CN211375761U - Neutral point grounding resistance cabinet alarm device - Google Patents
Neutral point grounding resistance cabinet alarm device Download PDFInfo
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- CN211375761U CN211375761U CN202020396461.6U CN202020396461U CN211375761U CN 211375761 U CN211375761 U CN 211375761U CN 202020396461 U CN202020396461 U CN 202020396461U CN 211375761 U CN211375761 U CN 211375761U
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Abstract
The utility model provides a neutral point grounding resistance cabinet alarm device includes: the sound alarm module is connected with two ends of the alarm unit in parallel, the sound alarm module is electrically connected with the trigger switch, the sound alarm module is installed in the neutral point grounding resistor cabinet, and when the trigger switch is closed, the sound alarm module simultaneously gives out sound alarm; the alarm loop is connected with the original alarm device in parallel, the alarm loop comprises a newly-added switch and a buzzer, the newly-added switch and the buzzer are connected at two ends of the original alarm device in series, the trigger switch is connected with the newly-added switch in parallel, the newly-added switch is installed in a cabinet of the neutral point grounding resistor cabinet, and the buzzer is installed in a duty room. The utility model discloses install audible alarm module and warning circuit additional at former alarm device, when faults such as ground connection took place for neutral point grounding resistance cabinet, the buzzer of former alarm device, audible alarm module and warning circuit sent alarm signal simultaneously, and operating personnel can know neutral point grounding resistance cabinet trouble very first time.
Description
Technical Field
The utility model relates to a resistance cabinet reports to the police the field, especially relates to a neutral point grounding resistance cabinet alarm device.
Background
The common neutral point grounding mode of the electric power system in China is as follows: the neutral point is directly grounded, the neutral point is not grounded, the neutral point is grounded through an arc suppression coil (resonance grounding), and the neutral point is grounded through a resistor. The neutral point is grounded through a resistor, namely a resistor is connected between the neutral point of the power grid and the ground in series. The resistance value of the connected resistor is properly selected, so that the energy of half-wave behind a single-phase grounding arc can be discharged, the possibility of reignition of the arc is reduced, the amplitude of overvoltage of a power grid is restrained, the sensitivity of the relay protection device can be improved to act on tripping, and the normal operation of a system is effectively protected.
In the safe operation process of chemical substation, neutral point ground resistance cabinet is essential electric protection device, because the defect of design, when the system broke down, neutral point ground resistance cabinet can show the trouble circuit on the computer observes and controls the display screen to trouble (yellow) pilot lamp is bright. And the polling personnel periodically polls and finds out that the system fault time is delayed. In the electricity distribution room, some switch board energy storage pilot lamps are also yellow pilot lamps, have disturbed the judgement of patrolling and examining personnel, if the personnel of patrolling and examining do not carefully observe, can miss system's trouble easily, can't in time discover the trouble, miss optimum emergency time to cause equipment damage, personnel's injury.
Disclosure of Invention
The utility model provides a neutral point grounding resistance cabinet alarm device installs acoustic alarm module and warning circuit additional at former alarm device, when faults such as ground connection take place for neutral point grounding resistance cabinet, not only original alarm device can send fault signal, and acoustic alarm module and warning circuit's bee calling organ sends alarm signal simultaneously, and operating personnel can know the neutral point grounding resistance cabinet trouble very first time.
Realize the utility model discloses the technical scheme of purpose as follows:
a neutral point grounding resistance cabinet alarm device is characterized in that an original alarm device is arranged in a neutral point grounding resistance cabinet and comprises a trigger switch and an alarm unit, wherein when a power supply system of the neutral point grounding resistance cabinet fails, the trigger switch is closed, the original alarm device is switched on, and the alarm unit sends an alarm signal;
neutral point ground resistance cabinet alarm device includes:
the sound alarm module is connected with two ends of the alarm unit in parallel, the sound alarm module is electrically connected with the trigger switch, the sound alarm module is installed in the neutral point grounding resistor cabinet, and when the trigger switch is closed, the sound alarm module simultaneously gives out sound alarm;
the alarm circuit is connected with the original alarm device in parallel, the alarm circuit comprises a newly-added switch and a buzzer, the newly-added switch and the buzzer are connected at two ends of the original alarm device in series, the trigger switch is connected with the newly-added switch in parallel, the newly-added switch is installed in a cabinet of the neutral point grounding resistor cabinet, and the buzzer is installed in a duty room.
As a further improvement, still install protection device in the cabinet of neutral point grounding resistance cabinet, protection device connects between the zero line and the live wire of neutral point grounding resistance cabinet, protection device connects in parallel with warning return circuit and former alarm device.
As a further improvement of the utility model, an operation indicator light and a stop indicator light are further installed on the wall of the neutral point grounding resistance cabinet, and the operation indicator light and the stop indicator light are connected in parallel;
the neutral point grounding resistance cabinet is characterized in that a relay is installed in the neutral point grounding resistance cabinet, a normally open brake-separating contact of the relay and a stop indicating lamp are connected at two ends of the original alarm device in series, and a normally closed brake contact of the relay and an operation indicating lamp are connected at two ends of the original alarm device in series.
As a further improvement, when the normally open separating brake contact of relay is closed, stop indicator light lights, the disconnection of normally closed closing contact, the running indicator light extinguishes.
As a further improvement, the normally closed closing contact of relay is closed, the operation pilot lamp lights, normally open separating brake contact disconnection, stop the pilot lamp and extinguish.
As a further improvement, when the normally open separating brake contact of the relay is closed, the trigger switch is closed, and the alarm unit, the sound alarm module and the buzzer send out alarm signals simultaneously.
As a further improvement, be equipped with the display screen on the cabinet wall of neutral point grounding resistance cabinet, after the power supply system of neutral point grounding resistance cabinet broke down, former alarm device shows trouble return circuit in the display screen.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses install audible alarm module and warning circuit additional at former alarm device, when faults such as ground connection took place for neutral point grounding resistance cabinet, not only former alarm device can send fault signal, and audible alarm module and warning circuit's bee calling organ sends alarm signal simultaneously, and operating personnel can know neutral point grounding resistance cabinet and break down the very first time.
Drawings
Fig. 1 is an alarm schematic diagram of an alarm device of a neutral point grounding resistance cabinet.
In the figure, 1, a live line; 2. a zero line; 3. a protection device; 4. a normally open opening contact; 5. a normally closed closing contact; 6. a trigger switch; 7. an acoustic alarm module; 8. a new switch is added; 9. a buzzer; 10. an alarm unit; 11. an operation indicator light; 12. and stopping the indicator light.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
Example 1:
the neutral point grounding resistor cabinet is internally provided with an original alarm device, the original alarm device comprises a trigger switch 6 and an alarm unit 10, when a power supply system of the neutral point grounding resistor cabinet breaks down, the trigger switch 6 is closed, the original alarm device is switched on, and the alarm unit 10 sends out an alarm signal.
The embodiment provides a neutral point grounding resistor cabinet alarm device, as shown in fig. 1, which comprises an acoustic alarm module 7 and an alarm loop, wherein the acoustic alarm module 7 is connected in parallel at two ends of an alarm unit 10, the acoustic alarm module 7 is electrically connected with a trigger switch 6, the acoustic alarm module 7 is installed in a neutral point grounding resistor cabinet, and when the trigger switch 6 is closed, the acoustic alarm module 7 gives out sound alarm at the same time; the alarm loop is connected with the original alarm device in parallel, the alarm loop comprises a newly-added switch 8 and a buzzer 9, the newly-added switch 8 and the buzzer 9 are connected at two ends of the original alarm device in series, the trigger switch 6 is connected with the newly-added switch 8 in parallel, the newly-added switch 8 is installed in a cabinet of the neutral point grounding resistor cabinet, and the buzzer 9 is installed in a duty room.
This embodiment installs acoustic alarm module 7 and warning loop additional at former alarm device, and when faults such as ground connection took place for neutral point grounding resistance cabinet, alarm signal was sent simultaneously to former alarm device, acoustic alarm module 7 and warning loop's bee calling organ 9, and operating personnel can know the neutral point grounding resistance cabinet at the very first time and break down.
Example 2:
on the basis of the scheme disclosed in embodiment 1, the present embodiment discloses the following:
as shown in fig. 1, a protection device 3 is further installed in the neutral point grounding resistance cabinet, the protection device 3 is connected between a zero line 2 and a live line 1 of the neutral point grounding resistance cabinet, and the protection device 3 is connected in parallel with an alarm loop and an original alarm device.
As shown in fig. 1, an operation indicator lamp 11 and a stop indicator lamp 12 are further mounted on the wall of the neutral point grounding resistor cabinet, and the operation indicator lamp 11 and the stop indicator lamp 12 are connected in parallel; the neutral point grounding resistance cabinet is internally provided with a relay, a normally open opening contact 4 and a stop indicator lamp 12 of the relay are connected in series at two ends of the original alarm device, and a normally closed closing contact 5 and an operation indicator lamp 11 of the relay are connected in series at two ends of the original alarm device.
Specifically, when the normally open opening contact 4 of the relay is closed, the stop indicator lamp 12 is turned on, the normally closed closing contact 5 is turned off, and the operation indicator lamp 11 is turned off. And a normally closed closing contact 5 of the relay is closed, the operation indicator lamp 11 is lighted, the normally open opening contact 4 is disconnected, and the stop indicator lamp 12 is turned off. When the normally open opening contact 4 of the relay is closed, the trigger switch 6 is closed, and the alarm unit 10, the sound alarm module 7 and the buzzer 9 send out alarm signals at the same time.
Specifically, a display screen is arranged on the wall of the neutral point grounding resistor cabinet, and after a power supply system of the neutral point grounding resistor cabinet breaks down, the original alarm device displays a fault loop in the display screen. When the neutral point grounding resistance cabinet breaks down, the neutral point grounding resistance cabinet displays zero sequence current and grounding time in the display screen, and the specific equipment fault is judged through the small current line selection device while faults such as overvoltage limitation, resonance elimination and the like are limited.
Example 3:
when the neutral point grounding resistance cabinet reports to the police, personnel can only discover the trouble through seeing the switch board at the in-process of patrolling and examining, because patrol and examine the cycle and patrol and examine the more reason of equipment, personnel can't discover the trouble the very first time, probably cause bigger incident. The embodiment makes up the design defect of the neutral point grounding resistance cabinet, and has the advantages of convenience in installation, strong practicability and simple structure. The personnel can rapidly know the occurrence of the fault through sound, and can find the fault in time and effectively inhibit the occurrence of the fault. The expected purpose of ensuring the stable operation of the system is achieved, and the influence on the stable operation of the system caused by the failure of finding equipment in time is avoided.
Specifically, an acoustic alarm module 7 is additionally arranged on the original alarm device, and one path of alarm loop is added in a duty room. When faults such as grounding occur to the neutral point grounding resistor cabinet, not only can fault information exist in the display screen, but also emergent buzzing sound is generated, personnel know that the system fails in the first time, and can observe the protection device 3 in the first time to know the fault reason. And small faults are eliminated in time.
As shown in fig. 1, the neutral point grounding resistance cabinet of the present embodiment is composed of an original alarm device (composed of a fault relay, a buzzer 9, and a motor protector), a relay, a fuse, an auxiliary contact (normally open), and a plurality of wires. Only the protection device 3 alarms, and the alarm is changed into an acoustic alarm and optical alarm system. The display screen of the neutral point grounding resistance cabinet is arranged on the wall of the cabinet.
Because the equipment fault in a short time can not cause great influence on the whole power supply system of the neutral point grounding resistance cabinet, the whole power supply system can be recovered to be stable only by timely cutting off the fault equipment. Therefore, it is important that the fault information in the neutral point cabinet is found by the personnel for the first time.
On the basis of the solutions disclosed in example 1 and example 2, the present example discloses the following: firstly, a motor protector device is connected in parallel with a microcomputer measurement and control device in a neutral point grounding resistance cabinet and is responsible for collecting zero sequence current, a certain fixed value is set, and when the zero sequence current exceeds the set value, a fault relay of the motor protector acts, so that zero sequence protection acts. And secondly, alternating current power supplies of a fault relay normally-open point, a common end, the buzzer 9 and the DC220V of the motor protector are connected in series to form a loop.
When a 10KV system has a fault, the microcomputer measurement and control device of the neutral point grounding resistance cabinet detects the fault, the parallel motor protector can also acquire zero-sequence current, a fault relay in the motor protector acts, a normally open point is changed into normally closed, a signal is output, and a buzzer 9 gives an alarm. Personnel can find out the trouble through the sound of whistling very first time. When the neutral point grounding resistance cabinet gives a fault alarm, personnel can find the fault alarm in time and can remove the fault quickly and effectively.
And a loop (a fault relay normally-open point of the motor protector, a public end, a buzzer 9 and an alternating current power supply of the DC220V are connected in series to form a loop) is connected in parallel, and the buzzer 9 of the loop is installed in a duty room where people are frequently located. The personnel may also know that the system is malfunctioning without being in the distribution room.
Personnel can know that the power supply system is out of order through whistling at the first time. When the power supply system breaks down, personnel can find the fault in time and give an alarm, and the fault can be removed quickly and effectively. The method avoids larger safety accidents caused by time delay of the fault of the high-voltage cabinet. The expected purpose of ensuring the stable operation of the system is achieved.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A neutral point grounding resistance cabinet alarm device is characterized in that an original alarm device is arranged in a neutral point grounding resistance cabinet and comprises a trigger switch and an alarm unit, wherein when a power supply system of the neutral point grounding resistance cabinet fails, the trigger switch is closed, the original alarm device is switched on, and the alarm unit sends an alarm signal; its characterized in that, neutral point ground resistance cabinet alarm device includes:
the sound alarm module is connected with two ends of the alarm unit in parallel, the sound alarm module is electrically connected with the trigger switch, the sound alarm module is installed in the neutral point grounding resistor cabinet, and when the trigger switch is closed, the sound alarm module simultaneously gives out sound alarm;
the alarm circuit is connected with the original alarm device in parallel, the alarm circuit comprises a newly-added switch and a buzzer, the newly-added switch and the buzzer are connected at two ends of the original alarm device in series, the trigger switch is connected with the newly-added switch in parallel, the newly-added switch is installed in a cabinet of the neutral point grounding resistor cabinet, and the buzzer is installed in a duty room.
2. The neutral grounding resistor cabinet alarm device according to claim 1, wherein a protection device is further installed in the neutral grounding resistor cabinet, the protection device is connected between the zero line and the live line of the neutral grounding resistor cabinet, and the protection device is connected in parallel with the alarm loop and the original alarm device.
3. The neutral point grounding resistor cabinet alarm device as claimed in claim 1, wherein an operation indicator lamp and a stop indicator lamp are further mounted on the cabinet wall of the neutral point grounding resistor cabinet, and the operation indicator lamp and the stop indicator lamp are connected in parallel;
the neutral point grounding resistance cabinet is characterized in that a relay is installed in the neutral point grounding resistance cabinet, a normally open brake-separating contact of the relay and a stop indicating lamp are connected at two ends of the original alarm device in series, and a normally closed brake contact of the relay and an operation indicating lamp are connected at two ends of the original alarm device in series.
4. The neutral point grounding resistor cabinet alarm device as claimed in claim 3, wherein when the normally open opening contact of the relay is closed, the stop indicator lamp is turned on, the normally closed closing contact is turned off, and the operation indicator lamp is turned off.
5. The neutral point grounding resistor cabinet alarm device as claimed in claim 3, wherein the normally closed switch-on contact of the relay is closed, the operation indicator lamp is on, the normally open switch-off contact is open, and the stop indicator lamp is off.
6. The neutral point grounding resistor cabinet alarm device as claimed in claim 3, wherein when the normally open opening contact of the relay is closed, the trigger switch is closed, and the alarm unit, the acoustic alarm module and the buzzer send out alarm signals at the same time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020396461.6U CN211375761U (en) | 2020-03-25 | 2020-03-25 | Neutral point grounding resistance cabinet alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020396461.6U CN211375761U (en) | 2020-03-25 | 2020-03-25 | Neutral point grounding resistance cabinet alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211375761U true CN211375761U (en) | 2020-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020396461.6U Active CN211375761U (en) | 2020-03-25 | 2020-03-25 | Neutral point grounding resistance cabinet alarm device |
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| Country | Link |
|---|---|
| CN (1) | CN211375761U (en) |
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2020
- 2020-03-25 CN CN202020396461.6U patent/CN211375761U/en active Active
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