JPS62272809A - Composite gas blast breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Purpose of the Invention] (Industrial Application Field) The present invention accommodates three-phase cut-off parts in one tank, and The present invention relates to a composite gas circuit breaker which is also provided with a work grounding device connected to both ends of the shutoff part.

(Prior art) In recent years, there has been a strong demand for ease of maintenance and inspection of gas-insulated switchgear and minimization of damage in the event of an accident. The need still exists. In response to these demands,
A composite gas insulated switchgear has appeared in which several components of the gas insulated switchgear are housed in the same metal container. Among these, there is a composite type gas circuit breaker that houses a circuit breaker and a work grounding device in the same container, and this composite type gas circuit breaker is incorporated into a composite type gas insulated switchgear as shown in the single line diagram in Figure 7. There are many cases.

FIG. 7 is a single-line diagram showing one line of a composite type insulated switchgear employing a one-stage multi-bus system. In FIG. 7, one pole side of the circuit breaker CB is connected to a cable contact 1 CH via a line disconnector DS3 and a line grounding device ES2. Further, the other pole side of the circuit breaker CB is connected to the main bus lines Bus1 and BUS2 via the main bus disconnect switches DS+ and DS2, respectively,
Working earthing devices ES+ and ES2 are connected to both pole sides of the circuit breaker CB.

In a combined type gas insulated switchgear having such a circuit configuration, the above-mentioned combined type gas circuit breaker stores the three-phase interrupting part of the circuit breaker CB and the working earthing devices ES+ and ES2 in the same tank. It is configured.

(Problems to be Solved by the Invention) However, in the double bus type gas insulated switchgear shown in FIG.
When BUS+ fails, it is necessary to cut off the power to one side bus BUS+ with circuit breaker CB and healthy bus disconnector DS2 open, and then repair the failed disconnector DS1. For this reason, it was necessary to maintain a power outage for one bus line BUS+ and this line for a long period of time.

In addition, since the work grounding devices ES+ and ES2 are normally placed at the top and bottom of the circuit breaker tank, this grounding device is led out of the tank by the upper and lower rotating seals, and is connected to the operation box by levers and links. The operating force transmission surface is connected to the

For this reason, the sealing part and the connecting part were arranged separately at the top and bottom of the tank, and manual opening and closing operations required a large amount of driving force.

An object of the present invention is to relate to a composite gas circuit breaker that has a simple structure and exhibits excellent operability and ease of recovery in the event of an accident, without increasing the installation area of the entire Cass insulation switchgear.

[Structure 1 of the Invention (Means and Effects for Solving Problems) The composite type cass breaker according to the present invention includes a three-phase interrupting section in the circuit breaker tank and electrically connected to both sides of this interrupting section. In a gas circuit breaker equipped with a work grounding device, the current-carrying conductor connecting the three-phase circuit breaker located in the circuit breaker tank and the main bus bar is electrically connected or disconnected as necessary. 3. A detachable conductor is provided, and a manhole for taking out or taking in the detachable conductor is provided at a position opposite to the detachable conductor of the circuit breaker tank.
According to the present invention, when a disconnector for a busbar breaks down, the conductor can be easily attached and detached from the inspection manhole, and the recovery time after an accident can be significantly shortened.

(Example) The present invention will be described below with reference to an example shown in FIGS. 1 and 2. In FIG. 1, the composite gas circuit breaker CB according to the present invention has a three-phase circuit breaker 1 in an upright sound link 10, and two work earthing devices ES+ and ES2 in the upper part of a tank 1. It is constructed by placing them together. That is, the working earthing device ES+ extends from one pole side of the circuit breaker 1 and faces the current-carrying conductor 2, and the working grounding device ES2 extends from the other pole side of the circuit breaker 1 and faces the current-carrying conductor 3. is placed opposite.

Furthermore, the main bus BUS is connected to the current-carrying conductor 2 on the bus bar side of the interrupting part 1.
+ and B (JS2) are connected via busbar disconnectors DS1 and DS2, respectively, and the current-carrying conductor 3 on the line side of the disconnection section 10 is connected to the universal expansion joint 4.
The line disconnector DS3 and the grounding device ES3 are connected to the cable connecting portion CH via their respective internal penetrating conductors.

Therefore, in the composite gas circuit breaker CB according to the present invention, the current-carrying conductor 2 on the busbar side and each main busbar Bus BtJ
A removable conductor 4 is connected to the Sz conductor as shown in Figure 4.
, 4. This detachable conductor 4.
4 is a hollow conductor having a window 5 as shown in FIG. 5, and connection or separation can be performed by attaching or removing a bolt 6 through the window 5. In addition, in order to perform attachment/detachment work on the attachable/detachable conductor 4.4 as necessary, the bus-side current-carrying conductor 2 of the sealed tank 10 and each main bus BUS
+, an inspection manhole 7 shown by a dotted line in FIG. 1 is provided on the side facing the connection with the BLJS2. The detachable conductors 4, 4 can be easily removed through the inspection manhole 7 through the window 5 of the hollow conductor.

Furthermore, in the first embodiment shown in FIG. 1, the working earthing devices ES+ and ES2 provided at the interrupting part 1@pin/v of the circuit breaker CB are connected to the current-carrying conductor 2 on the busbar side and the current-carrying conductor 3 on the line side, respectively. They are arranged facing each other and utilizing the space above the tank 10. This work grounding device ES1. According to the arrangement structure of the ES2, the operating force from the operation box 8 provided on the external side of the tank 10 is transmitted upward by the link 9, guided from the lever 11 into the tank 10 via the rotating rail part 12, The power is transmitted to both working earthing devices ES+ and ES2 via levers 13a and 13b on both sides arranged inside the tank 10.

In this structure, levers 13a and 13b on both sides
is installed in the gas in the sealed tank 10 to eliminate the influence of the atmosphere, and the number of rotary seal parts 12 can be reduced to one location, so the manual handle provided in the operation box 8 can be operated. It becomes possible to operate easily by reducing power.

Next, in the composite gas circuit breaker CB according to the present invention, the busbar side disconnector DS shown in FIGS. 1, 3, and 7
＋ fails, the circuit breaker CB and the remaining disconnector D
S2 is opened, and the main bus BUS+ and BUS2 are cut off. After that, the detachable conductor 4a on the live mother 11BUs+ side
is disassembled and removed from the inspection manhole 7, and the space in that area is used as a simple disconnect section. After removing the detachable conductor 4a, turn on the disconnector DS2 and the circuit breaker CB, and turn on the main bus B on one side.
Charge US2 and make use of this line. After that, by repairing the faulty disconnector DS+, the line downtime can be shortened.

Furthermore, in another embodiment of the present invention shown in FIG.
, 14b, and this outlet cylindrical portion 14a.

Current-carrying conductor 2 of circuit breaker CB passing through 14b and bidirectional bus bar BUS
+, connection conductors 15a, 15b (,
: The detachable conductors 4a and 4b@a are 2 digits respectively. In addition, hand holes 16a, 1 are provided in the outlet tube portions 14a, 14b in order to take out the detachable conductors 4a, 4b.
6b is provided.

In the embodiment shown in FIG. 6 as well, when the bus disconnect switch fails, removing the detachable conductor 4a or 4b simplifies the emergency restoration work procedure and shortens the restoration time in the event of failure. Can be done.

[Effects of the Invention] As described above, in the present invention, by providing a simple attachment/detachment device in the sealed tank of the circuit breaker, recovery work in the event of an accident can be performed easily and quickly. Furthermore, it becomes possible to omit the busbar attachment/detachment device between the circuit breaker and the main busbar, which significantly reduces the overall configuration.

[Brief explanation of the drawing]

Fig. 1 is a cutaway front view showing an embodiment of the composite gas circuit breaker of the present invention, Fig. 2 is a rear view of Fig. 1, and Fig. 3 is a cross-sectional view showing an embodiment of the composite gas circuit breaker of the present invention. Fig. 4 is a plan view showing the attaching part of the detachable conductor used in the present invention; Fig. 5 a and b is a front view and plan view showing the detachable conductor used in the present invention. 6 is a longitudinal sectional front view showing an embodiment of the present invention, and FIG. 7 is a single line diagram showing a general gas insulated switchgear. 1...Three-phase cutoff part 2...Bus bar side energizing conductor 3...Line side energizing conductor 4...Detachable conductor 7...Inspection manhole 8...Operation box 9...Link 11, 13...Lever 12...Rotating seal part 14...Outlet cylinder part 16...Hand hole BUS+, BUS2...Main bus DS+, DS2, DS3...Disconnector CB...Breaker ESl, ES2... Grounding device for work (8733) Agent: Yoshiaki Inomata, patent attorney (and others)
1 person) Figure 1 Whistle 2 Figure 8 Figure 4 CB Figure 6 Figure 5 Figure 7 8US2

Claims (4)

[Claims] (1) In a gas circuit breaker in which a three-phase interrupting section and a work grounding device electrically connected to both sides of the interrupting section are disposed in the circuit breaker tank, the three-phase interrupting section disposed in the circuit breaker tank is A removable conductor that can be electrically connected or disconnected as necessary is provided to the current-carrying conductor that connects the phase interrupting part and the main bus bar, and the removable conductor is provided at a position opposite to the removable conductor of the circuit breaker tank. A composite gas circuit breaker characterized by being provided with a manhole for taking out or taking in. (2) A composite according to claim 1, characterized in that a detachable conductor is provided on a current-carrying conductor in a circuit breaker tank, and an inspection manhole is further provided on a side surface of the circuit breaker tank facing the detachable conductor. Type gas circuit breaker. (3) A patent claim characterized in that a removable conductor is provided on a current-carrying conductor passing through an outlet tube on the side of the circuit breaker tank, and a hand hole is further provided in a position facing the current-carrying conductor in the outlet tube. A composite gas circuit breaker according to item 1. (4) In a gas circuit breaker in which a three-phase interrupting section and a work grounding device electrically connected to both sides of the interrupting section are disposed in the circuit breaker tank, the three-phase interrupting section disposed in the circuit breaker tank is A detachable conductor that can be electrically connected or disconnected as necessary is provided to the current-carrying conductor that connects the phase interrupting part and the main bus bar, and the detachable conductor is provided at a position opposite to the detachable conductor of the circuit breaker tank. A manhole is provided to take out or take in the work earthing devices, and the pair of work earthing devices are arranged on substantially the same plane above the circuit breaker tank, and the driving force for both work earthing devices is transmitted from the operation box to one rotary seal portion. 2. The composite gas circuit breaker according to claim 1, wherein the composite gas circuit breaker is configured to transmit data through the gas.