JPH0676700A - Tank type gas-blast circuit breaker - Google Patents

Abstract

PURPOSE:To provide a tank type gas-blast circuit breaker in which a capacitor unit can easily be mounted and modified and which is excellent in earthquake- resisting performance and is not affected by pollution while in atmosphere. CONSTITUTION:An opening 23 is provided through part of a metallic tank 1 and is closed by a metallic closing member 24 in which a capacitor unit 25 having one terminal electrically connected to the inner surface of the member 24 is disposed. A capacitor-unit connecting member, comprising a first connection member 26 for electrically connecting either of conductors to the other terminal of the capacitor unit 25, a tulip contact 27 and a second connection conductor 28, is disposed in the metallic tank 1 when the opening of the tank is closed by the closing member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank type gas circuit breaker in which a capacitor is connected between a pole connected to a power transmission line and the ground for improving short circuit breaking performance.

[0002]

2. Description of the Related Art As the demand for electric power has increased, the short-circuit capacity of power transmission systems has also increased. Along with this, there is an increasing need for increasing the breaking capacity of power circuit breakers. However, most of these needs are in anticipation of future expansion of power supply equipment, and in most cases, a circuit breaker with a capacity smaller than the short-circuit breaking capacity required in the future is sufficient at this time. For this reason, when introducing a circuit breaker, consider the economy and, for example, when installing a new circuit breaker, short circuit breaking current 50
If the system is installed as a circuit breaker of kA and the short-circuit capacity of the system is increased by increasing the power supply in the future and the circuit breaker requires a capacity of 63 kA of short-circuit breaking current, the circuit breaker will be replaced by remodeling instead of updating. The method of upgrading the ability may be taken. In this case, not only is it economically advantageous to replace the circuit breaker, but there is an advantage that the capacity of the circuit breaker can be improved in a relatively short period of time. In order to improve the short-circuit breaking performance of the circuit breaker, the most important consideration is to improve the performance of the short-distance line fault breaking duty in which a transient recovery voltage with an extremely high rate of increase immediately after the current breaking is applied between the circuit breaker poles. Then, as a measure to improve short-distance line fault interruption performance, there is a method of installing a capacitor in parallel with a contact that opens when the circuit breaker performs an interruption operation, or a method of installing a capacitor between the pole connected to the transmission line and the ground. is there.

FIG. 14 shows, for example, Japanese Patent Laid-Open No. 59-139516.
FIG. 6 is a cross-sectional view showing a configuration of a conventional tank-type gas circuit breaker, which is disclosed in Japanese Patent Laid-Open Publication No. JP-A-2004-242242 and adopts a method of installing a capacitor in parallel with a contact. In the figure, 1 is a metal tank with both ends closed by covers 2 and 3 and filled with an insulating gas, 4, 5
Is a fixed contactor and a movable contactor which are arranged in the metal tank 1 so as to be able to come into contact with and separate from each other, and 6 and 7 are arranged on both covers 2 and 3 to insulate and support the fixed contactor 4 and the movable contactor 5, respectively. A fixed-side insulating support cylinder and a movable-side insulating support cylinder, 8 is a capacitor unit electrically connected between the contactors 4 and 5 via mounting plates 9 and 10, and 11 and 12 are both contactors at one end. 4, 5 and the other end is bushing conductor 1
3 and 14 are connection conductors respectively connected to 3 and 14 to form a current path.

FIG. 15 shows, for example, Japanese Unexamined Patent Publication No. 1-10535.
FIG. 6 is a cross-sectional view showing the configuration of a conventional tank-type gas circuit breaker, which is disclosed in Japanese Patent Publication No. JP-A-2003-242242, and in which a method of installing a capacitor between a pole connected to a power transmission line and the ground is adopted. In the figure,
The same parts as those of the tank type gas circuit breaker shown in FIG. Reference numeral 15 denotes a movable contactor and a fixed contactor housed therein, which electrically insulates the movable side and the fixed side from each other, and mechanically connects the interelectrode insulating support cylinders, and 16 and 17 denote both bushing conductors 13 and 14, respectively. Bushings that respectively support 18 is a terminal plate 19 whose one end is electrically connected to the bushing conductor 13 connected to the transmission line.
The capacitor unit is connected to the bushing mounting flange 20 whose other end is electrically connected to the metal tank 1.

Further, FIG. 16 shows, for example, Japanese Patent Laid-Open No. 62-17.
It is a figure which shows the structure of an example of the conventional tank type gas circuit breaker shown by 7822 publication. In the figure, reference numeral 21 is a capacitor unit connected between the terminal plates 19 and 20 which are arranged at the tips of both bushings 16 so as to be electrically connected to both bushing conductors (not shown).

As described above, each of the capacitor units 8, 18, 21 has the structure shown in FIGS. 14, 15, 16 respectively.
As a result of the installation of a short-distance line fault cutoff, the high rate of rise applied between both contacts of the breaker immediately after the current cutoff due to the round-trip reflection of the voltage distributed in the transmission line immediately before the current cutoff. Delay time t _d = C _P × Z _l (where C _{P is} the capacitance of the capacitor,
(Z _l : Surge impedance of the transmission line), the interruption performance is improved.

Next, a method of mounting each capacitor unit installed with the configuration shown in FIGS. 14, 15 and 16 will be described. First, since the capacitor unit 8 of the tank type gas circuit breaker shown in FIG. 14 is arranged in the vicinity of both contacts 4 and 5 and electrically connected in parallel with both contacts 4, 5, When the capacitor unit 8 is attached, the cover 2 is opened and the work is performed in the metal tank 1, or the entire blocking portion including both contacts 4 and 5 is made into the metal tank 1.
, The capacitor unit 8 is attached, and then stored again in the metal tank 1.

Further, the capacitor unit 18 of the tank type gas circuit breaker shown in FIG. 15 is arranged at the base of the bushing 16 and the terminal plate 19 arranged at the tip of the bushing 16 on the side connected to the power transmission line. Bushing mounting flange 2
The capacitor unit 18, which has been assembled in advance, is mounted by lifting with a heavy machine such as a crane. Further, the capacitor unit 21 of the tank type gas circuit breaker shown in FIG. 16 is pre-assembled between both terminals 19 and 22 arranged at the respective tips of both bushings 16 and 17 as in the case of FIG. The condenser unit 18 that has been installed is hoisted and attached using a heavy machine such as a crane.

[0009]

Since each conventional tank type gas circuit breaker is constructed as described above, in the case of the tank type gas circuit breaker shown in FIG. After carrying out the dismantling work inside the manufactured tank 1, it is necessary to bring it back to the factory where the working environment is controlled and carry out the modification, which requires the same field work period and time as the replacement of the circuit breaker. There was a problem that was required.

Further, in the case of the tank type gas circuit breaker shown in FIG. 15, the mounting of the capacitor unit 18 does not involve the work in the gas atmosphere unlike the case of FIG. On the contrary, the capacitor unit 18
Is placed in the air, so both bushings 16 and 17
The insulation strength corresponding to the insulation performance is required, the capacitor unit 18 becomes large and the seismic performance is deteriorated, and the air insulation part is unavoidably soiled, so maintenance work for maintaining the insulation performance is increased. There was a problem.

Further, in the case of the tank type gas circuit breaker shown in FIG. 16, the mounting of the capacitor unit 21 is relatively easy except for work at a high place, but like the case of FIG. 15, the capacitor unit 21 is mounted. Since it is placed in the air, an insulation strength equivalent to the insulation performance of both bushings 16 and 17 is required, the capacitor unit 21 becomes large and seismic performance deteriorates, and the air insulation part is prevented from being soiled. Therefore, there is a problem that maintenance work for maintaining insulation performance is increased.

The present invention has been made in order to solve the above problems, and it is easy to install and modify the capacitor unit, has excellent seismic performance, and is a tank-type gas shutoff that is not affected by pollution in the atmosphere. The purpose is to provide a container.

[0013]

[Means for Solving the Problems] Claim 1 according to the present invention
The tank-type gas circuit breaker consists of a metal tank that is grounded and filled with an insulating gas, a pair of contacts that come into contact with and separate from each other, and conductors that are respectively connected to these contacts, and the metal tank is insulated inside the tank. In a tank-type gas circuit breaker configured to include a supported breaker, an opening is provided in a part of a metal tank, and a capacitor unit, to which one terminal is electrically connected, is arranged inside the opening. It is closed by a metal blocking member provided, and a capacitor unit connecting member for electrically connecting either one of the conductors and the other terminal of the capacitor unit in the metal tank when the blocking member is closed. It is arranged.

The tank type gas circuit breaker of claim 2 is the tank type gas circuit breaker of claim 1 in which an opening is formed in the vicinity of a portion of the blocking portion requiring maintenance and inspection.

Further, in the tank type gas circuit breaker of the third aspect of the present invention, a body tube which is grounded and a metal tank which is made of a branch tube which branches from the body tube to the transmission line side and which is filled with an insulating gas, are provided with each other. In a tank-type gas circuit breaker, which comprises a pair of contacting elements that come into contact with and separate from each other, and a blocking section that is electrically connected to both of these contacting elements and is insulated and supported in the body tube of the metallic tank, An opening is provided in a part of the pipe, and the opening is closed by a metal closing member provided with a capacitor unit to which one terminal is electrically connected to the inner surface, and a branch of the metal tank. A capacitor unit connecting member is provided in the pipe for electrically connecting one of the conductors and the other terminal of the capacitor unit when the closing member is closed.

Furthermore, a tank type gas circuit breaker of a fourth aspect is the tank type gas circuit breaker of any one of the first to third aspects, in which the capacitor unit connecting member is first biased by a spring force. First to overcome the contact piece and the spring force
And a second contact piece that comes into contact with the contact piece.

[0017]

In the capacitor unit of the tank type gas circuit breaker according to the present invention, one terminal is electrically connected to the inner surface of the closing member that closes the opening, and the capacitor unit connecting member is the closing member. When one of the conductors is closed, one of the conductors is electrically connected to the other terminal of the capacitor unit.

[0018]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1 is a sectional view showing the structure of a tank type gas circuit breaker according to a first embodiment of the present invention. In the figure, FIG.
The same parts as those of the conventional tank type gas circuit breaker shown in FIG. Reference numeral 23 is an opening formed in the lower portion of the metal tank, 24 is a metallic closing member that is detachably disposed in the opening 23 and closes the opening 23, 2
Reference numeral 5 denotes a capacitor unit projectingly provided on the inner surface of the closing member 24, one terminal of which is electrically connected to the closing member 24. As shown in FIG.
Are housed in capacitor tubes 25b made of an insulating material in a number corresponding to the voltage duty, and are pressed by one side by a spring 25c, whereby the ceramic capacitor elements 25a are electrically connected in series. A mounting screw hole 25d is formed on the side where the spring 25c is arranged. 26 is a mounting screw hole 25 on the other terminal side of the capacitor unit 25.
First fixed with a shield 26a around it
Connection conductor, 27 is a tulip contact fixed to the tip of the first connection conductor 26, and 28 is a fixed contactor 4.
A second connecting conductor that is electrically connected to the tulip contact 27 and that can be fitted into the tulip contact 27, and has a shield 28a provided around the second connecting conductor.

In the capacitor unit 25 in the tank type gas circuit breaker configured as described above, one terminal is connected to the ground through the closing member 24 and the other terminal is the first terminal.
Connection conductor 26, tulip contact 27, second connection conductor 28, connection conductor 11 and bushing conductor 13
It is connected to the power transmission line side via the to improve the short-circuit breaking performance.

Next, the operation of mounting the capacitor unit 25 in the first embodiment constructed as described above will be described. First, the closing member 24 is removed, and the capacitor unit 25, the first connecting conductor 26, and the tulip contact 27, which are integrally assembled in advance, are attached to the inner surface thereof. Then, after the second connecting conductor 28 is attached to the blocking portion side in the metal tank 1, the opening portion 23 is closed again by the closing member 24, whereby the attaching work is completed.

In the above work, the attachment of the capacitor unit 25 to the closing member 24 is easy at the site, but it is necessary to prepare in advance a factory in which the closing unit 24 and the like are assembled into the closing unit 24 and the like. If replaced, the work time in the field can be further shortened, and the reliability of the insulation performance, which is considered to be affected by the work environment, can be improved. Further, as shown in FIG. 2, a large number of ceramic capacitor elements 25a are connected in series to form the capacitor unit 25, so that the high withstand voltage performance of the ceramic makes it possible to reduce the size, and at the same time, the ceramic capacitor element 25 can be manufactured in a small quantity. Since the product can be manufactured at low cost, the cost of the capacitor unit 25 can be reduced.

Example 2. Although the closing member 24 is formed in the shape of a plate in the first embodiment, if the closing member 29 having a bottomed cylindrical shape is applied as shown in FIG. 3, the capacitor unit 25 becomes large. Even if it becomes difficult to store it in the metal tank 1, it can be easily attached by appropriately increasing the length of the cylinder.

Example 3. 4 is a sectional view showing the structure of a tank type gas circuit breaker according to a third embodiment of the present invention, and FIG. 5 is a sectional view showing the structure of the mounting portion of the capacitor unit in FIG. In the figure, the same components as those in the first embodiment shown in FIG.
Reference numeral 30 is a fixing bracket for fixing the capacitor unit 25 to the cover 2, 31 and 32 are connecting conductors and shields fixed to the tip of the capacitor unit 25, and 33 is a fixed side conductor electrically connected to the fixed contactor 4 side. A tulip contact 34 fitted to the connection conductor 31 is fixed to the tip.

In the capacitor unit 25 in the tank type gas circuit breaker configured as described above, one terminal is connected to the ground through the fixing metal fitting 30 and the cover 2, and the other terminal is connected to the connection conductor 31 and the tulip contact 3.
4, the fixed side conductor 33, the connection conductor 11 and the bushing conductor 13 are connected to the transmission line side to improve the short-circuit breaking performance.

Next, the work for mounting the capacitor unit 25 in the third embodiment constructed as described above will be explained. First, the cover 2 is removed, and the inner surface of which the capacitor unit 25, the connecting conductor 31, and the shield 32 are integrally assembled on the fixing metal fitting 30 in advance is attached via the fixing metal fitting 30. And
After the fixed-side conductor 33 having the tulip contact 34 fixed to the tip end is attached to the shut-off portion side in the metal tank 1, the cover 2 is incorporated into the metal tank 1 again to complete the attachment work.

According to the third embodiment, the same effect as in the first embodiment can be obtained, and the capacitor unit 25 is attached to the cover 2.
As shown in FIG. 3, it is not necessary to bother to provide the opening 23 in a part of the metal tank 1 and to close the metal tank 1 with the closing member 24, which is structurally simplified and the metal tank 1 can be easily manufactured.

Example 4. In the third embodiment, the structure in which the connecting conductor 31 is fixed to the capacitor unit 25 side and the tulip contact 34 is fixed to the fixed conductor 33 side has been described, but as shown in FIG.
Even if the connecting conductor 35 is fixed to the fixed conductor 33 side and the tulip contact 36 is fixed to the capacitor unit side via the connecting conductor 37, the same effects as those of the third embodiment can be obtained, as a matter of course. Since most of the members are attached to the cover 2 side, the work in the metal tank 1 is reduced and the work is facilitated.

Example 5. In addition, in the third embodiment described above, the case where the number of the capacitor units 25 is one has been described.
As shown in FIG. 5, even if a plurality of capacitor units 25 are placed on the fixing metal fittings 30 and the connecting conductors are fixed to the connecting metal fittings 38 arranged across the respective capacitor units 25, the fourth embodiment will be described. Similar effects can be obtained.

Example 6. 8 is a sectional view showing the structure of a tank type gas circuit breaker according to Embodiment 6 of the present invention, and FIG. 9 is a sectional view showing a section taken along line IX-IX in FIG. In the figure, 39 is an inspection port provided on the side of the metal tank 1, which is provided for attaching and detaching the connecting conductor 12. Reference numeral 40 denotes a closing member that closes the inspection port 39, and the condenser unit 25 is arranged on the inner surface of the closing member 40 with the same configuration as in each of the above-described embodiments.

According to the sixth embodiment, the capacitor unit 25 is attached to the closing member 40 of the inspection port 39 which is provided in advance for attaching / detaching the connecting conductor 12. As in the case of 4 and 5, it is not necessary to purposely provide an opening in a part of the metal tank 1, and the structure is simplified. Further, even if a new opening is provided, the inspection port 39 can be omitted by forming the opening in the vicinity of the portion requiring maintenance and inspection.

Example 7. FIG. 10 is a sectional view showing the structure of the main part of a tank type gas circuit breaker according to a seventh embodiment of the present invention,
FIG. 11 is a sectional view showing details of the capacitor unit mounting portion in FIG. In the figure, the same parts as those in the above-mentioned respective embodiments are designated by the same reference numerals, and the description thereof will be omitted. 41 is a branch pipe 1 that branches from the metal tank 1 to the bushing 17 side
An opening 42 formed in a part of a is a closing member that closes the opening 41, and a condenser unit 25 is provided on the inner surface as in the above embodiments. 43 is a holder having one end fixed to the bushing conductor 14 and the other end holding a spring member 44, and 45 is always biased by the spring member 44 toward the capacitor unit 25 side and guided by the holder 43 in the biasing direction. A second contactor (not shown) that is a slidable first contactor and is formed on the tip side of the capacitor unit 25 when the closing member 42 is closed, and a spring member 44.
It is in the state of being pressed by the urging force of.

According to the seventh embodiment, since the capacitor unit 25 is arranged in the branch pipe 1a which branches from the metal tank 1 to the bushing 17, the high temperature gas generated when the capacitor unit 25 cuts off the current is removed. Since there is no influence, and the electric contact between the bushing conductor 14 side and the capacitor unit 25 is made by the biasing force of the spring member 44, a more reliable contact state is obtained and the reliability is improved. Can be planned.

Example 8. FIG. 12 is a sectional view showing the structure of the main part of a tank type gas circuit breaker according to an eighth embodiment of the present invention,
FIG. 13 is a cross-sectional view showing details of the capacitor unit mounting portion in FIG. In the figure, the same parts as those in the above-mentioned respective embodiments are designated by the same reference numerals, and the description thereof will be omitted. Reference numeral 46 denotes a second metal tank disposed on the same axis as the metal tank 1, and 47 denotes an opening formed in a part of the second metal tank 46. It is provided for attaching and detaching both conductors 48, 49 which are connected to the cutoff portion and constitute a current path. Reference numeral 50 denotes a closing member that closes the opening 47, and the tulip contact 36 and the connecting conductor 3 are provided on the inner surface, for example, as in the case of the fourth embodiment shown in FIG.
7 and the capacitor unit 25 are attached via a fixing bracket 30, and a connecting conductor 35 fitted into a tulip contact 36 is fixedly provided on the conductor 49 side.

According to the eighth embodiment described above, since the capacitor unit 25 is arranged in the second metal tank 46 different from the metal tank 1, the capacitor unit 25 is operated in the same manner as in the seventh embodiment. It is not affected by the high temperature gas generated at the time of interruption, and since the conductor 49 and the capacitor unit 25 are connected to each other, there is no need to perform any processing on the interruption part, so it is the same as a circuit breaker. Since it can be applied, standardization is possible.

[0035]

As described above, according to the first aspect of the present invention, the metal tank filled with the insulating gas and grounded, the pair of contacts that come in contact with and away from each other, and the two contacts are respectively connected. In a tank type gas circuit breaker composed of a conductor made of a conductor and insulated and supported in a metal tank, an opening is provided in a part of the metal tank, and the opening is provided with one terminal on the inner surface. Is closed by a metal closing member in which a capacitor unit electrically connected is disposed, and when one of the conductors and the other terminal of the capacitor unit is closed in the metal tank when the closing member is closed. A capacitor unit connecting member for electrically connecting the capacitor is provided, and according to claim 2, the opening is formed in the vicinity of a portion of the shutoff portion requiring maintenance and inspection according to claim 1, and further, To three If it is a metal tank that is filled with an insulating gas and consists of a body tube that is grounded and a branch tube that branches from this body tube to the transmission line side, a pair of contacts that come in contact with and separate from each other, and both of these contacts. In a tank-type gas circuit breaker composed of a conductor to be connected and which is insulated and supported in the body tube of a metal tank, an opening is provided in a part of the branch pipe of the metal tank and Is closed with a metal closing member in which a capacitor unit having one terminal electrically connected to the inner surface is disposed, and one of the conductors is placed inside the branch pipe of the metal tank when the closing member is closed. And a capacitor unit connecting member for electrically connecting the capacitor unit and the other terminal of the capacitor unit, and according to claim 4, in the capacitor unit according to any one of claims 1 to 3. Since the connecting member is composed of the first contact piece that is urged by the spring force and the second contact piece that overcomes the spring force and comes into contact with the first contact piece, mounting and modification of the capacitor unit is easy. Thus, it is possible to provide a tank-type gas circuit breaker that has excellent earthquake resistance and is not affected by pollution in the atmosphere.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of a tank type gas circuit breaker according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the configuration of the capacitor unit shown in FIG.

FIG. 3 is a sectional view showing a configuration of a tank type gas circuit breaker according to a second embodiment of the present invention.

FIG. 4 is a sectional view showing the structure of a tank type gas circuit breaker according to a third embodiment of the present invention.

5 is a cross-sectional view showing a configuration of a mounting portion of the capacitor unit shown in FIG.

FIG. 6 is a cross-sectional view showing a configuration of a mounting portion of a capacitor unit of a tank type gas circuit breaker according to a fourth embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a configuration of a mounting portion of a capacitor unit of a tank type gas circuit breaker according to a fifth embodiment of the present invention.

FIG. 8 is a sectional view showing the structure of a tank type gas circuit breaker according to a sixth embodiment of the present invention.

9 is a cross-sectional view showing a cross section taken along line IX-IX in FIG.

FIG. 10 is a sectional view showing the structure of a tank type gas circuit breaker according to a seventh embodiment of the present invention.

11 is a cross-sectional view showing a configuration of a mounting portion of the capacitor unit shown in FIG.

FIG. 12 is a sectional view showing the structure of a tank type gas circuit breaker according to an eighth embodiment of the present invention.

13 is a cross-sectional view showing a configuration of a mounting portion of the capacitor unit shown in FIG.

FIG. 14 is a sectional view showing a configuration of an example of a conventional tank-type gas circuit breaker.

FIG. 15 is a cross-sectional view showing the configuration of another example of a conventional tank-type gas circuit breaker.

FIG. 16 is a cross-sectional view showing the configuration of still another example of a conventional tank-type gas circuit breaker.

[Explanation of symbols]

 1 Metal Tank 1a Branch Pipe 4 Fixed Contact 5 Moving Contact 8, 18, 21, 25 Capacitor Unit 11, 12 Connection Conductor 13, 14 Bushing Conductor 16, 17 Bushing 23, 41, 47 Opening 24, 29, 40 , 42, 50 Closing member 26 First connection conductor 27, 34, 36 Tulip contact 28 Second connection conductor 39 Inspection port 44 Spring member 46 Second metal tank

Claims (4)

[Claims] 1. A grounded metal tank filled with an insulative gas, a pair of contacts that come into contact with and separate from each other, and conductors respectively connected to these contacts, and are insulated and supported in the metal tank. In a tank type gas circuit breaker configured with a shut-off part, a metal-made closing member that is detachably disposed in the opening and is formed in a part of the metal tank and that closes the opening. A capacitor unit disposed inside the metal tank of the closing member and having one end side electrically connected to the closing member; and a capacitor unit electrically connected to either one of the conductors when closing the closing member. A tank-type gas circuit breaker comprising a capacitor unit connecting member arranged so as to be electrically connectable to the other end side of the capacitor unit. 2. The tank-type gas circuit breaker according to claim 1, wherein the opening is formed in the vicinity of a portion of the blocking section that requires maintenance and inspection. 3. A metal tank, which is filled with an insulating gas and is composed of a body tube that is grounded, a branch tube that branches from the body tube to the transmission line side, a pair of contacts that come in contact with and separate from each other, and both contacts. A tank-type gas circuit breaker comprising a conductor that is connected to each child and is insulated and supported in the body tube of the metal tank, and an opening formed in a part of the branch pipe of the metal tank. Section, a metal closing member that is detachably disposed in the opening and closes the opening,
A capacitor unit disposed inside the metal tank of the closing member and having one end side electrically connected to the closing member, and the capacitor when the closing member is closed by being electrically connected to either one of the both conductors. A tank type gas circuit breaker comprising a capacitor unit connecting member arranged so as to be electrically connectable to the other end side of the unit. 4. The capacitor unit connecting member includes a first contact piece urged by a spring force, and a second contact piece that overcomes the spring force and contacts the first contact piece. The tank type gas circuit breaker according to any one of claims 1 to 3.