CN113745038A

CN113745038A - Isolating switch

Info

Publication number: CN113745038A
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: 2021-12-03
Anticipated expiration: 2041-08-31
Also published as: CN113745038B

Abstract

The invention discloses an isolating switch, and relates to the technical field of power equipment; the switch circuit comprises a disconnecting switch body and a switch circuit, wherein the switch circuit comprises a first power supply DC1 and a switch-on circuit which are serially connected and are positioned on the side of the disconnecting switch body, and further comprises a third relay KM3 and a first normally closed contact KM3-1 and a first interface J1 of a third relay KM3 which are positioned on the side of the disconnecting switch body, 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 serially connected into the switch-on circuit; the isolation switch is better in use safety through the isolation 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

Isolating 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 frequently required to be disassembled and assembled, and the temporary grounding wire is not timely disassembled, so that a vicious event of closing a switch with the grounding wire can be caused. The isolating switch cannot monitor the ground wire in real time and cannot ensure whether the ground wire is correctly connected or disconnected.

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

Problems with the prior art and considerations:

how to solve the relatively poor technical problem of isolator security.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an 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 a third relay KM3, a first interface J1 and the like.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides an isolator includes isolator body and switch circuit, switch circuit is including being located the first power DC1 and the combined floodgate circuit of isolator body side series connection, still including being located the first normally closed contact KM3-1 and the first interface J1 of third relay KM3, third relay KM3 of isolator body side, first interface J1 is connected with third relay KM3 electricity and is formed ground wire monitoring circuit, the first normally closed contact KM3-1 of third relay KM3 is established ties in the combined floodgate circuit.

The further technical scheme is as follows: the first normally open contact KM3-2, the fourth relay KM4 and the first normally open contact KM4-1 of a third relay KM3, a third travel switch SP3 used for knowing that the switch-on is in place and is closed and an alarm device are also arranged on the side of the isolating switch body, the first normally open contact KM3-2, the third travel switch SP3 and the fourth relay KM4 of the third relay KM3 are connected in series with a first power supply DC1, 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 686KM 8-2, 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 form an alarm circuit.

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

The further technical scheme is as follows: the sounder U2 is a horn or a buzzer.

The further technical scheme is as follows: the ground wire identification device further comprises a second normally open contact KM3-3 of a third relay KM3, an identifier U3, a controller U4 and a communication device U5, wherein the identifier U3, the controller U4 and the communication device U5 are located on the first interface J1 side and used for acquiring the identification code of the ground wire, the second normally open contact KM3-3 of the third relay KM3 is connected with and communicated with the controller U4, the identifier U3 is connected with the third relay KM3 in parallel, the identifier U3 is connected with and communicated with the identification unit, the identifier U3 is connected with and communicated with the controller U4, and the controller U4 is connected with and communicated with the communication device U5.

The further technical scheme is as follows: the pull-up circuit further comprises a pull-up resistor R1, the positive electrode of the first power supply DC1, the pull-up resistor R1, a 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 scheme is as follows: the controller U4 is a single chip microcomputer.

The further technical scheme is as follows: the recognizer U3 is an RFID recognizer, or the recognizer U3 is a read-write device, and the read-write device is electrically connected with and communicates with the first interface J1.

The further technical scheme is as follows: the switch K0 and a lock for locking the switch K0 are further included, and the switch K0 is connected in parallel with the first normally closed contact KM3-1 of the third relay KM 3.

The further technical scheme is as follows: the switch circuit also comprises a switching-off button AN-1, a switching-on button AN-2, a first relay KM1 for controlling the switching-off 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 switching-on 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 switching-on is in place and being disconnected and a second travel switch SP2 for knowing that the switching-off is in place and being disconnected, wherein the switching-off 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 second relay KM2 form the switching-off circuit, and the switching-off button AN-1, the first normally closed contact KM2-1 and the first normally closed contact KM2-1 of the second relay KM2 form the switching-off circuit, The first relay KM1 is connected with the second travel switch SP2 in series, and a first normally open contact KM1-2 of the first relay KM1 is connected with the opening button AN-1 in parallel; the switching-on circuit comprises a switching-on button AN-2, a second relay KM2, a first normally open contact KM2-2 of a second relay KM2, a first normally closed contact KM1-1 of a first relay KM1 and a first travel switch SP1, wherein 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 with the switching-on button AN-2 in parallel; the switching-off circuit and the switching-on circuit are connected in parallel and then are connected in series with a first power supply DC 1.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

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

Secondly, the emergency protective switch further comprises a first normally open contact KM3-2 of a third relay KM3, a fourth relay KM4, a first normally open contact KM4-1 of a fourth relay KM4, a third stroke switch SP3 for knowing that the switch-on is in place and closed and an alarm device, wherein the first normally open contact KM3-2, the third stroke switch SP3, the fourth relay KM4 of the third relay KM3 are connected in series with a first power supply DC1, 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 of the third relay KM3, the first normally open contact KM4-1 of the fourth relay KM4, the third stroke switch SP3 and the alarm device form an alarm circuit. According to the technical scheme, the alarm prompt is realized, and the use is more convenient.

Thirdly, the alarm device comprises an indicator light U1 and a sounder U2, and a first normally open contact KM4-1, an indicator light U1 and a sounder U2 of a fourth relay KM4 are connected in series and then connected with a third relay KM3 in parallel. According to the technical scheme, the sound and light alarm is achieved, and the using effect is better.

And fourthly, the system also comprises a second normally open contact KM3-3 of a third relay KM3, an identifier U3, a controller U4 and a communication device U5, wherein the identifier U3, the controller U4 and the communication device U5 are positioned on the first interface J1 side and are used for acquiring the identification code of the grounding wire, the second normally open contact KM3-3 of the third relay KM3 is connected with and communicates with the controller U4, the identifier U3 is connected with the third relay KM3 in parallel, the identifier U3 is connected with and communicates with the identification unit, the identifier U3 is connected with and communicates with the controller U4, and the controller U4 is connected with and communicates with the communication device U5. This technical scheme can know which specific earth connection does not demolish, and it is more convenient to use.

Fifthly, the multifunctional door lock further comprises a switch K0 and a lock for locking the switch K0, wherein the switch K0 is connected in parallel with the first normally closed contact KM3-1 of the third relay KM 3. This technical scheme uses when being convenient for overhaul the debugging, and is more nimble convenient.

See detailed description of the preferred embodiments.

Drawings

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

FIG. 2 is a functional 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 technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

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 than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited to the specific embodiments disclosed below.

Example 1:

as shown in figure 1, the invention discloses AN isolating switch which comprises AN isolating switch body, a first power supply DC1, a breaking button AN-1, a closing button AN-2, a first travel switch SP1 for knowing that the isolating switch is in place and broken, a second travel switch SP2 for knowing that the separating switch is in place and broken, a third travel switch SP3 for knowing that the closing switch is in place and closed, a first relay KM1 for controlling the opening of the isolating switch body, a first normally closed contact KM1-1 and a first normally open contact KM1-2 of a first relay KM1, a second relay KM2 for controlling the closing of the isolating switch body, a first normally closed contact KM2-1 and a first normally open contact KM2-2 of a second relay KM2, a third relay KM3, a first normally closed contact KM3-1, a first normally open contact KM3-2 and a second normally open contact KM3-3 of a third relay KM3, A fourth relay KM4, a first normally open contact KM4-1 of the fourth relay KM4, a switch K0, a lockset for locking the switch K0, an indicator lamp U1, a sounder U2, a pull-up resistor R1, a controller U4, a communication device U5, a first interface J1 and a recognizer U3 positioned at the side of the first interface J1 and used for acquiring an identification code of a grounding wire in an identification unit, 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, a lock, AN indicator light U1, a sounder U2, a pull-up resistor R1, a controller U4 and a communication device U5 are all positioned near the isolating switch body, the first interface J1 is located near the grounding point, and the identifier U3 is located near the first interface J1.

As shown in fig. 1, the switching-off 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 form a switching-off circuit, the switching-off 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 switching-off button AN-1.

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

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

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

As shown in fig. 1, the first normally open contact KM3-2, the third stroke 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, the indicator light 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 of the fourth relay KM4, the third stroke switch SP3, the indicator light U1 and the sounder U2 of the third relay KM3 form an alarm circuit.

As shown in fig. 1, the positive electrode of the first power source 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 source DC1 are connected in sequence, 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 communicates, the identifier U3 is connected with the third relay KM3 in parallel, the identifier U3 is connected with and communicates with the controller U4, and the controller U4 is connected with and communicates with the communication device U5.

The sounder U2 is a buzzer, the controller U4 is a single chip microcomputer, 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 stroke switches SP 1-SP 3, the first to fourth relays KM 1-KM 4, the switch K0, a lock, AN indicator lamp U1, a buzzer, a single chip microcomputer, a communication device U5, a first interface J1, the RFID identifier and corresponding communication connection technologies are not described in detail in the prior art.

Example 1 description of use:

as shown in fig. 2, a second power supply DC2, a second interface J2, a photovoltaic charging unit and an identification unit with an identification code of a ground wire are installed on the ground wire by using 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 fit with the first interface J1, and the second power supply DC2 is connected with or disconnected from the third relay KM3 in series.

The identification unit is an RFID label, and the RFID recognizer is in wireless connection and communication with the RFID label.

The second power supply DC2, the second interface J2, the ground line, the photovoltaic charging unit, the RFID tag itself, and corresponding communication connection technologies are not described herein in detail 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 switching-on circuit of the second isolating switch G2 cannot work, and safety is ensured.

2.1, when the second isolating switch G2 needs to be repaired, the isolating switch needs to be closed. Before the isolating switch needs to be switched on, the isolating switch is in AN opening state at the moment, SP2 is switched off, a coil of a first relay KM1 is free of electricity, a first normally closed contact KM1-1 of the first relay KM1 is closed, AN unlocking switch K0 is used for enabling a switch K0 to be closed, a closing button AN-2 is pressed to enable a closing circuit to be switched on, a coil of a second relay KM2 is electrified, a normally open contact KM2-2 of the second relay KM2 is closed to keep the motor running, after the closing is in place, a travel switch SP1 is switched off, the coil of the second relay KM2 is electrified, and the normally open contact KM2-2 of the second relay KM2 is switched off. At the moment, the third travel switch SP3 is closed, so that the coil of the fourth relay KM4 is electrified, the normally open contact KM4-1 of the fourth relay KM4 is closed, the alarm circuit is conducted, and the alarm device gives out sound-light alarm to prompt field personnel to have ground wire access.

2.2, when the second isolating switch G2 is switched off, the switching-off 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 switching-off 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 switching-off self-holding circuit is conducted, and the motor is kept to operate. And when the opening is in place, the third stroke switch SP3 is switched 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, a coil of the third relay KM3 is electrified, a normally open contact KM3-3 of the third relay KM3 is closed, a signal circuit is conducted, a signal of connecting a ground wire is transmitted to the controller U4, the RFID identifier wirelessly reads the identification code of the ground wire from the RFID tag and informs the controller U4 of the identification code of the ground wire, the communication device U5 has a positioning function, and the controller U4 informs the monitoring station of the identification code of the ground wire and the connecting position of the ground wire through the communication device U5 so as to further manage and use.

4. The second disconnector G2 is disabled from closing during normal condition servicing.

5. When the second disconnecting switch G2 needs to be overhauled, since the own grounding switch D2 has a mechanical locking relationship with the disconnecting switch thereof, and the grounding switch D2 cannot be switched on and off when being switched on, the own grounding switch needs to be switched off, 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 sound and light alarm.

As shown in fig. 3, a first disconnector G1, a first breaker DL1 and a second disconnector G2 are connected in sequence, and a third disconnector G3, a second breaker DL2 and a fourth disconnector G4 are connected in sequence. When the line has a maintenance work, the second isolating switch G2 needs to be maintained, and the grounding disconnecting link D2 cannot be closed at the moment, so a temporary grounding line needs to be hung on the grounding disconnecting link D2 of the second isolating switch G2. The second disconnector G2 is mechanically locked to the grounding switch D2, and when the grounding switch D2 is closed, the second disconnector G2 cannot be closed. This part is not described in detail in the prior art.

Example 2:

the difference between the embodiment 2 and the embodiment 1 is that the sound generator U2 is a horn, the identification unit is a memory, the recognizer U3 is a read-write device, the memory is electrically connected with the second interface J2 and communicates with the memory, the read-write device is electrically connected with the first interface J1 and communicates with the memory through the communicated interface.

The invention discloses AN isolating switch which comprises AN isolating switch body, a first power supply DC1, a breaking button AN-1, a closing button AN-2, a first travel switch SP1, a second travel switch SP2, a third travel switch SP3, a first relay KM1, a first normally closed contact KM1-1 and a first normally open contact KM1-2 of a first relay KM1, a second relay KM2, a first normally closed contact KM2-1 and a first normally open contact KM2-2 of a second relay KM2, a first normally closed contact KM2-1 and a first normally open contact KM2-2 of a third relay KM3, a first normally closed contact KM3-1 of a third relay KM3, a first normally open contact KM3-2 and a second normally open contact KM3-3 of the isolating switch body, wherein the first power supply DC1, the breaking button AN-1, the closing button AN-2, the first travel switch SP1 and the breaking switch are positioned on the side of the isolating switch body, A fourth relay KM4, a first normally open contact KM4-1 of the fourth relay KM4, a switch K0, a lockset for locking the switch K0, an indicator lamp U1, a sounder U2, a pull-up resistor R1, a controller U4, a communication device U5, a first interface J1 and a recognizer U3 positioned at the side of the first interface J1 and used for acquiring an identification code of a grounding wire in an identification unit, 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, a lock, AN indicator light U1, a sounder U2, a pull-up resistor R1, a controller U4 and a communication device U5 are all positioned near the isolating switch body, the first interface J1 is located near the grounding point, and the identifier U3 is located near the first interface J1.

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

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

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

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, 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 communicates, the identifier U3 is connected with the third relay KM3 in parallel, the identifier U3 is connected with and communicates with the controller U4, and the controller U4 is connected with and communicates with the communication device U5.

The sounder U2 is a horn, the controller U4 is a single chip microcomputer, the recognizer U3 is a read-write device, and the read-write device is electrically connected with and communicates 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 stroke switches SP 1-SP 3, the first to fourth relays KM 1-KM 4, the switch K0, a lock, AN indicator lamp U1, a loudspeaker, a single chip microcomputer, a communication device U5, the first interface J1, the reading-writing device and corresponding communication connection technologies are not described in detail herein for the prior art.

Example 2 description of use:

the ground wire is used, a second power supply DC2, a second interface J2, a photovoltaic charging unit and an identification unit with a 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 identification unit is a memory which is electrically connected with and communicated with the second interface J2, the read-write device is electrically connected with 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 itself, and corresponding communication connection technologies are not described herein in detail for the prior art.

3. The second interface J2 is connected to the first interface J1, a coil of the third relay KM3 is powered on, a normally open contact KM3-3 of the third relay KM3 is closed, a signal circuit is conducted, a signal of connecting the ground wire is transmitted to the controller U4, the read-write device reads the identification code of the ground wire from the memory and informs the controller U4 of the identification code of the ground wire, the communication device U5 has a positioning function, and the controller U4 informs the monitoring station of the connection position of the ground wire and the ground wire through the communication device U5 so as to be further managed and used.

The first disconnector G1, the first breaker DL1 and the second disconnector G2 are connected in sequence, and the third disconnector G3, the second breaker DL2 and the fourth disconnector G4 are connected in sequence. When the line has a maintenance work, the second isolating switch G2 needs to be maintained, and the grounding disconnecting link D2 cannot be closed at the moment, so a temporary grounding line needs to be hung on the grounding disconnecting link D2 of the second isolating switch G2. The second disconnector G2 is mechanically locked to the grounding switch D2, and when the grounding switch D2 is closed, the second disconnector G2 cannot be closed. This part is not described in detail in the prior art.

Technical contribution of the present application:

the isolation switch is better in use safety through the isolation 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. By the isolating switch, the access of the grounding wire can be found in time, the real-time monitoring of the installation and the removal of the grounding wire is realized, and the switching-on with the grounding wire caused by the untimely removal of the temporary grounding wire is prevented.

After the application runs secretly for a period of time, the feedback of field technicians has the advantages that:

1. and the ground wire is ensured to be incapable of switching on when in an installation state.

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

3. When the opening button is pressed, the sound-light alarm circuit is disconnected, and the sound-light alarm circuit stops working.

4. When the ground wire is removed after the work is finished, the work of the device is finished, the installation information of the ground wire disappears, and the ground wire is removed.

Claims

1. A disconnecting switch comprises a disconnecting switch body and a switching circuit, wherein the switching circuit comprises a first power supply DC1 and a closing circuit which are serially connected at the side of the disconnecting switch body, and the disconnecting switch is characterized in that: the isolating switch further comprises a third relay KM3 positioned on the side of the isolating switch body, a first normally closed contact KM3-1 and a first interface J1 of the third relay KM3, 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 in series with a closing circuit.

2. A disconnector according to claim 1, characterized in that: the first normally open contact KM3-2, the fourth relay KM4 and the first normally open contact KM4-1 of a third relay KM3, a third travel switch SP3 used for knowing that the switch-on is in place and is closed and an alarm device are also arranged on the side of the isolating switch body, the first normally open contact KM3-2, the third travel switch SP3 and the fourth relay KM4 of the third relay KM3 are connected in series with a first power supply DC1, 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 686KM 8-2, 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 form an alarm circuit.

3. A disconnector according to claim 2, characterized in that: the alarm device comprises an indicator light U1 and a sounder U2, wherein a first normally open contact KM4-1, an indicator light U1 and a sounder U2 of a fourth relay KM4 are connected in series and then connected with a third relay KM3 in parallel.

4. A disconnector according to claim 3, characterized in that: the sounder U2 is a horn or a buzzer.

5. A disconnector according to claim 1, characterized in that: the ground wire identification device further comprises a second normally open contact KM3-3 of a third relay KM3, an identifier U3, a controller U4 and a communication device U5, wherein the identifier U3, the controller U4 and the communication device U5 are located on the first interface J1 side and used for acquiring the identification code of the ground wire, the second normally open contact KM3-3 of the third relay KM3 is connected with and communicated with the controller U4, the identifier U3 is connected with the third relay KM3 in parallel, the identifier U3 is connected with and communicated with the identification unit, the identifier U3 is connected with and communicated with the controller U4, and the controller U4 is connected with and communicated with the communication device U5.

6. A disconnector according to claim 5, characterized in that: the pull-up circuit further comprises a pull-up resistor R1, the positive electrode of the first power supply DC1, the pull-up resistor R1, a 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.

7. A disconnector according to claim 5, characterized in that: the controller U4 is a single chip microcomputer.

8. A disconnector according to claim 5, characterized in that: the recognizer U3 is an RFID recognizer, or the recognizer U3 is a read-write device, and the read-write device is electrically connected with and communicates with the first interface J1.

9. A disconnector according to claim 1, characterized in that: the switch K0 and a lock for locking the switch K0 are further included, and the switch K0 is connected in parallel with the first normally closed contact KM3-1 of the third relay KM 3.

10. A disconnector according to claim 1, characterized in that: the switch circuit also comprises a switching-off button AN-1, a switching-on button AN-2, a first relay KM1 for controlling the switching-off 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 switching-on 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 switching-on is in place and being disconnected and a second travel switch SP2 for knowing that the switching-off is in place and being disconnected, wherein the switching-off 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 second relay KM2 form the switching-off circuit, and the switching-off button AN-1, the first normally closed contact KM2-1 and the first normally closed contact KM2-1 of the second relay KM2 form the switching-off circuit, The first relay KM1 is connected with the second travel switch SP2 in series, and a first normally open contact KM1-2 of the first relay KM1 is connected with the opening button AN-1 in parallel; the switching-on circuit comprises a switching-on button AN-2, a second relay KM2, a first normally open contact KM2-2 of a second relay KM2, a first normally closed contact KM1-1 of a first relay KM1 and a first travel switch SP1, wherein 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 with the switching-on button AN-2 in parallel; the switching-off circuit and the switching-on circuit are connected in parallel and then are connected in series with a first power supply DC 1.