CN204424881U - A kind of SF 6circuit breaker monitoring system - Google Patents
A kind of SF 6circuit breaker monitoring system Download PDFInfo
- Publication number
- CN204424881U CN204424881U CN201520158710.7U CN201520158710U CN204424881U CN 204424881 U CN204424881 U CN 204424881U CN 201520158710 U CN201520158710 U CN 201520158710U CN 204424881 U CN204424881 U CN 204424881U
- Authority
- CN
- China
- Prior art keywords
- intermediate relay
- normally open
- control device
- circuit breaker
- microcomputer protection
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Gas-Insulated Switchgears (AREA)
Abstract
This application discloses a kind of SF
6circuit breaker monitoring system, comprises DC power supply, the first auxiliary relay, the second auxiliary relay, SF
6density controller and microcomputer protecting controller, work as SF
6density controller detects monitored SF
6sF in circuit breaker
6when gas pressure value is lower than pressure alarm set point, SF
6first group of normally opened contact of density controller closes, and the coil of the first auxiliary relay obtains electric, and the normally opened contact of the first auxiliary relay closes, and microcomputer protecting controller exports low pressure alarm signal; Work as SF
6density controller detects monitored SF
6sF in circuit breaker
6when gas pressure value is lower than pressure atresia action set point, SF
6second group of normally opened contact of density controller closes, and the coil of the second auxiliary relay obtains electric, and the normally opened contact of the second auxiliary relay closes, and microcomputer protecting controller exports low pressure block signal.
Description
Technical Field
The utility model relates to an SF6The technical field of circuit breakers, more specifically to an SF6A circuit breaker monitoring system.
Background
SF6The circuit breaker is an insulating medium circuit breaker, belonging to the class of air blast circuit breakers, SF, as air circuit breakers6SF for circuit breaker6The gas has strong advantages in insulating properties, arc quenching properties and chemical properties compared with other insulating media, and thus, SF6Circuit breakers have been rapidly developed in recent years.
If SF6Gas leakage, which will result in SF6The gas pressure in the circuit breaker drops and when the pressure drops to a certain value, the SF6The circuit breaker will not allow the opening and closing operation, therefore SF6Whether the gas pressure is normal or not can become a restriction link influencing the safety and stable power supply of the electrical equipment.
Currently, the general expression is in SF6SF is arranged on the breaker6Density controller by periodic patrol of SF6Gas pressure detected by the density controller for SF6And monitoring whether the gas leaks. Since the regular inspection cannot grasp SF in real time6SF in circuit breaker6Gas pressure condition, therefore, SF exists6SF occurs when the circuit breaker is not patrolled6Potential safety hazards of gas leakage. Another way is to modify the gas monitoring technology to SF6SF in circuit breaker6The gas pressure is monitored in real time, but due to imperfect technical measures, the stability of the monitoring system is poor, and SF is caused6The monitoring effect of the gas cannot meet the requirements. Thus how to provide an SF6Circuit breaker monitoring system realizes SF6Real-time monitoring of gases is a technical problem that those skilled in the art are demanding to solve.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides an SF6Circuit breaker monitoring system to realize SF6And (4) monitoring the gas in real time.
SF (sulfur hexafluoride)6Circuit breaker monitoring system, including: DC power supply, first intermediate relay, second intermediate relay, SF6Density controller and microcomputer protection measurement and control device;
the positive pole of the DC power supply is connected with the SF through the coil of the first intermediate relay6One end of a first set of normally open contacts of a density controller, said SF6The other end of the first group of normally open contacts of the density controller is connected with the negative electrode of the direct current power supply, and the SF6A first set of normally open contacts of a density controller for use at said SF6The density controller detects the monitored SF6SF in circuit breaker6Closing when the gas pressure value is lower than the pressure alarm set value;
one end of the coil of the second intermediate relay is connected in parallel with one end of the coil of the first intermediate relay, and the other end of the coil of the second intermediate relay is connected with the SF6One end of a second set of normally open contacts of a density controller, said SF6The other end of the second group of normally open contacts of the density controller is connected with SF6The other ends of the first group of normally open contacts of the density controller are connected in parallel, and the SF6A second set of normally open contacts of the density controller for use at the SF6The density controller detects the monitored SF6SF in circuit breaker6Closing when the gas pressure value is lower than a pressure locking action set value which is smaller than the pressure alarm set value;
a positive power line connecting terminal of the microcomputer protection measurement and control device is respectively connected with the positive electrode of the direct current power supply and the normally open contact of the first intermediate relay, a negative power line connecting terminal is connected with the negative electrode of the direct current power supply, and the microcomputer protection measurement and control device is used for outputting a low-air-pressure alarm signal when the normally open contact of the first intermediate relay is detected to be closed;
and a positive power line terminal of the microcomputer protection and measurement and control device is connected with a normally open contact of the second intermediate relay, and the microcomputer protection and measurement and control device is used for outputting a low-air-pressure locking signal when detecting that the normally open contact of the second intermediate relay is closed.
Preferably, the first and second liquid crystal materials are,
one end of a first normally closed contact of the second intermediate relay is connected with the positive electrode of the direct-current power supply, and the other end of the first normally closed contact of the second intermediate relay passes through the monitored SF6A closing loop of the breaker is connected with the negative electrode of the direct-current power supply;
one end of a second normally closed contact of the second intermediate relay is connected with the positive electrode of the direct-current power supply, and the other end of the second normally closed contact of the second intermediate relay passes through the monitored SF6And the opening loop of the breaker is connected with the negative electrode of the direct current power supply.
Preferably, the method further comprises the following steps:
and the background monitor is connected with the microcomputer protection, measurement and control device and used for receiving the low-pressure alarm signal and the low-pressure locking signal output by the microcomputer protection, measurement and control device and carrying out corresponding alarm and character display.
Preferably, a communication manager for sorting and collecting the received signals is arranged between the microcomputer protection measurement and control device and the background monitor.
Preferably, the communication manager is respectively connected with the microcomputer protection measurement and control device and the background monitor through communication lines.
Preferably, the first and second liquid crystal materials are,
the microcomputer protection measurement and control device is connected with a normally open contact of the first intermediate relay through a first wiring terminal row and a second wiring terminal row connected with the first wiring terminal row;
the microcomputer protection measurement and control device is connected with the normally open contact of the second intermediate relay through the first wiring terminal row and the second wiring terminal row connected with the first wiring terminal row.
According to the above technical solution, the utility model provides a SF6The circuit breaker monitoring system comprises a DC power supply, a first intermediate relay, a second intermediate relay, and an SF6Density controller and microcomputer protection measurement and control device, when SF6The density controller detects the monitored SF6SF in circuit breaker6When the gas pressure value is lower than the pressure alarm set value, SF6A first group of normally open contacts of the density controller are closed, a coil of the first intermediate relay is electrified, the normally open contacts of the first intermediate relay are closed, and the microcomputer protection measurement and control device outputs a low-pressure alarm signal; when SF6The density controller detects the monitored SF6SF in circuit breaker6When the gas pressure value is lower than the pressure locking action set value, SF6And a second group of normally open contacts of the density controller are closed, a coil of the second intermediate relay is electrified, the normally open contacts of the second intermediate relay are closed, and the microcomputer protection measurement and control device outputs a low-air-pressure locking signal. It can be seen that SF6Density controller by real-time detection of SF6The gas pressure value is compared with the pressure set value to realize the control of electrifying the coil of the corresponding intermediate relay, so that the microcomputer protection and measurement and control device outputs a low-pressure alarm signal or a low-pressure locking signal, and the whole monitoring process of the monitoring system is stable and reliable, therefore, an operator on duty can observe SF (sulfur hexafluoride) in real time by obtaining the signal output by the microcomputer protection and measurement and control device without going to the field for inspection6The gas pressure fault of the circuit breaker is judged, so that effective measures are taken in time to ensure SF6The safe and reliable operation of the circuit breaker.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 shows an SF according to an embodiment of the present invention6The structure schematic diagram of the circuit breaker monitoring system;
FIG. 2 shows another SF according to an embodiment of the present invention6The structure of the circuit breaker monitoring system is schematic.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model discloses SF6Circuit breaker monitoring system to realize SF6And (4) monitoring the gas in real time.
Referring to fig. 1, an embodiment of the present invention provides an SF6The schematic structural diagram of the circuit breaker monitoring system comprises: direct-current power supply KM, first intermediate relay 1ZJ, second intermediate relay 2ZJ and SF6A density controller MTK and a microcomputer protection measurement and control device 11;
wherein,
the positive pole of the DC power supply KM passes through the coil (two coils) of the first intermediate relay 1ZJEnding with labels 2 and 1) in FIG. 1 with a linker SF6One end of the first set of normally open contacts of the density controller MTK (reference &infig. 1), SF6The other end (marked in figure 1) of the first group of normally open contacts of the density controller MTK is connected with the negative electrode of the direct-current power supply KM, SF6The first set of normally open contacts of the density controller MTK is used at SF6Density controller MTK detects monitored SF6SF in circuit breaker6And closing when the gas pressure value is lower than the pressure alarm set value.
Here, SF6The density controller MTK is installed in the monitored SF6On the circuit breaker to detect the monitored SF6SF in circuit breaker6The gas pressure value.
The pressure alarm set value needs to be lower than the gas rated pressure value (generally 0.5MPa) under the normal condition, and the specific numerical value is determined according to the actual need, for example, 0.45MPa, and the utility model discloses do not do the restriction here.
The supply voltage of the direct-current power supply KM is 220V.
One end (reference numeral 3 in fig. 1) of the coil of the second intermediate relay 2ZJ is connected in parallel with one end (reference numeral 2 in fig. 1) of the coil of the first intermediate relay 1ZJ, and the other end (reference numeral 4 in fig. 1) of the coil of the second intermediate relay 2ZJ is connected to SF6One end (symbol (r) in fig. 1) of the second set of normally open contacts of the density controller MTK is connected, SF6The other end (marked by the third mark in figure 1) of the second group of normally open contacts of the density controller MTK and SF6The other ends of the first set of normally open contacts of the density controller MTK (marked (r) in fig. 1) are connected in parallel, SF6The second set of normally open contacts of the density controller MTK is used at SF6Density controller MTK detects monitored SF6SF in circuit breaker6And closing when the gas pressure value is lower than a pressure locking action set value which is smaller than the pressure alarm set value.
The pressure locking set value is determined according to actual needs, for example, 0.4MPa, and the present invention is not limited herein.
A positive power line terminal P1 of the microcomputer protection and measurement and control device 11 is respectively connected with the positive pole of the direct-current power supply KM and the normally open contacts (marks three and four in figure 1) of the first intermediate relay 1ZJ, a negative power line terminal P2 is connected with the negative pole of the direct-current power supply KM, and the microcomputer protection and measurement and control device 11 is used for outputting a low-pressure alarm signal when detecting that the normally open contacts of the first intermediate relay 1ZJ are closed;
the microcomputer protection and control device 11 positive power line terminal P1 is connected with the normally open contacts (marks (c) and (b) in fig. 1) of the second intermediate relay 2ZJ, and the microcomputer protection and control device 11 is used for outputting a low-pressure locking signal when detecting that the normally open contacts of the second intermediate relay 2ZJ are closed.
It should be noted that, in this embodiment, the direct-current power supply KM, the microcomputer protection measurement and control device 11, and the normally open contact of the first intermediate relay 1ZJ form a low-pressure alarm loop;
and the direct-current power supply KM, the microcomputer protection measurement and control device 11 and the normally open contact of the second intermediate relay 2ZJ form a low-pressure locking signal loop.
SF6The working principle of the circuit breaker monitoring system is as follows:
when SF6Density controller MTK detects monitored SF6SF in circuit breaker6When the gas pressure value is lower than the pressure alarm set value, SF6A first group of normally open contacts of the density controller MTK is closed, a coil of the first intermediate relay 1ZJ is electrified, the normally open contacts of the first intermediate relay 1ZJ are closed, and the microcomputer protection measurement and control device 11 outputs a low-pressure alarm signal; if SF6The gas pressure value continues to drop when SF6Density controller MTK detects monitored SF6SF in circuit breaker6When the gas pressure value is lower than the pressure locking action set value, SF6And a second group of normally open contacts of the density controller MTK is closed, a coil of the second intermediate relay 2ZJ is electrified, the normally open contacts of the second intermediate relay 2ZJ are closed, and the microcomputer protection measurement and control device 11 outputs a low-air-pressure locking signal.
To sum up, canIt is seen that SF6Density controller MTK real-time detection SF6The gas pressure value is compared with the pressure set value to realize the control of electrifying the coil of the corresponding intermediate relay, so that the microcomputer protection and measurement and control device 11 outputs a low-pressure alarm signal or a low-pressure locking signal, and the whole monitoring process of the monitoring system is stable and reliable, therefore, an operator on duty can watch SF by learning the signal output by the microcomputer protection and measurement and control device 11 in real time without going to a field for inspection6The gas pressure fault of the circuit breaker is judged, so that effective measures are taken in time to ensure SF6The safe and reliable operation of the circuit breaker.
To further ensure SF6Safe and reliable operation of circuit breaker, the utility model provides a SF6SF being monitored by circuit breaker monitoring system6When the gas pressure value is abnormal, SF can be automatically cut off6The circuit breaker comprises a closing loop and an opening loop.
Referring to fig. 2, another embodiment of the present invention discloses an SF6The schematic structural diagram of the circuit breaker monitoring system further includes, on the basis of the embodiment shown in fig. 1:
one end (marked in figure 2, the fourth) of the first normally closed contact of the second intermediate relay 2ZJ is connected with the positive pole of the direct current power supply KM, and the other end (marked in figure 2, the third) of the first normally closed contact of the second intermediate relay 2ZJ passes through the monitored SF6A closing loop of the breaker is connected with the negative electrode of the direct-current power supply KM;
one end (labeled in fig. 2) of the second normally closed contact of the second intermediate relay 2ZJ is connected to the positive electrode of the dc power supply KM, and the other end (labeled in fig. 2) of the second normally closed contact of the second intermediate relay 2ZJ is connected to the positive electrode of the dc power supply KM through the monitored SF6And an opening loop of the breaker is connected with the negative electrode of the direct-current power supply KM.
Wherein the SF is monitored6The closing circuit of circuit breaker includes: monitored SF6Closing loop coil HQ and monitored SF of circuit breaker6Normally closed contact QF1 of circuit breaker, monitored SF6Normally closed of circuit breakerOne end of the contact QF1 is connected to the other end (symbol c in fig. 2) of the first normally closed contact of the second intermediate relay 2ZJ, and the monitored SF6The other end of the normally closed contact QF1 of the circuit breaker passes through the monitored SF6And a closing loop coil HQ of the circuit breaker is connected with the negative electrode of the direct-current power supply KM.
Monitored SF6The separating brake circuit of the circuit breaker comprises: monitored SF6Breaker opening loop coil TQ and monitored SF6Normally open contact QF2 of circuit breaker, monitored SF6One end of the normally open contact QF2 of the circuit breaker is connected to the other end (sign (c) in fig. 2) of the second normally closed contact of the second intermediate relay 2ZJ, and the monitored SF6The other end of the normally open contact QF2 of the circuit breaker passes through the monitored SF6And a switching-off loop coil TQ of the circuit breaker is connected with the negative electrode of the direct-current power supply KM.
To facilitate background personnel to know SF at any time6SF in circuit breaker6The gas pressure condition, on the basis of the above embodiment, further includes: a background monitor 12;
the background monitor 12 is placed in the control room, connected with the microcomputer protection and monitoring device 11, and used for receiving the low-pressure alarm signal and the low-pressure locking signal output by the microcomputer protection and monitoring device 11, and performing corresponding alarm and text display.
Wherein, the alarm signal sent by the background monitor 12 can be an optical alarm, an acoustic alarm or an acousto-optic alarm.
The background monitor 12 can convert the received low-pressure alarm signal and low-pressure blocking signal into corresponding characters to be displayed on the screen, and the displayed subtitles can appear in a flashing mode for conveniently reminding background personnel.
In order to further optimize the above embodiment, a communication manager 13 is disposed between the microcomputer protection monitoring and controlling device 11 and the background monitor 12, and is configured to sort and summarize the received signals output by the communication manager 13, and transmit the collected signals to the background monitor 12.
The microcomputer protection, monitoring and control device 11 is provided with a CAN (Controller Area Network) communication interface (S3 and S4 in fig. 2), the microcomputer protection, monitoring and control device 11 is connected with the communication manager 13 through a CAN communication line, and meanwhile, the communication manager 13 is connected with the background monitor 12 through a communication line.
As can be understood by those skilled in the art, in the field, the installation position of the microcomputer protection and control device 11 is far away from the installation positions of the first intermediate relay 1ZJ and the second intermediate relay 2ZJ, and therefore, the connection between the microcomputer protection and control device 11 and the first intermediate relay 1ZJ and the second intermediate relay 2ZJ needs to be realized through the terminal block.
In the utility model, the microcomputer protection measurement and control device 11 is connected with the normally open contacts (marked three and four in fig. 2) of the first intermediate relay 1ZJ through the first wiring terminal row 31D and the second wiring terminal row XDP connected with the first wiring terminal row 31D;
the microcomputer protection measurement and control device 11 is connected with the normally open contacts (symbol (c) and (b) in fig. 2) of the second intermediate relay 2ZJ through the first terminal block 31D and the second terminal block XDP connected with the first terminal block 31D.
Specifically, it is assumed that the numbers of the connection terminals set on the first connection terminal row 31D are respectively 27, 35 and 37, the numbers of the connection terminals set on the second connection terminal row XDP are respectively 31, 35, 36 and 37, and the numbers of the connection terminals set on the microcomputer protection measurement and control device 11 are respectively 31nP1, 31nD2 and 31nD 3;
the microcomputer protection measurement and control device 11 is specifically connected with the first intermediate relay 1ZJ and the second intermediate relay 2ZJ through the first connection terminal row 31D and the second connection terminal row XDP which are connected with each other as follows:
the direct current positive power supplies of the low-pressure alarm circuit and the low-pressure locking circuit are all from a P1 wiring terminal of the microcomputer protection and measurement and control device 11, a P1 is connected with a 31nP1, a 31nP1 is connected to a No. 27 terminal of a first wiring terminal row 31D and then connected to a No. 31 terminal of a second wiring terminal row XDP, then the normally open contacts (marks (c) and (c) in figure 2) of a first intermediate relay 1ZJ are connected to a No. 35 terminal of the second wiring terminal row XDP and then connected to a No. 35 terminal of a first wiring terminal row 31D, and the No. 35 terminal of the first wiring terminal row 31D is connected to a 31nD2 terminal of the microcomputer protection and measurement and control device 11, so that the low-pressure alarm circuit is formed;
the No. 31 terminal and the No. 36 terminal of the second terminal strip XDP are connected, the No. 36 terminal of the second terminal strip XDP is connected to the No. 37 terminal of the second terminal strip XDP through the normally open contact (marks (c) and (b) in fig. 2) of the second intermediate relay 2ZJ and then connected to the No. 37 terminal of the first terminal strip 31D, and the No. 37 terminal of the first terminal strip 31D is connected to the No. 31nD3 terminal of the microcomputer protection measurement and control device 11, so that a low-air-pressure locking loop is formed.
When SF6Density controller MTK detects monitored SF6SF in circuit breaker6When the gas pressure value is lower than the pressure alarm set value, SF6The first group of normally open contacts of the density controller MTK is closed, the coil of the first intermediate relay 1ZJ is electrified, the normally open contacts (marks three and four in fig. 2) of the first intermediate relay 1ZJ are closed, the direct current positive power supply is connected to the No. 35 terminal of the second wiring terminal row XDP, the No. 35 terminal of the first wiring terminal row 31D is connected to the No. 31nD2 terminal of the microcomputer protection and monitoring device 11, the low-pressure alarm loop is conducted, the microcomputer protection and monitoring device 11 outputs a low-pressure alarm signal, the low-pressure alarm signal is transmitted to the communication manager 13 through the CAN communication interface, the communication manager 13 sorts and summarizes the low-pressure alarm signal and transmits the summarized low-pressure alarm signal to the background monitor 12 through the communication line, and the background monitor 12 sends out a low-pressure alarm and performs corresponding character display;
when SF6Detection of SF by the Density controller MTK6The gas pressure value continues to drop, and when the gas pressure value drops to the set value of the pressure locking action, SF6The second group of normally open contacts of the density controller MTK is closed, the coil of the second intermediate relay 2ZJ is energized, the normally open contacts (marks (c) and (b) in fig. 2) of the second intermediate relay 2ZJ are closed, the direct-current positive power supply is connected to the terminal number 37 of the second terminal strip XDP, and the first terminal strip 31D is connected to the terminal number 37 of the first terminal strip XDPThe No. 37 terminal is connected to a 31nD3 terminal of the microcomputer protection and monitoring device 11, a low-pressure locking loop is conducted, the microcomputer protection and monitoring device 11 outputs a low-pressure locking signal, the low-pressure locking signal is transmitted to the communication manager 13 through the CAN communication interface, the communication manager 13 arranges and aggregates the low-pressure locking signal and transmits the low-pressure locking signal to the background monitor 12 through the communication line, and the background monitor 12 sends out a low-pressure locking alarm and performs corresponding text display.
In summary, SF can be seen6Density controller MTK real-time detection SF6The gas pressure value is compared with the pressure set value to realize the control of electrifying the coil of the corresponding intermediate relay, so that the microcomputer protection and measurement and control device 11 outputs a low-pressure alarm signal or a low-pressure locking signal, and the whole monitoring process of the monitoring system is stable and reliable, therefore, an operator on duty can watch SF by learning the signal output by the microcomputer protection and measurement and control device 11 in real time without going to a field for inspection6The gas pressure fault of the circuit breaker is judged, so that effective measures are taken in time to ensure SF6The safe and reliable operation of the circuit breaker.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. SF (sulfur hexafluoride)6Circuit breaker monitoring system, its characterized in that includes: DC power supply, first intermediate relay, second intermediate relay, SF6Density controller and microcomputer protection measurement and control device;
the positive pole of the DC power supply is connected with the SF through the coil of the first intermediate relay6One end of a first set of normally open contacts of a density controller, said SF6The other end of the first group of normally open contacts of the density controller is connected with the negative electrode of the direct current power supply, and the SF6First set of normally open contacts of density controllerFor use in the SF6The density controller detects the monitored SF6SF in circuit breaker6Closing when the gas pressure value is lower than the pressure alarm set value;
one end of the coil of the second intermediate relay is connected in parallel with one end of the coil of the first intermediate relay, and the other end of the coil of the second intermediate relay is connected with the SF6One end of a second set of normally open contacts of a density controller, said SF6The other end of the second group of normally open contacts of the density controller is connected with SF6The other ends of the first group of normally open contacts of the density controller are connected in parallel, and the SF6A second set of normally open contacts of the density controller for use at the SF6The density controller detects the monitored SF6SF in circuit breaker6Closing when the gas pressure value is lower than a pressure locking action set value which is smaller than the pressure alarm set value;
a positive power line connecting terminal of the microcomputer protection measurement and control device is respectively connected with the positive electrode of the direct current power supply and the normally open contact of the first intermediate relay, a negative power line connecting terminal is connected with the negative electrode of the direct current power supply, and the microcomputer protection measurement and control device is used for outputting a low-air-pressure alarm signal when the normally open contact of the first intermediate relay is detected to be closed;
and a positive power line terminal of the microcomputer protection and measurement and control device is connected with a normally open contact of the second intermediate relay, and the microcomputer protection and measurement and control device is used for outputting a low-air-pressure locking signal when detecting that the normally open contact of the second intermediate relay is closed.
2. SF according to claim 16A circuit breaker monitoring system, characterized in that,
one end of a first normally closed contact of the second intermediate relay is connected with the positive electrode of the direct-current power supply, and the other end of the first normally closed contact of the second intermediate relay passes through the monitored SF6A closing loop of the breaker is connected with the negative electrode of the direct-current power supply;
one end of a second normally closed contact of the second intermediate relay is connected with theThe other end of the second normally closed contact of the second intermediate relay passes through the monitored SF6And the opening loop of the breaker is connected with the negative electrode of the direct current power supply.
3. SF according to claim 16Circuit breaker monitoring system, its characterized in that still includes:
and the background monitor is connected with the microcomputer protection, measurement and control device and used for receiving the low-pressure alarm signal and the low-pressure locking signal output by the microcomputer protection, measurement and control device and carrying out corresponding alarm and character display.
4. SF according to claim 36The circuit breaker monitoring system is characterized in that a communication manager for arranging and collecting received signals is arranged between the microcomputer protection measurement and control device and the background monitor.
5. SF according to claim 46The circuit breaker monitoring system is characterized in that the communication manager is respectively connected with the microcomputer protection measurement and control device and the background monitor through communication lines.
6. SF according to claim 16A circuit breaker monitoring system, characterized in that,
the microcomputer protection measurement and control device is connected with a normally open contact of the first intermediate relay through a first wiring terminal row and a second wiring terminal row connected with the first wiring terminal row;
the microcomputer protection measurement and control device is connected with the normally open contact of the second intermediate relay through the first wiring terminal row and the second wiring terminal row connected with the first wiring terminal row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520158710.7U CN204424881U (en) | 2015-03-20 | 2015-03-20 | A kind of SF 6circuit breaker monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520158710.7U CN204424881U (en) | 2015-03-20 | 2015-03-20 | A kind of SF 6circuit breaker monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204424881U true CN204424881U (en) | 2015-06-24 |
Family
ID=53475211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520158710.7U Withdrawn - After Issue CN204424881U (en) | 2015-03-20 | 2015-03-20 | A kind of SF 6circuit breaker monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204424881U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701821A (en) * | 2015-03-20 | 2015-06-10 | 山东钢铁股份有限公司 | SF6 circuit breaker monitoring system |
| CN110095679A (en) * | 2019-05-15 | 2019-08-06 | 国电南瑞科技股份有限公司 | A kind of current supply circuit detection device and method |
-
2015
- 2015-03-20 CN CN201520158710.7U patent/CN204424881U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701821A (en) * | 2015-03-20 | 2015-06-10 | 山东钢铁股份有限公司 | SF6 circuit breaker monitoring system |
| CN104701821B (en) * | 2015-03-20 | 2018-05-01 | 山东钢铁股份有限公司 | A kind of SF6Breaker monitors system |
| CN110095679A (en) * | 2019-05-15 | 2019-08-06 | 国电南瑞科技股份有限公司 | A kind of current supply circuit detection device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105305620B (en) | A kind of breaker closing control loop template monitoring system | |
| CN109884521B (en) | Circuit breaker divide-shut brake control circuit broken wire monitoring alarm circuit | |
| CN107290676B (en) | Method and device for detecting fusing and open circuit of main fuse of storage battery pack | |
| CN108550244B (en) | Safety grounding monitoring alarm device with multiple channels | |
| CN109870647A (en) | A monitoring system for circuit breaker opening electrical circuit faults | |
| CN110190588A (en) | Breaker intelligent monitoring and protective module | |
| CN106483423A (en) | A kind of trouble shoot method and device of breaker open operation electric loop | |
| CN107069965B (en) | Step voltage leakage alarm device for power distribution network and power distribution network leakage monitoring system in power supply district | |
| CN105116818A (en) | Monitoring method and system of alternating current contactor | |
| CN205051440U (en) | Breaker closing control circuit monitoring system that breaks | |
| CN209803293U (en) | Circuit breaker closing and opening control circuit broken wire monitoring and alarming circuit | |
| CN204424881U (en) | A kind of SF 6circuit breaker monitoring system | |
| CN206892292U (en) | A kind of batteries main fuse fusing and open circuit detecting device | |
| CN109708687A (en) | Monitoring system of pole-mounted switch | |
| CN107147204B (en) | A kind of DC power switching device and DC power supply | |
| CN104701821B (en) | A kind of SF6Breaker monitors system | |
| CN209946326U (en) | Breaker opening electric loop fault monitoring system | |
| CN208723536U (en) | A kind of electromotor integrated protection system for extractive equipment | |
| CN106774026A (en) | A kind of intelligent line controller | |
| CN214375146U (en) | Drop-out fuse on-line monitoring terminal system | |
| CN213734958U (en) | Equipotential control system of rail transit platform | |
| CN106199481A (en) | A kind of operation of current transformers condition monitoring system and control method thereof | |
| CN109610542A (en) | CAN line fault positioning system and method for double-wheel slot milling machine | |
| CN106526291A (en) | Bypass operation low voltage rapid conversion device, and monitoring, releasing and displaying methods thereof | |
| CN102608459B (en) | Status monitoring method for spark gap trigger circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150624 Effective date of abandoning: 20180501 |