CN113745038B

CN113745038B - Isolation switch

Info

Publication number: CN113745038B
Application number: CN202111010949.6A
Authority: CN
Inventors: 张裕; 马利; 陈兴东; 史清璞; 常浩; 王佳艺; 邵士辉; 袁浩; 岳洋; 张雨卿
Original assignee: State Grid Corp of China SGCC; Maintenance Branch of State Grid Hebei Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Maintenance Branch of State Grid Hebei Electric Power Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2023-07-25
Anticipated expiration: 2041-08-31
Also published as: CN113745038A

Abstract

The invention discloses an isolating switch, and relates to the technical field of power equipment; the switch circuit comprises an isolating switch body, a switch circuit, a third relay KM3, a first normally-closed contact KM3-1 and a first interface J1, wherein the first power DC1 and the switch circuit are connected in series at the side of the isolating switch body, the third relay KM3, the first normally-closed contact KM3-1 and the first interface J1 are positioned at the side of the isolating switch body, the first interface J1 is electrically connected with the third relay KM3 to form a ground wire monitoring circuit, and the first normally-closed contact KM3-1 of the third relay KM3 is connected in series into the switch circuit; the isolating switch is better in use safety through the isolating switch body, the first power supply DC1, the third relay KM3, the first normally-closed contact KM3-1 of the third relay KM3, the first interface J1 and the like.

Description

Isolation switch

Technical Field

The invention relates to the technical field of power equipment, in particular to an isolating switch.

Background

One of the main services of the transformer substation is switching operation, and the isolating switch is widely used. In the operation process, the temporary grounding wire is often required to be dismounted, and the temporary grounding wire is not dismounted timely, so that a malignant event of closing with the grounding wire can be caused. The isolating switch cannot monitor the grounding wire in real time, and whether the grounding wire is correctly connected or disconnected cannot be guaranteed.

As shown in fig. 4, when the disconnecting switch needs to be overhauled, the opening button AN-1 is pressed, at this time, the closing circuit is turned on, the coil of the first relay KM1 is electrified, the first normally open contact KM1-2 of the first relay KM1 is closed, that is, the opening self-holding circuit is turned on, and the motor is kept running until the disconnecting switch is completely turned off. When the isolating switch is required to be closed, the closing button AN-2 is pressed to switch on a closing circuit, a coil of the second relay KM2 is electrified, a first normally open contact KM2-2 of the second relay KM2 is closed, the motor is kept running, the first travel switch SP1 is switched off until the closing is in place, the coil of the second relay KM2 is powered off, and the first normally open contact KM2-2 of the second relay KM2 is switched off.

Problems and considerations in the prior art:

how to solve the technical problem of poor safety of the isolating switch.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the isolating switch, which realizes better use safety of the isolating switch through an isolating switch body, a first power supply DC1, a third relay KM3, a first normally-closed contact KM3-1 of the third relay KM3, a first interface J1 and the like.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides an isolator includes isolator body and switch circuit, switch circuit is including being located the first power DC1 and the switching-on circuit of isolator body side series connection, still including being located the third relay KM3 of isolator body side, the first normally closed contact KM3-1 and the first interface J1 of third relay KM3, first interface J1 and third relay KM3 electricity are connected and are formed ground wire monitoring circuit, and the first normally closed contact KM3-1 of third relay KM3 is gone into the switching-on circuit in the cluster.

The further technical proposal is that: the automatic switching device is characterized by further comprising a first normally open contact KM3-2, a fourth relay KM4 and a first normally open contact KM4-1 of the third relay KM3, a third travel switch SP3 and an alarm device, wherein the first normally open contact KM3-2, the third travel switch SP3, the fourth relay KM4 and the first power supply DC1 are arranged on the side of the isolating switch body, the first normally open contact KM3-2, the fourth relay KM4 and the first power supply DC1 of the third relay KM3 are connected in series, the first normally open contact KM4-1 of the fourth relay KM4 is connected in parallel with the third relay KM3 after being connected in series with the alarm device, and the first normally open contact KM3-2, the fourth relay KM4, the first normally open contact KM4-1 of the fourth relay KM4, the third travel switch SP3 and the alarm device of the third relay KM4 form an alarm circuit.

The further technical proposal is that: the alarm device comprises an indicator lamp U1 and a sounder U2, wherein a first normally open contact KM4-1 of a fourth relay KM4, the indicator lamp U1 and the sounder U2 are connected in series and then connected with a third relay KM3 in parallel.

The further technical proposal is that: the sound generator U2 is a loudspeaker or a buzzer.

The further technical proposal is that: the device comprises a first interface J1, a second normally open contact KM3-3 of a third relay KM3, a recognizer U3, a controller U4 and a communication device U5, wherein the recognizer U3 is positioned at the first interface J1 and used for acquiring an identification code of a grounding wire, the second normally open contact KM3-3 of the third relay KM3 is connected with the controller U4 and communicated with the same, the recognizer U3 is connected with the third relay KM3 in parallel, the recognizer U3 is connected with an identification unit and communicated with the same, the recognizer U3 is connected with the controller U4 and communicated with the same, and the controller U4 is connected with the communication device U5 and communicated with the same.

The further technical proposal is that: the power supply further comprises a pull-up resistor R1, wherein the positive electrode of the first power supply DC1, the pull-up resistor R1, the second normally open contact KM3-3 of the third relay KM3 and the negative electrode of the first power supply DC1 are sequentially connected, and the connection point of the pull-up resistor R1 and the third relay KM3 is connected with the control end of the controller U4.

The further technical proposal is that: the controller U4 is a singlechip.

The further technical proposal is that: the identifier U3 is an RFID identifier, or the identifier U3 is a read-write device, and the read-write device is electrically connected and communicates with the first interface J1.

The further technical proposal is that: the device further comprises a switch K0 and a lockset used for locking the switch K0, wherein the switch K0 is connected with the first normally-closed contact KM3-1 of the third relay KM3 in parallel.

The further technical proposal is that: the switch circuit further comprises a brake separating button AN-1, a brake closing button AN-2, a first relay KM1 for controlling the brake separating of the isolating switch body, a first normally closed contact KM1-1 and a first normally open contact KM1-2 of the first relay KM1, a second relay KM2 for controlling the brake closing of the isolating switch body, a first normally closed contact KM2-1 and a first normally open contact KM2-2 of the second relay KM2, a first travel switch SP1 for knowing that the brake is closed and opened and a second travel switch SP2 for knowing that the brake separating is closed and opened, wherein the brake separating button AN-1, the first relay KM1, the first normally open contact KM1-2 of the first relay KM1, the first normally closed contact KM2-1 and the second travel switch SP2 of the first relay KM2 are combined into a brake circuit, and the brake separating button AN-1, the first normally closed contact KM2-1 of the second relay KM2, the first relay KM1 and the second travel switch SP2 are connected in series, and the first relay AN 1-2 of the brake separating button AN 1 is connected in parallel with the brake separating button AN 1; the switching-on button AN-2, the second relay KM2, a first normally-open contact KM2-2 of the second relay KM2, a first normally-closed contact KM1-1 of the first relay KM1 and a first travel switch SP1 form a switching-on circuit, the switching-on button AN-2, the first normally-closed contact KM1-1 of the first relay KM1, the second relay KM2 and the first travel switch SP1 are connected in series, and the first normally-open contact KM2-2 of the second relay KM2 is connected in parallel with the switching-on button AN-2; the switching-off circuit is connected in parallel with the switching-on circuit and then connected in series with the first power supply DC 1.

The beneficial effects of adopting above-mentioned technical scheme to produce lie in:

first, an isolator includes isolator body and switch circuit, switch circuit is including being located the first power DC1 and the switching-on circuit of isolator body side series connection, still including being located the third relay KM3 of isolator body side, the first normally closed contact KM3-1 and the first interface J1 of third relay KM3, first interface J1 and third relay KM3 electricity are connected and are formed ground wire monitoring circuit, and the first normally closed contact KM3-1 of third relay KM3 is gone into the switching-on circuit in the cluster. According to the technical scheme, the isolating switch is better in use safety through the isolating switch body, the first power supply DC1, the third relay KM3, the first normally-closed contact KM3-1 of the third relay KM3, the first interface J1 and the like.

The second, still include the first normally open contact KM3-2, fourth relay KM4, the first normally open contact KM4-1 of fourth relay KM4 that are located isolator body side and be used for knowing to close in place and closed third travel switch SP3 and alarm device, the first normally open contact KM3-2, third travel switch SP3, fourth relay KM4 and the first power DC1 of third relay KM3 establish ties, and the first normally open contact KM4-1 of fourth relay KM4 is parallelly connected with third relay KM3 after establishing ties with alarm device, the first normally open contact KM3-2, fourth relay KM4, the first normally open contact KM4-1 of fourth relay KM4, third travel switch SP3 and alarm device of third relay KM3 form alarm circuit. According to the technical scheme, alarm prompt is realized, and the use is more convenient.

Third, alarm device includes pilot lamp U1 and sounder U2, and the first normally open contact KM4-1 of fourth relay KM4, pilot lamp U1 and sounder U2 establish ties the back and connect in parallel with third relay KM 3. According to the technical scheme, audible and visual alarm is achieved, and the using effect is better.

Fourth, still include the second normally open contact KM3-3 of third relay KM3, be located the identifier U3, controller U4 and the communication device U5 that are used for acquireing earth connection identification code of first interface J1 side, the second normally open contact KM3-3 of third relay KM3 is connected and communicates with controller U4, identifier U3 is parallelly connected with third relay KM3, and identifier U3 is connected and communicates with the identification unit, and identifier U3 is connected and communicates with controller U4, and controller U4 is connected and communicates with communication device U5. According to the technical scheme, the specific grounding wire can be known, and the use is more convenient.

Fifth, still include switch K0 and be used for locking the tool to lock of switch K0, switch K0 is parallelly connected with the first normally closed contact KM3-1 of third relay KM 3. According to the technical scheme, the device is convenient to use during overhauling and debugging, and is more flexible and convenient.

See the description of the detailed description section.

Drawings

FIG. 1 is a schematic diagram of a switching circuit and ground monitoring circuit of the present invention;

FIG. 2 is a schematic block diagram of a ground side power supply circuit for use therewith;

FIG. 3 is a distribution diagram of an application scenario of the present invention;

fig. 4 is a schematic diagram of a prior art switching circuit.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.

Example 1:

as shown in fig. 1, the invention discloses AN isolating switch which comprises AN isolating switch body, a first power supply DC1 positioned at the side of the isolating switch body, a brake opening button AN-1, a brake closing button AN-2, a first travel switch SP1 used for knowing that the brake is in place and is opened, a second travel switch SP2 used for knowing that the brake is in place and is opened, a third travel switch SP3 used for knowing that the brake is in place and is closed, a first relay KM1 used for controlling the brake opening of the isolating switch body, a first normally closed contact KM1-1 and a first normally open contact KM1-2 of the first relay KM1, a second normally closed contact KM2-1 and a first normally open contact KM2-2 of the second relay KM2, a third relay KM3-1, a first normally open contact KM3-2 and a second normally open contact KM3, a fourth relay KM4, a first normally open contact KM4-1, a first normally closed contact K0, a U0 and a U1 indicator U1, a U1 and a communication indicator unit which are positioned at the side of the isolating switch, a communication device and AN indicator unit which are used for acquiring a communication interface of the U1 and the J1, the first power supply DC1, the opening button AN-1, the closing button AN-2, the first travel switch SP1, the second travel switch SP2, the third travel switch SP3, the first relay KM1, the second relay KM2, the third relay KM3, the fourth relay KM4, the switch K0, the lockset, the indicator lamp U1, the sounder U2, the pull-up resistor R1, the controller U4 and the communication device U5 are all positioned near the isolating switch body, the first interface J1 is positioned near the grounding point, the identifier U3 is located in the vicinity of the first interface J1.

As shown in fig. 1, the opening button AN-1, the first relay KM1, the first normally open contact KM1-2 of the first relay KM1, the first normally closed contact KM2-1 of the second relay KM2, and the second travel switch SP2 are combined into AN opening circuit, and the opening button AN-1, the first normally closed contact KM2-1 of the second relay KM2, the first relay KM1, and the second travel switch SP2 are sequentially connected, where the first normally open contact KM1-2 of the first relay KM1 is connected in parallel with the opening button AN-1.

As shown in fig. 1, the closing button AN-2, the second relay KM2, the first normally open contact KM2-2 of the second relay KM2, the first normally closed contact KM1-1 of the first relay KM1, the first travel switch SP1, the first normally closed contact KM3-1 of the third relay KM3, and the switch K0 form a closing circuit, and the closing button AN-2, the first normally closed contact KM1-1 of the first relay KM1, the second relay KM2, the first normally closed contact KM3-1 of the third relay KM3, and the first travel switch SP1 are sequentially connected, the first normally open contact KM2-2 of the second relay KM2 is parallel to the closing button AN-2, and the switch K0 is parallel to the first normally closed contact KM3-1 of the third relay KM 3.

As shown in fig. 1, the opening circuit and the closing circuit are connected in parallel and then connected in series with the first power supply DC1, and the opening circuit, the closing circuit and the first power supply DC1 form a switching circuit.

As shown in fig. 1, the first interface J1 is electrically connected with the third relay KM3 to form a ground monitoring circuit.

As shown in fig. 1, the first normally open contact KM3-2, the third travel switch SP3, the fourth relay KM4 and the first power supply DC1 of the third relay KM3 are connected in series, and the first normally open contact KM4-1, the indicator lamp U1 and the sounder U2 of the fourth relay KM4 are connected in sequence and then connected in parallel with the third relay KM3, and the first normally open contact KM3-2, the fourth relay KM4, the first normally open contact KM4-1, the third travel switch SP3, the indicator lamp U1 and the sounder U2 of the third relay KM3 form an alarm circuit.

As shown in fig. 1, the positive pole of the first power supply DC1, the pull-up resistor R1, the second normally open contact KM3-3 of the third relay KM3, and the negative pole of the first power supply DC1 are sequentially connected, the connection point of the pull-up resistor R1 and the third relay KM3 is connected to the P0.0 end of the controller U4 and communicates with each other, the identifier U3 is connected in parallel with the third relay KM3, the identifier U3 is connected to and communicates with the controller U4, and the controller U4 is connected to and communicates with the communication device U5.

The sound generator U2 is a buzzer, the controller U4 is a singlechip, and the identifier U3 is an RFID identifier.

The isolating switch body, the first power supply DC1, the opening button AN-1, the closing button AN-2, the first to third travel switches SP1 to SP3, the first to fourth relays KM1 to KM4, the switch K0, the lock, the indicator lamp U1, the buzzer, the singlechip, the communication device U5, the first interface J1, the RFID identifier and the corresponding communication connection technology are not described in detail in the prior art.

Description of example 1 use:

as shown in fig. 2, the second power supply DC2, the second interface J2, the photovoltaic charging unit and the identification unit with the ground wire identification code are installed on the ground wire, the second power supply DC2, the second interface J2, the photovoltaic charging unit and the identification unit are all located on the ground wire, the second power supply DC2 is electrically connected with the second interface J2 to form a ground wire side power supply circuit, and the photovoltaic charging unit is connected with the second power supply DC2 in series.

The second interface J2 is in plug-in fit with the first interface J1, and the second power supply DC2 is connected with the third relay KM3 in series or disconnected.

The identification unit is an RFID tag, and the RFID identifier is in wireless connection and communication with the RFID tag.

The second power supply DC2, the second interface J2, the ground wire, the photovoltaic charging unit, the RFID tag itself, and the corresponding communication connection technology are not described in detail herein for the prior art.

1. After the grounding point of the second isolating switch G2 is connected with the grounding wire, the second interface J2 is connected with the first interface J1, and the coil of the third relay KM3 is electrified, so that the first normally-closed contact KM3-1 of the third relay KM3 is opened, a closing circuit of the second isolating switch G2 cannot work, and safety is ensured.

2.1, when the second isolating switch G2 needs to be overhauled, the isolating switch needs to be closed. Before the isolating switch needs to be closed, the switch-off state is adopted, the SP2 is in a switch-off state, the coil of the first relay KM1 is in a non-electricity state, the first normally-closed contact KM1-1 of the first relay KM1 is closed, the unlocking switch K0 enables the switch K0 to be closed, the switch-on button AN-2 is pressed down to enable a switch-on circuit to be switched on, the coil of the second relay KM2 is electrified, the normally-open contact KM2-2 of the second relay KM2 is closed, the motor is kept running, after the switch-on is in place, the travel switch SP1 is switched off, the coil of the second relay KM2 is in a non-electricity state, and the normally-open contact KM2-2 of the second relay KM2 is switched off. At this time, the third travel switch SP3 is turned on to charge the coil of the fourth relay KM4, the normally open contact KM4-1 of the fourth relay KM4 is turned on to turn on the alarm circuit, and the alarm device sends out an audible and visual alarm to prompt the field personnel that the ground wire is connected.

2.2, when the second isolating switch G2 is opened, the opening button AN-1 is pressed, at the moment, the normally closed contact KM2-1 of the second relay KM2 is closed, the second travel switch SP2 is closed, the opening circuit is conducted, the coil of the first relay KM1 is electrified, the normally open contact KM1-2 of the first relay KM1 is closed, namely, the opening self-retaining circuit is conducted, and the motor is kept running. Until the opening is in place, the third travel switch SP3 is turned off, so that the coil of the fourth relay KM4 is powered off, and the audible and visual alarm device stops notifying.

3. The second interface J2 is connected to the first interface J1, the coil of the third relay KM3 is powered on, the normally open contact KM3-3 of the third relay KM3 is closed, a signal circuit is conducted, a signal accessed by a grounding wire is transmitted to the controller U4, the RFID identifier reads the grounding wire identification code from the RFID tag in a wireless mode and informs the controller U4, the communication device U5 has a positioning function, and the controller U4 informs the monitoring station of the grounding wire identification code and the position accessed by the grounding wire through the communication device U5 so as to further manage and use.

4. The second isolating switch G2 prohibits closing during normal condition maintenance.

5. When the second disconnecting link G2 needs to be overhauled, as the self grounding disconnecting link D2 and the disconnecting link thereof have a mechanical locking relationship, the grounding disconnecting link D2 cannot be separated and combined when being combined, so that the self grounding disconnecting link is required to be disconnected, and a temporary grounding wire is hung. Therefore, when the ground wire is hung, the isolating switch is switched on, and the system can give out audible and visual alarm.

As shown in fig. 3, the first disconnector G1, the first circuit breaker DL1 and the second disconnector G2 are connected in sequence, and the third disconnector G3, the second circuit breaker DL2 and the fourth disconnector G4 are connected in sequence. When the circuit has maintenance work, the second isolating switch G2 needs maintenance, and the grounding disconnecting switch D2 cannot be closed at the moment, so that a temporary grounding wire needs to be hung on the grounding disconnecting switch D2 side of the second isolating switch G2. The second isolating switch G2 has a mechanical locking relation with the grounding switch D2, and the second isolating switch G2 cannot be closed under the condition that the grounding switch D2 is closed. This part is the prior art and will not be described in detail.

Example 2:

embodiment 2 is different from embodiment 1 in that the sounder U2 is a horn, the identification unit is a memory, the identifier U3 is a read-write device, the memory is electrically connected and communicated with the second interface J2, the read-write device is electrically connected and communicated with the first interface J1, and the read-write device is electrically connected and communicated with the memory through the communicated interface.

The invention discloses AN isolating switch which comprises AN isolating switch body, a first power DC1 positioned at the side of the isolating switch body, a brake opening button AN-1, a brake closing button AN-2, a first travel switch SP1 used for acquiring the in-place and open state of brake opening, a second travel switch SP2 used for acquiring the in-place and open state of brake opening, a third travel switch SP3 used for acquiring the in-place and open state of brake closing, a first relay KM1 used for controlling the brake opening of the isolating switch body, a first normally closed contact KM1-1 and a first normally open contact KM1-2 of the first relay KM1, a second normally closed contact KM2-1 and a first normally closed contact KM2-2 of the second relay KM2, a third relay KM3, a first normally closed contact KM3-1 of the third relay KM3, a first normally open contact KM3-2 and a second normally open contact KM3-3, a fourth relay KM4, a first normally open contact KM4-1 of the fourth relay KM4, a switch K0, a second normally closed contact KM 0, a U0 used for controlling the isolating switch body to be switched on, a U1 and a U1 identifier and a U1 interface identifier and a U1 which are positioned at the side of a communication interface, the first power supply DC1, the opening button AN-1, the closing button AN-2, the first travel switch SP1, the second travel switch SP2, the third travel switch SP3, the first relay KM1, the second relay KM2, the third relay KM3, the fourth relay KM4, the switch K0, the lockset, the indicator lamp U1, the sounder U2, the pull-up resistor R1, the controller U4 and the communication device U5 are all positioned near the isolating switch body, the first interface J1 is positioned near the grounding point, the identifier U3 is located in the vicinity of the first interface J1.

The opening button AN-1, the first relay KM1, the first normally-open contact KM1-2 of the first relay KM1, the first normally-closed contact KM2-1 of the second relay KM2 and the second travel switch SP2 are combined into AN opening circuit, the opening button AN-1, the first normally-closed contact KM2-1 of the second relay KM2, the first relay KM1 and the second travel switch SP2 are sequentially connected, and the first normally-open contact KM1-2 of the first relay KM1 is connected in parallel with the opening button AN-1.

The switching-on button AN-2, the second relay KM2, the first normally-open contact KM2-2 of the second relay KM2, the first normally-closed contact KM1-1 of the first relay KM1, the first travel switch SP1, the first normally-closed contact KM3-1 of the third relay KM3 and the switch K0 form a switching-on circuit, the switching-on button AN-2, the first normally-closed contact KM1-1 of the first relay KM1, the second relay KM2, the first normally-closed contact KM3-1 of the third relay KM3 and the first travel switch SP1 are sequentially connected, the first normally-open contact KM2-2 of the second relay KM2 is connected with the switching-on button AN-2 in parallel, and the switch K0 is connected with the first normally-closed contact KM3-1 of the third relay KM3 in parallel.

The switching-off circuit is connected in parallel with the switching-on circuit and then connected with the first power supply DC1 in series, and the switching-off circuit, the switching-on circuit and the first power supply DC1 form a switching circuit.

The first interface J1 is electrically connected with the third relay KM3 to form a ground wire monitoring circuit.

The first normally open contact KM3-2, the third travel switch SP3, the fourth relay KM4 and the first power DC1 of the third relay KM3 are connected in series, the first normally open contact KM4-1, the indicator lamp U1 and the sounder U2 of the fourth relay KM4 are connected in sequence and then connected with the third relay KM3 in parallel, and the first normally open contact KM3-2, the fourth relay KM4, the first normally open contact KM4-1, the third travel switch SP3, the indicator lamp U1 and the sounder U2 of the third relay KM3 form an alarm circuit.

The positive pole of the first power supply DC1, the pull-up resistor R1, the second normally open contact KM3-3 of the third relay KM3 and the negative pole of the first power supply DC1 are sequentially connected, the connection point of the pull-up resistor R1 and the third relay KM3 is connected with the P0.0 end of the controller U4 and communicated, the identifier U3 is connected with the third relay KM3 in parallel, the identifier U3 is connected with the controller U4 and communicated, and the controller U4 is connected with the communication device U5 and communicated.

The sound generator U2 is a loudspeaker, the controller U4 is a singlechip, the identifier U3 is a read-write device, and the read-write device is electrically connected and communicated with the first interface J1.

The isolating switch body, the first power supply DC1, the opening button AN-1, the closing button AN-2, the first to third travel switches SP1 to SP3, the first to fourth relays KM1 to KM4, the switch K0, the lock, the indicator lamp U1, the loudspeaker, the singlechip, the communication device U5, the first interface J1, the read-write device and the corresponding communication connection technology are not repeated in the prior art.

Description of example 2 use:

the power supply device comprises a grounding wire, wherein a second power supply DC2, a second interface J2, a photovoltaic charging unit and an identification unit with a grounding wire identification code are arranged on the grounding wire, the second power supply DC2, the second interface J2, the photovoltaic charging unit and the identification unit are all located on the grounding wire, the second power supply DC2 is electrically connected with the second interface J2 to form a ground wire side power supply circuit, and the photovoltaic charging unit is connected with the second power supply DC2 in series.

The identification unit is a memory, the memory is electrically connected and communicated with the second interface J2, the read-write device is electrically connected and communicated with the memory through the communicated interface,

the second power supply DC2, the second interface J2, the ground line, the photovoltaic charging unit, the memory, and the corresponding communication connection technology are not described in detail herein for the prior art.

3. The second interface J2 is connected to the first interface J1, the coil of the third relay KM3 is powered on, the normally open contact KM3-3 of the third relay KM3 is closed, a signal circuit is conducted, a signal connected with a grounding wire is transmitted to the controller U4, the reading and writing device reads the grounding wire identification code from the memory and informs the controller U4, the communication device U5 has a positioning function, and the controller U4 informs the monitoring station of the grounding wire identification code and the grounding wire connected position through the communication device U5 so as to further manage and use.

The first disconnecting switch G1, the first circuit breaker DL1 and the second disconnecting switch G2 are sequentially connected, and the third disconnecting switch G3, the second circuit breaker DL2 and the fourth disconnecting switch G4 are sequentially connected. When the circuit has maintenance work, the second isolating switch G2 needs maintenance, and the grounding disconnecting switch D2 cannot be closed at the moment, so that a temporary grounding wire needs to be hung on the grounding disconnecting switch D2 side of the second isolating switch G2. The second isolating switch G2 has a mechanical locking relation with the grounding switch D2, and the second isolating switch G2 cannot be closed under the condition that the grounding switch D2 is closed. This part is the prior art and will not be described in detail.

The technical contribution of the present application:

the isolating switch is better in use safety through the isolating switch body, the first power supply DC1, the third relay KM3, the first normally-closed contact KM3-1 of the third relay KM3, the first interface J1 and the like. The disconnecting switch can timely find the access of the grounding wire, realize the real-time monitoring of the installation and the dismantling of the grounding wire, and prevent the closing of the grounding wire caused by the untimely dismantling of the temporary grounding wire.

After the application runs for a period of time in a secret way, the feedback of field technicians is beneficial in that:

1. when the ground wire is in an installation state, the closing operation cannot be performed.

2. When the main knife is required to be separated and combined during maintenance work, an emergency unlocking device can be adopted to unlock the auxiliary contact to perform closing operation. And starting audible and visual alarm to remind related personnel that the ground wire is not removed.

3. When the switch-off button is pressed, the audible and visual alarm circuit is disconnected, and the audible and visual alarm circuit stops working.

4. When the ground wire is dismantled after the work is finished, the device is finished in work, and the ground wire installation information disappears, namely the ground wire is dismantled.

Claims

1. The utility model provides an isolator, includes isolator body and switching circuit, switching circuit is including being located the first power DC1 and the switching-on circuit of isolator body side series connection, its characterized in that: the three-phase isolating switch further comprises a third relay KM3 positioned on the side of the isolating switch body, a first normally-closed contact KM3-1 of the third relay KM3 and a first interface J1, wherein the first interface J1 is electrically connected with the third relay KM3 to form a ground wire monitoring circuit, and the first normally-closed contact KM3-1 of the third relay KM3 is connected into a closing circuit in series; the automatic switching device further comprises a first normally open contact KM3-2, a fourth relay KM4 and a first normally open contact KM4-1 of the fourth relay KM4, a third travel switch SP3 and an alarm device, wherein the first normally open contact KM3-2, the third travel switch SP3, the fourth relay KM4 and the first power supply DC1 of the third relay KM3 are connected in series, the first normally open contact KM4-1 of the fourth relay KM4 is connected in parallel with the third relay KM3 after being connected in series with the alarm device, and the first normally open contact KM3-2, the fourth relay KM4 and the first normally open contact KM4-1 of the fourth relay KM4, the third travel switch SP3 and the alarm device of the third relay KM3 form an alarm circuit; the alarm device comprises an indicator lamp U1 and a sounder U2, wherein a first normally open contact KM4-1 of a fourth relay KM4, the indicator lamp U1 and the sounder U2 are connected in series and then connected with a third relay KM3 in parallel; the device comprises a first interface J1, a second normally open contact KM3-3 of a third relay KM3, a recognizer U3, a controller U4 and a communication device U5, wherein the recognizer U3 is positioned at the first interface J1 and is used for acquiring an identification code of a grounding wire, the second normally open contact KM3-3 of the third relay KM3 is connected with the controller U4 and is communicated with the controller U4, the recognizer U3 is connected with the third relay KM3 in parallel, the recognizer U3 is connected with an identification unit and is communicated with the controller U4, and the controller U4 is connected with the communication device U5 and is communicated with the communication device U5; the power supply further comprises a pull-up resistor R1, wherein the positive electrode of the first power supply DC1, the pull-up resistor R1, the second normally open contact KM3-3 of the third relay KM3 and the negative electrode of the first power supply DC1 are sequentially connected, and the connection point of the pull-up resistor R1 and the third relay KM3 is connected with the control end of the controller U4; the device further comprises a switch K0 and a lockset for locking the switch K0, wherein the switch K0 is connected with a first normally-closed contact KM3-1 of a third relay KM3 in parallel; the switch circuit further comprises a brake separating button AN-1, a brake closing button AN-2, a first relay KM1 for controlling the brake separating of the isolating switch body, a first normally closed contact KM1-1 and a first normally open contact KM1-2 of the first relay KM1, a second relay KM2 for controlling the brake closing of the isolating switch body, a first normally closed contact KM2-1 and a first normally open contact KM2-2 of the second relay KM2, a first travel switch SP1 for knowing that the brake is closed and opened and a second travel switch SP2 for knowing that the brake separating is closed and opened, wherein the brake separating button AN-1, the first relay KM1, the first normally open contact KM1-2 of the first relay KM1, the first normally closed contact KM2-1 and the second travel switch SP2 of the first relay KM2 are combined into a brake circuit, and the brake separating button AN-1, the first normally closed contact KM2-1 of the second relay KM2, the first relay KM1 and the second travel switch SP2 are connected in series, and the first relay AN 1-2 of the brake separating button AN 1 is connected in parallel with the brake separating button AN 1; the switching-on button AN-2, the second relay KM2, a first normally-open contact KM2-2 of the second relay KM2, a first normally-closed contact KM1-1 of the first relay KM1 and a first travel switch SP1 form a switching-on circuit, the switching-on button AN-2, the first normally-closed contact KM1-1 of the first relay KM1, the second relay KM2 and the first travel switch SP1 are connected in series, and the first normally-open contact KM2-2 of the second relay KM2 is connected in parallel with the switching-on button AN-2; the switching-off circuit is connected in parallel with the switching-on circuit and then connected in series with the first power supply DC 1.

2. An isolating switch as in claim 1, wherein: the sound generator U2 is a loudspeaker or a buzzer.

3. An isolating switch as in claim 1, wherein: the controller U4 is a singlechip.

4. An isolating switch as in claim 1, wherein: the identifier U3 is an RFID identifier, or the identifier U3 is a read-write device, and the read-write device is electrically connected and communicates with the first interface J1.