CN111157888A - Intermediate relay contact point rapid detector and detection method thereof - Google Patents
Intermediate relay contact point rapid detector and detection method thereof Download PDFInfo
- Publication number
- CN111157888A CN111157888A CN202010070004.2A CN202010070004A CN111157888A CN 111157888 A CN111157888 A CN 111157888A CN 202010070004 A CN202010070004 A CN 202010070004A CN 111157888 A CN111157888 A CN 111157888A
- Authority
- CN
- China
- Prior art keywords
- normally
- relay
- tested
- intermediate relay
- switch
- 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
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 238000004804 winding Methods 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 230000009191 jumping Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 238000012031 short term test Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing 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
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention provides a rapid detector for contact points of an intermediate relay and a detection method thereof.A normally open loop or a normally closed loop is detected by an indicator lamp LH, a switch SB is pressed to measure the normally open loop, the switch SB is disconnected to measure the normally closed loop, whether a fault point exists in the detected loop can be obtained directly through reading of a resistance meter, then each branch switch is pressed in sequence, and the fault point is found out by reading the resistance value of the resistance meter, so that each contact point does not need to be measured independently, the time is saved, the safety is ensured, and unnecessary expenses are reduced.
Description
Technical Field
The invention belongs to the technical field of auxiliary detection equipment of relays, and particularly relates to a rapid detector for an intermediate relay contact point and a detection method thereof.
Background
The intermediate relay is good in sealing, convenient to replace in a plugging mode, and wide in application range in electrical equipment control, protection circuits, intermediate conversion, thermal control DCS and PLC output circuits, especially MY4 and MY2 intermediate relays are widely applied in control equipment due to the fact that normally open and normally closed contacts are multiple, and the intermediate relay is normally open and normally closed and has 8 pairs of contacts, after a control circuit fault, due to the fact that the contacts are multiple and bring inconvenience for analysis and judgment, the fault cannot be cut off quickly. When equipment is regularly repaired, the relay and the contact are measured one by one, a large amount of time and energy are wasted, especially, reasonable measurement can not be found for the normally open contact, and once the error judgment is made, potential safety hazards are buried in the running of the unit. If the relay is located at an important part, once the contact of the relay is poor, the light relay causes misoperation and refusal operation of the operating equipment, and the heavy relay affects the normal operation of the unit and causes safety accidents. However, if the relays are completely replaced, the number is huge, and the cost is considerable.
Disclosure of Invention
The invention aims to provide a rapid detector for an intermediate relay contact point and a detection method thereof, so as to rapidly detect whether a fault point exists in a detected relay.
In order to achieve the purpose, the invention adopts the technical scheme that: an intermediate relay contact point rapid detector includes:
the charging module is used for charging the direct-current power supply U1;
the input end of the voltage conversion module is connected with the direct current power supply U1 and is used for converting the direct current power supply U1 into an alternating current output end with a plurality of gears;
the two ends of a coil of the relay KP to be tested are selectively connected in parallel to a gear matched with the voltage required by the relay KP to be tested;
four public ends and four normally-open ends of a relay KP to be tested are connected in series in sequence to form a normally-open loop, four public ends and four normally-closed ends of the relay KP to be tested are connected in series in sequence to form a normally-closed loop, a branch switch is in short circuit between any one public end of the relay KP to be tested and the normally-open end and the normally-closed end corresponding to the public end, a normally-closed contact of an intermediate relay KA is connected in series between the branch switch and the normally-closed end, a normally-open contact of the intermediate relay KA is connected in series between the branch switch and the normally-open end, and a resistance meter is in short circuit between one public end on the normally-open loop and one public end on the normally-closed;
the coil of the intermediate relay KA is connected in parallel with one output end of the voltage conversion module and used for switching the conduction state of the normally open loop and the normally closed loop after power is supplied;
the resistance meter is used for respectively measuring the resistance values of the normally open loop and the normally closed loop and achieving the rapid detection of the fault point of the relay KP to be detected by controlling the conduction state of the branch circuit switch;
and the indicating lamp LH is connected in parallel with one output end of the voltage conversion module and is used for displaying whether the detected circuit is a normally open circuit or a normally closed circuit.
Further, the charging module includes a charging socket P1 and a diode D1, the charging socket P1 and the diode D1 are connected in series and then connected to two ends of the dc power supply U1, and a forward output end of the diode D1 is connected to an anode of the dc power supply U1.
Further, the voltage conversion module includes a triode Q1, a resistor R1, a switch SB and a transformer T1, an output end of the transformer T1 has a plurality of ac gears, an input end of the transformer T1 includes a winding L1 and a winding L2 which are connected in series, a common end of the winding L1 and the winding L2 is connected to an anode of a dc power supply U1 through the switch SB, a free end of the winding L2 is connected to a base of the triode Q1 through the resistor R1, an emitter of the triode Q1 is connected to a cathode of the dc power supply U1, and a free end of the winding L1 is connected to a collector of the triode Q1.
Further, the plurality of alternating current gears are respectively 12V, 24V, 48V, 110V and 220V, and the coil of the intermediate relay KA and the indicator lamp LH are connected in parallel to two ends of the 220V alternating current.
Further, the dc power supply U1 is a +3V dc power supply.
A detection method of a rapid detector for an intermediate relay contact point comprises a normally open loop detection and a normally closed loop detection,
wherein, normally open the return circuit and detect including following step:
step one, pressing a switch SB, lighting an indicator light, and electrifying coils of an intermediate relay KA and a relay KP to be detected;
step two, after the coil of the relay KP to be tested is electrified, the normally open loop is conducted, the resistance value of the normally open loop is read through the resistance meter, and if the resistance value is zero, the normally open end of the relay KP to be tested does not have a fault point; if the resistance value is not zero, indicating that a fault point exists in the normally opened end of the relay KP to be tested, and jumping to the third step;
step three, sequentially pressing each branch switch, and finding out a fault point by reading the resistance value of the resistance meter;
the detection of the normally closed loop comprises the following steps:
step one, a switch SB is disconnected, an indicator lamp is turned off, and the coils of an intermediate relay KA and a relay KP to be detected lose power;
step two, after the coil of the relay KP to be tested loses power, the normally closed loop is conducted, the resistance value of the normally closed loop is read through the resistance meter, if the resistance value is zero, the fact that no fault point exists in the normally closed end of the relay KP to be tested is indicated, if the resistance value is not zero, the fact that a fault point exists in the normally closed end of the relay KP to be tested is indicated, and the step three is skipped;
sequentially pressing each branch switch, and reading the resistance value of the resistance meter to find out a fault point in the normally closed end;
compared with the prior art, the invention has the beneficial effects that: the normally open circuit or the normally closed circuit is detected by the indicator lamp LH, the switch SB is pressed to measure the normally open circuit, the switch SB is disconnected to measure the normally closed circuit, whether a fault point exists in the measured circuit can be obtained directly through the reading of the resistance meter, then each branch switch is pressed in sequence, and the fault point is found out through reading the resistance value of the resistance meter, so that each contact does not need to be measured independently, the time is saved, the safety can be ensured, and unnecessary expenditure is reduced.
Drawings
FIG. 1 is an internal circuit diagram of a rapid tester for contact points of an intermediate relay;
FIG. 2 is a schematic diagram of the connection relationship between an intermediate relay KA and a relay KP to be tested;
fig. 3 is a layout diagram of an end face of an intermediate relay contact point rapid detector.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 and 2, a contact point rapid detector for an intermediate relay includes:
the charging module is used for charging the direct-current power supply U1;
the input end of the voltage conversion module is connected with the direct current power supply U1 and is used for converting the direct current power supply U1 into an alternating current output end with a plurality of gears;
the two ends of a coil of the relay KP to be tested are selectively connected in parallel to a gear matched with the voltage required by the relay KP to be tested;
four public ends 9, 10, 12, 11 and four normally- open ends 5, 6, 8, 7 of the relay KP to be tested are connected in series in sequence to form a normally-open loop, four public ends 9, 10, 12, 11 and four normally-closed ends 1, 2, 4, 3 of the relay KP to be tested are connected in series in sequence to form a normally-closed loop, a branch switch is in short circuit between any one public end of the relay KP to be tested and the normally-open end and the normally-closed end corresponding to the public end, and the four branch switches are respectively SB1, SB2, SB3 and SB 4. A normally closed contact of the intermediate relay KA is connected in series between the branch switch and the normally closed end, a normally open contact of the intermediate relay KA is connected in series between the branch switch and the normally open end, and a resistance meter is in short circuit between a public end on the normally open loop and a public end on the normally closed loop;
the coil of the intermediate relay KA is connected in parallel with one output end of the voltage conversion module and used for switching the conduction state of the normally open loop and the normally closed loop after power is supplied;
the resistance meter is used for respectively measuring the resistance values of the normally open loop and the normally closed loop and achieving the rapid detection of the fault point of the relay KP to be detected by controlling the conduction state of the branch circuit switch;
and the indicating lamp LH is connected in parallel with one output end of the voltage conversion module and is used for displaying whether the detected circuit is a normally open circuit or a normally closed circuit.
As shown in FIG. 3, a socket for plugging and unplugging the relay KP to be tested, a switch SB, a plurality of branch switches, an indicator light LH and an adjusting piece for adjusting the gear of the alternating current output end are arranged on the upper end face of the rapid detector, and the relay KP to be tested can be directly plugged and unplugged during measurement, so that the rapid detector is convenient and simple.
Further, the charging module includes a charging socket P1 and a diode D1, the charging socket P1 and the diode D1 are connected in series and then connected to two ends of the dc power supply U1, and a forward output end of the diode D1 is connected to an anode of the dc power supply U1.
Further, the voltage conversion module includes a triode Q1, a resistor R1, a switch SB and a transformer T1, the size of the resistor R1 is 1 kilo-ohm, the output end of the transformer T1 has a plurality of ac gears, the input end of the transformer T1 includes a winding L1 and a winding L2 connected in series, a common end of the winding L1 and the winding L2 is connected to the positive electrode of the dc power supply U1 through the switch SB, the free end of the winding L2 is connected to the base of the triode Q1 through the resistor R1, the emitter of the triode Q1 is connected to the negative electrode of the dc power supply U1, the free end of the winding L1 is connected to the collector of the triode Q1, the triode Q1 may preferably adopt a D882-type triode, and here, the working principle of the voltage conversion module is: pressing a switch SB → the base b of the triode Q1 is electrified and conducted → the collector c and the emitter e of the triode Q1 are conducted → the coil L1 is electrified and generates counter electromotive force → the coil L2 generates induced electromotive force and adds the induced electromotive force to a loop of the base b to cause the voltage of the base b to be reduced and cut off → the collector c and the emitter e of the triode Q1 to be cut off, and the steps are repeated to generate induced voltage on a secondary winding of a transformer, and the number of turns of the reasonably wound coil meets the required voltage.
Further, the plurality of alternating current gears are respectively 12V, 24V, 48V, 110V and 220V, and the coil of the intermediate relay KA and the indicator lamp LH are connected in parallel to two ends of the 220V alternating current.
Furthermore, the direct current power supply U1 is a +3V direct current power supply, and specifically adopts a 5000mAH high-capacity lithium ion battery capable of being repeatedly charged and discharged to supply power, the lithium ion battery can be charged by a highlight flashlight 4.8V charger, and the battery can be uninterruptedly used for more than ten hours after being fully charged once, so that the difficulty that no construction power supply exists in a construction site is well solved.
A detection method of a rapid detector for an intermediate relay contact point comprises a normally open loop detection and a normally closed loop detection,
wherein, normally open the return circuit and detect including following step:
step one, pressing a switch SB, lighting an indicator light, and electrifying coils of an intermediate relay KA and a relay KP to be detected;
step two, after the coil of the relay KP to be tested is electrified, the normally open loop is conducted, the resistance value of the normally open loop is read through the resistance meter, and if the resistance value is zero, the normally open end of the relay KP to be tested does not have a fault point; if the resistance value is not zero, indicating that a fault point exists in the normally opened end of the relay KP to be tested, and jumping to the third step;
step three, sequentially pressing each branch switch, and finding out a fault point by reading the resistance value of the resistance meter;
the detection of the normally closed loop comprises the following steps:
step one, a switch SB is disconnected, an indicator lamp is turned off, and the coils of an intermediate relay KA and a relay KP to be detected lose power;
step two, after the coil of the relay KP to be tested loses power, the normally closed loop is conducted, the resistance value of the normally closed loop is read through the resistance meter, if the resistance value is zero, the fact that no fault point exists in the normally closed end of the relay KP to be tested is indicated, if the resistance value is not zero, the fact that a fault point exists in the normally closed end of the relay KP to be tested is indicated, and the step three is skipped;
sequentially pressing each branch switch, and reading the resistance value of the resistance meter to find out a fault point in the normally closed end;
the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. The utility model provides an intermediate relay contact point short-term test appearance which characterized in that includes:
the charging module is used for charging the direct-current power supply U1;
the input end of the voltage conversion module is connected with the direct current power supply U1 and is used for converting the direct current power supply U1 into an alternating current output end with a plurality of gears;
the two ends of a coil of the relay KP to be tested are selectively connected in parallel to a gear matched with the voltage required by the relay KP to be tested;
four public ends and four normally-open ends of a relay KP to be tested are connected in series in sequence to form a normally-open loop, four public ends and four normally-closed ends of the relay KP to be tested are connected in series in sequence to form a normally-closed loop, a branch switch is in short circuit between any one public end of the relay KP to be tested and the normally-open end and the normally-closed end corresponding to the public end, a normally-closed contact of an intermediate relay KA is connected in series between the branch switch and the normally-closed end, a normally-open contact of the intermediate relay KA is connected in series between the branch switch and the normally-open end, and a resistance meter is in short circuit between one public end on the normally-open loop and one public end on the normally-closed;
the coil of the intermediate relay KA is connected in parallel with one output end of the voltage conversion module and used for switching the conduction state of the normally open loop and the normally closed loop after power is supplied;
the resistance meter is used for respectively measuring the resistance values of the normally open loop and the normally closed loop and achieving the rapid detection of the fault point of the relay KP to be detected by controlling the conduction state of the branch circuit switch;
and the indicating lamp LH is connected in parallel with one output end of the voltage conversion module and is used for displaying whether the detected circuit is a normally open circuit or a normally closed circuit.
2. The rapid intermediate relay contact point detector according to claim 1, characterized in that: the charging module comprises a charging socket P1 and a diode D1, the charging socket P1 and the diode D1 are connected in series and then connected to two ends of a direct current power supply U1, and the positive output end of the diode D1 is connected with the positive electrode of a direct current power supply U1.
3. The rapid intermediate relay contact point detector according to claim 1, characterized in that: the voltage conversion module comprises a triode Q1, a resistor R1, a switch SB and a transformer T1, the output end of the transformer T1 is provided with a plurality of alternating current gears, the input end of the transformer T1 comprises a winding L1 and a winding L2 which are connected in series, the common ends of the winding L1 and the winding L2 are connected to the positive electrode of a direct current power supply U1 through the switch SB, the free end of the winding L2 is connected to the base electrode of the triode Q1 through a resistor R1, the emitter electrode of the triode Q1 is connected to the negative electrode of the direct current power supply U1, and the free end of the winding L1 is connected to the collector electrode of the triode Q1.
4. The rapid intermediate relay contact point detector according to claim 3, characterized in that: the alternating current gears are respectively 12V, 24V, 48V, 110V and 220V, and a coil of the intermediate relay KA and the indicator light LH are connected in parallel to two ends of the 220V alternating current.
5. The rapid intermediate relay contact point detector according to claim 4, characterized in that: the direct current power supply U1 is a +3V direct current power supply.
6. The method for detecting the intermediate relay contact point rapid detector according to any one of claims 1 to 5, characterized by comprising a normally open loop detection and a normally closed loop detection,
wherein, normally open the return circuit and detect including following step:
step one, pressing a switch SB, lighting an indicator light, and electrifying coils of an intermediate relay KA and a relay KP to be detected;
step two, after the coil of the relay KP to be tested is electrified, the normally open loop is conducted, the resistance value of the normally open loop is read through the resistance meter, and if the resistance value is zero, the normally open end of the relay KP to be tested does not have a fault point; if the resistance value is not zero, indicating that a fault point exists in the normally opened end of the relay KP to be tested, and jumping to the third step;
step three, sequentially pressing each branch switch, and finding out a fault point by reading the resistance value of the resistance meter;
the detection of the normally closed loop comprises the following steps:
step one, a switch SB is disconnected, an indicator lamp is turned off, and the coils of an intermediate relay KA and a relay KP to be detected lose power;
step two, after the coil of the relay KP to be tested loses power, the normally closed loop is conducted, the resistance value of the normally closed loop is read through the resistance meter, if the resistance value is zero, the fact that no fault point exists in the normally closed end of the relay KP to be tested is indicated, if the resistance value is not zero, the fact that a fault point exists in the normally closed end of the relay KP to be tested is indicated, and the step three is skipped;
and step three, sequentially pressing each branch switch, and reading the resistance value of the resistance meter to find out the fault point in the normally closed end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010070004.2A CN111157888B (en) | 2020-01-21 | 2020-01-21 | Intermediate relay contact point rapid detector and detection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010070004.2A CN111157888B (en) | 2020-01-21 | 2020-01-21 | Intermediate relay contact point rapid detector and detection method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111157888A true CN111157888A (en) | 2020-05-15 |
| CN111157888B CN111157888B (en) | 2024-07-02 |
Family
ID=70564902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010070004.2A Active CN111157888B (en) | 2020-01-21 | 2020-01-21 | Intermediate relay contact point rapid detector and detection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111157888B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666449A (en) * | 2020-12-30 | 2021-04-16 | 爱驰汽车有限公司 | Welding loop detector and detection method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08212880A (en) * | 1995-02-09 | 1996-08-20 | Meidensha Corp | Control circuit for circuit breaker |
| CN201717597U (en) * | 2010-07-12 | 2011-01-19 | 张汉全 | High-voltage power transmission line fault automatic switching-on and switching-off protection switch |
| CN204185139U (en) * | 2014-09-09 | 2015-03-04 | 广东省云浮市特种设备检验所 | A kind of hoisting crane auto-breaking triggers speed regulation device |
| CN204880205U (en) * | 2015-08-31 | 2015-12-16 | 大唐洛阳热电有限责任公司 | Boiler flame detecting system with protection device |
| CN205753375U (en) * | 2016-06-02 | 2016-11-30 | 国华(通辽)风电有限公司 | A kind of interim protective relaying device |
| CN206505159U (en) * | 2016-09-23 | 2017-09-19 | 上海地铁维护保障有限公司 | The test device of safety type relay |
| CN208860929U (en) * | 2018-08-28 | 2019-05-14 | 中国水利水电第十六工程局有限公司 | Intermediate relay checking table |
| CN110609226A (en) * | 2019-07-16 | 2019-12-24 | 广州炫通电气科技有限公司 | DC contactor pull-in release time detection circuit and method |
| CN110632444A (en) * | 2019-10-18 | 2019-12-31 | 国网辽宁省电力有限公司盘锦供电公司 | Detection system and detection method of grounding disconnecting link |
| CN211979134U (en) * | 2020-01-21 | 2020-11-20 | 大唐洛阳热电有限责任公司 | Intermediate relay contact point short-term test appearance |
-
2020
- 2020-01-21 CN CN202010070004.2A patent/CN111157888B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08212880A (en) * | 1995-02-09 | 1996-08-20 | Meidensha Corp | Control circuit for circuit breaker |
| CN201717597U (en) * | 2010-07-12 | 2011-01-19 | 张汉全 | High-voltage power transmission line fault automatic switching-on and switching-off protection switch |
| CN204185139U (en) * | 2014-09-09 | 2015-03-04 | 广东省云浮市特种设备检验所 | A kind of hoisting crane auto-breaking triggers speed regulation device |
| CN204880205U (en) * | 2015-08-31 | 2015-12-16 | 大唐洛阳热电有限责任公司 | Boiler flame detecting system with protection device |
| CN205753375U (en) * | 2016-06-02 | 2016-11-30 | 国华(通辽)风电有限公司 | A kind of interim protective relaying device |
| CN206505159U (en) * | 2016-09-23 | 2017-09-19 | 上海地铁维护保障有限公司 | The test device of safety type relay |
| CN208860929U (en) * | 2018-08-28 | 2019-05-14 | 中国水利水电第十六工程局有限公司 | Intermediate relay checking table |
| CN110609226A (en) * | 2019-07-16 | 2019-12-24 | 广州炫通电气科技有限公司 | DC contactor pull-in release time detection circuit and method |
| CN110632444A (en) * | 2019-10-18 | 2019-12-31 | 国网辽宁省电力有限公司盘锦供电公司 | Detection system and detection method of grounding disconnecting link |
| CN211979134U (en) * | 2020-01-21 | 2020-11-20 | 大唐洛阳热电有限责任公司 | Intermediate relay contact point short-term test appearance |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666449A (en) * | 2020-12-30 | 2021-04-16 | 爱驰汽车有限公司 | Welding loop detector and detection method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111157888B (en) | 2024-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203981788U (en) | A kind of photovoltaic combining inverter automatic detection device | |
| CN103412259B (en) | A kind of direct-current circuit breaker on-off characteristic test device | |
| CN201464600U (en) | Self-powered power failure indicator | |
| CN211979134U (en) | Intermediate relay contact point short-term test appearance | |
| CN107632198A (en) | A kind of dual power supply electric quantity collector and its application method | |
| CN111157888A (en) | Intermediate relay contact point rapid detector and detection method thereof | |
| CN207232252U (en) | A kind of dual power supply electric quantity collector | |
| CN204044246U (en) | A kind of square formation insulation impedance detection system of photovoltaic generating system | |
| CN205015399U (en) | Battery connection piece contact impedance measuring circuit | |
| CN201926752U (en) | Detection device for electric leakage detection alarm of electric fire control | |
| CN215934526U (en) | Domestic emergency power supply device with new energy automobile charge-discharge function | |
| CN206339637U (en) | A kind of power detecting system | |
| CN201237633Y (en) | Battery tester | |
| CN202870190U (en) | Comprehensive testing stand for charger used for electric bicycle | |
| CN206283309U (en) | A kind of 12V batteries photovoltaic commercial power complementation charge and discharge maintenance device | |
| CN201402298Y (en) | Detection device for anomaly detection of zero line and earth wire of leakage protection device | |
| CN210348270U (en) | Loop state detection device and detector | |
| CN1908687A (en) | Voltage type tester for short-circuit and earth-fault indicator | |
| CN113985846A (en) | Non-invasive charging pile interaction process time sequence state detection system and method | |
| CN107069922B (en) | Electrochemical cell charge-discharge current monitoring system and monitoring method for energy storage | |
| CN206237166U (en) | Electric power overhaul multi-mode electrically source device | |
| TWI518344B (en) | Microgrid fault detection method | |
| CN203119627U (en) | Intelligent comprehensive management system of base station power supply | |
| CN105891624A (en) | Solar photovoltaic charging and discharging controller simulation running environment detection system | |
| CN204696767U (en) | A kind of solar charging controller |
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 |