KR100637902B1 - Gas insulated switchgear - Google Patents

Abstract

A gas insulated switchgear is provided to easily couple dual buses with a 3-way switch by using a conductor branched from a circuit breaker. A first power cable(21a) is connected to a first cable connector(12a). The first power cable is introduced inside a first tank(A1) via a first insulator(11a), which insulates an inner portion of the first tank from atmosphere. The first power cable is connected to a first circuit breaker(6a), which forcefully disconnects a load current when an erroneous current and an erroneous voltage are detected, via a conductor(17). A second power cable(21b) is connected to a second cable connector(12b). The second power cable is introduced inside a fourth tank(B1) via a second insulator(11b), which insulates an inner portion of the fourth tank from atmosphere. The second power cable is connected to a second circuit breaker(6b), which forcefully disconnects the load current when the erroneous current and the erroneous voltage are detected, via the conductor. A third power cable(21c) is connected to a third cable connector(12c). The third power cable is introduced inside a seventh tank(C1) via a third insulator(11c), which insulates an inner portion of the seventh tank from atmosphere. The third power cable is connected to a third circuit breaker(6c), which forcefully disconnects the load current when the erroneous current and the erroneous voltage are detected, via the conductor.

Description

Gas Insulated Switchgear {GAS INSULATED SWITCHGEAR}

1 is a view showing the configuration of a conventional single bus gas insulated switchgear.

2 is a view showing the configuration of a conventional double bus gas insulated switchgear.

3 is a view showing the configuration of a single bus gas insulated switchgear according to the present invention.

4 is a diagram illustrating a disconnection diagram of a single bus gas insulated switchgear of FIG. 3.

5 is a view showing the configuration of a double bus gas insulated switchgear according to the present invention.

FIG. 6 is a diagram illustrating a disconnection diagram of a double-bar gas insulated switchgear of FIG. 5. FIG.

The present invention relates to a gas insulated switchgear, and more particularly, the gas tank is separated into three phases in a single-phase, two-layer, and three-layer single-phase tanks in order from the bottom, and installed vertically, respectively, and the bus line is one-phase, The present invention relates to a gas insulated switchgear which is separated into three rows of two phases and three phases so that the progress of a three-phase short circuit accident is not diffused against a short circuit and a ground fault.

In general, gas insulated switchgear collectively stores equipment installed in air in a metal tank filled with SF6 gas with good dielectric strength, and blocks the spread of accidents or breakdowns occurring in transmission lines and transformers. It is a kind of power equipment system that prevents safety accidents in advance.

The structure of the conventional gas insulated switchgear will be described with reference to FIGS. 1 and 2 as follows.

1 is a view showing the configuration of a conventional single bus gas insulated switchgear, Figure 2 is a view showing the configuration of a conventional double bus gas insulated switchgear.

As shown in FIG. 1, in the conventional single bus gas insulated switchgear, a power cable 12a for drawing or drawing an electric supply is connected to the cable connection part 12, while separating the atmosphere from the inside of the gas tank 19. A breaker (6) is introduced into the gas tank (19) filled with the insulating gas (18) through the cable head (11), which is an insulator that maintains insulation, and which can artificially cut off the load current in case of abnormal current and abnormal voltage. Is connected via a conductor (17).

At this time, one side of the breaker 6 is provided with a circuit breaker operation means for driving the contact of the breaker part, and when the abnormal current is detected, the circuit breaker operation means 8 operates by receiving a signal of this sensing current. As a result, the contacts of the circuit breaker 6 block the abnormal current or the normal current.

In addition, a 3-way switch 2 is connected to the breaker 6 through a conductor 17, and the 3-way switch 2 connects the breaker 6 and the bus bar 1 and then breaks the wire. When the movable electrode 7 of the 3-way switch 2 is between the disconnector fixed side contact 3 and the ground fixed side contact 4, it acts as a disconnector.

At this time, the 3-way switch (2) is provided with a three-way switch operating means (9) for switching the contact of the three-way switch, the breaker 6 and the bus bar (1) for connecting and disconnecting Play a role.

That is, when the movable electrode 7 of the 3-way switch 2 is located at the ground fixed side contact 4, the ground switch acts as a ground switch, and the ground switch has a live bus line 1 and a breaker 6. It is used when maintenance and inspection is needed after 3-way switch (2).

At this time, in the bus bar 1, the a-phase busbar 1a, the b-phase busbar 1b, and the c-phase busbar 1c are collectively housed in one tank 19 of the three-phase batch tanks.

Meanwhile, in the case of the conventional double-line gas insulated switchgear shown in FIG. 2, the breaker 6 is connected to the first and second 3-way switches 2A and 2B through the conductor 17, and the first 3-way switch (2A) of the first three-way switch operating means (9a) installed on one side, serves to connect and break the breaker 6 and the first bus bar (1A), The second 3-way switch 2B connects and breaks the circuit breaker 6 and the second bus bar 1B according to the operation of the second 3-way switch operating means 9b installed on one side. do.

That is, in the case of a double bus, when the first 3-way switch 2A is to be supplied to electricity through the first and second 3-way switches 2A and 2B, the first 3-way switch 2A is operated. When the electrode 7A is connected to the disconnecting stationary side contact 3A and electricity is supplied to the second bus bar 1B, the movable electrode 7B of the second 3-way switch 2B is fixed to the disconnecting unit. Connect to contact 3B.

At this time, the first bus bar (1A) is a batch of a phase bus (1Aa), a b-phase bus bar (1Ab) and a c-phase bus bar (1Ac) of the first bus bar collectively housed in one tank 19 of the three-phase batch tank In the second busbar 1B, the a-phase busbar 1Ba, the b-phase busbar 1Bb and the c-phase busbar 1Bc of the second busbar are collectively housed in one tank 19 of the three-phase batch tank. It is.

In addition, the first and second three-way switches 2A and 2B connect the respective movable electrodes 7A or 7B to the disconnector fixed side contacts 3A or 3B of the first bus 1A or the second bus 1B. ) Or when the movable electrodes 7A or 7B are not connected to the disconnector fixed side contact points 3A or 3B of the first bus bar 1A or the second bus bar 1B. It can be selectively used depending on the conditions.

For reference, reference numerals 5, 5A, and 5B form an insulation compartment of the insulating gas 18 filled in the three-phase batch tank 19 of the single bus and double bus gas insulated switchgear, and at the same time, the conductor 17 It is an insulator that supports them.

As described above, in the gas insulated switchgear for the single bus and the double bus, which are constructed of the conventional three-phase collective structure, the buses 1, 1A, and 1B in the three-phase batch tank 19 have three phases ((1a, 1b, 1c). ), (1Aa, 1Ab, 1Ac), (1Ba, 1Bb, 1Bc)), so if a single accident causes a one- or two-wire accident, it goes to a three-wire accident and has a ripple effect on failure. There is a problem that is greatly spread.

In addition, in the conventional gas insulated switchgear, since the conductors 17 coexist in the three-phase batch tank 19 filled with the insulated gas 18, a switching surge voltage and an over voltage When the insulation of the insulating gas 18 insulated between the conductors 17 is destroyed by the same, short circuit and ground fault occur simultaneously and a large current (a few tens of amperes) flows to the three-phase batch tank 19. There is a problem that an arc with heat is generated.

In addition, the arc has developed a three-phase short circuit accident in which the conductors 17, the insulators 5, 5A, and 5B and various accessories in the tank 19 are melt-damaged and one-wire grounding and two-wire short-circuit accidents are collectively formed. At the same time, since the current in the gas insulated switchgear also becomes a three-line overcurrent state from the one-line overcurrent, there is a problem that not only makes the gas insulated switchgear itself unsafe, but also ultimately causes an electrostatic accident.

The present invention has been made to solve the above problems, the purpose is to separate the tank constituting the gas insulated switchgear into a three-stage single-phase tank of 1, 2 and 3 floors in order from the bottom, respectively installed vertically It is to provide a gas insulated switchgear which separates the bus bar into three rows of one phase, two phases and three phases so that the progress of the three-phase short circuit accident is not spread with respect to a short circuit and a ground fault.

In addition, another object of the present invention is configured in the form of a three-phase single-phase tank divided into one layer, two layers and three layers, to reduce the electromagnetic force between the conductors and at the same time to reduce vibration and noise to prevent accident risk factors in advance. It is possible to provide a gas insulated switchgear that can be prevented, and even if any accident occurs in each tank, the spread and repair range due to the accident are small, and the repair period can be shortened.

In addition, another object of the present invention is to provide a gas insulated switchgear having a structure in which a double-wire and a 3-way switch separately formed by conductors branched from a breaker are simply connected.

In addition, another object of the present invention is to provide a gas insulated switchgear that can minimize the use space by configuring a circuit breaker, a 3-way switch and a bus bar in a vertical arrangement.

In addition, another object of the present invention is to connect the electrical lead and the lead wire through the cable connecting portion, and the cable connecting portion is installed on the ground or underground to rise to the ground, it is easy to connect the cable connecting portion with the lead and lead wire It is to provide a gas insulated switchgear that can be.

In addition, another object of the present invention is to configure the enclosure of the three-phase single-phase tank made of aluminum (Al) to reduce the occurrence of eddy damage due to the large current and at the same time lower the temperature of the tank enclosure gas insulation that can provide stability It is to provide a switchgear.

Gas insulation switchgear of a three-phase short bus according to an aspect of the present invention for achieving the above object, 'A phase' and the first to third tanks (A1 to A3) installed in order from the lower side and 'B phase' in which the fourth to sixth tanks B1 to B3 are vertically installed in order from the lower side, and 'C phase' in which the seventh to ninth tanks C1 to C3 are vertically installed in the order from the lower side. A gas insulated switchgear having a separate structure of a three-phase short bus, which is separated from each other, wherein the 'phase A' includes a first power cable 21a connected to the first cable connection part 12a for introducing or drawing an electricity supply. At the same time, it is drawn into the first tank A1 and connected via a conductor 17 to a first circuit breaker 6a which artificially cuts off the load current when an abnormal current and voltage are generated, and the first inside the first tank A1. The first breaker 6a is connected to the first 3-way switch 2a in the second tank A2 via a conductor 17. The first 3-way switch 2a is connected to the first bus bar 1a in the third tank A3, and the 'B-phase' is a second power cable for drawing or drawing an electric supply. The conductor 17 is connected to the second cable connecting portion 12b and at the same time it is drawn into the fourth tank B1, so that the conductor 17 is connected to the second breaker 6b which artificially cuts off the load current when an abnormal current and an abnormal voltage are generated. Connected to the second circuit breaker 6b in the fourth tank B1 via a conductor 17, and a second 3-way switch 2b in the fifth tank B2 is connected to the second breaker 6b in the fourth tank B1. The second bus bar 1b in the sixth tank B3 is connected to the 3-way switch 2b of the sixth tank B3, and the 'C phase' has a third power cable 21c for introducing or drawing electricity supply. The third circuit breaker 6c, which is connected to the cable connecting portion 12c and is simultaneously introduced into the seventh tank C1, artificially cuts off the load current when an abnormal current and an abnormal voltage are generated. A third 3-way switch 2c in the eighth tank C2 is connected via a conductor 17 to the third breaker 6c in the seventh tank C1, and It is preferable that the third bus bar 1c in the ninth tank C3 is connected to the third 3-way switch 2c.

In addition, the gas insulated switchgear of the three-phase double-conductor according to another aspect of the present invention, the first tank (A1), the second tank (A2) and the third tank (A3) in a vertically installed state in order from the lower side The second tank A2a is connected to the second tank A2 via a conductor 17a, and the third phase tank A3a is vertically installed above the second tank A2a. In a state where the fourth tank B1, the fifth tank B2, and the sixth tank B3 are vertically installed in order from the lower side, the fifth tank B2b through the conductor 17b to the fifth tank B2. ) Is connected to the 'B phase' in which the sixth a tank B3b is vertically coupled to the upper side of the fifth a tank B2b, and the seventh tank C1, the eighth tank C2, and the ninth tank C3. ) Is installed vertically from the lower side, the eighth tank (C2c) is connected to the eighth tank (C2) via a conductor (17c), and the ninth tank (a) above the eighth tank (C2c) C3c) is a three-phase suited to separate 'phase C' vertically coupled A gas insulated switchgear having a separate structure of a busbar, wherein the 'phase A' is connected to the first cable connecting portion 12a while the first power cable 21a is connected to the first cable connection part 12a. A1) is connected through a conductor 17 to a first breaker 6a, which is drawn inside and artificially cuts off the load current in the event of abnormal current and voltage generation, and the first breaker 6a in the first tank A1. Is connected to the first 3-way switch 2Aa in the second tank A2 via a conductor 17, and the first a busbar in the third tank A3 is connected to the first 3-way switch 2Aa. (1Aa) is connected, the second tank (A2a) containing the 3-way switch (2Ba) of the first b is coupled to the side of the second tank (A2) via a conductor (17a), the second a Above the tank A2a, a third a tank A3a, which houses the first b busbar 1Ba connected to the 3-way switch 2Ba of the first b, is coupled. The second power cable 21b for drawing in or drawing out the supply is connected to the second cable connecting portion 12b and drawn into the fourth tank B1 to artificially cut off the load current in the event of abnormal current and voltage. The second breaker 6b is connected via a conductor 17 and the second breaker 6b in the fourth tank B1 is connected via a conductor 17 to the second 3-way of the second a in the fifth tank B2. The switch 2Ab is connected, and the 2a bus bar 1Ab in the sixth tank B3 is connected to the 3-way switch 2Ab of the second aa, and the third of the second tank 3b is connected to the side of the fifth tank B2. The fifth 5a tank B2b containing the -way switch 2Bb is coupled through the conductor 17b, and is connected to the three-way switch 2Bb of the second b above the fifth a tank B2b. The 6a tank B3b which accommodates 2b bus bar 1Bb is couple | bonded, The said "C phase" is the 3rd cable connection part 12c which is the 3rd power cable 21c which draws in or draws electricity supply. At the same time, it is drawn into the seventh tank (C1), connected to the third circuit breaker (6c) to artificially cut off the load current in the event of abnormal current and voltage is connected through the conductor (17), the seventh tank The third breaker 6c in (C1) is connected to the third 3-way switch 2Ac in the eighth tank C2 via the conductor 17, and to the third way 3-way switch 2Ac. The 3rd bus bar 1Ac in 9th tank C3 is connected, The 8th tank C2c which accommodates the 3rd 3-way switch 2Bc in the side surface of the 8th tank C2 is the conductor ( 17c) coupled to the upper side of the eighth tank (C2c) is coupled to the ninth tank (C3c) containing the third b bus bar (1Bc) connected to the three-way switch (2Bc) of the third b desirable.

Hereinafter, a gas insulated switchgear according to the present invention will be described in detail with reference to the accompanying drawings. In FIG. 3 to FIG. 6, the same reference numerals are given to the same elements, and detailed description thereof will be omitted.

3 is a view showing the configuration of a single bus gas insulated switchgear according to the present invention, Figure 4 is a diagram showing a disconnection diagram of the single bus gas insulated switchgear of Figure 3, Figure 5 is a double bus gas according to the present invention It is a figure which shows the structure of an insulated switchgear, and FIG. 6 is a figure which shows the disconnection diagram of the double-bar bus insulated switchgear of FIG.

First, a single bus gas insulated switchgear according to the present invention will be described with reference to FIGS. 3 and 4.

For reference, in the single bus gas insulated switchgear, for convenience of explanation, the vertical coupling of the first tank A1, the second tank A2 and the third tank A3 from the lower side is referred to as 'A phase', The vertical coupling of the 4th tank B1, the 5th tank B2, and the 6th tank B3 is called "B phase", and the 7th tank C1, the 8th tank C2, and the 9th tank ( The vertical coupling of C3) is called 'C phase'.

As shown, in the single bus gas insulated switchgear according to the present invention, the 'phase A' is connected to the first cable connection portion 12a is connected to the first power cable 21a for introducing or drawing the electricity supply, The first is introduced into the first tank (A1) through the insulator (11a) to maintain the insulation while separating the middle and the inside of the first tank (A1), and artificially cut off the load current in the event of abnormal current and abnormal voltage The breaker 6a is connected via a conductor 17.

In addition, a first 3-way switch 2a in the second tank A2 is connected to the first breaker 6a in the first tank A1 via the conductor 17, and the first 3- The first bus bar 1a in the third tank A3 is connected to the way switch 2a.

In this case, the first 3-way switch 2a connects and disconnects the first breaker 6a in the first tank A1 and the first bus bar 1a in the third tank A3. As shown in FIG. 4, when the movable electrode 7a of the first 3-way switch 2a is between the disconnecting stationary side contact 3a and the ground stationary side contact 4a, Play a role.

On the other hand, when the movable electrode 7a of the first 3-way switch 2a is located at the ground fixed side contact 4a, it acts as a ground switch. In this case, the first bus bar 1a is in a live state. It is used when maintenance and inspection are necessary after the first 3-way switch 2a on the side of the first breaker 6a.

At this time, the insulating tank 18 is filled in the first tank A1, the second tank A2, and the third tank A3, respectively, between the first tank A1 and the second tank A2. Alternatively, an insulator 5a or 13a is formed between the second tank A2 and the third tank A3 to partition the gas filled in each of the tanks and simultaneously support the conductor 17.

On the other hand, the 'phase B' is similar to the 'phase A', the second power cable 21b for introducing or drawing the electricity supply is connected to the second cable connecting portion 12b, the atmosphere and the fourth tank (B1) The conductor (2b) is drawn into the fourth tank (B1) through an insulator (11b) that maintains insulation while separating the inside, and a conductor (2) in the second breaker (6b) that artificially cuts off the load current when an abnormal current and an abnormal voltage occur. 17) is connected.

In addition, a second 3-way switch 2b in the fifth tank B2 is connected to the second breaker 6b in the fourth tank B1 via the conductor 17, and the second 3- The second bus bar 1b in the sixth tank B3 is connected to the way switch 2b.

At this time, the second 3-way switch 2b connects and disconnects the second breaker 6b in the fourth tank B1 and the second bus bar 1b in the sixth tank B3. As shown in FIG. 4, when the movable electrode 7b of the second 3-way switch 2b is located between the disconnector fixed side contact 3b and the ground fixed side contact 4b, Play a role.

On the other hand, when the movable electrode 7b of the second 3-way switch 2b is located at the ground fixed side contact 4b, it serves as a ground switch. In this case, the second bus bar 1b is in a live state. Used when maintenance and inspection is needed after the second 3-way switch 2b on the side of the second breaker 6b.

At this time, the insulating tank 18 is filled in the fourth tank B1, the fifth tank B2, and the sixth tank B3, respectively, between the fourth tank B1 and the fifth tank B2. Alternatively, an insulator 5b or 13b is formed between the fifth tank B2 and the sixth tank B3, respectively, to partition the gas filled in each of the tanks and simultaneously support the conductors 17.

On the other hand, the 'phase C' is similar to the 'phase A' and the 'phase B', the third power cable (21c) for drawing or drawing the power supply is connected to the third cable connection portion 12c, and The third circuit breaker is introduced into the seventh tank (C1) through the insulating material (11c) to maintain the insulation while separating the interior of the seventh tank (C1), and artificially cuts the load current in the event of abnormal current and abnormal voltage ( 6c) via a conductor 17.

In addition, a third 3-way switch 2c in the eighth tank C2 is connected to the third breaker 6c in the seventh tank C1 through the conductor 17, and the third 3- The third bus bar 1c in the ninth tank C3 is connected to the way switch 2c.

In this case, the third 3-way switch 2c connects and disconnects the second breaker 6c in the seventh tank C1 and the third bus bar 1c in the ninth tank C3. As shown in FIG. 4, when the movable electrode 7c of the third 3-way switch 2c is between the disconnector fixed side contact 3c and the ground fixed side contact 4c, the disconnector Plays a role.

On the other hand, when the movable electrode 7c of the third 3-way switch 2c is located at the ground fixed side contact 4c, it serves as a ground switch. In this case, the third bus bar 1c is in a live state. It is used when maintenance and inspection is needed after the third 3-way switch 2c on the third breaker 6c side.

At this time, the insulating gas 18 is filled in the seventh tank C1, the eighth tank C2, and the ninth tank C3, respectively, and between the seventh tank C1 and the eighth tank C2. Alternatively, an insulator 5c or 13c is formed between the eighth tank C2 and the ninth tank C3 to partition the gas filled in each of the tanks and simultaneously support the conductor 17.

One side of the first circuit breaker 6a, the second circuit breaker 6b, and the third circuit breaker 6c is provided with a circuit breaker operation means 8 for controlling a contact point of the circuit breaker. As the breaker operating means 8 operates in response to the signal of the sensed current, the first to third breakers 6a to 6c block the abnormal current or the normal current.

In addition, the 3-way switch 2a, the second 3-way switch 2b, and the third 3-way switch 2c are 3-way capable of switching the contact of the 3-way switch. The switch operating means 9 is provided, and serves to connect and disconnect the first to third breakers 6a to 6c and the first to third buses 1a to 1c.

In addition, the enclosure of the first to ninth tanks (A1 to C3) is made of aluminum (Al) material to reduce the occurrence of eddy damage due to a large current and to lower the temperature of the enclosure to provide stability of the gas insulated switchgear. It is preferable to comprise.

Therefore, according to the gas insulation apparatus of the single bus | bar structure comprised as mentioned above, "A phase" which inserted the 1st bus bar 1a by vertically installing the 1st-3rd tank A1-A3 from the lower side, and The fourth to sixth tanks B1 to B3 are vertically installed in order from the lower side, and the 'B phase' in which the second bus bar 1b is inserted, and the seventh to ninth tanks C1 to C3 are sequentially ordered from the lower side. It is possible to prevent the spread of three-phase short circuit accidents against short-circuit and ground fault accidents by adopting a separate structure of three-phase short busbars in which the 'C-phase' in which the third busbar 1c is inserted in the vertical installation is separated. .

Hereinafter, a double bus gas insulated switchgear according to the present invention will be described with reference to FIGS. 5 and 6.

For reference, in the double-bar gas insulated switchgear, for convenience of explanation, the second tank A2 in a state in which the first tank A1, the second tank A2, and the third tank A3 are vertically coupled from the lower side. A second tank A2a is connected via the conductor 17a, and a third tank A3a is vertically coupled to the upper side of the second tank A2a as 'A phase', and the fourth from the lower side. In a state where the tank B1, the fifth tank B2, and the sixth tank B3 are vertically coupled, the fifth tank B2b is connected to the fifth tank B2 via a conductor 17b, and A state in which the sixth a tank B3b is vertically coupled to the upper side of the fifth a tank B2b is referred to as 'phase B', and the seventh tank C1, the eighth tank C2, and the ninth tank C3 from the lower side. Is vertically coupled, the eighth tank C2c is connected to the eighth tank C2 through the conductor 17c, and the ninth tank C3c is vertically positioned above the eighth tank C2c. It is called combined 'C phase'.

As shown, in the double-wire gas insulated switchgear according to the present invention, the 'phase A' is connected to the first cable connection portion 12a is connected to the first power cable 21a for drawing or drawing the electricity supply, The first is introduced into the first tank (A1) through the insulator (11a) to maintain the insulation while separating the middle and the inside of the first tank (A1), and artificially cut off the load current in the event of abnormal current and abnormal voltage The breaker 6a is connected via a conductor 17.

In addition, the first breaker 6a in the first tank A1 is connected to the first 3-way switch 2Aa in the second tank A2 via a conductor 17, and the first 3- The first switch bus 1Aa in the third tank A3 is connected to the way switch 2Aa.

At the same time, the 2a tank A2a which accommodates the 3-way switch 2Ba of 1b is coupled to the side surface of the said 2nd tank A2 via the conductor 17a, and the said 2a tank A2a At the upper side of the third a tank A3a, which houses the first b busbar 1Ba connected to the 3-way switch 2Ba of the first b, is coupled.

In this case, the 3-way switch 2Aa of the first aa connects and breaks the first breaker 6a in the first tank A1 and the first a bus bar 1Aa in the third tank A3. In addition, the 3-way switch 2Ba of the first b connects and disconnects the first breaker 6a in the first tank A1 and the first b bus bar 1Ba in the third a tank A3a. do.

That is, as shown in FIG. 6, when it is going to supply electricity to the 1a bus bar 1Aa through the 3-way switch 2Aa of 1a and the 3-way switch 2Ba of 1b, 1b Operation of the 3-way switch 2Aa of the first a with the movable electrode 7a2 of the 3-way switch 2Ba in the state positioned between the disconnector fixed side contact 3a2 and the ground fixed side contact 4a2. When the electrode 7a1 is connected to the disconnecting stationary side contact 3a1 and the electricity is supplied to the 1b bus bar 1Ba, the movable electrode 7a1 of the 3-way switch 2Aa of the first a is fixed to the disconnector. In a state located between the side contact 3a1 and the ground fixed side contact 4a1, the movable electrode 7a2 of the 3-way switch 2Ba of the first b is connected to the disconnecting stationary side contact 3a2.

At this time, the 3-way switches 2Aa and 2Ba of the first a and the first b may connect the movable electrodes 7a1 or 7a2 to the disconnecting stationary side contacts 3a1 of the first a bus 1Aa or the first b bus 1Ba. When connecting to 3a2, respectively or simultaneously, and not connecting each of the movable electrodes 7a1 or 7a2 to the disconnecting stationary side contact (3a1 or 3a2) of the 1a bus (1Aa) or 1b bus (1Ba). It can be selectively used according to the conditions of use.

In addition, in the 'A phase', the first tank (A1), the second tank (A2), the third tank (A3), the second tank (A2a) and the third tank (A3a), respectively, the insulating gas ( 18) is filled, an insulator 14a is formed between the first tank A1 and the second tank A2, and between the second tank A2 and the third tank A3, the second tank a Insulators 13Aa and 13Ba are formed between A2a and the third tank A3a, and insulators 5a are formed between the second tank A2 and the second tank A2a, and between each tank. The conductors 17 and 17a are supported at the same time as the gas filled in is partitioned.

On the other hand, in the double-column gas insulated switchgear according to the present invention, the 'B phase' is similar to the 'A phase', the second power cable 21b for introducing or drawing the power supply is the second cable connection portion 12b It is connected to the inside of the fourth tank (B1) through the insulator (11b) that maintains the insulation while separating the atmosphere and the inside of the fourth tank (B1), and artificially load current in the event of abnormal current and abnormal voltage It is connected via a conductor 17 to the second breaker (6b) to cut off.

In addition, a second 3-way switch 2Ab in the fifth tank B2 is connected to the second breaker 6b in the fourth tank B1 through the conductor 17, and 3- in the second a To the way switch 2Ab, a second bus bar 1Ab in the sixth tank B3 is connected.

At the same time, the fifth tank B2b containing the second three-way switch 2Bb is coupled to the side of the fifth tank B2 via the conductor 17b, and the fifth tank B2b is connected to the fifth tank B2. The sixth tank B3b, which houses the second bus bar 1Bb connected to the 3-way switch 2Bb of the second b, is coupled to the upper side of the sixth tank B3b.

At this time, the 3-way switch 2Ab of the second aa connects and disconnects the second breaker 6b in the fourth tank B1 and the second a bus bar 1Ab in the sixth tank B3. In addition, the 3-way switch 2Bb of the second bb connects and disconnects the second breaker 6b in the fourth tank B1 and the second b busbar 1Bb in the sixth tank B3b. do.

That is, as shown in FIG. 6, when it is going to supply electricity to the 2a bus bar 1Ab through the 3-way switch 2Ab of 2a and the 3-way switch 2Bb of 2nd, 2b Operation of the two-way switch 2Ab in the state where the movable electrode 7b2 of the 3-way switch 2Bb is positioned between the disconnector fixed side contact 3b2 and the ground fixed side contact 4b2 When the electrode 7b1 is connected to the disconnecting stationary side contact 3b1 and the electricity is supplied to the second busbar 1Bb, the disconnecting stationary side of the movable electrode 7b1 of the 3-way switch 2Ab of the second aa In the state located between the contact 3b1 and the ground fixed side contact 4b1, the movable electrode 7b2 of the 3-way switch 2Bb of the second b is connected to the disconnector fixed side contact 3b2.

In this case, the 3-way switches 2Ab and 2Bb of the second and second b may connect the movable electrodes 7b1 or 7b2 to the disconnecting stationary side contacts 3b1 of the 2a bus bar 1Ab or the 2b bus bar 1Bb. 3b2), or at the same time, and not connecting the movable electrodes 7b1 or 7b2 to the disconnector fixed side contacts 3b1 or 3b2 of the 2a bus bar 1Ab or the 2b bus bar 1Bb. It can be selectively used according to the conditions of use.

In the case of 'B phase', the insulating gas 18 is respectively provided in the fourth tank B1, the fifth tank B2, the sixth tank B3, the fifth a tank B2b, and the sixth a tank B3b. ) Is filled, an insulator 14b is formed between the fourth tank A1 and the fifth tank A2, and between the fifth tank B2 and the sixth tank B3, the fifth tank ( Insulators 13Ab and 13Bb are formed between B2b) and the sixth tank B3b, and an insulator 5b is formed between the fifth tank B2 and the fifth a tank B2b, and between the respective tanks. The packed gas is partitioned and at the same time supports the conductors 17 and 17b.

On the other hand, in the double-column gas insulated switchgear according to the present invention, the 'C phase' is a third power cable (21c) for introducing or withdrawing the electricity supply, similar to the 'A phase' and 'B phase' It is connected to the cable connecting portion 12c and is introduced into the seventh tank (C1) through the insulator (11c) to maintain the insulation while separating the atmosphere and the interior of the seventh tank (C1), when abnormal current and abnormal voltage occurs Is connected via a conductor 17 to a third breaker 6c which artificially cuts off the load current.

In addition, a third 3-way switch 2Ac in the eighth tank C2 is connected to the third breaker 6c in the seventh tank C1 through the conductor 17, and the third of the third a The 3a bus bar 1Ac in the 9th tank C3 is connected to the way switch 2Ac.

At the same time, on the side of the eighth tank C2, the eighth a tank C2c containing the 3-way switch 2Bc of the third b is coupled through the conductor 17c, and the eighth a tank C2c At the upper side of the ninth tank C3c containing the third bus bar 1Bc connected to the 3-way switch 2Bc of the third b is coupled.

At this time, the 3-way switch 2Ac of the third a connects and breaks the third breaker 6c in the seventh tank C1 and the third a bus bar 1Ac in the ninth tank C3. The 3-way switch 2Bc of the third bb connects and disconnects the third breaker 6c in the seventh tank C1 and the third b busbar 1Bc in the ninth tank C3c. do.

That is, as shown in FIG. 6, when it is desired to supply electricity to the 3a bus bar 1Ac through the 3-way switch 2Ac of the 3a and the 3-way switch 2Bc of the 3b, the 3b Of the 3-way switch 2Ac of the third a, with the movable electrode 7c2 of the 3-way switch 2Bc of the 3-way switch 2Bc positioned between the disconnector fixed-side contact 3c2 and the ground fixed-side contact 4c2. When the electrode 7c1 is connected to the disconnecting stationary side contact 3c1 and the electricity is supplied to the 3b bus bar 1Bc, the movable electrode 7c1 of the 3-way switch 2Ac of the third 3a is fixed to the disconnector. In a state located between the side contact 3c1 and the ground fixed side contact 4c1, the movable electrode 7c2 of the 3-way switch 2Bc of the third b is connected to the disconnecting stationary side contact 3c2.

In this case, the 3-way switches 2Ac and 2Bc of the 3a and 3b may connect the movable electrodes 7c1 or 7c2 to the disconnecting stationary side contacts 3c1 of the 3a bus bar 1Ac or the 3b bus bar 1Bc. When connecting to 3c2), respectively or simultaneously, and not connecting each of the movable electrodes (7c1 or 7c2) to the disconnector fixed side contact (3c1 or 3c2) of the 3a bus (1Ac) or 3b bus (1Bc). It can be selectively used according to the conditions of use.

In addition, in the 'C phase', the insulating gas 18 is respectively provided in the seventh tank C1, the eighth tank C2, the ninth tank C3, the eighth tank C2c, and the ninth tank C3c. ) Is filled, and an insulator 14c is formed between the seventh tank C1 and the eighth tank C2, and between the eighth tank C2 and the ninth tank C3, the eighth tank ( Insulators 13Ac and 13Bc are formed between C2c) and the ninth tank C3c, and an insulator 5c is formed between the eighth tank C2 and the eighth tank C2c, and between the respective tanks. The conductors 17 and 17c are supported while partitioning the filled gas.

Then, at one side of the first circuit breaker 6a, the second circuit breaker 6b, and the third circuit breaker 6c, circuit breaker operation means 8 capable of controlling the contact points of the respective circuit breakers is installed, and the detection of abnormal currents. When the breaker operating means 8 operates in response to the signal of the sensed current, the first to third breakers 6a to 6c block the abnormal current or the normal current.

In addition, the first three-way switch (2Aa), the two-way switch (2Ab) and the three-way switch (2Ac) of the first 3a switch that can be switched between the first 3-way switch operation means 9a is installed to serve to connect and disconnect the first to third breakers 6a to 6c and the first to third buses 1Aa to 1Ac, and the third to the first b. a second 3-way switch operating means capable of switching the contact of each 3-way switch to the -way switch 2Ba, the 3-way switch 2Bb of the second b, and the 3-way switch 2Bc of the third b; (9b) is provided to serve to connect and disconnect the first to third breakers 6a to 6c and the first to third buses 1Ba to 1Bc.

In addition, the enclosure of the first to ninth tanks (A1 to C3c) is made of aluminum (Al) material to reduce the occurrence of eddy damage due to a large current and at the same time lower the temperature of the enclosure to provide stability of the gas insulated switchgear It is preferable to comprise.

Therefore, according to the gas insulator of the double-conductor structure configured as described above, the second tank (in the state in which the first tank A1, the second tank A2 and the third tank A3 are vertically coupled from the lower side). The second tank A2a is connected to the A2 through the conductor 17a, the 'A phase' in which the third tank A3a is vertically coupled to the upper side of the second tank A2a, and the fourth tank from the lower side. In a state in which (B1), the fifth tank (B2) and the sixth tank (B3) are vertically coupled, the fifth tank (B2b) is connected to the fifth tank (B2) via a conductor (17b), and the fifth 'B phase' in which the 6a tank B3b is vertically coupled to the upper side of the 5a tank B2b, and the seventh tank C1, the eighth tank C2, and the ninth tank C3 are vertically coupled from the lower side. In the state, the eighth tank (C2c) is connected to the eighth tank (C2) through the conductor (17c), the ninth tank (C3c) is vertically coupled to the upper side of the eighth tank (C2c) 'C phase Adopt separate structure of three-phase biploid with separate ' As, the progress of the three-phase short-circuit failure with respect to short-circuit or ground fault accidents can be prevented from spreading.

In the above described the present invention according to an embodiment of the present invention, it is obvious that those skilled in the art belong to the present invention changes and modifications within the scope without departing from the technical spirit of the present invention. Do.

As described above, according to the gas insulated switchgear according to the present invention, 'A phase' in which the first buses 1a are inserted by vertically installing the first to third tanks A1 to A3 from the lower side, The fourth to sixth tanks B1 to B3 are vertically installed in order from the lower side, and the 'B phase' in which the second bus bar 1b is inserted, and the seventh to ninth tanks C1 to C3 are sequentially ordered from the lower side. By adopting a three-phase split type structure in which the 'C-phase' in which the third busbar 1c is inserted in the vertical installation, separates the progress of the three-phase short circuit accident against short circuits and ground faults. Even if any accident occurs, the spread and repair range due to the accident are small, and the repair period can be shortened.

In addition, according to the present invention, it has a structure that can easily connect the bi-wire and the 3-way switch formed separately by the conductor branched from the breaker.

In addition, according to the present invention, by configuring the circuit breaker, the 3-way switch and the bus bar in a three-phase vertical arrangement structure, it is possible to minimize the use space of the gas insulated switchgear.

In addition, according to the present invention, it is possible to provide stability by reducing the temperature of the tank enclosure while reducing the occurrence of eddy damage due to the large current by configuring the enclosure of each tank of aluminum (Al) material.

Claims (12)

'A phase' in which the first to third tanks A1 to A3 are vertically installed in order from the lower side, 'B phase' in which the fourth to sixth tanks B1 to B3 are vertically installed in the order from the lower side, A gas insulated switchgear having a three-phase short bus separation type structure in which the seventh to ninth tanks (C1 to C3) are installed in a vertical manner in order from the lower side, respectively. 'A phase' is, The first power cable 21a, which draws in or draws out the electricity supply, is connected to the first cable connecting portion 12a and is drawn into the first tank A1 to artificially cut off the load current when an abnormal current and voltage are generated. The first breaker 6a is connected via a conductor 17 and the first breaker 6a in the first tank A1 is connected via a conductor 17 to the first 3-way in the second tank A2. A switch 2a is connected, and a first bus bar 1a in a third tank A3 is connected to the first 3-way switch 2a. 'B phase' is, The second power cable 21b which draws in or draws out the electricity supply is connected to the second cable connecting portion 12b and is drawn into the fourth tank B1 to artificially cut off the load current when an abnormal current and an abnormal voltage are generated. Is connected to the second breaker 6b via the conductor 17, and the second breaker 6b in the fourth tank B1 is connected to the second breaker 6b in the second tank 5 in the fifth tank B2 via the conductor 17. The way switch 2b is connected, and the second 3-way switch 2b is connected to the second bus bar 1b in the sixth tank B3. 'C phase' is, The third power cable 21c which draws in or draws out the electricity supply is connected to the third cable connecting portion 12c and simultaneously introduced into the seventh tank C1, so that the load current is artificially cut off when an abnormal current or an abnormal voltage occurs. Is connected to the third breaker 6c via the conductor 17, and the third breaker 6c in the seventh tank C1 is connected to the third breaker 6c in the eighth tank C2 via the conductor 17. A way switch 2c is connected, and the third 3-way switch 2c is connected to the third bus bar 1c in the ninth tank C3 gas insulated switchgear . The method of claim 1, An insulator 11a is inserted between the first cable connection part 12a and the first tank A1, and an insulator 11b is inserted between the second cable connection part 12b and the fourth tank B1. An insulator (11c) is inserted between the third cable connecting portion (12c) and the seventh tank (C1), the gas insulated switchgear of the three-phase short bus. The method of claim 1, The first 3-way switch 2a connects and disconnects the first breaker 6a in the first tank A1 and the first bus bar 1a in the third tank A3. , The second 3-way switch 2b connects and disconnects the second breaker 6b in the fourth tank B1 and the second bus bar 1b in the sixth tank B3. , The third 3-way switch 2c connects and disconnects the second breaker 6c in the seventh tank C1 and the third bus bar 1c in the ninth tank C3. Gas insulated switchgear of the three-phase short bus, characterized in that. The method according to claim 1 or 3, The first 3-way switch 2a serves as a ground switch when the movable electrode 7a is located at the ground fixed side contact 4a. The second 3-way switch 2b serves as a ground switch when the movable electrode 7b is located at the ground fixed side contact 4b. And said third 3-way switch (2c) serves as a ground switch when the movable electrode (7c) is located at the ground fixed side contact (4c). The method of claim 1, Insulation 5a or 13a is formed between the first tank A1 and the second tank A2 or between the second tank A2 and the third tank A3, respectively, so that each of the tanks is filled with insulation. The gas is partitioned and the conductor 17 is supported. Insulation 5b or 13b is formed between the fourth tank B1 and the fifth tank B2 or between the fifth tank B2 and the sixth tank B3, respectively, so that each of the tanks is filled with insulation. While partitioning the gas and at the same time supporting the conductor 17, Insulation 5c or 13c is formed between the seventh tank C1 and the eighth tank C2 or between the eighth tank C2 and the ninth tank C3, respectively, so that each of the tanks is filled with insulation. A gas insulated switchgear for a three-phase short bus, characterized in that the gas is partitioned and the conductor (17) is supported. The method of claim 1, The gas insulated switchgear of the three-phase short bus bar, characterized in that the first to ninth tank (A1 to C3) of the enclosure is made of aluminum (Al). In a state where the first tank A1, the second tank A2, and the third tank A3 are vertically installed in order from the lower side, the second tank A2 through the conductor 17a in the second tank A2a. ) Is connected to the 'A phase' in which the third a tank A3a is vertically installed above the second a tank A2a, the fourth tank B1, the fifth tank B2, and the sixth tank B3. Is installed vertically from the lower side, the fifth tank (B2b) is connected to the fifth tank (B2) via the conductor (17b), the sixth tank (B3b) above the fifth tank (B2b) ) Is attached to the eighth tank (C2) in a state in which the 'phase B' vertically coupled, and the seventh tank (C1), the eighth tank (C2) and the ninth tank (C3) are installed vertically in order from the lower side. An eighth-a tank C2c is connected through a conductor 17c, and a three-phase biploid separated type 'C', in which a ninth-a tank C3c is vertically coupled to an upper side of the eighth a tank C2c, respectively. A gas insulated switchgear having a structure, 'A phase' is, The first power cable 21a, which draws in or draws out the electricity supply, is connected to the first cable connecting portion 12a and is drawn into the first tank A1 to artificially cut off the load current when an abnormal current and voltage are generated. Is connected to the first circuit breaker 6a via the conductor 17, and the first circuit breaker 6a in the first tank A1 is connected to the first circuit breaker 6a via the conductor 17 in the first tank 3a of the second tank A2. The way switch 2Aa is connected, and the first 3-way switch 2Aa of the first a is connected to the first bus bar 1Aa in the third tank A3, and the first side of the second tank A2 is connected to the first switch 2b. The 2a tank A2a which accommodates the 3-way switch 2Ba of the said 2a tank A2a is couple | bonded through the conductor 17a, and the 3-way switch 2Ba of the said 1b is upper side of the said 2a tank A2a A third tank A3a containing the connected first b bus bar 1Ba is coupled, 'B phase' is, The second power cable 21b for drawing in or drawing out the electricity supply is connected to the second cable connecting part 12b and is drawn into the fourth tank B1 to artificially cut off the load current when an abnormal current and voltage are generated. Is connected to the second breaker 6b via the conductor 17, and the second breaker 6b in the fourth tank B1 is connected to the second breaker 6b in the fifth tank B2 through the conductor 17. The way switch 2Ab is connected, and the 2a bus bar 1Ab in the sixth tank B3 is connected to the 3-way switch 2Ab of the second aa, and the second side of the second tank is connected to the side of the fifth tank B2. The fifth 5a tank B2b containing the 3-way switch 2Bb is coupled through the conductor 17b, and is connected to the three-way switch 2Bb of the second b above the fifth a tank B2b. The sixth a tank B3b, which houses the second bus bar 1Bb, is coupled, 'C phase' is, The third power cable 21c which draws in or draws out the electricity supply is connected to the third cable connecting part 12c and is drawn into the seventh tank C1, and the load current is artificially cut off when an abnormal current and voltage are generated. Is connected to the third circuit breaker 6c via the conductor 17, and the third circuit breaker 6c in the seventh tank C1 is connected to the third circuit breaker 6c through the conductor 17 through the third 3-a of the third a in the eighth tank C2. A way switch 2Ac is connected, and the 3a bus bar 1Ac in the ninth tank C3 is connected to the 3-way switch 2Ac of the third a, and a third b is connected to the side of the eighth tank C2. The eighth a tank C2c containing the three-way switch 2Bc is coupled via a conductor 17c, and the three-way switch 2Bc of the third b is disposed on the upper side of the eighth a tank C2c. A gas insulated switchgear for a three-phase double busbar, characterized in that the ninth tank (C3c) containing the connected 3b bus bar (1Bc) is coupled. The method of claim 7, wherein An insulator 11a is inserted between the first cable connection part 12a and the first tank A1, and an insulator 11b is inserted between the second cable connection part 12b and the fourth tank B1. An insulator (11c) is inserted between the third cable connection portion (12c) and the seventh tank (C1), the gas insulated switchgear of the three-phase double bus. The method of claim 7, wherein The first 3-way switch 2Aa connects and disconnects the first breaker 6a in the first tank A1 and the first a bus bar 1Aa in the third tank A3. The first three-way switch 2Ba connects and disconnects the first breaker 6a in the first tank A1 and the first bus bar 1Ba in the third a tank A3a. , The second 3-way switch 2Ab connects and disconnects the second breaker 6b in the fourth tank B1 and the second bus bar 1Ab in the sixth tank B3. The second 3-way switch 2Bb connects and breaks the second breaker 6b in the fourth tank B1 and the second b busbar 1Bb in the sixth tank B3b. , The 3a 3-way switch 2Ac connects and disconnects the third breaker 6c in the seventh tank C1 and the third a bus bar 1Ac in the ninth tank C3. The 3-way switch 2Bc of the third bb connects and disconnects the third breaker 6c in the seventh tank C1 and the third b busbar 1Bc in the ninth tank C3c. Gas insulated switchgear of the three-phase double duct bus, characterized in that. The method according to claim 7 or 9, When the electricity is to be supplied to the first bus line 1Aa, the movable electrode 7a2 of the 3-way switch 2Ba of the first b is connected to the disconnecting stationary side contact 3a2 and the ground stationary side contact 4a2. In the state positioned in between, when the movable electrode 7a1 of the 3-way switch 2Aa of the first a is connected to the disconnecting stationary side contact 3a1, and to supply electricity to the first bus bar 1Ba, In a state in which the movable electrode 7a1 of the 3-way switch 2Aa of the first a is located between the disconnector fixed side contact 3a1 and the ground fixed side contact 4a1, the 3-way switch 2Ba of the first b The movable electrode (7a2) of the () to the disconnector fixed side contact (3a2), In the case of supplying electricity to the second bus bar 1Ab, the movable electrode 7b2 of the 3-way switch 2Bb of the second b2 is connected to the disconnecting stationary side contact 3b2 and the ground stationary side contact 4b2. In the state positioned in between, when the movable electrode 7b1 of the 3-way switch 2Ab of the second a is connected to the disconnecting stationary side contact 3b1, and to supply electricity to the second bus bar 1Bb, In the state of being located between the movable electrode 7b1 disconnector fixed side contact 3b1 and the ground fixed side contact 4b1 of the 2-way switch 2Ab of the second a, the 3-way switch 2Bb of the second b; The movable electrode (7b2) of the disconnector fixed side contact (3b2), In the case of supplying electricity to the 3a bus line 1Ac, the movable electrode 7c2 of the 3-way switch 2Bc of the third bb is connected to the disconnecting stationary side contact 3c2 and the ground stationary side contact 4c2. In the state positioned in between, when the movable electrode 7c1 of the 3-way switch 2Ac of the third a is connected to the disconnecting stationary side contact 3c1, and to supply electricity to the 3b bus bar 1Bc, The third 3-way switch 2Bc with the movable electrode 7c1 of the 3-way switch 2Ac of the third a positioned between the disconnector fixed side contact 3c1 and the ground fixed side contact 4c1. And a gas insulated switchgear of a three-phase double bus, characterized in that the movable electrode (7c2) of the c) is connected to the fixed side contact point (3c2) of the disconnector. The method of claim 7, wherein An insulator 14a is formed between the first tank A1 and the second tank A2, and between the second tank A2 and the third tank A3, the second a tank A2a and the third a Insulators 13Aa and 13Ba are formed between the tanks A3a, and an insulator 5a is formed between the second tank A2 and the second a tank A2a to fill the insulating gas filled between the tanks. At the same time as supporting the conductors 17 and 17a, An insulator 14b is formed between the fourth tank A1 and the fifth tank A2, and between the fifth tank B2 and the sixth tank B3, the fifth a tank B2b and the sixth a Insulators 13Ab and 13Bb are respectively formed between the tanks B3b, and an insulator 5b is formed between the fifth tank B2 and the fifth a tank B2b to fill the insulating gas filled between the tanks. Support the conductors 17 and 17b at the same time as the compartment, An insulator 14c is formed between the seventh tank C1 and the eighth tank C2, and between the eighth tank C2 and the ninth tank C3, the eighth tank C2c and the ninth a Insulators 13Ac and 13Bc are formed between the tanks C3c, respectively, and an insulator 5c is formed between the eighth tank C2 and the eighth tank C2c to fill the insulating gas filled between the tanks. A gas insulated switchgear for a three-phase bi bus, characterized in that the conductors (17 and 17c) are supported at the same time as the compartment. The method of claim 7, wherein The gas insulated switchgear of the three-phase double bus bar, characterized in that the enclosure of the first to ninth tank (A1 to C3c) is made of aluminum (Al).

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