CN115755686A - Logic operation device and use method thereof - Google Patents

Abstract

The invention discloses a logic operation device and a using method thereof, comprising a device housing and a power interface located on the device housing, a switch, a first interface, a second interface, a third interface and a fourth interface; the first interface There is a first contact pair used to connect to the normally open contacts of the first section bus disconnector, the second interface is provided with a second contact pair used to connect to the normally open contacts of the second bus disconnect switch, and the third interface The third contact pair and the fourth contact pair are provided for connecting to the normally open contacts of the line side isolating switch, and the third interface is provided with the fifth contact pair for connecting to the normally open contacts of the circuit breaker. Between each contact pair The connections form logic control lines. The present invention forms the operation logic suitable for the operation of the mother-inverting operation through the connection relationship between the contact pair, the changeover switch and various controllers. When the mother-inverting operation is performed according to the formed operation logic, the misoperation of the mother-inverting can be reliably avoided, so that Working with electricity is safer.

Description

A kind of logical operation device and using method thereof

technical field

The invention relates to the technical field of power system switching operation, in particular to a logic operation device and a use method thereof.

Background technique

In the power system, as shown in Figure 1, the double-bus connection mode is particularly common. According to the "State Grid Corporation of China Electric Power Safety Work Regulations", "power failure switching operations should be carried out in sequence in the order of circuit breaker (switch) - load side isolating switch (knife switch) - power supply side isolating switch (knife switch)". The mother-inverting operation is an operation logic based on equipotentiality, and follows the operation logic of "combining first and then separating". The operation logic error of the mother-inverting operation will lead to serious accidents such as pulling the knife switch with load.

In order to prevent misoperation logic, the existing technical solution mainly uses the microcomputer anti-misoperation system to make logical judgments based on the position status of the equipment (isolating switch) collected by it, and generate operation steps that meet the requirements of the operation logic. At the same time, there are remote control locking relays in the field terminal box, which are connected to the isolation switch control circuit to achieve locking.

However, this method is judged by software logic (called soft lock), which will lose the anti-mislock when the microcomputer anti-misoperation system fails, especially in emergency situations, and it is easy to cause misoperation. operate. Moreover, the remote control locking relay is also easy to be directly artificially shorted by means of short wiring, which is easy to make mistakes and cause misoperations in emergency situations.

Contents of the invention

The technical problem to be solved by the present invention is: to provide a logic operation device and its use method, which can reliably avoid the misoperation of the inverter and make the electric work safer.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A logic operation device, comprising a device housing and a power interface located on the device housing, a switch, a first interface, a second interface, a third interface and a fourth interface;

The first interface is provided with a first contact pair for connecting to the normally open contact of the first section of the bus isolating switch, and the second interface is provided with a first contact pair for connecting to the normally open contact of the second section of the bus isolating switch. Two contact pairs, the third interface is provided with a third contact pair and a fourth contact pair for accessing the normally open contact of the line side isolating switch, and the fourth interface is provided with a normally open contact for accessing the circuit breaker The fifth contact pair of

The common end of the switch is connected to the power interface, the first tangent end of the switch is connected to one end of the fifth contact pair, and the other end of the fifth contact pair is simultaneously connected to the first One end of the contact pair is connected to one end of the second contact pair, the other end of the first contact pair is connected to one end of the third contact pair, and the other end of the second contact pair is connected to the fourth contact pair. Connected at one end of the pair;

The other end of the third pair of contacts and the other end of the fourth pair of contacts are respectively used to connect the controller of the first-section bus disconnector and the controller of the second-section bus disconnector.

In order to solve the above-mentioned technical problems, another kind of technical scheme that the present invention adopts is:

A method for using a logic operation device, applied to the above-mentioned logic operation device, comprising the following steps:

S1. On the power supply interface, the first interface, the second interface, the third interface and the fourth interface, the corresponding power supply, the normally open contact of the first section of the bus isolating switch, and the normally open contact of the second section of the bus isolating switch , The normally open contact of the line side isolating switch and the normally open contact of the circuit breaker;

S2. When performing bus-inverting operation from the operation of the first section of the bus to the operation of the second section of the bus, control the switch to the first cut-off end, so that the controller of the second section of the bus isolating switch is charged;

S3. Control the closing of the second-section bus isolating switch, so that the second contact pair is connected, and the controller of the first-section bus isolating switch is electrified, and completes the bus inverting operation.

The beneficial effects of the present invention are: to provide a logical operation device and its use method, in which an interface with a pair of contacts is provided on the housing of the device, which are respectively used to connect to the double bus of the power system such as the isolating switch of the first section of the bus For electronic components such as normally open contacts, through the connection relationship between contact pairs, switches and various controllers, the operation logic suitable for the operation of the mother-inverting operation is formed. When the mother-inverting operation is performed according to the formed operation logic, it can be reliably avoided. Misoperation of the inverted mother makes the electric work safer.

Description of drawings

Fig. 1 is the double-bus wiring diagram of existing power system;

FIG. 2 is a schematic structural diagram of a logical operation device according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of the internal wiring of a logical operation device according to an embodiment of the present invention;

Fig. 4 is an equivalent wiring diagram of the control principle of a logic operation device involved in an embodiment of the present invention;

FIG. 5 is a schematic diagram of steps of a method for using a logic operation device according to an embodiment of the present invention.

Label description:

1. Device body; 2. Protective cover; 3. Padlock;

DL, circuit breaker;

G1, the first section of the bus isolating switch; G2, the second section of the bus isolating switch; G3, the line side isolating switch;

J1, the controller of the first-section bus disconnector; J2, the controller of the second-section bus disconnector; J3, the disconnector of the line side;

K1, toggle switch;

M1, the first busbar; M2, the second busbar;

P1, the first interface; P2, the second interface; P3, the third interface; P4, the fourth interface; P5, the power interface;

X1, the first contact pair; X2, the second contact pair; X3, the third contact pair; X4, the fourth contact pair; X5, the fifth contact pair; X6, the sixth contact pair; X7, the seventh contact pair; X8 , the eighth contact pair; X9, the ninth contact pair; X10, the tenth contact pair; X11, the eleventh contact pair; X12, the twelfth contact pair.

Detailed ways

In order to describe the technical content, achieved goals and effects of the present invention in detail, the following descriptions will be made in conjunction with the embodiments and accompanying drawings.

Please refer to FIG. 2 and FIG. 3 , a logic operation device includes a device housing 1 and a power interface P5 located on the device housing 1, a switch K1, a first interface P1, a second interface P2, and a third interface P3 and the fourth interface P4;

The first interface P1 is provided with a first contact pair X1 for connecting to the normally open contact of the first section of the bus isolating switch G1, and the second interface P2 is provided with a normally open contact for connecting to the second section of the bus isolating switch G2. The second contact pair X2 of the open contact, the third interface P3 is provided with a third contact pair X3 and a fourth contact pair X4 for connecting to the normally open contact of the line side isolating switch G3, the fourth interface P4 There is a fifth contact pair X5 for connecting to the normally open contact of the circuit breaker DL;

The common end of the switch K1 is connected to the power interface P5, the first tangent end of the switch K1 is connected to one end of the fifth contact pair X5, and the other end of the fifth contact pair X5 is simultaneously One end of the first contact pair X1 is connected to one end of the second contact pair X2, the other end of the first contact pair X1 is connected to one end of the third contact pair X3, and the second contact pair The other end of X2 is connected to one end of the fourth contact pair X4;

The other end of the third pair of contacts X3 and the other end of the fourth pair of contacts X4 are respectively used to connect the controller J1 of the first-section bus disconnector and the controller J2 of the second-section bus disconnector.

As can be seen from the above description, the beneficial effect of the present invention is that an interface with a pair of contacts is provided on the device housing 1, which are respectively used to connect the normally open contacts on the double bus of the power system such as the first section of the bus isolating switch G1 and other electronic components, through the connection relationship between the contact pair, switch K1 and various controllers, the operation logic suitable for the mother-inverting operation is formed. When the mother-inverting operation is performed according to the formed operation logic, it can reliably avoid the mother-inverting operation. Misoperation occurs, making electrical work safer.

Further, the first interface P1 is also provided with a sixth contact pair X6 and a seventh contact pair X7 for connecting to the normally open contact and the normally closed contact of the first section of the bus disconnector G1, and the second interface P2 is also provided with the eighth contact and the ninth contact pair X9 for connecting the normally open contact and the normally closed contact of the second-section bus isolating switch G2, and the third interface P3 is also provided for connecting to the line side isolation The tenth contact pair X10 and the eleventh contact pair X11 of the normally closed contact of the switch G3, the fourth interface P4 is provided with a twelfth contact pair X12 for connecting to the normally closed contact of the circuit breaker DL;

The second tangent end of the changeover switch K1 is connected to one end of the twelfth contact pair X12, and the other end of the twelfth contact pair X12 is simultaneously connected to one end of the seventh contact pair X7, the ninth One end of the contact pair X9, one end of the tenth contact pair X10 and one end of the eleventh contact pair X11 are connected, the other end of the seventh contact pair X7 is connected to one end of the eighth contact pair X8, and the The other end of the ninth contact pair X9 is connected to one end of the sixth contact pair X6;

The other end of the sixth contact pair X6 and the other end of the eighth contact pair X8 are both used to connect the line side isolating switch controller J3, and the other end of the tenth contact pair X10 is connected to the eleventh contact pair X11 The other end of each is used to connect the controller J1 of the bus disconnector of the first section and the controller J2 of the disconnector of the bus disconnector of the second section respectively.

As can be seen from the above description, by setting more contact pairs and connection relationships to form the wiring logic for shutdown and recommissioning, the shutdown and recommissioning operations must be performed in the correct order to achieve the expected results, which can effectively prevent misoperations from occurring, and through The changeover switch K1 is used to switch over the busbar and stop and resume service, which is flexible and convenient to use.

Further, the changeover switch K1 also has a third line-cutting terminal, and the third line-cutting terminal is simultaneously connected to the controller J1 of the bus disconnector switch of the first section, the controller J2 of the busbar disconnector switch of the second section and the line Side isolation switch controller J3.

It can be seen from the above description that the transfer switch K1 also has a third line-cutting terminal, which is used to simultaneously charge the controller J1 of the first-section bus disconnector, the controller J2 of the second-section bus disconnector, and the controller J3 of the line-side disconnector J3, so that The busbar operation control is completely separated from the logic limit of the device, so as to facilitate the maintenance work on the isolating switch and so on.

Further, it also includes a protective cover 2 and a padlock 3;

The protective cover 2 is arranged on the device housing 1 and covers the switch K1;

The padlock 3 is arranged on the protective cover 2 .

It can be seen from the above description that a protective cover 2 and a padlock 3 are provided on the switch K1 to ensure that the switch K1 will not be misoperated by others and ensure the safety of the device.

Further, the first interface P1 is provided with a first pin and a second pin, and the length of the first pin is greater than the length of the second pin;

The two first contact pins and the two second contact pins form the first contact pair X1 and the seventh contact pair X7 respectively.

It can be seen from the above description that the fool-proof design of wiring is formed by setting the first pin and the second pin with different lengths, so as to ensure that the wiring is less prone to mistakes and improve the wiring efficiency.

Please refer to FIG. 3 to FIG. 5 , a method for using a logic operation device, which is applied to the above-mentioned logic operation device, is characterized in that it includes the following steps:

S1. On the power supply interface P5, the first interface P1, the second interface P2, the third interface P3 and the fourth interface P4, the corresponding power supply, the normally open contact of the first section bus isolation switch G1, and the second section bus isolation The normally open contact of the switch G2, the normally open contact of the line side isolating switch G3 and the normally open contact of the circuit breaker DL;

S2. When carrying out the bus inversion operation from the operation of the first bus M1 to the operation of the second bus M2, control the switch K1 to the first cut-off end, so that the second bus isolating switch controller J2 is charged;

S3. Control the switch on of the second-section bus isolating switch G2, so that the second contact pair X2 is connected, and the first-section bus isolating switch controller J1 is electrified, and completes the bus switching operation.

As can be seen from the above description, the beneficial effect of the present invention is that an interface with a pair of contacts is provided on the device housing 1, which are respectively used to connect the normally open contacts on the double bus of the power system such as the first section of the bus isolating switch G1 and other electronic components, through the connection relationship between the contact pair, switch K1 and various controllers, the operation logic suitable for the mother-inversion operation is formed. When the mother-inverting operation is performed according to the formed operation logic, the occurrence of the mother-inversion can be reliably avoided. Misoperation makes electrical work safer.

Further, the following steps are also included:

S4. On the first interface P1, the second interface P2, the third interface P3 and the fourth interface P4, correspondingly connect the normally closed contact of the first section of the bus disconnector G1 and the second section of the busbar The normally closed contact of the isolating switch G2, the normally closed contact of the line side isolating switch G3 and the normally closed contact of the circuit breaker DL;

S5. When the stop and recommissioning operation is performed under the condition that the first section of the bus M1 is running, control the switch K1 to the second line-cutting end, and disconnect the circuit breaker DL, so that the fifth contact pair X5 is disconnected, and the tenth The two contact pairs X12 are closed, the first-section busbar isolating switch controller J1 and the second-section busbar isolating switch controller J2 are both powered off, and the line-side isolating switch controller J3 is charged;

S6. Control the opening of the line-side isolating switch G3, so that the tenth contact pair X10 and the eleventh contact pair X11 are closed, and the first-section bus-bar isolating switch controller J1 and the second-section bus-bar isolating switch controller J2 are both charged. Complete the decommissioning and recommissioning operation.

As can be seen from the above description, by setting more contact pairs and connection relationships to form the wiring logic for shutdown and recommissioning, the shutdown and recommissioning operations must be performed in the correct order to achieve the expected results, which can effectively prevent misoperations from occurring, and through The changeover switch K1 is used to switch over the busbar and stop and resume service, which is flexible and convenient to use.

Further, steps are also included:

S7. During maintenance, control the transfer switch K1 to the third line-cutting terminal, so that the first-section busbar isolating switch controller J1 and the second-section busbar isolating switch controller J2 are powered off and the line side The isolating switch controller J3 is charged.

It can be seen from the above description that the transfer switch K1 also has a third line-cutting terminal, which is used to simultaneously charge the controller J1 of the first-section bus disconnector, the controller J2 of the second-section bus disconnector, and the controller J3 of the line-side disconnector J3, so that The busbar operation control is completely separated from the logic limit of the device, so as to facilitate the maintenance work on the isolating switch and so on.

Further, before the step S2, it also includes:

Unlock the padlock 3 to open the protective cover 2.

It can be seen from the above description that a protective cover 2 and a padlock 3 are provided on the switch K1 to ensure that the switch K1 will not be misoperated by others and ensure the safety of the device.

Further, the step S1 specifically includes:

According to the different lengths of the first pin and the second pin, the first contact pair X1 and the seventh contact pair X7 are respectively connected to the normally open contact and the normally closed contact of the first-section bus disconnector G1.

It can be seen from the above description that the fool-proof design of wiring is formed by setting the first pin and the second pin with different lengths, so as to ensure that the wiring is less prone to mistakes and improve the wiring efficiency.

A logic operation device and its use method of the present invention can be applied to the scene of busbar opening and closing operation, and will be described in the following specific implementation modes:

Please refer to Fig. 1 to Fig. 3, embodiment one of the present invention is:

A logic operation device, as shown in Fig. 1 to Fig. 3 , includes a device housing 1 and a power interface P5 located on the device housing 1, a switch K1, a first interface P1, a second interface P2, and a third interface P3 And the fourth interface P4; the first interface P1 is provided with a first contact pair X1 for connecting to the normally open contact of the first section of the bus isolating switch G1, and the second interface P2 is provided with for connecting to the second section of the bus isolating switch G2 The second contact pair X2 of the normally open contact, the third interface P3 is provided with the third contact pair X3 and the fourth contact pair X4 of the normally open contact of the line side isolating switch G3, and the fourth interface P4 is provided with The fifth contact pair X5 connected to the normally open contact of the circuit breaker DL; the common end of the switch K1 is connected to the power interface P5, the first tangent end of the switch K1 is connected to one end of the fifth contact pair X5, and the fifth The other end of the contact pair X5 is connected to one end of the first contact pair X1 and one end of the second contact pair X2 at the same time, the other end of the first contact pair X1 is connected to one end of the third contact pair X3, and the other end of the second contact pair X2 One end is connected to one end of the fourth contact pair X4; the other end of the third contact pair X3 and the other end of the fourth contact pair X4 are respectively used to connect the first section bus disconnector controller J1 and the second busbar disconnector controller J2.

In this embodiment, as shown in Figure 3, the logic circuit of the inverted mother operation formed by the above components; wherein, the connection relationship between the first contact pair X1, the second contact pair X2, etc. is all through the connection terminals inside the device and connecting wires are completed.

In this embodiment, as shown in Figure 2, the device also includes a protective cover 2 and a padlock 3; the protective cover 2 is arranged on the device housing 1 and covers the switch K1; the padlock 3 is arranged on the protective cover 2, only if the It can only be opened when operating conditions and requirements are required, thereby opening the protective cover 2 to operate, which has played a double role of error prevention; and the protective cover 2 is preferably a glass cover. , you can break the glass cover to operate.

Please refer to Fig. 1 to Fig. 3, embodiment two of the present invention is:

A logic operation device, on the basis of the above-mentioned first embodiment, as shown in Fig. 1 to Fig. 3, the first interface P1 is also provided with a normally open contact and a normally closed contact for connecting to the first segment of the bus disconnector G1. The sixth contact pair X6 and the seventh contact pair X7 of the point, the second interface P2 is also provided with the eighth contact pair and the ninth contact pair for connecting the normally open contact and the normally closed contact of the second bus disconnector G2 X9, the third interface P3 is also provided with the tenth contact pair X10 and the eleventh contact pair X11 for accessing the normally closed contact of the line side isolating switch G3, and the fourth interface P4 is provided with the normally closed contact for accessing the circuit breaker DL The twelfth contact pair X12 of the contacts;

Moreover, the second tangent end of the switch K1 is connected to one end of the twelfth contact pair X12, and the other end of the twelfth contact pair X12 is simultaneously connected to one end of the seventh contact pair X7, one end of the ninth contact pair X9, and the tenth contact pair X12. One end of the contact pair X10 is connected to one end of the eleventh contact pair X11, the other end of the seventh contact pair X7 is connected to one end of the eighth contact pair X8, the other end of the ninth contact pair X9 is connected to one end of the sixth contact pair X6 connected; the other end of the sixth contact pair X6 and the other end of the eighth contact pair X8 are used to connect the line side isolating switch controller J3, the other end of the tenth contact pair X10 and the other end of the eleventh contact pair X11 are respectively It is used to connect the controller J1 of the first-section bus disconnector and the controller J2 of the second-section bus disconnector.

In this embodiment, as shown in FIG. 3 , the above-mentioned components constitute a logic circuit of the shutdown and recommissioning operation. Moreover, the diverter switch K1 also has a third line-cutting terminal, which is simultaneously connected to the first-section bus disconnector controller J1, the second-section busbar disconnector controller J2 and the line-side disconnector controller J3.

In this embodiment, as shown in FIG. 2 , the first interface P1 is provided with a first pin and a second pin, the length of the first pin is greater than the length of the second pin; the two first pins and The two second pins form the first contact pair X1 and the seventh contact pair X7 respectively. In addition, the second interface P2, the third interface P3 and the fourth interface P4 are all provided with pin structures with different lengths. On the one hand, the long and short pins have obvious functional differences, which is convenient for searching for correct wiring and wrong wiring. On the other hand, the long and short pins form a trapezoidal structure, which is flexible in insertion and removal, and secure in installation. Moreover, in this embodiment, the first interface P1, the second interface P2, etc. are groove structures. In the first interface P1, the first pins are arranged near the center, and the second pins are located on both sides of the groove.

Please refer to Fig. 3 to Fig. 5, embodiment three of the present invention is:

A method for using a logic operation device, which is applied to a logic operation device in Embodiment 1 or 2, as shown in Figure 5, includes the following steps:

S1. On the power supply interface P5, the first interface P1, the second interface P2, the third interface P3 and the fourth interface P4, the corresponding power supply, the normally open contact of the first section bus isolation switch G1, and the second section bus isolation The normally open contact of the switch G2, the normally open contact of the line side isolating switch G3 and the normally open contact of the circuit breaker DL;

S2. When carrying out the bus inversion operation from the operation of the first bus M1 to the operation of the second bus M2, control the switch K1 to the first cut-off end, so that the second bus isolating switch controller J2 is charged;

In this embodiment, as shown in Fig. 3 and Fig. 4, when the line is operated by the first section bus, the first section bus disconnector G1, the circuit breaker DL and the line side isolating switch G3 are in the closing position, and the second section The bus isolating switch G2 is in the opening position, so that the normally open contact of the first section of the bus isolating switch G1 is closed; the normally open contact of the second section of the bus isolating switch G2 is opened; the normally open contact of the line side isolating switch G3 and The normally open contacts of the circuit breaker DL are all closed; that is, the first contact pair X1 is closed; the second contact pair X2 is open; the third contact pair X3, the fourth contact pair X4 and the fifth contact pair X5 are all closed.

Now, the line is changed to run by the second section bus M2, and the operation is performed: control the transfer switch K1 to the first line cutting end, since the first section bus disconnector G1, the circuit breaker DL and the line side disconnector G3 are in the closing position, Their respective normally open contacts are closed, and the power supply passes through the fifth contact pair X5, the first contact pair X1 and the third contact pair X3 to the power supply terminal of the second-section bus isolation switch controller J2, so that the control of the second-section bus isolation The switch controller J2 is charged, and can perform the closing operation of the second section of the busbar M2;

S3. Control the switch on of the second-section bus isolating switch G2, so that the second contact pair X2 is connected, the first-section bus isolating switch controller J1 is electrified, and completes the bus switching operation.

In this embodiment, as shown in Fig. 3 and Fig. 4, after the second-section bus isolating switch G2 is closed, its normally open contact is closed, that is, the second contact pair X2 is closed, and the power supply passes through the fifth contact pair X5 1. The second contact pair X2 and the fourth contact are connected to the power supply terminal of the first-section bus isolating switch controller J1, so that the first-section bus isolating switch controller J1 is controlled to be electrified, and the first-section bus opening operation can be performed. At this point, the bus inversion operation is completed; the line is run by the second section of the busbar M2, that is, the second section of the busbar isolation switch G2, the circuit breaker DL and the line side isolation switch G3 are in the closing position, and the first section of the busbar isolation switch G1 is in the opening position Location.

It can be seen that, through the circuit logic limitation of this device, the operation of changing the operation of the first section of the bus M1 to the operation of the second section of the bus M2 needs to go through the above-mentioned specific process before it can be finally completed, thereby effectively avoiding misoperation by the operator; Similarly, when performing bus inversion operation from the operation of the second bus M2 to the operation of the first bus, the operation process is similar to the operation logic of the above process, and will not be repeated here.

In this embodiment, before step S2, it also includes: opening the padlock 3 to open the protective cover 2; in an emergency situation where the padlock 3 cannot be opened, the protective cover 2 can be smashed for operation.

Please refer to Fig. 3 and Fig. 4, embodiment four of the present invention is:

A method for using a logic operation device, applied to a logic operation device in Embodiment 2, comprising the following steps:

S4. On the first interface P1, the second interface P2, the third interface P3 and the fourth interface P4, correspondingly connect the normally closed contact of the first segment of the bus isolating switch G1, the normally closed contact of the second segment of the bus isolating switch G2, The normally closed contact of the line side isolating switch G3 and the normally closed contact of the circuit breaker DL;

S5. When the stop and recommissioning operation is performed under the condition that the first section of the bus M1 is running, control the switch K1 to the second line trimming end, and disconnect the circuit breaker DL, so that the fifth contact pair X5 is disconnected, and the twelfth contact pair X12 Closed, the first-section bus disconnector controller J1 and the second-section busbar disconnector controller J2 are powered off, and the line-side disconnector controller J3 is electrified;

In this embodiment, the operation of stopping and resuming service: according to the "State Grid Corporation Electric Power Safety Work Regulations" "power failure and switching operations should be in accordance with the circuit breaker DL (switch) - load side isolating switch (knife switch) - power supply side isolating switch (knife switch) Gates) in sequence" regulations.

In this embodiment, as shown in Figure 3 and Figure 4, when the first section of the bus M1 is running, the first section of the bus disconnector G1, the circuit breaker DL and the line side isolating switch G3 are in the closing position, and the second section of the busbar M1 is in the closing position. The section bus isolating switch G2 is in the opening position, so that the normally closed contact of the first section bus isolating switch G1 is opened, and the normally open contact is closed; the second section of the bus isolating switch G2 is normally closed, and the normally open contact is closed; Both the normally closed contact of the line side isolating switch G3 and the normally closed contact of the circuit breaker DL are open, that is, the sixth contact pair X6 is closed, the seventh contact pair X7 is open; the eighth contact pair X8 is open, and the ninth contact pair is open. X9 is closed, and the tenth contact pair X10, the eleventh contact pair X11, and the twelfth contact pair X12 are all open; at this time, control the switch K1 to the second tangent end, and disconnect the circuit breaker DL, so that the fifth contact pair X5 is disconnected, and the twelfth contact is closed to X12; both the first section bus isolation switch controller J1 and the second section bus isolation switch controller J2 are powered off, and the first section bus M1 or the second section bus M2 cannot be divided. Closing operation: the power supply passes through the twelfth contact pair X12, the sixth contact pair X6 and the ninth contact pair X9 to the power supply end of the line-side isolating switch controller J3, and the line-side isolating switch controller J3 is electrified.

S6. Control the opening of the line-side isolating switch G3, so that the tenth contact pair X10 and the eleventh contact pair X11 are closed, the first-section bus-bar isolating switch controller J1 and the second-section bus-bar isolating switch controller J2 are charged, and the shutdown is completed. Recommissioning operation.

In this embodiment, as shown in Fig. 3 and Fig. 4, the opening of the line-side isolating switch G3 is controlled, that is, the normally closed contact of the line-side isolating switch G3 is closed, so that the tenth contact pair X10 and the eleventh contact pair X11 Closed; at this time, the power supply not only passes through the twelve contact pairs and the tenth contact pair X10 to the power supply terminal of the first section of the bus isolation switch controller J1, but also passes through the twelve contact pairs and the eleventh contact pair X11 to the second section of the bus The power terminal of the isolating switch controller J2 can further perform the opening and closing operation of the first section of the bus M1 or the second section of the bus M2.

S7. During maintenance, control the switching switch K1 to the third line-cutting end, so that the first-section busbar isolating switch controller J1 and the second-section busbar isolating switch controller J2 are powered off and the line-side isolating switch controller J3 is charged.

In this embodiment, as shown in Fig. 3 and Fig. 4, a third switching terminal is set at the transfer switch K1, so that both the first-section bus isolating switch controller J1 and the second-section bus-bar isolating switch controller J2 are powered off Both the line side isolating switch controller J3 and the line side isolating switch controller are charged; at this time, the opening and closing operation of the line is not controlled by the logic of the device, and can be carried out at will, so as to facilitate maintenance work.

To sum up, the present invention provides a logical operation device and its method of use. Interfaces with contact pairs are provided on the device housing, which are respectively used to connect to the double busbars of the power system, such as the first-section busbar isolating switch. Electronic components such as normally open contacts, through the connection relationship between contact pairs, switches and various controllers, form an operation logic suitable for switching mothers or stopping and resuming operations. Operate with advanced operating logic, which can avoid misoperation caused by mother down or shutdown and recommissioning. At the same time, protective components such as protective covers and padlocks are added to achieve double protection and make electrical work safer.

The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent transformations made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in related technical fields, are all included in the same principle. Within the scope of patent protection of the present invention.

Claims (10)

1. A logic operation device is characterized by comprising a device shell, and a power interface, a change-over switch, a first interface, a second interface, a third interface and a fourth interface which are positioned on the device shell;

the first interface is provided with a first contact pair for accessing a normally open contact of a first section of bus isolating switch, the second interface is provided with a second contact pair for accessing a normally open contact of a second section of bus isolating switch, the third interface is provided with a third contact pair and a fourth contact pair for accessing the normally open contact of a line side isolating switch, and the fourth interface is provided with a fifth contact pair for accessing a normally open contact of a breaker;

a common end of the change-over switch is connected with the power supply interface, a first tangent end of the change-over switch is connected with one end of a fifth contact pair, the other end of the fifth contact pair is connected with one end of the first contact pair and one end of the second contact pair, the other end of the first contact pair is connected with one end of the third contact pair, and the other end of the second contact pair is connected with one end of the fourth contact pair;

the other end of the third contact pair and the other end of the fourth contact pair are respectively used for connecting a first section of bus isolation controller and a second section of bus isolation controller.

2. A logic operation device according to claim 1, wherein the first interface is further provided with a sixth contact pair and a seventh contact pair for accessing a normally open contact and a normally closed contact of a first section of bus isolating switch, the second interface is further provided with an eighth contact pair and a ninth contact pair for accessing a normally open contact and a normally closed contact of a second section of bus isolating switch, the third interface is further provided with a tenth contact pair and an eleventh contact pair for accessing a normally closed contact of a line side isolating switch, and the fourth interface is provided with a twelfth contact pair for accessing a normally closed contact of a circuit breaker;

a second tangent end of the change-over switch is connected with one end of the twelfth contact pair, the other end of the twelfth contact pair is simultaneously connected with one end of the seventh contact pair, one end of the ninth contact pair, one end of the tenth contact pair and one end of the eleventh contact pair, the other end of the seventh contact pair is connected with one end of the eighth contact pair, and the other end of the ninth contact pair is connected with one end of the sixth contact pair;

the other end of the sixth contact pair and the other end of the eighth contact pair are both used for connecting a line side isolation controller, and the other end of the tenth contact pair and the other end of the eleventh contact pair are respectively used for connecting the first section of bus isolation controller and the second section of bus isolation controller.

3. A logic operated device according to claim 2 wherein the diverter switch further has a third tangent terminal connected to the first section bus isolation controller, the second section bus isolation controller and the line side isolation controller simultaneously.

4. A logic operation device according to claim 1, further comprising a protective cover and a padlock;

the protective cover is arranged on the device shell and covers the change-over switch;

the padlock is arranged on the protection cover.

5. The logic operation device according to claim 2, wherein a first pin and a second pin are arranged in the first interface, and the length of the first pin is greater than that of the second pin;

the two first contact pins and the two second contact pins respectively form the first contact pair and the seventh contact pair.

6. A method for using a logical operation device, applied to the logical operation device of any one of claims 1 to 5, comprising the steps of:

s1, correspondingly accessing a power supply, a normally open contact of a first section of bus isolating switch, a normally open contact of a second section of bus isolating switch, a normally open contact of a line side isolating switch and a normally open contact of a circuit breaker on a power supply interface, a first interface, a second interface, a third interface and a fourth interface;

s2, when a bus reversing operation that the operation of a first section of bus is changed into the operation of a second section of bus is carried out, controlling a change-over switch to a first tangent terminal to electrify an isolation controller of the second section of bus;

and S3, controlling the second section of bus isolating switch to be switched on, so that the second contact is switched on, and the first section of bus isolating switch controller is electrified to finish the bus reversing operation.

7. The use method of the logic operation device according to claim 6, further comprising the steps of:

s4, correspondingly connecting a first section of bus isolating switch normally closed contact, a second section of bus isolating switch normally closed contact, a line side isolating switch normally closed contact and a breaker normally closed contact to the first interface, the second interface, the third interface and the fourth interface;

s5, when the first section of bus is in outage and restoration operation under the condition that the first section of bus is running, controlling the change-over switch to a second tangent end, disconnecting the breaker to enable a fifth contact pair to be disconnected and a twelfth contact pair to be closed, disconnecting the first section of bus isolation controller and the second section of bus isolation controller, and enabling a line side isolation controller to be electrified;

and S6, controlling the line side isolating switch to open, closing the tenth contact pair and the eleventh contact pair, and electrifying the first section of bus isolating controller and the second section of bus isolating controller to complete the stop-and-go operation.

8. The method for using the logic operation device according to claim 7, further comprising the steps of:

and S7, controlling the change-over switch to a third tangent end during maintenance, so that the first section of bus isolation controller and the second section of bus isolation controller are both powered off and the line side isolation controller is both electrified.

9. The method of claim 6, wherein the step S2 is preceded by the steps of:

the padlock is opened to open the protective cover.

10. The method for using a logic operation device according to claim 7, wherein the step S1 specifically includes:

and according to the different lengths of the first contact pin and the second contact pin, the normally open contact and the normally closed contact of the first section of bus isolating switch are respectively connected to the first contact pair and the seventh contact pair.

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