CN113436410B - False opening alarm device of high tension switchgear backplate - Google Patents
False opening alarm device of high tension switchgear backplate Download PDFInfo
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- CN113436410B CN113436410B CN202110612169.2A CN202110612169A CN113436410B CN 113436410 B CN113436410 B CN 113436410B CN 202110612169 A CN202110612169 A CN 202110612169A CN 113436410 B CN113436410 B CN 113436410B
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
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Abstract
The application relates to a false opening alarm device of high tension switchgear backplate includes: the disconnection alarm leads out two connecting wires, and the two connecting wires do not alarm when connected and send out an alarm when disconnected; two contact points of the magnetic switch are respectively and electrically connected with two connecting wires of the disconnection alarm; the normally closed contacts of the extended relay are electrically connected with the two connecting wires of the disconnection alarm; an auxiliary contact, which is a spare contact of a circuit breaker of the switch cabinet; the auxiliary contact is connected in a power supply loop of the extended relay; and the power supply adopts the power supply of the switch cabinet and is used for supplying power to the extended relay. The utility model provides an alarm device installs the backplate at high tension switchgear, and the alarm will send out the alarm suggestion when opening the back cabinet door by force, and suggestion operating personnel notices the measure of checking once more, plays the prevention and goes into electrified interval suggestion effect by mistake, prevents the emergence of people's body electric shock accident.
Description
Technical Field
The application relates to the technical field of electrical safety, in particular to a false opening alarm device for a back plate of a high-voltage switch cabinet.
Background
The high-voltage switch cabinet is a common power distribution device and can play a role in transmission, control or protection and the like in power generation, power transmission, power distribution and electric energy conversion of a power system. According to the voltage class of 3.6 kV-10 kV, the voltage class of a high-voltage switch cabinet commonly used in a thermal power plant is 6kV/10kV, and the circuit breaker adopts a central arrangement. The five-prevention electrical system is one of important measures for electrical safety, namely that electrical equipment (high-voltage switch cabinet) should have five anti-misoperation functions for short in order to ensure personal and equipment safety.
The electric five-prevention content specifically comprises the following steps: 1. the switch-on with load is prevented. After a vacuum circuit breaker trolley in the high-voltage switch cabinet is switched on at a test position, the trolley circuit breaker cannot enter a working position. 2. Prevent the switch-on with the grounding wire. When the grounding knife in the high-voltage switch cabinet is in a closed position, the trolley circuit breaker cannot be switched on. 3. Prevent the wrong entering into the electrified interval. When a vacuum circuit breaker in the high-voltage switch cabinet is switched on (a grounding knife is at a switch-off position), the rear door of the disk cabinet is locked by a machine on the grounding knife and the cabinet door. 4. Prevent to hang the ground wire with electricity. When a vacuum circuit breaker in a high-voltage power distribution cabinet is switched on during working, the grounding switch can not be switched on. 5. Preventing the knife switch from being pulled under load. When the vacuum circuit breaker in the high-voltage switch cabinet operates in a closing mode at a working position, the vacuum circuit breaker cannot exit from the working position of the trolley circuit breaker.
In the correlation technique, the current error prevention mode for preventing the error entering the electrified interval usually uses the machinery on the grounding knife and the cabinet door locking for the rear door of the cabinet, namely, when the grounding knife is in the opening state, the rear cabinet door is locked by the mechanical locking device and cannot be opened. When the grounding knife is in a brake-off state, the rear door locking mechanism is changed from a vertical position to a horizontal position, and the situation that the cabinet door cannot be opened after being locked is achieved. When the equipment is overhauled, the grounding knife switch is in a closing state, and at the moment, the switch cabinet door can be opened.
The locking device for preventing the mistaken entering of the electrified interval is imperfect, and a maintainer may mistakenly force the back plate of the high-voltage switch cabinet to open under the unknowing condition, so that the mistaken entering of the electrified interval is caused to cause personal injury.
Disclosure of Invention
In order to overcome the problems in the related art at least to a certain extent, the application provides a false opening alarm device of a high-voltage switch cabinet back plate.
The embodiment of the application provides a false opening alarm device of high tension switchgear backplate, includes:
the disconnection alarm leads out two connecting wires, and the two connecting wires do not alarm when connected and send out an alarm when disconnected;
two contact points of the magnetic switch are respectively and electrically connected with two connecting wires of the disconnection alarm;
the normally closed contacts of the extended relay are electrically connected with the two connecting wires of the disconnection alarm;
an auxiliary contact, which is a spare contact of a circuit breaker of the switch cabinet; the auxiliary contact is connected in a power supply loop of the extended relay;
and the power supply adopts the power supply of the switch cabinet and is used for supplying power to the extended relay.
Furthermore, the wire-break alarm adopts a built-in battery, and sends out voice alarm when the connecting wire is broken.
Furthermore, the disconnection alarm is installed on a rear cabinet door of the switch cabinet.
Further, the magnetic switch comprises two pieces of contacts; the two contact points are arranged between an upper door and a lower door of a rear cabinet door of the switch cabinet or arranged on the edge of an integral rear door.
Further, the installation distance between two contact points of the magnetic switch is not more than 1 cm.
Furthermore, the extension relay adopts a small-sized quick action relay, and the power supply of the extension relay is matched with the power supply provided by the switch cabinet.
Further, the extension relay is a relay of MY2NJ type.
Further, the extension relay is installed in a secondary terminal chamber on the front face of the switch cabinet.
Further, the auxiliary contacts are: the circuit breaker is closed when in the working position and open when in the testing position.
Furthermore, the circuit breaker of the switch cabinet is a power supply circuit breaker;
correspondingly, the alarm device also comprises a normally closed contact of a high-voltage live display of the switch cabinet, and the normally closed contact is connected with the normally closed contact of the extension relay in series.
The technical scheme provided by the embodiment of the application has the following beneficial effects:
the utility model provides an alarm device installs the backplate at high tension switchgear, and the alarm will send out the alarm suggestion when opening the back cabinet door by force, and suggestion operating personnel notices the measure of checking once more, plays the prevention and goes into electrified interval suggestion effect by mistake, prevents the emergence of people's body electric shock accident.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of a false opening alarm device for a back panel of a high-voltage switch cabinet according to an exemplary embodiment.
Fig. 2 is a circuit schematic diagram illustrating a false opening alarm device of a back panel of a high voltage switch cabinet according to an exemplary embodiment.
Fig. 3 is a circuit schematic diagram of a false opening alarm device of a high voltage switch cabinet back plate according to another exemplary embodiment.
In the figure: 1-a line break alarm; 2-an extension relay; 3-auxiliary contacts; 4-a power supply; 5-a magnetic switch; 6-normally closed contact of high voltage live display.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.
Fig. 1 is a schematic structural diagram illustrating a false opening alarm device of a back panel of a high voltage switch cabinet according to an exemplary embodiment. The apparatus may include:
the broken line alarm 1 leads out two connecting lines, and the two connecting lines do not alarm when connected and send out an alarm when disconnected;
the two contact points of the magnetic switch 5 are respectively and electrically connected with the two connecting wires of the disconnection alarm 1;
the normally closed contact K2 of the extension relay 2 is electrically connected with the two connecting wires of the disconnection alarm 1;
an auxiliary contact 3, which is a spare contact of a circuit breaker of the switch cabinet; the auxiliary contact 3 is connected in a power supply loop of the extension relay 2;
and the power supply 4 is used for supplying power to the extended relay 2 by adopting the power supply of the switch cabinet.
The utility model provides an alarm device installs the backplate at high tension switchgear, and the alarm will send out the alarm suggestion when opening the back cabinet door by force, and suggestion operating personnel notices the measure of checking once more, plays the prevention and goes into electrified interval suggestion effect by mistake, prevents the emergence of people's body electric shock accident.
The following describes the scheme of the present application in an expanded manner with reference to a specific application scenario.
As shown in the figure 1, the alarm device comprises a disconnection alarm 1, a switch cabinet auxiliary contact 3, an extension relay 2, a power supply 4, a magnetic switch 5 and a connecting wire.
The broken line alarm 1 adopts a built-in battery, two connecting lines are led out from the alarm, the alarm is not given when the connecting lines are well connected, and a voice alarm is given out when the connecting lines are disconnected to give a prompt.
The switch cabinet auxiliary contact 3 adopts a standby contact which is closed at the working position of the circuit breaker body and is opened at the test position.
The expansion relay 2 adopts a small-sized fast-acting relay MY2NJ, the coil voltage can be AC220V or DC220V, and the coil voltage needs to be matched with a power supply provided by a switch cabinet; the normally closed contact of the relay is used as an alarm loop.
The power supply 4 adopts a small power supply switch provided in the switch cabinet, can be AC220V or DC220V, and needs to be matched with an extension relay.
The magnetic switch 5 has two contacts closed when they approach each other and two contacts opened when they are away from each other.
The disconnection alarm and the two magnetic contacts are respectively arranged between the upper door and the lower door of the rear cabinet door, and the distance between the magnetic contacts is not more than 1cm; the extension relay is arranged in a secondary terminal chamber on the front surface of the switch cabinet and is connected by a circuit breaker position auxiliary contact through a control line.
As shown in fig. 2, the loop connection mode is: two leads of the disconnection alarm 1 are connected to the magnetic switch 5, and two control lines are led out from a normally closed contact K2 of the extended relay 2 and connected to the magnetic switch 5; a control line is led out from one end of a lower opening of a power supply small switch in the switch cabinet, and the control line is sequentially connected with an auxiliary contact 3 of the switch cabinet and a coil J2 of the extension relay 2 and is finally connected to the other end of the lower opening of the power supply small switch.
The device can be applied to a switch cabinet which is two back doors or a whole back door, and the positions of the alarm and the magnetic contact point can be adjusted.
As shown in fig. 3, if the inside of the switch cabinet is a power supply type breaker, there is a situation that the lower port of the breaker may transmit electricity reversely; therefore, a normally closed contact 6 of a high-voltage live display of the switch cabinet can be connected in series beside the normally closed contact K2 in an alarm loop.
The technical scheme of the application has the following characteristics:
when the circuit breaker is in a working position, no matter whether the circuit breaker is switched on or not is electrified, an auxiliary contact 3 of the circuit breaker in a control loop of the alarm device is closed, an extension relay 2 is electrified to be closed, and a normally closed contact K2 of the extension relay 2 is opened; when the rear cabinet door is forcibly disassembled by a person, the two magnetic contacts are far away from each other, the closed contact of the two magnetic contacts is opened, and the alarm gives an alarm to prompt an operator and reduce the occurrence of unsafe electric shock events.
When the circuit breaker is at a test position or an isolation position, the auxiliary contact 3 of the circuit breaker in the alarm control loop is opened, the extension relay 2 is not electrified, and the normally closed contact of the extension relay 2 is in a closed state; when the rear cabinet door is opened, the two magnetic contacts are far away from each other, the closed contact is opened, the alarm does not give an alarm at the moment, and the operator can work normally.
When a power circuit breaker is encountered, the situation that the lower port of the circuit breaker possibly transmits power reversely exists, the scheme shown in fig. 3 can be adopted, when the lower port of the circuit breaker transmits power reversely, the high-voltage charge indicator acts, the contact of the high-voltage charge indicator is disconnected, and the circuit breaker is in a working position, namely whether the normally closed contact K2 of the expansion relay 2 is in an on position or an off position. When the rear cabinet door is forcibly disassembled by a person, the two magnetic contacts are far away from each other, the closed contact of the two magnetic contacts is opened, and the alarm gives an alarm to prompt an operator and reduce the occurrence of unsafe electric shock events.
This application is through disconnected wire alarm, cubical switchboard auxiliary contact, extension relay, a power, magnetism contact, the connecting wire is constituteed a high tension switchgear backplate mistake and is opened alarm device by force, the suitability is strong, but wide application in present mainstream 6kV, 10kV high tension switchgear, to two doors or a door about the back, whole reassembling type or hinge open-type cabinet door all can install, easily reform transform, can reduce the electric shock accident that causes because of the people open the backplate by mistake through the skill.
This application installation is simple, can use two-sided self-adhesive to paste broken string alarm, magnetism contact in the cabinet door after carrying out the sanitary clearance to cubical switchboard back door.
This application design circuit breaker auxiliary contact's extension relay can effectively avoid the circuit breaker in the blind spot of overhauing the position (secondary plug-in components are extracting the position), if directly adopt circuit breaker auxiliary contact itself not through extension relay promptly, when the circuit breaker is overhauing the position (secondary plug-in components are extracting the position), auxiliary contact is the disconnection position, take apart normal maintenance and also can the wrong report police when taking apart back cabinet door apart, through the normally closed contact who uses extension relay, when the circuit breaker is overhauing the position (secondary plug-in components are extracting the position), can guarantee that the alarm return circuit is in the short circuit state, even normally take apart the back cabinet door the alarm can not the wrong report police yet.
When a power supply circuit breaker is encountered, the situation that the lower port of the circuit breaker can transmit power reversely exists, a normally closed contact of a high-voltage live displayer of a switch cabinet is designed to be connected in series after the normally closed contact K2 of the relay 2 is expanded in a loop, and whether the normally closed contact K2 is in a closed position or an open position or not is guaranteed. When the rear cabinet door is forcibly disassembled by a person, the two magnetic contacts are away from each other, the closed contact of the two magnetic contacts is opened, and the alarm gives an alarm at the moment, so that the reliability is improved.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar contents in other embodiments may be referred to for the contents which are not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (6)
1. The utility model provides a false opening alarm device of high tension switchgear backplate which characterized in that includes:
the disconnection alarm leads out two connecting wires, and the two connecting wires do not alarm when connected and send out an alarm when disconnected;
the magnetic switch comprises two contact points which are respectively and electrically connected with the two connecting wires of the wire break alarm; the two contact points are arranged between an upper door and a lower door of a rear cabinet door of the switch cabinet or arranged on the edge of an integral rear door; the installation distance between two contact points of the magnetic switch is not more than 1cm;
the extension relay is a relay of MY2NJ type, and a normally closed contact of the extension relay is electrically connected with two connecting wires of the disconnection alarm; the normally closed contact is connected with the magnetic switch in parallel;
an auxiliary contact, which is a spare contact of a circuit breaker of the switch cabinet; the auxiliary contact is connected in a power supply loop of the extended relay; the auxiliary contact is as follows: the spare contact is closed when the circuit breaker is in a working position and is opened when the circuit breaker is in a test position;
and the power supply adopts the power supply of the switch cabinet and is used for supplying power to the extended relay.
2. The false start alarm device of claim 1, wherein the disconnection alarm employs a built-in battery, and a voice alarm is given when the connection line is disconnected.
3. The false opening alarm device according to claim 2, wherein the disconnection alarm is mounted on a rear cabinet door of the switch cabinet.
4. The false opening alarm device according to any one of claims 1-3, wherein the extension relay is a small fast acting relay, and the power supply of the extension relay is matched with the power supply provided by the switch cabinet.
5. The false opening alarm device according to claim 4, wherein the extended relay is mounted to a secondary terminal chamber on a front surface of the switch cabinet.
6. The false opening alarm device according to any one of claims 1 to 3, wherein the circuit breaker of the switch cabinet itself is a power supply type circuit breaker;
correspondingly, the false opening alarm device also comprises a normally closed contact of a high-voltage live display of the switch cabinet, and the normally closed contact is connected with the normally closed contact of the expansion relay in series.
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| CN202110612169.2A CN113436410B (en) | 2021-06-02 | 2021-06-02 | False opening alarm device of high tension switchgear backplate |
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| CN202110612169.2A CN113436410B (en) | 2021-06-02 | 2021-06-02 | False opening alarm device of high tension switchgear backplate |
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| CN113436410A CN113436410A (en) | 2021-09-24 |
| CN113436410B true CN113436410B (en) | 2022-12-02 |
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