal or a second self-detection fault signal and driving the switch module to disconnect the power connection.
The technical scheme of the utility model disconnection power when electric leakage detection line opens circuit, but the user still can try again to go up the electricity behind the disconnection power, though again go up the electricity after again can the disconnection power, but electric leakage detection line disconnection explains that the power cord has been in the damaged state, even the electricity of going up again of short time also has the risk that arouses people and animals to electrocute or catch fire, has the potential safety hazard.
In addition, each leakage detection line of the technical scheme is also provided with a connecting line to form a detection loop, so that the difficulty and the cost of production and processing are improved.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the defects in the prior art, the safety of the electric leakage detection protection device is improved.
2. Technical scheme
In order to solve the above problems, a novel reset-prohibited leakage detection protection device is provided, which includes an action module, a leakage detection module, a first driving module and a power-on prohibition module;
the action module is used for switching on or switching off a load power supply;
the electric leakage detection module is used for detecting whether electric leakage occurs in the power line and sending an electric leakage signal when the electric leakage is detected;
the leakage detection module comprises a first leakage detection line and a second leakage detection line, the first leakage detection line covers a first current-carrying wire in the power line, and the second leakage detection line covers a second current-carrying wire in the power line;
the first driving module is used for receiving a leakage signal sent by the leakage detection module and is also used for driving the action module to disconnect the load power supply after receiving the leakage signal;
the leakage detection module is also used for sending out a fault signal when the first leakage detection line and/or the second leakage detection line are/is opened;
the first driving module is also used for receiving a fault signal sent by the electric leakage detection module, and the first driving module is also used for driving the action module to disconnect the load power supply after receiving the fault signal;
the power-on forbidding module is used for receiving the fault signal sent by the electric leakage detection module and forbidding the electric leakage detection protection device to reset and power on after receiving the fault signal.
The mains supply detection module is used for sending a power-off signal when the reset-forbidden leakage detection protection device is disconnected with mains supply;
the first driving module is also used for receiving a power-off signal sent by the commercial power detection module; the first driving module is configured to drive the action module to disconnect the load power supply after receiving the power-off signal.
The first end of the first leakage detection line is electrically connected with the first driving module;
the first end of the second electric leakage detection line is electrically connected with the first driving module, and the second end of the second electric leakage detection line is electrically connected with the second end of the first electric leakage detection line.
The electric leakage detection protection device for prohibiting reset also comprises a test module, and the test module is electrically connected with the electric leakage detection module; the test module comprises a test key;
the first drive module is further configured to: when the test key is pressed down and the electric leakage detection module works normally, the driving action module disconnects the load power supply.
The test module is used for simulating power line leakage.
The leakage detection protection device for prohibiting reset further comprises a rectification module, and the rectification module is used for rectifying alternating current into direct current.
The power-on forbidding module comprises a reset key, and the action module is connected with the load power supply after the reset key is pressed.
The action module comprises a trip coil and a switch;
the first driving module is used for disconnecting the switch by driving the tripping coil so as to disconnect the load power supply.
The action module comprises a maintaining coil and a switch;
the first driving module enables the switch to lose the force for maintaining the closed state by disconnecting the power supply of the maintaining coil, and further enables the switch to disconnect the load power supply.
The power-on forbidding module further comprises an alarm unit, and the alarm unit is used for giving out sound and/or light alarm and prompting a user that the electric leakage detection protection device is in a state of forbidding resetting and power-on.
The power-on forbidding module is also configured to be in a state of forbidding resetting and power-on of the leakage detection protection device, and the action module is not connected with the load power supply after the reset key is pressed.
The two ends of the trip coil are connected with the first capacitor in parallel.
3. The beneficial effects of the utility model
Compared with the prior art, the power-on forbidding module is arranged, under the condition that the electric leakage detection line is broken, the power supply of the load is disconnected, the electric leakage detection protection device is forbidden to reset and power on, the use safety is improved, the alarm unit is used for reminding the abnormality of the electric leakage detection protection device, and the use experience of a user is improved.
Through the detection loop that forms two electric leakage detection lines and first drive module, need not to dispose the connecting wire in addition for electric leakage detection line, both can realize earth leakage protection's function and open a way self-checking function, reduced the production degree of difficulty and cost.
Through setting up electric detection module for when electric leakage detection protection device switched on the commercial power next time, electric leakage detection protection device's initial condition was the state of disconnection load power, has further improved the safety in utilization.
Drawings
Fig. 1 is a schematic block diagram of embodiment 1 of the present invention;
fig. 2 is a schematic diagram of embodiment 1 of the present invention;
fig. 3 is a schematic diagram of embodiment 2 of the present invention;
fig. 4 is a schematic diagram of embodiment 3 of the present invention;
fig. 5 is a schematic diagram of embodiment 4 of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are provided to illustrate the invention but are not intended to limit the scope of the invention.
Example 1:
as shown in fig. 1, the electrical leakage detection protection device includes an action module 10, an electrical leakage detection module 20, a first driving module 30, a testing module 40, a rectifying module 50, and a power-up prohibition module 60.
As shown in fig. 2, the rectifier module 50 includes a rectifier bridge D1, a rectifier bridge D6, and a voltage dependent resistor ZNR1, and the rectifier module 50 is used for rectifying ac power into dc power and for transient voltage protection;
the leakage detection module 20 includes a first leakage detection line 21 and a second leakage detection line 22, the first leakage detection line 21 covers the live line L in the power line, and the second leakage detection line 22 covers the zero line N in the power line, and it should be noted that the leakage detection line is covered with an insulation shielding layer (not shown in the figure), and a person skilled in the art may also use a leakage detection line with one side being an insulation layer and the other side being a conductor, and this embodiment is not limited herein;
a first end A of the first leakage detection line 21 is electrically connected with a control electrode of the silicon controlled rectifier SCR 1; a first end B of the second leakage detection line 22 is electrically connected with the cathode of the silicon controlled rectifier SCR 1; the second end C of the first leakage detection line 21 is electrically connected with the second end D of the second leakage detection line 22, so that a leakage detection loop is formed, when the zero line N or the live line L leaks electricity, the silicon controlled rectifier SCR3 is conducted through leakage current, so that the trip coil L2 is electrified, and the switch S1 cuts off a load power supply;
that is, when the leakage detecting module 20 detects leakage, the leakage detecting module 20 sends out a leakage signal, and the first driving module 30 receives the leakage signal sent out by the leakage detecting module 20 and then drives the action module 10 to turn off the load power supply.
When the first leakage detection line 21 and the second leakage detection line 22 are intact, the silicon controlled rectifier SCR1 is cut off, and the leakage detection protection device is always in an open-circuit self-detection state; when the first leakage detection line 21 and/or the second leakage detection line 22 are/is opened due to mouse bite and the like, the SCR1 is conducted, so that the controlled silicon Q3, the triode Q1 and the controlled silicon SCR3 are conducted, the trip coil L2 is electrified, and the switch S1 cuts off a load power supply; two ends of the trip coil L2 are connected with a capacitor C10 in parallel and used for preventing the silicon controlled rectifier Q3 from being locked;
that is, when the first leakage detection line 21 and/or the second leakage detection line 22 are/is opened, a fault signal is sent out, and the first driving module 30 drives the action module 10 to disconnect the load power supply after receiving the fault signal;
the leakage detection protection device of this embodiment need not to dispose the connecting wire in addition for the leakage detection line through the detection return circuit with two leakage detection lines and first drive module formation, both can realize leakage protection's function and open a way self-checking function, has reduced the production degree of difficulty and cost.
When the SCR1 is conducted, the optocoupler U1 and the triode Q4 are conducted, so that the triode Q6 is conducted;
if the reset key T2 is pressed by a user at the moment, the power supply is cut off at the moment of resetting and electrifying, and the purpose of forbidding the electric leakage detection protection device to reset and electrify is realized.
Namely, the power-on prohibiting module 60 prohibits the earth leakage detection protection device from being reset and powered on after receiving the fault signal.
The power-on prohibition module 60 is further provided with an alarm unit, and the alarm unit is used for giving out sound and/or light alarm to prompt a user that the electric leakage detection protection device is in a state of prohibiting resetting and power-on; in this embodiment, the alarm unit is an LED lamp LED2. When the triode Q4 is turned on, the LED lamp LED2 is lit.
The electric leakage detection protection device of this embodiment forbids to go up power module 60 through setting up, under the condition that the electric leakage detection line breaks circuit, the power of disconnection load and forbid electric leakage detection protection device to reset and go up the electricity, improved the safety in utilization, still remind electric leakage detection protection device unusual through alarm unit, promoted user's use and experienced.
The test module 40 comprises a test key T1 and a resistor R1, one end of the test key T1 is electrically connected with the live wire L through the resistor R1, and the other end of the test key T1 is electrically connected with the first end A of the first leakage detection line 21 and the control electrode of the silicon controlled SCR1 respectively;
when a user presses a test key T1, under the condition that the electric leakage detection protection device is normal, the silicon controlled rectifier SCR3 is conducted, and then the electric leakage detection protection device is powered off; when a user presses the test key T1, if the power supply of the electric leakage detection protection device is not disconnected, the electric leakage detection protection device is indicated to have a fault.
A user presses a test button T1 to detect whether all leakage detection lines are open-circuited or not and whether the leakage protection function is normal or not, and the use convenience is improved.
Example 2:
as shown in fig. 3, the present embodiment is different from embodiment 1 in that:
in this embodiment, the leakage detection protection device further includes a commercial power detection module 70, and when the leakage detection protection device is disconnected from the commercial power (for example, a plug of the leakage detection protection device is directly unplugged without cutting off a load power), the transistor Q7 is turned off, so that the SCR4 is turned on, and then the SCR3 is turned on, thereby turning off the switch S1.
Namely, the utility power detection module 70 sends out a power-off signal when the leakage detection protection device is disconnected from the utility power; the first driving module 30 receives the power-off signal and then drives the action module 10 to disconnect the load power supply.
By arranging the electric detection module 70, when the electric leakage detection protection device is connected with the mains supply next time, the initial state of the electric leakage detection protection device is the state of disconnecting the load power supply, and the use safety is improved.
Example 3:
as shown in fig. 4, the present embodiment is different from embodiment 1 in that:
the leakage detection protection device of the embodiment is a maintenance-type leakage detection protection device, when the power is on, the power coil L1 is powered off after the power coil L1 attracts the switch S1, and the power for maintaining the switch S1 in a closed state is generated by continuously powering on the maintenance coil L3.
The first driving module 30 turns off the power of the maintaining coil L3, so that the switch S1 loses the force of maintaining the closed state, and the switch S1 turns off the load power.
By arranging the maintaining coil L3, when the electric leakage detection protection device is disconnected with the mains supply, the electric leakage detection protection device can disconnect the load power supply, so that the initial state of the electric leakage detection protection device is the state of disconnecting the load power supply when the electric leakage detection protection device is connected with the mains supply next time; and once the leakage detection protection device fails, the switch S1 cannot be maintained in a closed state, and the load power supply is disconnected, so that the use safety is further improved.
Example 4:
as shown in fig. 5, the present embodiment is different from embodiment 1 in that:
the base electrode of the triode Q6 is electrically connected with the control electrode of the controllable silicon Q3 through the resistor R20, and the reset key T2 is shielded under the condition that electric leakage continuously occurs or an electric leakage detection line is disconnected, namely, the reset key T2 is pressed without any reaction, the reset power-on function of the electric leakage detection protection device can be understood as forbidden, compared with the power-on function of the embodiment 1, the power supply is disconnected at the moment of power-on, and the safety is further improved.
The above embodiments are only used for illustrating the present invention, and not for limiting the present invention, and those skilled in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.
Claims (12)
1. The novel leakage detection protection device for prohibiting reset is characterized by comprising an action module (10), a leakage detection module (20), a first driving module (30) and a power-on prohibition module (60);
the action module (10) is used for switching on or off a load power supply;
the electric leakage detection module (20) is used for detecting whether electric leakage occurs in the power line and sending an electric leakage signal when the electric leakage is detected;
the electric leakage detection module (20) comprises a first electric leakage detection line (21) and a second electric leakage detection line (22), the first electric leakage detection line (21) covers a first current-carrying line in the power line, and the second electric leakage detection line (22) covers a second current-carrying line in the power line;
the first driving module (30) is used for receiving a leakage signal sent by the leakage detection module (20), and the first driving module (30) is also used for driving the action module (10) to disconnect a load power supply after receiving the leakage signal;
the leakage detection module (20) is further configured to issue a fault signal when the first leakage detection line (21) and/or the second leakage detection line (22) is open-circuited;
the first driving module (30) is further configured to receive a fault signal sent by the leakage detection module (20), and the first driving module (30) is further configured to drive the action module (10) to disconnect a load power supply after receiving the fault signal;
the power-on forbidding module (60) is used for receiving a fault signal sent by the electric leakage detection module (20), and the power-on forbidding module (60) is also used for forbidding the electric leakage detection protection device to reset and power on after receiving the fault signal.
2. A novel leakage detection protection device with reset prohibition according to claim 1, characterized in that said leakage detection protection device with reset prohibition further comprises a mains detection module (70), said mains detection module (70) is used for sending out a power-off signal when said leakage detection protection device is disconnected from mains;
the first driving module (30) is further used for receiving a power-off signal sent by the mains supply detection module (70); the first driving module (30) is configured to drive the action module (10) to disconnect the load power supply after receiving a power-off signal.
3. A novel reset-inhibited earth leakage detection protection device as claimed in claim 1, characterized in that a first terminal (a) of said first earth leakage detection line (21) is electrically connected to said first driver module (30);
a first end (B) of the second electric leakage detection line (22) is electrically connected with the first driving module (30), and a second end (D) of the second electric leakage detection line (22) is electrically connected with a second end (C) of the first electric leakage detection line (21).
4. A novel reset-inhibited earth leakage detection protection device as claimed in claim 3, further comprising a test module (40), said test module (40) being electrically connected to said earth leakage detection module (20); the test module (40) comprises a test key (T1);
the first drive module (30) is further configured to: and when the test key (T1) is pressed down and the electric leakage detection module (20) works normally, the action module (10) is driven to disconnect the load power supply.
5. A novel reset-inhibited earth leakage detection protection device as claimed in claim 4, characterized in that said test module (40) is adapted to simulate power line leakage.
6. A novel reset-inhibited earth leakage detection protection device as claimed in claim 1, characterized in that said earth leakage detection protection device further comprises a rectifying module (50), said rectifying module (50) being adapted to rectify an alternating current into a direct current.
7. A novel earth leakage protection device with power-on prohibition according to claim 1, characterized in that said power-on prohibition module (60) includes a reset button (T2), and after said reset button (T2) is pressed, said action module (10) turns on the load power.
8. A novel reset-inhibited earth leakage detection protection device as claimed in claim 1, characterized in that said action module (10) comprises a trip coil (L2) and a switch (S1);
the first driving module (30) drives the trip coil (L2) to disconnect the switch (S1), and then a load power supply is disconnected.
9. A novel reset-inhibited earth leakage detection protection device as claimed in claim 1, characterized in that said action module (10) comprises a holding coil (L3) and a switch (S1);
the first driving module (30) enables the switch (S1) to lose the force for maintaining the closed state by disconnecting the power supply of the maintaining coil (L3), and then enables the switch (S1) to disconnect the power supply of the load.
10. A novel reset-inhibited electrical leakage detection protection device according to claim 1, wherein said power-up inhibition module (60) further comprises an alarm unit for emitting an audible and/or visual alarm to alert a user that said electrical leakage detection protection device is in a reset-inhibited power-up state.
11. A novel earth leakage protection device with power-on prohibition according to claim 7, characterized in that said power-on prohibition module (60) is further configured to not turn on the load power supply by said action module (10) after said reset button (T2) is pressed when the earth leakage protection device is in the state of prohibiting power-on for reset.
12. A novel earth leakage detection protection device with reset prohibition according to claim 8, characterized in that the first capacitor (C10) is connected in parallel across the trip coil (L2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022224006546 | 2022-09-09 | ||
| CN202222400654 | 2022-09-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218829078U true CN218829078U (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222979724.8U Active CN218829078U (en) | 2022-09-09 | 2022-11-09 | Novel electric leakage detection protection device for prohibiting reset |
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|---|---|
| CN (1) | CN218829078U (en) |
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- 2022-11-09 CN CN202222979724.8U patent/CN218829078U/en active Active
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