JPH0799886B2 - Gas insulated switchgear - Google Patents

Description

TECHNICAL FIELD The present invention relates to a gas-insulated switchgear used in a power plant, a substation, or the like.

[Prior Art] FIG. 10 is a side view including a partial cross-sectional view showing a conventional gas-insulated switchgear disclosed in, for example, JP-A-60-147916. A single-line connection diagram is shown on the side view. Also listed. FIG. 11 is a view seen from the XI-XI direction of FIG. 10, FIG. 12 is a single wire connection diagram of the gas insulated switchgear shown in FIG. 10, and FIG. 13 is a simplified single wire connection diagram of FIG. It is a single line tangent diagram shown. In FIGS. 10 to 12, electric lines running from the two busbars (2) and (3) through the disconnectors (4) and (5) are connected to the lead conductor (9) on one side, and the lead conductor (9) is connected. The lower end of the can be grounded via a grounding switch (6). On the other hand, on the other hand, each is led to one end of the circuit breaker (1) through the lead conductor (91), is led out from the other end of the circuit breaker (1) by the lead conductor (101), and is then further connected to the ground switch ( 7) An electric circuit that can be grounded via a current transformer (8) for measuring instruments (current transformers for measuring instruments (8a, 8b, 8c) for each phase shown in Fig. 11) are arranged around the lead conductor ( It is branched to the electric line which is led to the line side via 10). The electric circuit led to the line side is connected to the voltage transformer (13) on the one hand through the disconnector (11), connected to the cable terminal (15) on the other, and further via the disconnector (12) on the other. It is connected to the lightning arrester (14). Electric power is supplied from the cable terminal (15) to the line side, that is, the customer (not shown). In the past, each of the above equipment was stored in a separate airtight container filled with insulating gas,
Each container was assembled to form a gas-insulated switchgear, but only busbars were used to meet market demands for improved reliability, that is, reduced accident rates, probability of preventive maintenance technology, or reduced installation area. The development of the three-phase all-in-one type and all three-phase all-in-one type including the circuit breaker and the disconnector has been working to reduce the size of the gas insulated switchgear. More recently, various devices have been combined and housed in one closed container. That is, as shown in FIGS. 10 and 12, a closed container (A) for a circuit breaker including a circuit breaker (1), a grounding switch (6, 7) and a current transformer (8) for an instrument, a bus bar ( 2) and a busbar closed container (B) including a disconnector (4), a busbar closed container (C) including a busbar (3) and a disconnector (5), a disconnector (11) and a cable terminal (15) It is housed in one closed container within a range that does not functionally hinder the closed container (D) including the line.

FIG. 14 is a perspective view showing details of the internal structure of the opening / closing mechanism of the closed container (A) for the circuit breaker. In the figure, the arc-extinguishing chamber (1a, 1b, 1c) of each phase of the circuit breaker (1) and the lead conductors (9a, 9b, 9c) and (10a, 10b, 10c) of each phase are located at the lower end of each. Ground switch for each phase (6a, 6b, 6c) and (7a, 7b, 7c)
Are all in the off state. Operating shaft (16-19), lever (20-35), link (36-39) and operating rod (40,4)
1) All are ground switches (6a, 6b, 6c) and (7a,
7b, 7c) is a member for driving the contacts (42 to 44) and (45 to 47) in the vertical direction in the figure to insert and disconnect. The operating shafts (48, 49), levers (50 to 52), links (53) and operating rods (54) are contacts (55 to 55) for each phase of the circuit breaker (1).
57) is a member for driving the vertical direction in the figure to insert and disconnect. In order to put the ground switches (6a), (6b) and (6c) in the ON state, the operation rod (40) is moved from the operation device (not shown).
The lower part of the figure, and draw the links (36,37) and levers (26,2).
7) Rotate the operating shaft (16, 17) in the counterclockwise direction in the figure to move the lever (20, 21), (22, 23) and (24, 2) respectively.
Push the contacts (42), (43) and (44) upwards in the figure via 5). Similarly, ground switches (7a), (7b)
In order to put (7c) and (7c) in the ON state, pull the operating rod (41) downward from the figure from the operating device (not shown), and use the links (38, 39) and levers (34, 35) to reverse the figure. Rotate the operating shaft (18, 19) clockwise and rotate the lever (28, 2) respectively.
9), (30,31) and (32,33) and then contact (4
Push 5), (46) and (47) upward in the figure. Further, in order to put the arc-extinguishing chambers (1a), (1b) and (1c) of the circuit breaker in the ON state, the operating rod (54) is pulled downward from the operating device (not shown) to move the lever ( 50-52) and the link (53), the operating shaft (48, 49) is rotated counterclockwise in the figure, and the contacts (55), (56) and (57) are pushed upward in the figure.

[Problems to be Solved by the Invention] In the conventional gas-insulated switchgear described above, as shown in FIG. 13, a current transformer for an instrument (8) has a line more than a breaker (1) in terms of maintainability. It is placed on the side (cable terminal (15) side), but wants to place the instrument AC (8) at the busbar side of the circuit breaker (1), that is, at the position indicated by the broken line in the figure,
Alternatively, there is a customer's desire to arrange the current transformer (8) for the meter in either of them, but it is difficult to arrange it on the bus bar side in the structure shown in FIGS. To respond, a closed container for circuit breaker (A)
There was a problem that it had to be increased.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to meet various customer demands without increasing the size of the gas-insulated switchgear and without complicating the internal structure. An object is to provide a switchgear.

[Means for Solving the Problem] A gas-insulated switchgear according to the present invention is a three-phase circuit breaker arranged substantially in parallel with each other on substantially the same plane (i) and parallel to the circuit breaker. A first group of lead conductors provided and arranged on substantially the same plane b as each other;
One end of each phase is connected to the upper end of the circuit breaker, and the second lead conductor group extending in the axial direction above the circuit breaker is provided in parallel with each of the circuit breakers, and is substantially the same as each other. Further, at least the third lead conductor group disposed on the plane c on the side opposite to the plane b with respect to the plane a, at least the second lead conductor group and the third lead conductor group. An instrument current transformer arranged on the outer periphery of each phase conductor of the second lead conductor group, a first grounding switch engaging with an end of each phase conductor of the first lead conductor group, and A second ground switch that engages with an end of each phase conductor of the third lead conductor group, and any one lead conductor group of the first lead conductor group and the third lead conductor group. A conductor group that connects the respective phase conductors and the other end of each phase of the second lead conductor group, and the first conductor group and And conductors for connecting the lower end of each phase conductor and the circuit breaker constituting the serial other conductor group of the third conductor group, in which a sealed container for housing the above components.

[Operation] In the present invention, the circuit breaker and the first to third lead conductors are arranged substantially on the same plane and parallel to each other, and one end of the circuit breaker is connected to the first lead conductor group and the third lead conductor group. The current transformer for measuring instruments is connected to any one of the group of lead conductors, and the end of the second group of lead conductors is connected to the other of them, so that the current transformer for instrument can be connected to the line side and the bus bar side. Alternatively, the arrangement of the circuit breaker and the earthing switch and the sealed container are compatible with each other.

[Embodiment] FIGS. 1 and 2 are side views including a partial cross-sectional view showing a gas-insulated switchgear of the present invention, and a single-line connection diagram is also shown on the side view. 3 and 4 are respectively the first
5 and FIG. 5, which are the views seen from the III-III direction and the IV-IV direction of FIG. 2 and FIG. 2, are the single wire connection diagrams of the gas insulation device shown in FIG. 1 and FIG. A single line connection diagram is shown. In FIG. 1 or FIG. 5, two busbars (2)
The electric paths from (3) and (3) to the disconnecting switches (4) and (5) are connected to the lead conductor (9), and one of the lower ends of the lead conductor (9) is grounded via the ground switch (6). And the other is connected to one end of the circuit breaker (1). From the other end of the circuit breaker (1), it is led out to the line side through a lead conductor (94) in which a current transformer for an instrument (8) is arranged around each phase, and a lead conductor (102), and a disconnector (11). ), And can be grounded via the installation switch (7) via the lead conductor (10). Since the line side connection after the disconnector (11) is the same as the conventional one, the same reference numerals are given and the description thereof is omitted. Two busbars (2) in FIG. 2 or FIG.
The electric circuits from (3) and (3) to the disconnecting switches (4) and (5) are connected to the lead conductor (9) on one side, and the lower end of the lead conductor (9) is grounded via the ground switch (6). You can do it. On the other hand, on the other hand, the lead conductor (93) and the current transformer (8) for the instrument, respectively.
Is guided to one end of the circuit breaker (1) through the lead conductor (94) arranged around each phase. From the other end of the circuit breaker (11) is led out by a lead conductor (103), and from there, a groundable electric path and a lead conductor (1).
0) and is led to the line side and branched to an electric circuit connected to the disconnector (11). Since the line side connection after the circuit breaker (11) is the same as the conventional one, the same reference numerals are given and the description thereof is omitted. As shown in FIG. 1 and FIG. 2, each of the above parts is a closed container (A) for a circuit breaker including a circuit breaker (1), a grounding switch (6, 7) and a current transformer (8) for a meter, Bus bar (2)
And a busbar closed container (B) including the disconnector (4), a busbar closed container (C) including the busbar (3) and the disconnector (5), and a disconnector (11) and a cable terminal (15). The closed container (D) on the line side is housed in one closed container within a range that does not hinder the function.

FIG. 9 is a perspective view showing details of the internal structure of the closed container (A) for the circuit breaker. Arc-quenching chamber (1) for each phase of circuit breaker (1)
a, 1b, 1c) are arranged in a straight line, that is, substantially on the same plane as shown in this figure and FIGS. 1 to 4, and similarly, the lead conductors (9a, 9b, 9c) of each phase are also arranged. And (10a, 10b, 10c)
Each phase grounding switch (6a, 6b, 6
c) and (7a, 7b, 7c) are also arranged in line with the lead conductors (9a, 9b, 9c) and (10a, 10b, 10c) of each phase. As shown in FIGS. 1 and 2, the lead conductor (94)
Are also aligned. In FIG. 9, the arc-extinguishing chambers (1a, 1b, 1c) of the respective phases of the circuit breaker (1) and the earthing switch (6
a, 6b, 6c) and (7a, 7b, 7c) are both in the off state. The operating shafts (58,59), levers (60 to 66,69 to 75), links (67,76) and operating rods (68,77) are all ground switch (6a, 6b, 6c) and It is a member for driving the contacts (42 to 44) and (45 to 47) of (7a, 7b, 7c) in the vertical direction in the figure to insert and disconnect. Operating shaft (78) and lever (79
˜84) are members for driving the contacts (55 to 57) of each phase of the circuit breaker (1) in the vertical direction in the figure to turn on and off. In order to put the ground switches (6a), (6b) and (6c) in the on state, the operating rod (68) is pulled downward from the operating device (not shown) to draw the link (67) and the lever (66). ), The operating shaft (58) is rotated in the counterclockwise direction in the figure, and the levers (60,61), (62,63) and (64,65) are respectively passed to the contacts (42), (43) and (44). ) Is pushed up in the figure. Similarly, in order to turn on the ground switches (7a), (7b) and (7c), the operating rod (7) is moved from the operating device (not shown).
7) Pull downwards in the figure, and link (76) and lever (75)
Rotate the operating shaft (59) in the counterclockwise direction in the figure via the contacts (45), (46) and (47) via the levers (69,70), (71,72) and (73,74) respectively. Push up in the figure. The arc-extinguishing chambers (1a), (1b) and (1
To put c) into the ON state, the operating shaft (78) is rotated counterclockwise from the operating device (not shown) and the contacts (55), (56) and (57) are respectively moved to the lever ( 79,8
0), (81, 81) and (83, 84) push upward in the figure.

In the single-line diagram shown in Fig. 13, the current transformer for measuring instrument (8)
1 is applied to the line side (shown by the solid line), and the structure shown in FIG. 2 is applied to the bus side (shown by the broken line). Further, the case where the current transformers (8) for instruments are installed on both the line side and the bus side will be described. FIG. 6 is a side view including a partial cross-sectional view similar to FIGS. 1 and 2. FIG. 7 shows VII-VII in FIG.
FIG. 8 is a view as seen from the direction, and FIG. 8 is a view in which only the arrangement of the current transformers for instruments is seen from the VIII-VIII direction in FIG. In FIG. 6, the electric paths from the two busbars through the disconnectors (4) and (5) are connected to the lead conductor (9) at one end, and the lower end of the lead conductor (9) is the ground switch (6). It can be grounded via. On the other hand, the lead conductor (93) and the instrument current transformer (80
2) is led to one end of the circuit breaker (1) through the lead conductor (94) arranged around each phase. Around each phase, an electric circuit that is led out from the other end of the circuit breaker (1) by a lead conductor (103) and can be grounded via the grounding switch (7) and a current transformer for an instrument (801). Via the lead conductor (10) arranged in the line and is branched to the electric line which is led to the line side and connected to the disconnector (11). The line side connection after the disconnector (11) is the same as in FIG. 1 or 2. Details of the opening / closing mechanism in the closed container (A) for the circuit breaker are also shown in FIG.
As shown in FIG. 7 and FIG. 8, the current transformers (802) for measuring instruments on the busbar side are arranged at the same height position in the closed container (A) for the circuit breaker for each phase. Since the current transformer (801) for the instrument on the side is a small distance between the phases of the lead conductor (10) (Fig. 6), the current transformer (801b) for the central phase is at the bottom, and the current transformers for other phases are at the bottom. The vessels (801a, 801c) are placed on the top. In this way, the instrument current transformers (801) and (802) can be arranged on both the line side and the bus side.

In addition, in FIGS. 1, 2 and 6, the closed container (A) for the circuit breaker has the same size.

[Effects of the Invention] As described above, according to the present invention, the circuit breaker, the first (bus line side) lead conductor group, and the third (line side) lead conductor group are parallel to each other in each phase. And connecting one end of the circuit breaker to any one of the first lead conductor group and the third lead conductor group, and the end portion of the second lead conductor group to the other of them. Since it is configured to be connected to the instrument, there is an effect that the same closed container for the circuit breaker can be arranged on the line side, the bus bar side, or both of the current transformers for instruments according to the customer's request. In addition, the connection mechanism for connecting and disconnecting the circuit breaker and the ground switch is also simplified, and there is an effect that an inexpensive gas-insulated switch device can be provided.

[Brief description of drawings]

1 and 2 are side views including a partial cross-sectional view showing a gas insulated switchgear according to an embodiment of the present invention, FIG. 3 and FIG.
The figure shows the direction III-III in FIG. 1 and the line IV-IV in FIG. 2, respectively.
FIG. 5 is a view seen from the direction, FIG. 5 is a single wire connection diagram of the gas-insulated switchgear of FIG. 1 or 2, and FIG. 6 includes a partial sectional view showing the gas-insulated switchgear according to an embodiment of the present invention. FIG. 7 is a side view, FIG. 7 and FIG. 8 are views seen from the VII-VII direction and VIII-VIII direction of FIG. 6, respectively, and FIG. 9 is an opening / closing mechanism in a closed container for a circuit breaker according to an embodiment of the present invention. A perspective view showing the details of FIG. 10, FIG. 10 is a side view including a partial sectional view showing a conventional gas-insulated switchgear, FIG. 11 is a view seen from the XI-XI direction of FIG. 10, FIG. 12 and FIG. FIG. 13 is a single wire connection diagram of the gas insulated switchgear of FIG. 10, and FIG. 14 is a perspective view showing details of a conventional opening / closing mechanism in a closed container for a circuit breaker. In the figure, (1) is a circuit breaker, (6) and (7) are grounding switches, (8) is a current transformer for instruments, (9), (10) and (9).
4) is a lead conductor, and (A) is a closed container for a circuit breaker. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenji Sasamori 8-1-1 Tsukaguchihonmachi, Amagasaki-shi, Hyogo Sanryo Electric Co., Ltd. Itami Works (56) Reference JP-A-61-173610 (JP, A) JP 62-110410 (JP, A)

Claims (1)

[Claims] 1. A three-phase circuit breaker arranged substantially in parallel with each other on the same plane B, and three-phase circuit breakers arranged in parallel with each other and arranged on substantially the same plane B with each other. First lead conductor group that is connected to the upper end of the circuit breaker, one end of each phase is connected, the second lead conductor group that is extended in the axial direction above the circuit breaker, and is parallel to the circuit breaker. A third lead conductor group, which is substantially the same as each other and which is arranged on a plane c on the side opposite to the plane b with respect to the plane a, the second lead conductor group and the above An instrument current transformer arranged at least on the outer periphery of each phase conductor of the second lead conductor group in the third lead conductor group and an end of each phase conductor of the first lead conductor group And a second contact that engages with the end of each phase conductor of the third lead conductor group. A switch, each phase conductor constituting any one lead conductor group of the first lead conductor group and the third lead conductor group, and the other end of each phase of the second lead conductor group And a conductor group that connects the phase conductors forming the other conductor group of the first conductor group and the third conductor group to the lower end of the circuit breaker, and the above-mentioned parts. A gas-insulated switchgear equipped with an airtight container that houses the.