CN203811729U - Device for monitoring DC power supply of relay protection test power supply panel - Google Patents
Device for monitoring DC power supply of relay protection test power supply panel Download PDFInfo
- Publication number
- CN203811729U CN203811729U CN201420067966.2U CN201420067966U CN203811729U CN 203811729 U CN203811729 U CN 203811729U CN 201420067966 U CN201420067966 U CN 201420067966U CN 203811729 U CN203811729 U CN 203811729U
- Authority
- CN
- China
- Prior art keywords
- relay
- power supply
- acousto
- auxiliary contact
- protection test
- 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.)
- Expired - Fee Related
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a device for monitoring a DC power supply of a relay protection test power supply panel. The device comprises a measuring unit and a relay set unit. The measuring unit comprises two inlet wire measuring terminals, an inlet wire switch QS1 with a normally-open auxiliary contact -SD, a resistor R1, a resistor R2, a voltmeter V1 and a voltmeter V2. The relay set unit comprises a relay power supply module, an under-voltage relay KJU, an under-voltage relay KJV, an intermediate relay KA, a time relay KT, a signal relay KX and a sound and light alarm unit. The device only adds a monitoring loop to the relay protection test power supply panel, and then can monitor the under-voltage of the DC power supply according to a predetermined voltage threshold and measure and digitally display the voltages of an anode and a cathode relative to the ground. The device solves the problem that a domestic relay protection test power supply panel in the prior art does not measure or monitor insulation of an output DC power supply. The device can discover hidden trouble of new equipment loops in time during secondary equipment debugging and construction of renovation and expansion of a transformer station, so that the device improves the safety and reliability of equipment acceptance and operation.
Description
Technical field
The utility model relates to direct supply technical field, is specifically related to a kind of reaying protection test power supply panel direct supply monitoring arrangement.
Background technology
In power system transformer substation reconstruction and extension project, the new secondary device of installing and control loop thereof, due to not by checking and accepting, can not directly adopt the DC power supply in substation operation.Therefore, new equipment can only access transformer station's " reaying protection test power supply panel " direct supply as interim direct supply in the time of Installation and Debugging.
At present, the function that the direct supply of domestic reaying protection test power supply panel does not carry out measurement or the supervision of insulation against ground to output direct supply.When low the or ground connection of engineering new equipment generating loop insulation against ground in the time of Installation and Debugging, and while there is balance resistance ground connection in the power module that carries of some equipment, workmen cannot discover, check and accept and put into operation and bring potential safety hazard to new equipment, and will existing the straight-flow system in new equipment and the loop access substation operation of hidden danger to bring hidden danger and security risk to substation secondary device safe operation in the time of equipment acceptance.
In order to find as early as possible the DC loop hidden danger of new equipment, need to increase direct supply insulation monitoring function at reaying protection test power supply panel.
Utility model content
For above deficiency, the utility model provides a kind of reaying protection test power supply panel direct supply monitoring arrangement, has solved current domestic reaying protection test power supply panel and has not measured and monitor the problem that output direct supply insulate.
For realizing above object, the technical scheme that the utility model is taked is:
A kind of reaying protection test power supply panel direct supply monitoring arrangement, it comprises measuring unit, relay group unit, described measuring unit comprises two inlet wire measurement terminal, with service entrance switch QS1, resistance R 1, resistance R 2 and the voltage table V1, the voltage table V2 that often open auxiliary contact-SD, described relay group unit comprises relay supply module, undervoltage relay KJU, undervoltage relay KJV, auxiliary reclay KA, time relay KT, signal relay KX and acousto-optic warning unit;
Described two inlet wire measurement terminal are connected with measuring voltage anodal B+, measuring voltage negative pole B-respectively by switch QS1, and the one end after resistance R 1 and resistance R 2 series connection is connected in the anodal B+ of measuring voltage, and the other end is connected in the measuring voltage negative pole B-of switch QS1; One end after voltage table V1 and voltage table V2 series connection is connected in the anodal B+ of measuring voltage, and the other end is connected in measuring voltage negative pole B-, often opens auxiliary contact-SD and is connected on relay supply module;
Relay supply module is respectively undervoltage relay KJU, undervoltage relay KJV power supply, the input end B1 of undervoltage relay KJU is connected to the anodal B+ of measuring voltage, the input end C2 of undervoltage relay KJV is connected to measuring voltage negative pole B-, the input end C1 of KJU and the input end B2 of undervoltage relay KJV are all connected between resistance R 1 and resistance R 2, one end of first normally closed auxiliary contact-KA1 that auxiliary reclay KA is corresponding is connected between resistance R 1 and resistance R 2, the other end is connected between reometer V1 and reometer V2, between described reometer V1 and reometer V2 and ground connection, first two output terminals often opening two ends after the series connection of auxiliary contact-KX1 and be connected to relay supply module that signal relay KX is corresponding with it,
Described acousto-optic warning unit comprises the first acousto-optic warning unit, the second acousto-optic warning unit, and described the first acousto-optic warning unit and first of undervoltage relay KJU often open two ends after output contact-KJU1 connects and be connected to two output terminals of relay supply module; Described the second acousto-optic warning unit and first of undervoltage relay KJV often open two ends after output contact-KJV1 connects and are connected to two output terminals of relay supply module;
Two ends after described auxiliary reclay KA the 3rd normally closed auxiliary contact of often opening auxiliary contact-KA3 and time relay KT-KT series connection corresponding with it are connected to two output terminals of relay supply module, the 4th two output terminals often opening two ends after auxiliary contact-KA4 connects and be connected to relay supply module that described time relay KT is corresponding with auxiliary reclay KA.
Described relay supply module comprises switch QS2, switch power module PWM, the input end of described switch power module PWM is connected with civil power by switch QS2, often open auxiliary contact-SD and be electrically connected between switch power module PWM and switch QS2, two output terminals of relay supply module be respectively the output terminals A of switch power module PWM+and output terminals A-.
Described relay group unit further comprises an interlock reset button SR1 and normally closed reset button SR2, described interlock reset button SR1 comprises the first normally closed contact and the second normally closed contact, wherein, one end of the first normally closed contact and output terminals A-be connected, the other end is connected with undervoltage relay KJU, undervoltage relay KJV respectively, described the second normally closed contact with signal relay KX, often open auxiliary contact-KX1 and connect, the two ends of described normally closed reset button SR2 are connected to respectively the 3rd two ends of often opening auxiliary contact-KA3.
Described acousto-optic warning unit further comprises one the 3rd acousto-optic warning unit, and described the 3rd acousto-optic warning unit is in parallel with signal relay KX.
Described the first acousto-optic warning unit comprises voice guard HA1 and the warning lamp L1 of series connection, and the second acousto-optic warning unit comprises voice guard HA2 and the warning lamp L2 of series connection, and the 3rd acousto-optic warning unit comprises voice guard HA3 and the warning lamp L3 of series connection.
Described output terminals A+and output terminals A-between connect a pilot lamp L4.
The earthing of casing of described switch power module PWM.
Described relay group unit further comprises DC insulation monitoring relay KJX, relay supply module is DC insulation monitoring relay KJX power supply, an input end L+ of this DC insulation monitoring relay KJX is by corresponding second often the opening auxiliary contact-KA2 and be connected in the anodal B+ of measuring voltage of auxiliary reclay KA, another input end L-is connected in measuring voltage negative pole B-, the earth terminal KE ground connection of DC insulation monitoring relay KJX.
Described reaying protection test power supply panel direct supply monitoring arrangement further comprises a signal output unit; described signal output unit comprises 6 lead-out terminals; wherein between the first lead-out terminal and the second lead-out terminal, connect second of undervoltage relay KJU and often open auxiliary contact-KJU2; between the 3rd lead-out terminal and the 4th lead-out terminal, connect second of undervoltage relay KJV and often open auxiliary contact-KJV2, between the 5th lead-out terminal and the 6th lead-out terminal, connect second of signal relay KX and often open auxiliary contact-KX2.
Compared with prior art, its beneficial effect is the utility model: the utility model only increases a set of monitoring circuit at reaying protection test power supply panel, can monitor direct supply under-voltage by setting voltage threshold value, measures and the digital both positive and negative polarity voltage over the ground that shows.The design utilizes the insulation detection means of two kinds of principles to carry out insulation monitoring.Balance bridge electric-resistivity method: in the time there is direct-current power supply earthing, the polarity of energy automatic discrimination earth fault.Pulse leakage stream method: can be by setting insulation resistance threshold value, carry out manually the insulation against ground of positive and negative electrode being declined simultaneously in short-term or device power supply (DPS) module exists the situation of balance stake resistance to monitor.Solve current domestic reaying protection test power supply panel and do not measured and monitored the problem of output direct supply insulation; in the time of transformer station's reorganization and expansion secondary device debugging construction, can find in time new equipment loop hidden danger, thereby improve the safe reliability that equipment acceptance puts into operation.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of a kind of reaying protection test power supply panel of the utility model direct supply monitoring arrangement.
Embodiment
Below in conjunction with the drawings and specific embodiments, content of the present utility model is described in further details.
Embodiment
Please refer to shown in Fig. 1, a kind of reaying protection test power supply panel direct supply monitoring arrangement, it comprises measuring unit, relay group unit, and measuring unit comprises two inlet wire measurement terminal, with service entrance switch QS1, resistance R 1, resistance R 2 and the voltage table V1, the voltage table V2 that often open auxiliary contact-SD; Relay group unit comprises relay supply module, undervoltage relay KJU, undervoltage relay KJV, auxiliary reclay KA, time relay KT, signal relay KX and acousto-optic warning unit.
Two inlet wire measurement terminal are connected with measuring voltage anodal B+, measuring voltage negative pole B-respectively by switch QS1, and the one end after resistance R 1 and resistance R 2 series connection is connected in the anodal B+ of measuring voltage, and the other end is connected in the measuring voltage negative pole B-of switch QS1; One end after voltage table V1 and voltage table V2 series connection is connected in the anodal B+ of measuring voltage, and the other end is connected in measuring voltage negative pole B-, often opens auxiliary contact-SD and is connected on relay supply module.
Relay supply module is respectively undervoltage relay KJU, undervoltage relay KJV power supply, the input end B1 of undervoltage relay KJU is connected to the anodal B+ of measuring voltage, the input end C2 of undervoltage relay KJV is connected to measuring voltage negative pole B-, the input end C1 of KJU and the input end B1 of undervoltage relay KJV are all connected between resistance R 1 and resistance R 2, one end of normally closed auxiliary contact-KA1 that auxiliary reclay KA is corresponding is connected between resistance R 1 and resistance R 2, the other end is connected between reometer V1 and reometer V2, between reometer V1 and reometer V2 and ground connection, two ends after auxiliary contact-KX1 series connection that what signal relay KX was corresponding with it often open are connected to two output terminals of relay supply module.
Acousto-optic warning unit comprises the first acousto-optic warning unit, the second acousto-optic warning unit, and the two ends after often the opening output contact-KJU1 and connect of the first acousto-optic warning unit and undervoltage relay KJU are connected to two output terminals of relay supply module; Two ends after often the opening output contact-KJV1 and connect of the second acousto-optic warning unit and undervoltage relay KJV are connected to two output terminals of relay supply module.
Two ends after normally closed auxiliary contact-KT series connection of what auxiliary reclay KA was corresponding with it often open auxiliary contact-KA3 and time relay KT are connected to two output terminals of relay supply module, and the two ends that what time relay KT was corresponding with auxiliary reclay KA often open after auxiliary contact-KA4 connects are connected to two output terminals of relay supply module.
Relay supply module comprises switch QS2, switch power module PWM, the input end of switch power module PWM is connected with civil power by switch QS2, often opening auxiliary contact-SD is electrically connected between switch power module PWM and switch QS2, two output terminals of relay supply module be respectively the output terminals A of switch power module PWM+and output terminals A-, output terminals A+and output terminals A-between connect a pilot lamp L4, the earthing of casing of switch power module PWM.
Relay group unit further comprises an interlock reset button SR1 and normally closed reset button SR2, interlock reset button SR1 comprises the normally closed contact of 2 interlocks, one end of one of them normally closed contact and output terminals A-be connected, the other end is connected with undervoltage relay KJU, undervoltage relay KJV respectively, another normally closed contact with signal relay KX, often open auxiliary contact-KX1 and connect, the two ends of normally closed reset button SR2 are connected to respectively the two ends of often opening auxiliary contact-KA3.
Acousto-optic warning unit also comprises the 3rd acousto-optic warning unit, and the 3rd acousto-optic warning unit is in parallel with signal relay KX.Wherein, the first acousto-optic warning unit comprises voice guard HA1 and the warning lamp L1 of series connection, and the second acousto-optic warning unit comprises voice guard HA2 and the warning lamp L2 of series connection, and the 3rd acousto-optic warning unit comprises voice guard HA3 and the warning lamp L3 of series connection.
Relay group unit also comprises DC insulation monitoring relay KJX, relay supply module is DC insulation monitoring relay KJX power supply, an input end L+ of this DC insulation monitoring relay KJX is connected in the anodal B+ of measuring voltage by the auxiliary contact-KA2 that often opens corresponding to auxiliary reclay KA, another input end L-is connected in measuring voltage negative pole B-, the earth terminal KE ground connection of DC insulation monitoring relay KJX.
Reaying protection test power supply panel direct supply monitoring arrangement further comprises a signal output unit; signal output unit comprises 6 input terminals; wherein between the first lead-out terminal and the second lead-out terminal, connect second of undervoltage relay KJU and often open auxiliary contact-KJU2; between the 3rd lead-out terminal and the 4th lead-out terminal, connect second of undervoltage relay KJV and often open auxiliary contact-KJV2, between the 5th lead-out terminal and the 6th lead-out terminal, connect second of signal relay KX and often open auxiliary contact-KX2.
Its principle of work is:
1, measuring unit
Taking 110V DC power system as example, switch QS1 is the switch of measuring inlet wire, its band is often opened auxiliary contact SD, the input end of switch QS1 is connected with two inlet wire measurement terminal, the output terminal of switch QS1 is connected with measuring voltage negative pole B-with the anodal B+ of measuring voltage, in the time of two inlet wire measurement terminal access measuring voltages, could work in relay group unit.At measuring voltage positive and negative electrode respectively through resistance R 1, R2 ground connection, as balance resistance bridge.Between measuring voltage positive and negative electrode and ground, access respectively voltage table V1, V2 as voltage measurement and demonstration.
2, relay group unit
In order to isolate with measuring voltage, relay group unit is by power frequency 220V(civil power) turn the switch power module PWM power supply of direct current 24V.L4 is 24V operating voltage pilot lamp.
Undervoltage relay KJU monitors anodal voltage-to-ground, and undervoltage relay KJV monitors ground anticathode voltage, can set action threshold value.By balance resistance bridge method, in the time that anodal (negative pole) insulation against ground resistance is low, just (bearing) utmost point voltage-to-ground declines, in the time dropping to setting value, undervoltage relay KJU(KJV) action, and start audible-visual annunciator HA1/L1(HA2/L2 by output contact), HA1/L1(HA2/L2) audible-visual annunciator instruction plus earth (minus earth).Undervoltage relay KJU, undervoltage relay KJV respectively often open output contact-KJU1 ,-KJV1 of correspondence are self-retaining contact, need manually to carry out ann reset by interlock reset button SR1 after fault disappears.
DC insulation monitoring relay KJX is pulsed insulation resistance supervisory relay, because its pulse signal injecting to straight-flow system can affect the operation of equipment and the measurement of voltage, can only drop in short-term DC insulation monitoring relay KJX by manually actuated method, in the time that dropping into, DC insulation monitoring relay KJX disconnects the earth point of balance resistance bridge, in order to avoid affect the supervision effect of DC insulation monitoring relay KJX relay simultaneously.By manually starting auxiliary reclay KA by normally closed reset button SR2, after auxiliary reclay KA starts, by self contact self-sustaining, and start DC insulation monitoring relay KJX, disconnect balance resistance bridge joint place, start-up time relay K T.Drop to and set when threshold value when DC insulation monitoring relay KJX monitors system insulation against ground resistance, DC insulation monitoring relay KJX often open auxiliary contact-KJX signal and signal relay KX carries out signal maintenance, and start the low warning of insulating of audible-visual annunciator HA3/L3 indication mechanism.By manually carrying out ann reset by interlock reset button SR1.The making time of DC insulation monitoring relay KJX can be set by time relay KT, when making time reaches after time relay KT setting-up time, the time relay KT actuating of relay, auxiliary reclay KA resets, DC insulation monitoring relay KJX quits work, and the resistance bridge earth point that restores balance.
3, signal output
Often opening auxiliary contact-KJU2, often opening auxiliary contact-KJV2, often open auxiliary contact-KX2 is self-hold contact, corresponding plus earth, minus earth and the low warning of insulation respectively, can, by 6 of a signal output unit lead-out terminal lead-in wire access substation central signal system, monitor for operator.
Above-listed detailed description is for the illustrating of the utility model possible embodiments, and this embodiment is not in order to limit the scope of the claims of the present utility model, does not allly depart from the equivalence that the utility model does and implements or change, and all should be contained in the scope of the claims of this case.
Claims (9)
1. a reaying protection test power supply panel direct supply monitoring arrangement, it is characterized in that, it comprises measuring unit, relay group unit, described measuring unit comprises two inlet wire measurement terminal, with service entrance switch QS1, resistance R 1, resistance R 2 and the voltage table V1, the voltage table V2 that often open auxiliary contact-SD, described relay group unit comprises relay supply module, undervoltage relay KJU, undervoltage relay KJV, auxiliary reclay KA, time relay KT, signal relay KX and acousto-optic warning unit;
Described two inlet wire measurement terminal are connected with measuring voltage anodal B+, measuring voltage negative pole B-respectively by switch QS1, and the one end after resistance R 1 and resistance R 2 series connection is connected in the anodal B+ of measuring voltage, and the other end is connected in the measuring voltage negative pole B-of switch QS1; One end after voltage table V1 and voltage table V2 series connection is connected in the anodal B+ of measuring voltage, and the other end is connected in measuring voltage negative pole B-, often opens auxiliary contact-SD and is connected on relay supply module;
Relay supply module is respectively undervoltage relay KJU, undervoltage relay KJV power supply, the input end B1 of undervoltage relay KJU is connected to the anodal B+ of measuring voltage, the input end C2 of undervoltage relay KJV is connected to measuring voltage negative pole B-, the input end C1 of KJU and the input end B2 of undervoltage relay KJV are all connected between resistance R 1 and resistance R 2, one end of first normally closed auxiliary contact-KA1 that auxiliary reclay KA is corresponding is connected between resistance R 1 and resistance R 2, the other end is connected between reometer V1 and reometer V2, between described reometer V1 and reometer V2 and ground connection, first two output terminals often opening two ends after the series connection of auxiliary contact-KX1 and be connected to relay supply module that signal relay KX is corresponding with it,
Described acousto-optic warning unit comprises the first acousto-optic warning unit, the second acousto-optic warning unit, and described the first acousto-optic warning unit and first of undervoltage relay KJU often open two ends after output contact-KJU1 connects and be connected to two output terminals of relay supply module; Described the second acousto-optic warning unit and first of undervoltage relay KJV often open two ends after output contact-KJV1 connects and are connected to two output terminals of relay supply module;
Two ends after described auxiliary reclay KA the 3rd normally closed auxiliary contact of often opening auxiliary contact-KA3 and time relay KT-KT series connection corresponding with it are connected to two output terminals of relay supply module, the 4th two output terminals often opening two ends after auxiliary contact-KA4 connects and be connected to relay supply module that described time relay KT is corresponding with auxiliary reclay KA.
2. reaying protection test power supply panel direct supply monitoring arrangement according to claim 1; it is characterized in that; described relay supply module comprises switch QS2, switch power module PWM; the input end of described switch power module PWM is connected with civil power by switch QS2; often open auxiliary contact-SD and be electrically connected between switch power module PWM and switch QS2, two output terminals of relay supply module be respectively the output terminals A of switch power module PWM+and output terminals A-.
3. reaying protection test power supply panel direct supply monitoring arrangement according to claim 2, it is characterized in that, described relay group unit further comprises an interlock reset button SR1 and normally closed reset button SR2, described interlock reset button SR1 comprises the first normally closed contact and the second normally closed contact, wherein, one end of the first normally closed contact and output terminals A-be connected, the other end respectively with undervoltage relay KJU, undervoltage relay KJV is connected, described the second normally closed contact and signal relay KX, often open auxiliary contact-KX1 series connection, the two ends of described normally closed reset button SR2 are connected to respectively the 3rd two ends of often opening auxiliary contact-KA3.
4. reaying protection test power supply panel direct supply monitoring arrangement according to claim 3, is characterized in that, described acousto-optic warning unit further comprises one the 3rd acousto-optic warning unit, and described the 3rd acousto-optic warning unit is in parallel with signal relay KX.
5. reaying protection test power supply panel direct supply monitoring arrangement according to claim 4; it is characterized in that; described the first acousto-optic warning unit comprises voice guard HA1 and the warning lamp L1 of series connection; the second acousto-optic warning unit comprises voice guard HA2 and the warning lamp L2 of series connection, and the 3rd acousto-optic warning unit comprises voice guard HA3 and the warning lamp L3 of series connection.
6. reaying protection test power supply panel direct supply monitoring arrangement according to claim 2, is characterized in that, described output terminals A+and output terminals A-between connect a pilot lamp L4.
7. reaying protection test power supply panel direct supply monitoring arrangement according to claim 2, is characterized in that the earthing of casing of described switch power module PWM.
8. according to the reaying protection test power supply panel direct supply monitoring arrangement described in claim 1-7 any one; it is characterized in that; described relay group unit further comprises DC insulation monitoring relay KJX; relay supply module is DC insulation monitoring relay KJX power supply; an input end L+ of this DC insulation monitoring relay KJX is by corresponding second often the opening auxiliary contact-KA2 and be connected in the anodal B+ of measuring voltage of auxiliary reclay KA; another input end L-is connected in measuring voltage negative pole B-, the earth terminal KE ground connection of this DC insulation monitoring relay KJX.
9. according to the reaying protection test power supply panel direct supply monitoring arrangement described in claim 1-7 any one, it is characterized in that, described reaying protection test power supply panel direct supply monitoring arrangement further comprises a signal output unit, described signal output unit comprises 6 lead-out terminals, wherein between the first lead-out terminal and the second lead-out terminal, connect second of undervoltage relay KJU and often open auxiliary contact-KJU2, between the 3rd lead-out terminal and the 4th lead-out terminal, connect second of undervoltage relay KJV and often open auxiliary contact-KJV2, between the 5th lead-out terminal and the 6th lead-out terminal, connect second of signal relay KX and often open auxiliary contact-KX2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420067966.2U CN203811729U (en) | 2014-02-17 | 2014-02-17 | Device for monitoring DC power supply of relay protection test power supply panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420067966.2U CN203811729U (en) | 2014-02-17 | 2014-02-17 | Device for monitoring DC power supply of relay protection test power supply panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203811729U true CN203811729U (en) | 2014-09-03 |
Family
ID=51450462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420067966.2U Expired - Fee Related CN203811729U (en) | 2014-02-17 | 2014-02-17 | Device for monitoring DC power supply of relay protection test power supply panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203811729U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707083A (en) * | 2016-12-28 | 2017-05-24 | 国家电网公司 | Substation direct current grounding detecting device |
| CN106940390A (en) * | 2017-02-14 | 2017-07-11 | 国网新疆电力公司伊犁供电公司 | Straight-flow system Insulation monitoring switching device |
| CN110488146A (en) * | 2019-04-02 | 2019-11-22 | 许继电气股份有限公司 | A kind of DC distribution net type insulation monitoring system and D.C. isolation monitoring device |
| CN111983322A (en) * | 2020-08-24 | 2020-11-24 | 天津铁路信号有限责任公司 | Subway power screen output circuit insulation resistance monitoring circuit with switching function |
| CN112557964A (en) * | 2020-12-02 | 2021-03-26 | 中国南方电网有限责任公司超高压输电公司梧州局 | Portable 2M line detection device |
-
2014
- 2014-02-17 CN CN201420067966.2U patent/CN203811729U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707083A (en) * | 2016-12-28 | 2017-05-24 | 国家电网公司 | Substation direct current grounding detecting device |
| CN106940390A (en) * | 2017-02-14 | 2017-07-11 | 国网新疆电力公司伊犁供电公司 | Straight-flow system Insulation monitoring switching device |
| CN106940390B (en) * | 2017-02-14 | 2023-08-08 | 国网新疆电力公司伊犁供电公司 | Insulation detection switching device of direct current system |
| CN110488146A (en) * | 2019-04-02 | 2019-11-22 | 许继电气股份有限公司 | A kind of DC distribution net type insulation monitoring system and D.C. isolation monitoring device |
| CN111983322A (en) * | 2020-08-24 | 2020-11-24 | 天津铁路信号有限责任公司 | Subway power screen output circuit insulation resistance monitoring circuit with switching function |
| CN111983322B (en) * | 2020-08-24 | 2023-07-04 | 天津铁路信号有限责任公司 | Metro power supply screen output loop insulation resistance monitoring circuit with switching function |
| CN112557964A (en) * | 2020-12-02 | 2021-03-26 | 中国南方电网有限责任公司超高压输电公司梧州局 | Portable 2M line detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203811729U (en) | Device for monitoring DC power supply of relay protection test power supply panel | |
| KR102145266B1 (en) | System and method for monitoring power system | |
| CN203553628U (en) | Intelligent power box for base station | |
| CN104638768A (en) | Intelligent power distribution security control terminal based on residential electricity consumption | |
| CN107086537B (en) | Cut-off device and cut-off method for preventing the electrification of primary equipment in relay protection debugging of substation | |
| CN208043923U (en) | A kind of insulation leakagel volume leakage automatic detection device of distribution box | |
| CN102798782A (en) | High-voltage insulation resistance monitoring alarm | |
| CN105823954B (en) | Detection device and method for grounding point of storage battery pack and direct-current power supply system | |
| CN103762557B (en) | The anti-open-circuit-protection method of current transformer | |
| WO2018177336A1 (en) | Photovoltaic direct current grounding device | |
| CN205666686U (en) | Distribution equipment remote management system | |
| CN203444008U (en) | High-voltage charge display locking device | |
| WO2019174075A1 (en) | Direct current high-voltage live display locking device | |
| CN205910558U (en) | Thing networking ammeter case | |
| CN203825089U (en) | Remote monitoring device of transformer insulating resistance | |
| CN203204415U (en) | Novel remote alarming control system for high voltage converter | |
| CN215498243U (en) | Leakage protection system of block terminal | |
| CN202190057U (en) | generator grounding protection device | |
| CN106546825B (en) | Intelligent wireless transmission micro-opening self-zero-drift correction microcomputer insulation comprehensive detection system | |
| CN204168220U (en) | A kind of earthing device of photovoltaic module and protection system | |
| CN109066551A (en) | A kind of power transmission circuit caused by windage warning device | |
| CN104701821B (en) | A kind of SF6Breaker monitors system | |
| CN105518953B (en) | For monitoring the electrical equipment and its operating method of battery condition | |
| CN207181580U (en) | Broken neutral line indicator | |
| CN207518256U (en) | Triple negative ground voltage protections |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20150217 |
|
| EXPY | Termination of patent right or utility model |