CN104880626A - Method for automatically detecting action characters of residual current protective device - Google Patents
Method for automatically detecting action characters of residual current protective device Download PDFInfo
- Publication number
- CN104880626A CN104880626A CN201510240829.3A CN201510240829A CN104880626A CN 104880626 A CN104880626 A CN 104880626A CN 201510240829 A CN201510240829 A CN 201510240829A CN 104880626 A CN104880626 A CN 104880626A
- Authority
- CN
- China
- Prior art keywords
- data
- detection
- acting characteristic
- rcd
- current value
- 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.)
- Granted
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a method for automatically detecting action characters of a residual current protective device. The method comprises the following steps: firstly, preparing for detecting the action characters of the residual current protective device; secondly, adjusting a grounded resistor for detection; thirdly, detecting and collecting detection data of the action characters of the residual current protective device; and finally, comparing and judging data of the action characters of the residual current protective device before the detection, in the detection, and after the detection. According to the method, the accuracy of detecting the action characters of the residual current protective device is improved.
Description
Technical field
The present invention relates to power technology, particularly relate to RCD acting characteristic detection method.
Background technology
Rural low voltage network classification installing RCD is one of minimizing or the effective measures preventing personal electric shock casualty accident, is also the technical measures preventing from causing electrical fire and electrical equipment to damage by electric leakage.For many years; RCD is applied throughout all parts of the country; from family, enterprise and power supply enterprise all in use, the intelligent RCD that particularly power supply enterprise is installed in recent years, for power supply enterprise alleviates more pressure in operation maintenance work.
The acting characteristic detection of rural power grids RCD is the major tasks of power supply enterprise's controller switching equipment operation maintenance; this device action sensitivity directly prevents the most effective defense technique measure of personal electric shock casualty accident; detected site work by hand in the past, and not only increased power supply station's workload but also there is job safety risk.
Summary of the invention
Technical matters to be solved by this invention is just to provide a kind of RCD acting characteristic automatic testing method; utilize clocked flip automatically to complete RCD acting characteristic to detect; can significantly promote power supply enterprise's work efficiency; reduce job safety risk, improve the degree of accuracy of device action Characteristics Detection.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of RCD acting characteristic automatic testing method, comprises the steps:
First, carry out RCD acting characteristic and detect preparation, be specially this month tripping operation record that statistics RCD stores, if store tripping operation record, send the information of " this month has trip operation record " and terminate this RCD acting characteristic detection preparation, if do not trip record, then enter next step;
Secondly, regulated ground resistance detects, be specially " residual action current value " data reading and preset in RCD, according to the scope of " residual action current value " data, the corresponding stake resistance of automatic adjustment, and testing circuit correspondence is connected to A phase or B phase or C phase;
Then, detect and collect RCD acting characteristic detection data, specifically comprise data and the rear data of detection in data before detecting, detection, RCD acting characteristic wherein detects data and comprises U
a, U
b, U
c, I
a, I
b, I
c, residual current I
Δ nwith the data of switching value KGL;
Finally, data after data in data, detection before the detection of RCD acting characteristic and detection are carried out contrasting and judged, if meet U
a1>0, U
a2=0, U
a3>0, U
b1>0, U
b2=0, U
b3>0, U
c1>0, U
c2=0, U
c3>0, I
a1>0, I
a2=0, I
a3>0, I
b1>0, I
b2=0, I
b3>0, I
c1>0, I
c2=0, I
c3>0, I
Δ n1>0, I
Δ n2=0, I
Δ n3>0, KGL
1=1, KGL
2=0 and KGL
3=1 condition; then send " RCD acting characteristic detects normal " information; and terminate this acting characteristic detection preparation; if do not met; send " RCD acting characteristic detects abnormal; need on-site verification " information, and terminate this acting characteristic detection preparation.
Preferably, " residual action current value " data of reading are 50 ~ 75mA, and automatic regulated ground resistance is 1k Ω shelves, and testing circuit is connected to A phase; Residual action current value " data are when being 100 ~ 150mA, automatic regulated ground resistance is 1.5k Ω shelves, and testing circuit is connected to B phase; Residual action current value " data are when being 200 ~ 300mA, automatic regulated ground resistance is 2k Ω shelves, and testing circuit is connected to C phase.
Preferably, if when " residual action current value " data are greater than 300mA, first the residual action current value of RCD is adjusted to 300mA, and then corresponding stake resistance is regulated to detect.
Preferably; when in detecting RCD acting characteristic, data carry out detection collection; according to deliberate action Characteristics Detection timing; by testing circuit phase sequence by relay coil 0.2s conduction time to carry out simulating 80% detection of residual current super default " residual action current value " through connecing resistance to grounding body; send Data Collection instruction after waiting for 10 ~ 20s, gather related data.
Preferably, according to the data of collecting, U is judged
a2=0, U
b2=0, U
c2=0 and KGL
2whether the condition of=0 meets, and does not meet, and increase relay coil ON time returns and again detects, and meets, and carries out detection and collection that RCD acting characteristic detects rear data.
Preferably; after in detecting RCD acting characteristic, data carry out repeatedly cycle detection collection; if still do not met; finally by testing circuit phase sequence by relay coil 0.5s conduction time to carry out simulating 80% detection of residual current super default " residual action current value " through connecing resistance to grounding body; then collect data and judge, judging U
a2=0, U
b2=0, U
c2=0 and KGL
2whether=0 condition meets; do not meet transmission " RCD acting characteristic detects abnormal; need on-site verification " note, and terminate this acting characteristic detection preparation, meet, after carrying out the detection of RCD acting characteristic, Data Detection is collected.
Application of the present invention has accomplished that automatically completing RCD acting characteristic detects; also utilize the low power consumption period to detect simultaneously; achieve many power supplies; avoid client's complaint of transient-power failure; also improve the accuracy that RCD acting characteristic detects, play the effect conscientiously alleviating grass-roots work amount.
(1) operation maintenance quality is improved.Utilize the public power load characteristic customization RCD acting characteristic detection time of becoming; of that month frequent movement can be avoided to affect the normal productive life electricity consumption of client; and achieve the detection being monthly regularly timed to rule, solve in the past random client that operation brings and be discontented with.
(2) RCD operational reliability is improved.The function such as utilize the statistics of test unit, contrast and study and judge; further increase the circuit board before and after RCD action, the healthy rate of mechanism action judges; testing result than manually puts in place more; namely solve and estimated not detectable internal fault in the past, also ensured RCD bringing normally into operation.
(3) grass-roots work pressure is reduced.Test unit monthly clocked flip detects, and achieves equipment manager and utilizes SMS to consult understanding testing result, alleviate the working pressure of basic unit, also achieve remote supervisory RCD running status.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is remote auto landing operation test unit theory diagram of the present invention;
Fig. 2 is remote auto landing operation test unit earthing module wiring diagram of the present invention;
Fig. 3 is remote auto landing operation test unit wiring diagram of the present invention;
Fig. 4 is the automatic overhaul flow chart of RCD acting characteristic.
Embodiment
As shown in Figure 1 to Figure 3, test unit comprises liquid crystal display, data memory module, CPU processor, gsm module, input through keyboard module, power module, data acquisition module, earthing module and two groups of change-over switches and on-the-spot trial jump button key composition, and concrete function is as follows:
(1) data-carrier store.Data after the complete acting characteristic Detection task of primary responsibility test unit store.
(2) CPU processor.Perform and gather RCD service data instruction transmission; grounding resistance regulates automatically; the relay coil time that logical (breaking) is connected with stake resistance regulates automatically; the setting of timed activity Characteristics Detection threshold values; GSM message triggers, and acting characteristic detects the function such as Data Comparison and judgement.
(3) power module.Working power access and lithium battery automatic charging, when this module is met and had a power failure, test unit can also pass through lithium battery power supply.
(4) data acquisition module.Detect plant-grid connection by 485 ports and two-way acting characteristic to form, 485 ports are responsible for carrying out exchanges data with RCD, gather voltage, electric current, residual current, switching value and tripping operation record data that RCD pushes.Two-way acting characteristic detects power supply then from the access of low-pressure line-outgoing fuse upper prop lead-in wire.
(5) earthing module.Detect plant-grid connection according to two-way acting characteristic to be connected with grounding body with 1k Ω ~ 2k Ω resistance through relay normally open contact.
(6) input through keyboard module.Data query in test unit data-carrier store, acting characteristic detects timing threshold value setting, and GSM mobile handset number sets, RCD type set etc.
(7) liquid crystal display.Trial jump testing process data wheel shows and data display in data-carrier store.
(8) change-over switch.The switching of test unit automatic and manual operation acting characteristic detecting pattern can be carried out according to long-range/on-the-spot switch.
(9) on-the-spot trial jump.When being on-the-spot by long-range/on-the-spot switch-linear hybrid, pressing on-the-spot trial jump button and carry out trial jump detection.
(10) gsm module.Be responsible for SMS to send, long-range reception parameters adjustment and editing short message carry out data query.
In conjunction with the automatic overhaul flow chart of RCD acting characteristic as shown in Figure 4, the concrete steps of RCD acting characteristic automatic testing method are explained.
First, carry out RCD acting characteristic and detect preparation, be specially this month tripping operation record that statistics RCD stores, if store tripping operation record, send the information of " this month has trip operation record " and terminate this RCD acting characteristic detection preparation, if do not trip record, then enter next step;
Secondly, regulated ground resistance detects, be specially " residual action current value " data reading and preset in RCD, according to the scope of " residual action current value " data, the corresponding stake resistance of automatic adjustment, and testing circuit correspondence is connected to A phase or B phase or C phase;
Then, detect and collect RCD acting characteristic detection data, specifically comprise data and the rear data of detection in data before detecting, detection, RCD acting characteristic wherein detects data and comprises U
a, U
b, U
c, I
a, I
b, I
c, residual current I
Δ nwith the data of switching value KGL;
Finally, data after data in data, detection before the detection of RCD acting characteristic and detection are carried out contrasting and judged, if meet U
a1>0, U
a2=0, U
a3>0, U
b1>0, U
b2=0, U
b3>0, U
c1>0, U
c2=0, U
c3>0, I
a1>0, I
a2=0, I
a3>0, I
b1>0, I
b2=0, I
b3>0, I
c1>0, I
c2=0, I
c3>0, I
Δ n1>0, I
Δ n2=0, I
Δ n3>0, KGL
1=1, KGL
2=0 and KGL
3=1 condition; then send " RCD acting characteristic detects normal " information; and terminate this acting characteristic detection preparation; if do not met; send " RCD acting characteristic detects abnormal; need on-site verification " information, and terminate this acting characteristic detection preparation.
Further, be specially:
Step 1: according to the timing arranged in CPU processor, starts RCD acting characteristic and detects preparation, eliminates CPU processor cache data, enters RCD acting characteristic testing process.
Step 2:CPU processor utilizes this month tripping operation record in 485 port communication statistics RCD storeies; detect preparation day forward according to acting characteristic to add up for 29th; when result is for being more than or equal to " 1 ", enter step 3, otherwise enter step 4.
Step 3: trigger gsm module send " this month has trip operation record " note, and enter step 17 link terminate this RCD acting characteristic detect prepare.
Step 4: read " residual action current value " data preset in RCD by 485 ports.
Step 5: reading " residual action current value " data is 50 ~ 75mA, and the automatic regulated ground resistance of test unit is 1k Ω shelves, and testing circuit is connected to A phase; During 100 ~ 150mA, regulated ground resistance is 1.5k Ω shelves, and testing circuit is connected to B phase; During 200 ~ 300mA, be adjusted to 2k Ω shelves, testing circuit is connected to C phase.If when being greater than 300mA, first test unit sends instruction, and the residual action current value of RCD is adjusted to 300mA, and then regulates on corresponding stake resistance and detect.
Step 6: send RCD acting characteristic and detect front Data Collection instruction, gather U
a, U
b, U
c, I
a, I
b, I
c, residual current I
Δ nbe stored in CPU processor cache with the data of switching value KGL, and press U
a1, U
b1, U
c1, I
a1, I
b1, I
c1, I
Δ n1and KGL
1form stores.
Step 7: according to CPU processor deliberate action Characteristics Detection timing, by testing circuit phase sequence by relay coil 0.2s conduction time to carry out simulating 80% detection of residual current super default " residual action current value " through connecing resistance to grounding body.
Step 8: send Data Collection instruction after waiting for 10 ~ 20s, gathers U
a, U
b, U
c, I
a, I
b, I
c, residual current I
Δ nbe stored in CPU processor cache with the data of switching value KGL, and press U
a2, U
b2, U
c2, I
a2, I
b2, I
c2, I
Δ n2and KGL
2form stores, 0.3s and 0.5s circle collection then adopts the data in alternative CPU processor cache.
Step 9: judge U
a2=0, U
b2=0, U
c2=0 and KGL
2whether=0 condition meets, and does not meet and returns step 10 or step 11 successively by 0.3s and 0.5s ON time, meet, enter step 12.
Step 10: by testing circuit phase sequence by relay coil 0.3s conduction time to carry out simulating 80% detection of residual current super default " residual action current value " through connecing resistance to grounding body, and then enter step 8 and step 9 Data Collection and judgement and sentence link, do not meet and enter step 11, eligiblely enter step 12.
Step 11: by testing circuit phase sequence by relay coil 0.5s conduction time to carry out simulating 80% detection of residual current super default " residual action current value " through connecing resistance to grounding body, then sentence according to step 8 and step 9 Data Collection and judgement and also do not meet, ineligiblely carry out step 16, meet, enter step 12.
Again send Data Collection instruction after step 12:60s, gather U
a, U
b, U
c, I
a, I
b, I
c, residual current I
Δ n2be stored in CPU processor cache with the data of switching value KGL, and press U
a3, U
b3, U
c3, I
a3, I
b3, I
c3, I
Δ n3and KGL
3form stores.
Step 13: carry out contrasting according to (data of the collection after 60s) after (10 ~ 20s image data) before detection in CPU processor cache, in detection and detection and judge.
Step 14: if meet U
a1>0, U
a2=0, U
a3>0, U
b1>0, U
b2=0, U
b3>0, U
c1>0, U
c2=0, U
c3>0, I
a1>0, I
a2=0, I
a3>0, I
b1>0, I
b2=0, I
b3>0, I
c1>0, I
c2=0, I
c3>0, I
Δ n1>0, I
Δ n2=0, I
Δ n3>0, KGL
1=1, KGL
2=0 and KGL
3=1 condition then enters step 15, does not meet and enters step 16.
Step 15: trigger gsm module and send " RCD acting characteristic detect normal " note, and enter step 17 and terminate this acting characteristic and detect and prepare.
Step 16: trigger gsm module and send " RCD acting characteristic detect abnormal, need on-site verification " note, and enter step 17 and terminate this acting characteristic and detect and prepare.
Step 17: by the data conversion storage in CPU processor cache in data-carrier store, and remove data cached.
Claims (6)
1. a RCD acting characteristic automatic testing method, is characterized in that comprising the steps:
First, carry out RCD acting characteristic and detect preparation, be specially this month tripping operation record that statistics RCD stores, if store tripping operation record, send the information of " this month has trip operation record " and terminate this RCD acting characteristic detection preparation, if do not trip record, then enter next step;
Secondly, regulated ground resistance detects, be specially " residual action current value " data reading and preset in RCD, according to the scope of " residual action current value " data, the corresponding stake resistance of automatic adjustment, and testing circuit correspondence is connected to A phase or B phase or C phase;
Then, detect and collect RCD acting characteristic detection data, specifically comprise data and the rear data of detection in data before detecting, detection, RCD acting characteristic wherein detects data and comprises U
a, U
b, U
c, I
a, I
b, I
c, residual current I
Δ nwith the data of switching value KGL;
Finally, data after data in data, detection before the detection of RCD acting characteristic and detection are carried out contrasting and judged, if meet U
a1>0, U
a2=0, U
a3>0, U
b1>0, U
b2=0, U
b3>0, U
c1>0, U
c2=0, U
c3>0, I
a1>0, I
a2=0, I
a3>0, I
b1>0, I
b2=0, I
b3>0, I
c1>0, I
c2=0, I
c3>0, I
Δ n1>0, I
Δ n2=0, I
Δ n3>0, KGL
1=1, KGL
2=0 and KGL
3=1 condition; then send " RCD acting characteristic detects normal " information; and terminate this acting characteristic detection preparation; if do not met; send " RCD acting characteristic detects abnormal; need on-site verification " information, and terminate this acting characteristic detection preparation.
2. a kind of RCD acting characteristic automatic testing method according to claim 1, is characterized in that: " residual action current value " data of reading are 50 ~ 75mA, and automatic regulated ground resistance is 1k Ω shelves, and testing circuit is connected to A phase; Residual action current value " data are when being 100 ~ 150mA, automatic regulated ground resistance is 1.5k Ω shelves, and testing circuit is connected to B phase; Residual action current value " data are when being 200 ~ 300mA, automatic regulated ground resistance is 2k Ω shelves, and testing circuit is connected to C phase.
3. a kind of RCD acting characteristic automatic testing method according to claim 2; it is characterized in that: if when " residual action current value " data are greater than 300mA; first the residual action current value of RCD is adjusted to 300mA, and then regulate corresponding stake resistance to detect.
4. a kind of RCD acting characteristic automatic testing method according to claim 1; it is characterized in that: when in detecting RCD acting characteristic, data carry out detection collection; according to deliberate action Characteristics Detection timing; by testing circuit phase sequence by relay coil 0.2s conduction time to carry out simulating 80% detection of residual current super default " residual action current value " through connecing resistance to grounding body; send Data Collection instruction after waiting for 10 ~ 20s, gather related data.
5. a kind of RCD acting characteristic automatic testing method according to claim 4, is characterized in that: according to the data of collecting, judge U
a2=0, U
b2=0, U
c2=0 and KGL
2whether the condition of=0 meets, and does not meet, and increase relay coil ON time returns and again detects, and meets, and carries out detection and collection that RCD acting characteristic detects rear data.
6. a kind of RCD acting characteristic automatic testing method according to claim 5; it is characterized in that: after in detecting RCD acting characteristic, data carry out repeatedly cycle detection collection; if still do not met; finally by testing circuit phase sequence by relay coil 0.5s conduction time to carry out simulating 80% detection of residual current super default " residual action current value " through connecing resistance to grounding body; then collect data and judge, judging U
a2=0, U
b2=0, U
c2=0 and KGL
2whether=0 condition meets; do not meet transmission " RCD acting characteristic detects abnormal; need on-site verification " note, and terminate this acting characteristic detection preparation, meet, after carrying out the detection of RCD acting characteristic, Data Detection is collected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510240829.3A CN104880626B (en) | 2015-05-13 | 2015-05-13 | A kind of RCD acting characteristic automatic testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510240829.3A CN104880626B (en) | 2015-05-13 | 2015-05-13 | A kind of RCD acting characteristic automatic testing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104880626A true CN104880626A (en) | 2015-09-02 |
| CN104880626B CN104880626B (en) | 2017-11-21 |
Family
ID=53948193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510240829.3A Active CN104880626B (en) | 2015-05-13 | 2015-05-13 | A kind of RCD acting characteristic automatic testing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104880626B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627710A (en) * | 2017-03-15 | 2018-10-09 | 深圳市奇辉电气有限公司 | A kind of detection method and its system of electrical equipment acting characteristic |
| CN111880084A (en) * | 2020-08-11 | 2020-11-03 | 常熟开关制造有限公司(原常熟开关厂） | Residual current protection uninterruptible power test method and device and residual current protection device |
| CN111880083A (en) * | 2020-08-11 | 2020-11-03 | 常熟开关制造有限公司(原常熟开关厂） | Uninterrupted residual current test method and device and residual current protection device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62220875A (en) * | 1986-03-24 | 1987-09-29 | Hitachi Ltd | Method and device for diagnosis |
| JPH03279875A (en) * | 1990-03-29 | 1991-12-11 | Matsushita Electric Works Ltd | Fault detecting device |
| CN1967762A (en) * | 2006-10-13 | 2007-05-23 | Tcl低压电器(无锡)有限公司 | Electromagnetic residual current action protector and its protecting method |
| CN101221227A (en) * | 2008-01-30 | 2008-07-16 | 安泰科技股份有限公司 | Test system and method for magnetic property of after-current actuating protector magnetic core |
| CN201094134Y (en) * | 2007-05-29 | 2008-07-30 | 浙江正泰电器股份有限公司 | Residual current operation protector with self-diagnostic function |
| CN201341011Y (en) * | 2008-12-29 | 2009-11-04 | 宜昌供电公司电能计量中心 | Detection wiring device of residual current action protector |
| CN201576057U (en) * | 2009-09-21 | 2010-09-08 | 曾锡山 | Automatic calibration equipment for residual current operated protective devices |
| CN102944858A (en) * | 2012-11-12 | 2013-02-27 | 无锡市计量测试中心 | Residual current device action characteristic detector calibration instrument separating switch |
| CN104391243A (en) * | 2014-11-18 | 2015-03-04 | 国家电网公司 | Automatic testing device for three-phase aftercurrent action protector |
-
2015
- 2015-05-13 CN CN201510240829.3A patent/CN104880626B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62220875A (en) * | 1986-03-24 | 1987-09-29 | Hitachi Ltd | Method and device for diagnosis |
| JPH03279875A (en) * | 1990-03-29 | 1991-12-11 | Matsushita Electric Works Ltd | Fault detecting device |
| CN1967762A (en) * | 2006-10-13 | 2007-05-23 | Tcl低压电器(无锡)有限公司 | Electromagnetic residual current action protector and its protecting method |
| CN201094134Y (en) * | 2007-05-29 | 2008-07-30 | 浙江正泰电器股份有限公司 | Residual current operation protector with self-diagnostic function |
| CN101221227A (en) * | 2008-01-30 | 2008-07-16 | 安泰科技股份有限公司 | Test system and method for magnetic property of after-current actuating protector magnetic core |
| CN201341011Y (en) * | 2008-12-29 | 2009-11-04 | 宜昌供电公司电能计量中心 | Detection wiring device of residual current action protector |
| CN201576057U (en) * | 2009-09-21 | 2010-09-08 | 曾锡山 | Automatic calibration equipment for residual current operated protective devices |
| CN102944858A (en) * | 2012-11-12 | 2013-02-27 | 无锡市计量测试中心 | Residual current device action characteristic detector calibration instrument separating switch |
| CN104391243A (en) * | 2014-11-18 | 2015-03-04 | 国家电网公司 | Automatic testing device for three-phase aftercurrent action protector |
Non-Patent Citations (3)
| Title |
|---|
| 吴宇红 等: "农网配电设备远程故障诊断技术的研究与应用", 《中国电业（技术版）》 * |
| 李文苹: "基于单片机控制的剩余电流动作保护器动作特性检测装置的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑 》 * |
| 马道生: "基于单片机控制的剩余电流动作特性检测仪的实现方案", 《机电工程技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627710A (en) * | 2017-03-15 | 2018-10-09 | 深圳市奇辉电气有限公司 | A kind of detection method and its system of electrical equipment acting characteristic |
| CN111880084A (en) * | 2020-08-11 | 2020-11-03 | 常熟开关制造有限公司(原常熟开关厂） | Residual current protection uninterruptible power test method and device and residual current protection device |
| CN111880083A (en) * | 2020-08-11 | 2020-11-03 | 常熟开关制造有限公司(原常熟开关厂） | Uninterrupted residual current test method and device and residual current protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104880626B (en) | 2017-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104880666A (en) | Remote testing device of automatic grounding operation | |
| CN102830255B (en) | A kind of intelligent electric energy meter with electricity consumption malfunction monitoring defencive function | |
| CN102468690B (en) | Distribution-transforming centralized meter-reading monitoring terminal | |
| CN202948040U (en) | Intelligent electric energy meter having power failure monitoring and protection functions | |
| CN202886463U (en) | Intelligent electric energy meter with functions of electric leakage remote monitoring and protection | |
| CN103198577B (en) | The charging device of electric automobile of safe and intelligent and control method thereof | |
| CN202994943U (en) | Overhead line fault detector | |
| CN201985627U (en) | Power distribution terminal and intelligent power grid system using same | |
| CN105279952A (en) | Whole-event acquisition testing system of intelligent ammeter based on virtual ammeter module | |
| CN112557714A (en) | Multi-core modular intelligent electric energy meter | |
| CN104880626A (en) | Method for automatically detecting action characters of residual current protective device | |
| CN102393506B (en) | Monitoring system of tripping pulse of breaker | |
| CN203204721U (en) | Secure and intelligent electric automobile charging device | |
| CN202535162U (en) | Electronic mutual inductor-based intelligent high-voltage power distribution switch | |
| CN102624090B (en) | Based on the intelligent high-pressure panel switches of electronic mutual inductor | |
| CN204794372U (en) | Long -range charge control system of circuit breaker on post | |
| CN213337963U (en) | Fill electric pile intellectual detection system | |
| CN201918003U (en) | Wireless low-voltage meter-reading monitoring concentrator | |
| CN101615012A (en) | Remote operation intelligent and safe checking method | |
| CN206742969U (en) | A kind of intelligent terminal based on electric power property | |
| CN203689675U (en) | Remote connection control device for low-voltage customer electricity consumption information acquisition terminal | |
| CN203502453U (en) | Wireless public network communication module for three-phase intelligent electric energy meter | |
| CN201656457U (en) | Distribution line troubleshooting control system | |
| CN205230339U (en) | Test system is gathered to smart electric meter total event based on virtual electric energy meter module | |
| CN201993427U (en) | Data collection and analysis device for substation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |