CN216771920U - Pull electronic isolator divide-shut brake circuit detection device of power supply - Google Patents
Pull electronic isolator divide-shut brake circuit detection device of power supply Download PDFInfo
- Publication number
- CN216771920U CN216771920U CN202123269811.6U CN202123269811U CN216771920U CN 216771920 U CN216771920 U CN 216771920U CN 202123269811 U CN202123269811 U CN 202123269811U CN 216771920 U CN216771920 U CN 216771920U
- Authority
- CN
- China
- Prior art keywords
- closing
- switching
- opening
- detection
- relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 123
- 238000010586 diagram Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 102220257505 rs61754178 Human genes 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Images
Landscapes
- Relay Circuits (AREA)
Abstract
The utility model discloses a detection device for a switching-on and switching-off loop of a traction power supply electric isolating switch, wherein the switching-off detection loop comprises a switching-off relay, a switching-off protection resistor and a switching-off detection lamp, the switching-off relay is connected with the switching-off protection resistor in series, and the switching-off detection lamp is connected to a normally open node of the switching-off relay; the closing detection circuit comprises a closing relay, a closing protection resistor and a closing detection lamp, the closing relay and the closing protection resistor are connected in series, and the closing detection lamp is connected to a normally open node of the closing relay; the opening detection loop and the closing detection loop are respectively connected with an air switch; the opening detection loop is connected in parallel with the terminals nearest to the two ends of the opening loop control node of the electric isolating switch, and the closing detection loop is connected in parallel with the terminals nearest to the two ends of the closing loop control node of the electric isolating switch. The device can detect the operation condition of the opening and closing circuit of the electric isolating switch on line in real time, can quickly early warn and remind an operator on duty to find faults in time.
Description
Technical Field
The utility model relates to the technical field of traction power supply, in particular to a detection device for an opening and closing circuit of a traction power supply electric isolating switch.
Background
The isolation switch of the traction substation is matched with a circuit breaker and an automation device to realize the back cut and distribution of a power supply of the substation, the state of the isolation switch directly influences the power supply access, the back cut and the feed-out of the traction substation, especially the back cut of the equipment during faults, if a standby incoming line is in voltage loss and a main transformer fault occurs, a backup automatic switching device starts the back cut, and when a feeder circuit breaker fails, the back cut of the backup circuit breaker needs an electric isolation switch to participate in switching-on and switching-off. When the electric elements in the control loop of the isolating switch have faults, such as the faults of a micro switch, an auxiliary switch and the like, the normal electric opening and closing of the isolating switch cannot be realized, the reverse switching of a power supply is influenced, and the fault time is prolonged.
The common switch failure reasons of the electric isolating switch are as follows:
1. motor body failure and thermal overload relay failure. The problems of the thermal element of the thermal relay belong to a motor loop and do not belong to the detection category of a control loop;
2. the contactor fails. The contactor is a common device for electric control, two contactors are generally adopted in an electric operating mechanism to complete the forward and reverse rotation control of a motor, and the fault phenomenon of the contactor in a control loop is that after a switch-on (switch-off) button is pressed, a coil of the contactor is normally powered on, but the contactor does not pull in.
3. The limit switch does not act in place or has poor contact. The limit switch synchronously rotates along with the isolating switch, the limit switch limits the opening and closing angle and enables the control circuit contactor to be powered off by disconnecting the control circuit, so that the control motor stops rotating, and meanwhile, when the limit switch rotates not in place or the contact point is in poor contact, the coil of the control circuit contactor cannot be electrified, so that the motor cannot be started, and the motion failure occurs.
4. The wiring is loose. The isolating switch is arranged at a position close to a railway, and the secondary line connection of a control loop is easy to loosen due to vibration caused by passing of a train, so that a terminal is in virtual connection, and the electric isolating switch rejects movement.
In the existing fault finding of the control loop of the electric disconnecting switch, technicians firstly remove mechanical clamping stagnation and motor loop faults according to fault phenomena after arriving at a site, and finally measure the potential conditions of all positions in the control loop by using a universal meter after judging that the disconnecting switch is the control loop fault, so that abnormal potentials are found, the fault range is gradually reduced by taking the abnormal potentials as the basis, and fault points are finally found. The process is complicated and needs to consume much time.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide a device for detecting the opening and closing loop of the traction power supply electric isolating switch, which can provide a detection and judgment light signal for operating personnel, alarm in case of abnormity and discover hidden dangers of the opening and closing loop of the traction power supply electric isolating switch in advance.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a detection device for an opening and closing loop of a traction power supply electric isolating switch comprises an opening detection loop and a closing detection loop; the opening detection circuit comprises an opening relay, an opening protection resistor and an opening detection lamp, wherein the opening relay is connected with the opening protection resistor in series, and the opening detection lamp is connected to a normally open node of the opening relay; the switching-on detection circuit comprises a switching-on relay, a switching-on protection resistor and a switching-on detection lamp, wherein the switching-on relay is connected with the switching-on protection resistor in series, and the switching-on detection lamp is connected to a normally open node of the switching-on relay; the opening detection loop and the closing detection loop are respectively connected with an air switch; the opening detection loop is connected in parallel with the terminals nearest to the two ends of the opening loop control node of the electric isolating switch, and the closing detection loop is connected in parallel with the terminals nearest to the two ends of the closing loop control node of the electric isolating switch.
Furthermore, the opening detection circuit also comprises an opening audio generation circuit which is connected with a normally closed node of the opening relay; the switching-on detection circuit further comprises a switching-on audio generation circuit, and the switching-on audio generation circuit is connected to a normally closed node of the switching-on relay.
Furthermore, the opening relay and the closing relay both adopt ohm dragon MY2N-GS type 48V/2600 omega relays, and the opening protection resistor and the closing protection resistor are both 1900 omega.
Furthermore, the device also comprises a plastic anti-static shell, wherein the switching-on relay, the switching-on protection resistor, the switching-off relay, the switching-off protection resistor, the switching-off audio generation circuit and the switching-on audio generation circuit are all arranged in the plastic anti-static shell, and the air switch, the switching-on detection lamp and the switching-off detection lamp are all exposed outside the plastic anti-static shell.
The utility model has the beneficial effects that: the device can detect the operation condition of the switching-on and switching-off loop of the electric disconnecting switch on line at any time, can quickly early warn and remind an operator on duty to carry out fault finding in time, thereby saving fault finding and troubleshooting time, improving the efficiency, improving the reliability of the whole traction power supply system by timely eliminating hidden dangers of control loop equipment, and avoiding railway traffic accidents.
Drawings
FIG. 1 is a schematic diagram of an Handan yellow feeder line electric isolating switch opening and closing loop;
FIG. 2 is a schematic diagram of simple connection between a detection device and an electric isolating switch opening and closing circuit in the embodiment of the utility model;
fig. 3 is a schematic diagram of the operation principle of the closing detection circuit and the closing circuit of the electric disconnecting switch in the embodiment of the present invention (the closing control node is disconnected);
fig. 4 is a schematic diagram of the operation principle of the closing detection circuit and the closing circuit of the electric disconnecting switch in the embodiment of the present invention (closing control node is closed);
FIG. 5 is a schematic diagram of the connection of the detection lamp and the audio generation circuit to the relay in the embodiment of the present invention;
FIG. 6 is a circuit diagram of the detecting device according to the embodiment of the present invention (the detecting lamp and the audio generating circuit are not shown);
FIG. 7 is a schematic diagram illustrating the specific connection between Handan yellow-line feeder and a detection device according to an embodiment of the present invention;
fig. 8 is a schematic wiring diagram of the detection device in the embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed implementation and the specific operation process are provided, but the protection scope of the present invention is not limited to the present embodiment.
The embodiment provides a pull power supply electric disconnecting switch on-off circuit detection device, and particularly relates to a device capable of detecting the running condition of an electric disconnecting switch on-off circuit on line at any time.
The detection device for the opening and closing circuit of the traction power supply electric isolating switch is realized based on a 'potential method' simulation fault finding principle. The point of "potential method" fault finding will be briefly described below by taking an example of an Handan yellow feeder 2111GK control loop. Fig. 1 shows the potential state of the 2111 electric isolating switch in normal operation, at this time, the positive electricity can be measured by using a multimeter to measure the terminals 5D1, 5D3 and 5D4, and the negative electricity can be measured by measuring the terminals 5D16, 5D6 and 5D 8. At this time, fault simulation is carried out, wherein the fault is 5D16 terminal connection loosening, and the fault phenomenon is 2111GK far direction rejection.
Before starting fault finding, firstly confirming that the disconnecting switch refuses to operate, namely, the fault of the control loop is caused, removing mechanical faults, motor faults and the like, then sequentially checking the potential of each terminal in the control loop by using a potential method through a universal meter, and in order to improve the fault finding efficiency, generally, the potential terminal detected in the first step is positioned at a more central position in the control loop, so that the direction of a fault point can be rapidly judged, and therefore, the universal meter is used for sequentially measuring 5D4 and 5D6, the 5D4 terminal is normally at a positive potential, the 5D6 terminal is at a negative potential, and due to the fault of the loop, the 5D6 terminal is actually measured to have no potential, and the phenomenon of negative electricity loss can help judge that the fault point of the control loop is between the 5D6 terminal and-KM.
According to a potential method, potential measurement is sequentially carried out on a 5D6 terminal close to a-KM terminal by using a universal meter, and finally the potential of a port under 7ZK is normal, and a 5D16 terminal is uncharged, so that the condition that the negative electricity of the port under 7ZK is led out and cannot reach a 5D16 terminal can be judged, and therefore, the wire connection between the port under 7ZK and the terminal under 5D16 is a fault point.
The detection device has a function of carrying out potential acquisition by simulating a 'potential method', namely the potential of the terminals 5D4, 5D6 and 5D8 can be measured, and if the potential is abnormal, logic is triggered to send out an alarm.
Through the research on the principle of the control loop of the electric isolating switch, in order to realize the real-time detection function in operation and prevent the device from influencing the normal operation of the control loop of the electric isolating switch, the detection device is required to be connected to two sides of an opening/closing control node in parallel, when the opening/closing control node is normally closed and the electric isolating switch is started to switch over, the detection device is just subjected to temporary short circuit, after the electric isolating switch is switched in place, the detection device is synchronously connected into the control loop again after the opening/closing control node is disconnected, and the detection function is continuously realized.
As shown in fig. 2, the terminals closest to both ends of the opening control node of the electric disconnecting switch and the closing control node of the electric disconnecting switch are respectively connected in parallel with an opening detection loop and a closing detection loop. The opening detection loop and the closing detection loop are composed of detection lamps, relays, protection resistors and the like. Therefore, when the isolating switch normally operates, the opening control node or the closing control node is disconnected, the opening detection loop or the closing detection loop is connected in series in the control loop, and the detecting device and the opening and closing contactor coil of the electric isolating switch are jointly separated to obtain a control bus voltage, namely DC 110V. Therefore, the relay and the protective resistor which are suitable in specification parameters need to be tested and selected, the relay of the detection loop is reliably powered under the normal operation state, one pair of normally open nodes is controlled to be reliably closed, the detection lamp under the control of the normally open nodes is enabled to be lightened, and therefore the integrity of the control loop of an attendant is promoted. When the online real-time detection function is met, attention is paid to the fact that an opening/closing relay of the electric isolating switch must be reliable and cannot act at the moment, otherwise the isolating switch is mistakenly operated, and accidents are caused.
Fig. 3-4 are schematic diagrams illustrating operation of the detection circuit, taking a closing circuit as an example. When the isolating switch normally acts, the closing control node is closed, the closing detection loop is temporarily in short circuit, the detection device is made to exit from operation, after the isolating switch acts, the closing control node is disconnected, the closing detection loop is continuously connected into the control loop, and the detection function is continuously realized. The brake-separating detection loop has the same principle.
Furthermore, after the detection loop is connected, in a normal operation state, a relay and a protective resistor of the opening or closing detection loop are connected with an opening or closing contactor coil of the electric isolating switch in series to perform voltage division. Therefore, the critical starting voltage of the opening and closing contactor of the electric isolating switch needs to be measured through tests, and then specific parameters of the coil internal resistance and the protective resistance of the relay selected in the detection loop are calculated in sequence. Finally, when the detection loop is connected with the opening and closing coils of the electric disconnecting switch in series, the voltage obtained by the opening and closing coils of the electric disconnecting switch is lower than the starting voltage of the electric disconnecting switch, so that the electric disconnecting switch is reliable and does not act.
Firstly, a relay protection tester is used for outputting direct-current voltage to an electric isolating switch coil, the initial value is 20V, the step length is 1V, the direct-current voltage is stably boosted, tests show that when the relay protection tester outputs 53V, the electric isolating switch coil starts to attract, and when the voltage is boosted to 55V or above, a contactor reliably attracts, so that the judgment shows that when a detection loop is connected, if the electric isolating switch is not mistakenly operated, the voltage of the dividing and closing contactor of the electric isolating switch is not higher than 53V. And then, measuring the direct current resistance of an opening coil and a closing coil of the electric disconnecting switch by using a universal meter to obtain 1250 omega. After the data are obtained, the relay and the protective resistor with proper specification parameters can be selected through calculation and analysis.
After the detection loop is connected to the control loop, the direct current resistance of a relay coil arranged in the detection device is set as R1, the direct current resistance of a coil of an opening/closing contactor of the electric disconnecting switch is set as R2, R2 is measured to be 1250 omega, the protection resistance is R, and the contact resistance of a wire resistance, a terminal connection position and the like is ignored. In this on state, the current is I.
Then: as is known, I-U2/r 2-U2/1250
The control loop relay coil voltage division U1 ═ r1 ═ I
Protective resistor dividing voltage U3 ═ R × I
110V formed by U1+ U2+ U3
Get U2 (R1/1250+ R/1250+1) ═ 110
The r2 operation critical voltage U2 is 55V after testing.
Obtaining: r1/1250+ R/1250 ═ 1, i.e., R1+ R ═ 1250 Ω.
At the moment, the sum of the internal resistance of the relay coil and the protective resistance in the detection device is larger than 1250 omega, so that the reliable non-action of the opening and closing contactor can be ensured. Meanwhile, when the relay is selected, the voltage divided by the relay coil is higher than the starting voltage of the relay coil, so that the relay in the detection loop can reliably act.
In order to select the relay and the protection resistor which meet the above conditions, the technical parameters of the relay are analyzed and tested. After research on the common relays in the market and combination with the requirements of the subject, the direct current relay which has a pair of normally open contacts, the starting voltage and the internal resistance of the coil can be matched with the protection resistor to be larger than 1250 omega, and the divided voltage also meets the starting voltage is finally selected. And finally, selecting an ohm dragon MY2 series relay through screening. An MY2N-GS type 48V/2600 omega relay can be selected specifically.
After a relay, a slide wire rheostat and an electric isolating switch opening or closing coil of a detection loop are connected in series, a relay protection tester is used for outputting direct current 110V voltage, the slide wire rheostat slides from high resistance to low resistance gradually, the resistance value of the rheostat after the relay of the detection loop acts reliably is tested, and meanwhile, a universal meter is used for measuring the voltage at two ends of the relay of the detection loop to be 50V.
From this calculation, it can be found that I50V/2600 Ω 0.019A
The switching contactor coil r2 is divided into the voltage U2 ═ 1250 Ω ═ 0.019A ═ 24V
The obtained protection resistor R has the divided voltage of U3-110V-U1-U2-36V
While the protection resistance R is 1894 Ω
Therefore, the detection circuit relay can be determined to be an ohm-dragon MY2N-GS type 48V/2600 omega relay, the protection resistor is 1900 omega, when the detection circuit is connected into the control circuit, the coil of the detection relay is powered on to reliably act, the warning lamp is controlled to be powered on through the normally open node, the partial pressure of the coil of the opening and closing contactor is controlled to be 24V and far lower than the action voltage 55V, and misoperation of the opening and closing contactor is effectively prevented.
Further, in this embodiment, the structure of various devices inside the main control room cabinet is combined, and the electrical components selected for use by the detection circuit are used, so that the detection circuit is arranged in the cuboid mechanism box of the plastic insulation shell. The air switch, the detection lamp and the external wiring terminal row are exposed, an internal wiring terminal row is required to be arranged in the shell, and two ohm dragon MY2N-GS type relays, protection resistors and the like are required to be arranged in the shell. Through measuring and plane distribution, inherit the compact and non-overstaffed shell inner space, the whole appearance is complete and light, the wiring is convenient, the use is convenient, the installation and other principles are facilitated, and the insulation material device box with the appropriate size and convenient hole opening is selected. Therefore, in the embodiment, the plastic type anti-static shell is adopted, has the properties of bending resistance, compression resistance, ageing resistance and the like, has the advantages of toughness, wear resistance, moisture resistance, corrosion resistance, heat insulation, shock resistance and the like, and is convenient to open holes.
Further, in this embodiment, the detection device is further provided with an opening audio generation circuit and a closing audio generation circuit, where the opening audio generation circuit and the closing audio generation circuit are respectively connected to the opening detection circuit and the opening detection circuit, and are configured to play a warning voice under the control of the opening detection circuit or the closing detection circuit. In this embodiment, the switching-off audio generating circuit and the switching-on audio generating circuit are buzzers.
It should be noted that, when detecting that the control loop of the electric disconnecting switch has a fault, the detection device sends an alarm by using an indicator light and a voice prompt mode to prompt an operator on duty to check the equipment, and the fault is reported and processed in time. The audio generation circuit is controlled to be started through the change of the position of the relay node, and warning voice is released out through the loudspeaker, so that the transformer substation watchman is prompted to check the running state of the equipment in time, faults are found in time and reported and repaired, and the fault finding and processing efficiency is improved.
Furthermore, an internal AC/DC power supply module is adopted to convert an external AC 220V or DC110V power supply into a DC 5V power supply for the audio generation circuit, and a DC 5V lithium battery can be used as the power supply of the audio generation circuit. The built-in direct current 5V lithium battery is a better scheme.
Fig. 5 is a schematic diagram of the operation of the closing detection circuit in this embodiment, the closing audio generation circuit is connected in series with the normally closed node of the relay in the closing detection circuit, the closing detection light is connected with the normally open node, fig. 5 shows the node position when the relay coil in the closing detection circuit is not powered, this state reflects the closing circuit fault of the electric isolating switch, the normally open contact is opened at this time, the indicator light is turned off, the normally closed contact is closed, and the buzzer HA1 sends out "closing circuit fault! "voice alarm.
In summary, the switching-on/off circuit detection device for the traction power supply electric disconnecting switch according to the embodiment includes, as shown in fig. 6, a switching-off detection circuit and a switching-on detection circuit; the switching-off detection loop comprises a switching-off relay (KM branch), a switching-off protection resistor R2, a switching-off detection lamp and a switching-off audio generation circuit, wherein the switching-off relay is connected with the switching-off protection resistor in series, the switching-off detection lamp is connected to a normally open node of the switching-off relay, and the switching-off audio generation circuit is connected to a normally closed node of the switching-off relay; the switching-on detection circuit comprises a switching-on relay (KM on), a switching-on protection resistor R1, a switching-on detection lamp and a switching-on audio generation circuit, wherein the switching-on relay is connected with the switching-on protection resistor in series, the switching-on detection lamp is connected to a normally open node of the switching-on relay, and the switching-on audio generation circuit is connected to a normally closed node of the switching-on relay; the opening detection loop and the closing detection loop are respectively connected with an air switch; two ends of the opening detection loop are respectively connected with the terminals which are nearest to two ends of the opening loop control node of the electric isolating switch, and two ends of the closing detection loop are respectively connected with the terminals which are nearest to two ends of the closing loop control node of the electric isolating switch.
Fig. 7 is a schematic circuit diagram of the combination of an Handan yellow-line feeder 2111 electric isolating switch and a detection device. The detection device of the opening and closing circuit of the electric isolating switch is connected with terminals 5D4, 5D6 and 5D8 in the control circuit of the electric isolating switch through a connecting wire for an outgoing wire terminal, after the wiring is finished, the detection device is closed, the ZK is opened, and the detection device can operate normally.
Fig. 8 is a schematic wiring diagram of the detecting device of the present embodiment.
Various corresponding changes and modifications can be made by those skilled in the art based on the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.
Claims (4)
1. A detection device for an opening and closing circuit of a traction power supply electric isolating switch is characterized by comprising an opening detection circuit and a closing detection circuit; the opening detection circuit comprises an opening relay, an opening protection resistor and an opening detection lamp, wherein the opening relay is connected with the opening protection resistor in series, and the opening detection lamp is connected to a normally open node of the opening relay; the switching-on detection circuit comprises a switching-on relay, a switching-on protection resistor and a switching-on detection lamp, wherein the switching-on relay is connected with the switching-on protection resistor in series, and the switching-on detection lamp is connected to a normally open node of the switching-on relay; the opening detection loop and the closing detection loop are respectively connected with an air switch; the opening detection loop is connected in parallel with the terminals nearest to the two ends of the opening loop control node of the electric isolating switch, and the closing detection loop is connected in parallel with the terminals nearest to the two ends of the closing loop control node of the electric isolating switch.
2. The device of claim 1, wherein the open-circuit detection circuit further comprises an open-circuit audio generation circuit, and the open-circuit audio generation circuit is connected to the normally closed node of the open-circuit relay; the switching-on detection circuit further comprises a switching-on audio generation circuit, and the switching-on audio generation circuit is connected to a normally closed node of the switching-on relay.
3. The device as claimed in claim 1, wherein the opening relay and the closing relay are ohmic switches MY2N-GS type 48V/2600 Ω relays, and the opening protection resistor and the closing protection resistor are 1900 Ω relays.
4. The device of claim 2, further comprising a plastic antistatic housing, wherein the closing relay, the closing protection resistor, the opening relay, the opening protection resistor, the opening audio generation circuit and the closing audio generation circuit are all disposed in the plastic antistatic housing, and the air switch, the closing detection lamp and the opening detection lamp are all exposed outside the plastic antistatic housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123269811.6U CN216771920U (en) | 2021-12-23 | 2021-12-23 | Pull electronic isolator divide-shut brake circuit detection device of power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123269811.6U CN216771920U (en) | 2021-12-23 | 2021-12-23 | Pull electronic isolator divide-shut brake circuit detection device of power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216771920U true CN216771920U (en) | 2022-06-17 |
Family
ID=81968244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123269811.6U Expired - Fee Related CN216771920U (en) | 2021-12-23 | 2021-12-23 | Pull electronic isolator divide-shut brake circuit detection device of power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216771920U (en) |
-
2021
- 2021-12-23 CN CN202123269811.6U patent/CN216771920U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106483423B (en) | Fault searching method and device for breaker opening electric loop | |
| CN110031756A (en) | A kind of method of D.C. contactor performance test conversion circuit and life test | |
| CN206685314U (en) | A kind of relay with load faulty detection function | |
| CN216771920U (en) | Pull electronic isolator divide-shut brake circuit detection device of power supply | |
| CN209821292U (en) | Test tool and test system of high-voltage distribution box | |
| CN109521311B (en) | Relay protection multi-outlet pressing plate measuring instrument | |
| CN204613737U (en) | Switch analogue means | |
| CN111443281B (en) | Electrical blocking device and circuit breaker or isolating switch | |
| CN212646860U (en) | Relay protection open-in and open-out test device | |
| CN107732864A (en) | Intelligent air switch system, mobile terminal and server | |
| CN210323132U (en) | Secondary wiring conversion device for mechanical characteristic test of circuit breaker | |
| CN207636718U (en) | A kind of circuit-breaker testing repairing auxiliary device | |
| CN201069463Y (en) | Quick diagnosis instrument for power loss of low-voltage control line | |
| CN219915854U (en) | Working performance testing device for CRH380B (C) motor train unit high-voltage vacuum circuit breaker | |
| CN217639420U (en) | Relay inspection device | |
| CN217606037U (en) | Portable relay contact reliability testing device | |
| CN107728051B (en) | Test method and test device for secondary control device and switch cabinet system | |
| CN218383106U (en) | Switch integration device for testing electronic and electrical components, testing system and vehicle | |
| CN212341388U (en) | Fault quick detector | |
| CN211653058U (en) | Portable protection test simulation handcart | |
| CN112053870B (en) | Time detection system, device and method for time relay of medium voltage distribution board | |
| RU2808777C1 (en) | Maximum current protection on reed switches | |
| CN216434172U (en) | Relay time parameter detection cable structure | |
| CN221124797U (en) | Two-wire system contact net switch fault detection system | |
| CN115327284B (en) | Standardized looped network box multifunctional test tool and use method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220617 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |