CN113359020A - Automatic monitoring device for working parameters of circuit breaker - Google Patents
Automatic monitoring device for working parameters of circuit breaker Download PDFInfo
- Publication number
- CN113359020A CN113359020A CN202110678264.2A CN202110678264A CN113359020A CN 113359020 A CN113359020 A CN 113359020A CN 202110678264 A CN202110678264 A CN 202110678264A CN 113359020 A CN113359020 A CN 113359020A
- Authority
- CN
- China
- Prior art keywords
- voltage
- sensor
- regulating unit
- output
- release
- 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
- 238000012806 monitoring device Methods 0.000 title claims abstract description 12
- 230000001105 regulatory effect Effects 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims description 40
- 238000012544 monitoring process Methods 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000002457 bidirectional effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- VAYOSLLFUXYJDT-RDTXWAMCSA-N Lysergic acid diethylamide Chemical class C1=CC(C=2[C@H](N(C)C[C@@H](C=2)C(=O)N(CC)CC)C2)=C3C2=CNC3=C1 VAYOSLLFUXYJDT-RDTXWAMCSA-N 0.000 description 3
- 238000005760 Tripper reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012429 release testing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses an automatic monitoring device for working parameters of a circuit breaker, which comprises a voltage regulating unit, a to-be-detected release, a sensor and a monitor, wherein the input end of the voltage regulating unit is connected with a power grid, the output end of the voltage regulating unit is connected with the to-be-detected release, the to-be-detected release is connected with the sensor, the sensor is connected with the monitor, the voltage regulating unit is mutually connected with the monitor, the sensor is used for detecting whether a movable iron core of the release moves in place, and the monitor is used for regulating the output voltage of the voltage regulating unit and receiving signals of the sensor. According to the range of the action voltage of the detected object, the voltage regulating unit is controlled by the monitor to gradually increase or decrease the output voltage until the detected release acts, so the invention has the advantages of high detection precision, good real-time performance, low manufacturing cost and the like.
Description
Technical Field
The invention relates to the technical field of low-voltage electric appliances, in particular to an automatic monitoring device for working parameters of a circuit breaker.
Background
Low-voltage circuit breaker accessories (elements) undervoltage trippers, shunt trippers and closing electromagnets, according to GB14148.1-2008 "general rules for low-voltage switchgear and control devices" and GB 14048.2-2012 "part 2 of low-voltage switchgear and control devices: according to the stipulation of the circuit breaker, when the input voltage of the undervoltage release is more than or equal to 0.85Ue, the undervoltage release should be actuated immediately to attract so as to provide a closing condition for a main contact system of the circuit breaker, and when the input voltage of the undervoltage release is less than 0.7Ue, the undervoltage release should be actuated instantaneously or in a delayed manner to jack off a circuit breaker locking mechanism so as to realize undervoltage opening; when the input voltage of the shunt release is between 70% and 110% of the rated power grid voltage, the shunt release is released under all working conditions of the electric appliance to disconnect the electric appliance; the working voltage range of the closing electromagnet is the same as that of the shunt release.
CN101109787B discloses an intelligent detection device for undervoltage trip of circuit breaker. It includes voltage regulation, switching, trigger circuit and computer; the voltage regulating circuit consists of a voltage regulating transformer and a measuring transformer, wherein two taps of a secondary coil of the measuring transformer are in a group, and the voltage value of each group of taps is respectively 1 time and 50 percent of the rated voltage of the undervoltage release; the switching circuit consists of contactors and bidirectional thyristors, each group of taps of the measuring transformer is respectively connected with one end of a normally open or normally closed contact of a corresponding group of contactors, and the other end of the measuring transformer is connected with two bidirectional thyristors after being connected in parallel; the output end of the trigger circuit is respectively connected with the gate poles of the two bidirectional thyristors, and the computer is in contact with the input end of the optical coupler in the power generation circuit.
CN102565697B discloses an undervoltage release testing device, which includes: the programmable power supply, the force measuring device and the computer are used for measuring the maximum output voltage of the undervoltage release; the computer is connected with the programmable power supply and is used for sending out a control signal of the programmable power supply and receiving a voltage signal of the programmable power supply; the programmable power supply is connected with a coil of an undervoltage release to be tested; the detection signal output end of the force measuring device for detecting the tripping force of the under-voltage release to be detected is connected with the computer; the tripping force testing part of the force measuring device is arranged opposite to the armature of the tripper to be tested.
How to rapidly carry out action voltage parameter monitoring to three types of trippers, guarantee the monitoring precision, less manual intervention links to guarantee detection device self longer life is the problem that low voltage circuit breaker trade generally concerns.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the automatic monitoring device for the working parameters of the circuit breaker, which can detect the action voltage values of the undervoltage release, the shunt release and the closing electromagnet with high precision, good real-time performance and low manufacturing cost.
The purpose of the invention is realized by the following technical scheme.
The utility model provides a circuit breaker working parameter automatic monitoring device, includes the pressure regulating unit, is examined release, sensor and control appearance, the input and the electric wire netting of pressure regulating unit are connected, the output of pressure regulating unit with be examined the release and be connected, it is connected with the sensor to examine the release, the sensor is connected with the control appearance, pressure regulating unit and control appearance interconnect, the sensor is used for the release to move the detection that whether the iron core motion targets in place, the control appearance is used for adjusting the output voltage of pressure regulating unit, accepts the sensor signal.
The secondary of the transformer in the voltage regulating unit comprises a multi-winding transformer with voltage values coded according to 8-4-2-1 codes or a combination body which is controlled by a monitoring instrument and consists of a plurality of single-pole double-throw switch relays or a plurality of silicon controlled electronic elements, continuously variable and non-instantaneous voltage is output, and the output voltage value of the secondary coil of the transformer in the voltage regulating unit is configured according to a weight of 8-4-2-1 or 8-4-2-1 weight voltage output is configured on a basic voltage value.
The detected tripper comprises an undervoltage tripper for a circuit breaker, a shunt tripper and a closing electromagnet, the closing electromagnet comprises an instantaneous-action type or delay-action type electromagnet controlled by an electronic circuit, and the closing electromagnet is electromagnetic or permanent magnet type and moves an iron core to eject or retract after being electrified.
The sensor comprises a shielding type photoelectric sensor, a contact type sensor, a proximity switch and a sound sensor, wherein the shielding type photoelectric sensor, the contact type sensor, the proximity switch and the sound sensor are used for enabling the movable iron core of the electromagnet to move to the bottom.
The monitoring instrument is an intelligent instrument or a personal computer which outputs and outputs digital quantity and has an operation function, comprises a communication component, an A/D acquisition card and a USB interface and has an LCD graphic screen display function, controls the on-off of a secondary winding in the voltage regulating unit and establishes the relation state of the voltage value output by each winding and an on-off device.
Compared with the prior art, the invention has the advantages that: the invention provides an automatic detection device which can rapidly detect the action voltage values (the voltage detection precision is less than 0.4 percent at least) and the delay values of an undervoltage release, a shunt release and a closing electromagnet with high precision and judge whether the products are ideal products or not, not only provides convenience for removing unqualified products in the production process, but also provides quantitative parameter guidance for product design and rectification, and can be used as an online detection instrument on a production line and a quantitative detection instrument for an inspection room. The automatic detection device mainly based on the transformer with the digital structure overcomes the defects of spark generation, insufficient voltage regulation precision, repeated oscillation during voltage regulation and the like of a contact type analog voltage regulator due to long-term repeated rotating contact abrasion, overcomes the essential defect of a detection means that the tripping device has the same instantaneous voltage loss caused by instantaneous power failure in the form of adding the disordered voltage value of the secondary winding of a conventional transformer and the output switching voltage output by a relay, and can accurately regulate the voltage by outputting logic changes for several times by a monitor so as to accurately judge the action voltage value of a detected product.
Drawings
FIG. 1 is a schematic diagram of the constituent modules of the present invention.
Fig. 2 is a schematic circuit diagram according to a first embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a second embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the drawings and specific examples.
As shown in fig. 1, an automatic monitoring device for operating parameters of a circuit breaker, particularly relates to monitoring or checking the operating parameters of an undervoltage release, a shunt release and a closing electromagnet of a circuit breaker element (accessory). Including the pressure regulating unit, examined release, sensor and control appearance, the input and the electric wire netting of pressure regulating unit are connected, the output of pressure regulating unit with examine the release and be connected, it is connected with the sensor to examine the release, the sensor is connected with the control appearance, pressure regulating unit and control appearance interconnect, the sensor is used for the release to move the detection that whether the iron core motion targets in place, the control appearance is used for adjusting the output voltage of pressure regulating unit, accepts sensor signal.
The secondary of the transformer in the voltage regulating unit is a multi-winding transformer with voltage value coded according to 8-4-2-1 codes and a combination body which is controlled by a monitor and consists of a plurality of single-pole double-throw relays and electronic elements such as contacts of the multi-winding transformer and a plurality of silicon controlled rectifiers, the output voltage value of the secondary coil of the transformer in the voltage regulating unit is configured according to 8-4-2-1 weight values, or 8-4-2-1 weight voltage output is configured on a basic voltage value, the minimum value (unit is 1) of the 8-4-2-1 weight values can be 0.5V, 1V or other voltage values according to the requirement of detection precision, when 2 times of voltage is output, the output voltage is 1V or 2V or other values, and the rest can be analogized. The number of secondary windings is at least 1 and at most n. The voltage regulating unit contains relay, the single-pole double-throw switch of the relay can be combined in changing action, or the voltage regulating unit contains switch type electronic elements such as silicon controlled rectifier, etc., the combination of on-off of the electronic elements outputs continuously variable (non-instantaneous break) voltage.
The detected tripper comprises an undervoltage tripper for a circuit breaker, a shunt tripper and a closing electromagnet, the closing electromagnet comprises an instantaneous-action type or delay-action type electromagnet controlled by an electronic circuit, and the closing electromagnet is electromagnetic or permanent magnet type and moves an iron core to eject or retract after being electrified.
The sensor comprises a shielding type photoelectric sensor, a contact type sensor, a proximity switch and a sound sensor, wherein the shielding type photoelectric sensor, the contact type sensor, the proximity switch and the sound sensor are used for enabling the movable iron core of the electromagnet to move to the bottom.
The monitor is an intelligent instrument or a personal PC (personal computer) which can output and output digital quantity and has the functions of operation and the like, a packet has the communication function, an A/D (analog/digital) acquisition card, a USB (universal serial bus) interface and other functional components, and has the screen display function of LCD (liquid crystal display) graphics and the like. The monitor establishes an internal program in advance, namely a table for controlling the on-off of the secondary winding in the voltage regulating unit, and establishes the relation state between the voltage value output by each winding and the on-off device.
The output voltages of the secondary windings of the voltage regulating unit transformer are grouped according to a weight of 8-4-2-1, assuming that the weight of a first winding is 1V, the weight of a second winding is 2V, the weight of a third winding is 4V, the weight of a fourth winding is 8V, the weight of a fifth winding is 16V, and the like, the sum of the series connection of nine windings is 512V, the voltage resolution precision is 1V, if the weight of the first winding is 0.5V, the sum of the series connection of nine windings is 256V, the voltage resolution precision is 0.5V, if the weight of the first winding is 0.1V, the sum of the series connection of eight windings is 25.6V, and the voltage resolution precision is 0.1V. For the 'rough measurement', nine transformers with the winding weight of 1V already cover all trip voltage level products below 380V voltage level, for the 'fine measurement', for example, a shunt trip product for measuring the voltage level of 220V, the lowest action voltage is 220 x 0.7 to 154V, the secondary of the transformer is provided with a 'basic winding' output 140V, the basic winding is superposed with eight windings with the weight of 0.1V, the output voltage range is 152.5V-165.6V, and the voltage range of the upper and lower 8% of 154V can be accurately covered.
The output voltage of the secondary winding of the transformer is converted by the on-off of relay single-pole double-throw contact switches or electronic elements with the number corresponding to the number of windings. The monitor commands the switches to switch one by one in a positive or negative sequence to regulate the output voltage.
The detected tripper receives the output voltage of the voltage regulating unit, and determines whether to act or not or whether the fault reason does not act for a long time under the action of an internal electronic circuit.
The sensor is used for sensing whether the movable iron core of the release is operated or not and sending a signal to be detected by the monitoring instrument.
The monitor collects signals sent by the sensor, if the tripper does not act, the switch in the voltage regulating unit is made to act sequentially, and the output voltage of the voltage regulating unit is gradually increased (or decreased) until the tripper acts or exceeds a set voltage limit (such as 10%). Once the sensor gives a signal, the monitor records the current action position, converts the voltage value output by the voltage regulating unit and further judges whether the tripper is qualified. The monitor sets up voltage class selection menus such as 110V, 220V and 380V, sets up tripper type menus such as undervoltage tripper or shunt tripper, and sets up selection buttons of 'rough measurement' or 'fine measurement'. Furthermore, the monitoring instrument adopts a method of coarse adjustment and fine adjustment firstly by optimizing an internal program, so that the detection time is shortened. Further, for the undervoltage release, the monitor makes the voltage regulating unit output the rising voltage, judge its action (actuation) voltage value, later makes the voltage regulating unit output the falling voltage, judge its instantaneous release (trip) voltage, if the undervoltage release is equipped with the delay value, the monitor directly makes the output voltage set to 0.5Ue, the monitor starts the counter of the internal time value at the same time, after receiving the sensor signal, the internal time value is displayed on the screen, check the delay value that the undervoltage release marks, judge the error of the delay value.
In fig. 2, A, B two ends are the primary of the transformer, which is connected with the network voltage, assuming that the secondary of the transformer is provided with 3 secondary windings, the windings are 1V, 2V and 4V, the common end (low end) is named as C end, the high end is named as H end, and the C end and the H end are connected with the trip to be detected.
If the relay moving contact is at the default position, the ends D and C are connected, the ends F and D are connected, the ends H and F are connected, and the output voltage is 0V; if the monitor makes the first relay powered, the contact of the first relay is changed from D-C connection to D-E connection, and the two ends of J-C output 1V voltage value; if the monitor makes the second relay powered, the second relay make contact is changed from F-D connection to F-G connection, and two ends of J-C output 2V voltage values; if the monitor makes the third relay get electric action, the third relay closes the contact and changes H-F connection into H-1 connection, two ends of J-C output 4V voltage value.
If the monitor makes three relays act simultaneously, the two J-C terminals output 7V voltage values, the voltage values output by the permutation and combination, and so on.
If the secondary winding of the transformer is 8 groups (1-2-4-8-16-32-64-128), and the lowest group is 1V, a continuous voltage value of 255V can be output. The lowest set is 2V, then a combination of varying voltage values of 510V can be output, still with a voltage regulation accuracy of 0.4%.
In fig. 3, the transformer secondary is provided with three windings, assuming that the winding is a basic voltage winding, such as 186V, the winding and the winding are connected with bidirectional thyristors S1-S4, and output 1V and 2V respectively, when S1 is turned off and S2 and S3 are turned on, the winding is added with output voltage, when S3 is turned off and S4 is turned on, the winding is added with output voltage, possible output voltage combinations are 186V, 187V, 188V and 189V, and the pull-in voltage of the undervoltage release for detecting 220V voltage level has the identification accuracy of 1V voltage value, and the transformer winding has a simple structure, the monitor makes the voltage regulating unit act for 4 times at most, so that rapidity is embodied, and the voltage regulation change is continuous regulation change.
Claims (5)
1. The utility model provides a circuit breaker working parameter automatic monitoring device which characterized in that: including the pressure regulating unit, examined release, sensor and control appearance, the input and the electric wire netting of pressure regulating unit are connected, the output of pressure regulating unit with examine the release and be connected, it is connected with the sensor to examine the release, the sensor is connected with the control appearance, pressure regulating unit and control appearance interconnect, the sensor is used for the release to move the detection that whether the iron core motion targets in place, the control appearance is used for adjusting the output voltage of pressure regulating unit, accepts sensor signal.
2. The automatic monitoring device for the operating parameters of the circuit breaker according to claim 1, characterized in that: the secondary of the transformer in the voltage regulating unit comprises a multi-winding transformer with voltage values coded according to 8-4-2-1 codes or a combination body which is controlled by a monitoring instrument and consists of a plurality of single-pole double-throw switch relays or a plurality of silicon controlled electronic elements, continuously variable and non-instantaneous voltage is output, and the output voltage value of the secondary coil of the transformer in the voltage regulating unit is configured according to a weight of 8-4-2-1 or 8-4-2-1 weight voltage output is configured on a basic voltage value.
3. The automatic monitoring device for the operating parameters of the circuit breaker according to claim 1, characterized in that: the detected tripper comprises an undervoltage tripper for a circuit breaker, a shunt tripper and a closing electromagnet, the closing electromagnet comprises an instantaneous-action type or delay-action type electromagnet controlled by an electronic circuit, and the closing electromagnet is electromagnetic or permanent magnet type and moves an iron core to eject or retract after being electrified.
4. The automatic monitoring device for the operating parameters of the circuit breaker according to claim 1, characterized in that: the sensor comprises a shielding type photoelectric sensor, a contact type sensor, a proximity switch and a sound sensor, wherein the shielding type photoelectric sensor, the contact type sensor, the proximity switch and the sound sensor are used for enabling the movable iron core of the electromagnet to move to the bottom.
5. The automatic monitoring device for the operating parameters of the circuit breaker according to claim 1, characterized in that: the monitoring instrument is an intelligent instrument or a personal computer which outputs and outputs digital quantity and has an operation function, comprises a communication component, an A/D acquisition card and a USB interface and has an LCD graphic screen display function, controls the on-off of a secondary winding in the voltage regulating unit and establishes the relation state of the voltage value output by each winding and an on-off device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110678264.2A CN113359020B (en) | 2021-06-18 | 2021-06-18 | Automatic monitoring device for working parameters of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110678264.2A CN113359020B (en) | 2021-06-18 | 2021-06-18 | Automatic monitoring device for working parameters of circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113359020A true CN113359020A (en) | 2021-09-07 |
| CN113359020B CN113359020B (en) | 2023-12-22 |
Family
ID=77535042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110678264.2A Active CN113359020B (en) | 2021-06-18 | 2021-06-18 | Automatic monitoring device for working parameters of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113359020B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116430134A (en) * | 2023-03-08 | 2023-07-14 | 上海正泰智能科技有限公司 | Undervoltage release detection method, detection device and storage medium |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109787A (en) * | 2007-08-31 | 2008-01-23 | 天津市百利电气有限公司 | Intelligent detecting device for under-voltage releasing equipment of breaker |
| CN101144848A (en) * | 2007-06-28 | 2008-03-19 | 天津市百利电气有限公司 | Multifunctional integrative life experimental platform and its control method |
| CN201051717Y (en) * | 2007-07-09 | 2008-04-23 | 俞跃华 | No contact binary transformer voltage-adjusting power supply |
| CN205176223U (en) * | 2015-12-10 | 2016-04-20 | 国网四川省电力公司广安供电公司 | Tester takes place for readable formula direct current |
| CN205754001U (en) * | 2016-06-17 | 2016-11-30 | 深圳市讯茂科技有限公司 | Program-controlled single phase ac regulation device |
| CN106887364A (en) * | 2017-03-06 | 2017-06-23 | 四川大能科技有限公司 | A kind of electromagnetic relay with adhesive effect detection function |
| CN107490761A (en) * | 2017-08-28 | 2017-12-19 | 浙江方圆电气设备检测有限公司 | The detection method and system of a kind of circuit breaker operation mechanism |
| CN107546047A (en) * | 2016-10-19 | 2018-01-05 | 河南众联云科工程技术有限公司 | Division state-detection breaker |
| CN107966656A (en) * | 2017-11-30 | 2018-04-27 | 蒋小辉 | A kind of matrix form electromagnetic relay intelligent comprehensive parameter detection device |
| CN110749819A (en) * | 2019-11-20 | 2020-02-04 | 中国南方电网有限责任公司超高压输电公司广州局 | Circuit breaker divide-shut brake dropout action voltage testing arrangement |
| CN112230139A (en) * | 2020-10-21 | 2021-01-15 | 云南电网有限责任公司昆明供电局 | Special quick check gauge of portable time relay |
| CN112731136A (en) * | 2021-01-07 | 2021-04-30 | 石家庄先润贸易有限公司 | Relay testing device for recording and leveling absorption and release voltage for multiple times |
-
2021
- 2021-06-18 CN CN202110678264.2A patent/CN113359020B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144848A (en) * | 2007-06-28 | 2008-03-19 | 天津市百利电气有限公司 | Multifunctional integrative life experimental platform and its control method |
| CN201051717Y (en) * | 2007-07-09 | 2008-04-23 | 俞跃华 | No contact binary transformer voltage-adjusting power supply |
| CN101109787A (en) * | 2007-08-31 | 2008-01-23 | 天津市百利电气有限公司 | Intelligent detecting device for under-voltage releasing equipment of breaker |
| CN205176223U (en) * | 2015-12-10 | 2016-04-20 | 国网四川省电力公司广安供电公司 | Tester takes place for readable formula direct current |
| CN205754001U (en) * | 2016-06-17 | 2016-11-30 | 深圳市讯茂科技有限公司 | Program-controlled single phase ac regulation device |
| CN107546047A (en) * | 2016-10-19 | 2018-01-05 | 河南众联云科工程技术有限公司 | Division state-detection breaker |
| CN106887364A (en) * | 2017-03-06 | 2017-06-23 | 四川大能科技有限公司 | A kind of electromagnetic relay with adhesive effect detection function |
| CN107490761A (en) * | 2017-08-28 | 2017-12-19 | 浙江方圆电气设备检测有限公司 | The detection method and system of a kind of circuit breaker operation mechanism |
| CN107966656A (en) * | 2017-11-30 | 2018-04-27 | 蒋小辉 | A kind of matrix form electromagnetic relay intelligent comprehensive parameter detection device |
| CN110749819A (en) * | 2019-11-20 | 2020-02-04 | 中国南方电网有限责任公司超高压输电公司广州局 | Circuit breaker divide-shut brake dropout action voltage testing arrangement |
| CN112230139A (en) * | 2020-10-21 | 2021-01-15 | 云南电网有限责任公司昆明供电局 | Special quick check gauge of portable time relay |
| CN112731136A (en) * | 2021-01-07 | 2021-04-30 | 石家庄先润贸易有限公司 | Relay testing device for recording and leveling absorption and release voltage for multiple times |
Non-Patent Citations (1)
| Title |
|---|
| 李传信 等: "采用二进制绕组变压器的交流稳压器", 电力电子技术, no. 1, pages 74 - 76 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116430134A (en) * | 2023-03-08 | 2023-07-14 | 上海正泰智能科技有限公司 | Undervoltage release detection method, detection device and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113359020B (en) | 2023-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107478985B (en) | On-load tap-changer state on-line monitoring device and monitoring method thereof for transformer | |
| WO2020133796A1 (en) | Plc control-based full-automatic batch current transformer verification device | |
| CN102353895B (en) | Low voltage breaker life automatic test apparatus | |
| CN101464496B (en) | Overload reliability test assembly for plastic case breakers and implementing method thereof | |
| CN2901330Y (en) | AC/DC withstand voltage insulation detector with high precision and high speed detecting and control circuit | |
| CN103487699B (en) | The digital detection system of earth leakage protective device and high-precision detection method | |
| CN101900771A (en) | RCD (Residual Current Device) detection device and detection method | |
| CN202210139U (en) | Device capable of automatically testing service lifetime of low voltage breaker | |
| CN1988098A (en) | Controller for digital control and protective switch appliance | |
| CN113359020B (en) | Automatic monitoring device for working parameters of circuit breaker | |
| CN113687220A (en) | Simulation device and method for spring energy storage type vacuum circuit breaker | |
| CN205562759U (en) | Miniature circuit breaker capability test device | |
| CN110954766A (en) | Voltage and current type feeder automatic testing method | |
| CN101109787A (en) | Intelligent detecting device for under-voltage releasing equipment of breaker | |
| CN109387683B (en) | Adaptive sampling circuit and method for alternating current and direct current voltage and current signals | |
| CN207352094U (en) | Three-phase alternating current capacitor durability test equipment | |
| CN100353175C (en) | Test device for small breaker reliability | |
| EP0046024A1 (en) | Earth leakage current breaker | |
| CN108181581B (en) | Intelligent testing device and testing method for residual current operated protector | |
| CN109696626B (en) | Action range test device for control and protection switch electric appliance and application | |
| CN202421793U (en) | Synchronous switch control device | |
| CN201382994Y (en) | Overload reliability test device for molded case circuit breaker | |
| CN113791344B (en) | Switching test loop and method for switching current of high-voltage isolating switch | |
| CN105634123A (en) | Automatic low-voltage circuit breaker control apparatus with remote monitoring function and application therefor | |
| CN100368819C (en) | Reliability tester for electric leakage protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |