JP2777870B2 - Composite hermetic switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite hermetic switchgear.

[0002]

2. Description of the Related Art For example, in a substation facility, when a plurality of lines are drawn in, each line is connected to a transformer via a switching device such as a disconnector or a circuit breaker, and one of the lines is broken. Disconnect each line to a common bus so that power can be received and transmitted by switching to another line, or when checking or repairing any one of the lines, so that the load can be switched without interruption without interruption. The connection is made through a vessel.

[0003] Fig. 10 shows a circuit connection diagram (single line connection diagram), where M1 and M2 are lines drawn into substation facilities, and CM is a common bus line. A drop terminal 1 of each of the lines M1 and M2 is connected to a transformer 6 via a disconnector 2, circuit breakers 3, 4, and disconnector 5. A grounding device 7 is provided on the side of the lead-in terminal 1 of the disconnector 2, and a grounding device 8 is provided on the side of the transformer 6 of the disconnector 5.
Are connected and can be freely grounded.

Further, a connection point of the circuit breakers 3 and 4 is connected to a bus CM via a disconnector 9, and a grounding device 10 (manual grounding device) is provided on the circuit breaker 4 side of the disconnector 9, and a busbar is provided. A grounding device 11 is connected to the CM side so that it can be grounded freely. An instrument transformer 12 for extracting an input voltage for a protection relay is connected to the circuit breaker 4 side of the disconnector 9. A lightning arrester 14 is connected to the transformer 6 of the disconnector 5 via a disconnecting device 13. In addition, for any one of the three phases,
An instrument transformer 15 for voltage detection is connected.

[0005] Conventionally, to constitute a switchgear including such disconnectors, circuit breakers, grounding devices, instrument transformers and lightning arresters, these devices are individually configured,
They are installed individually. Therefore, there is a drawback that a large installation area is required, and there is a drawback that manufacturing costs are high because each device is manufactured individually.

[0006]

SUMMARY OF THE INVENTION The present invention comprises a switchgear comprising two circuit breakers, three disconnectors, four grounding devices, a transformer for an instrument and a lightning arrester as one device. It is an object of the present invention to reduce the installation area by reducing the size of the unit into a unit, and to reduce the manufacturing cost.

[0007]

SUMMARY OF THE INVENTION The present invention provides a first circuit breaker chamber for accommodating a first circuit breaker in which fixed electrodes are connected in series and a second circuit breaker for accommodating a second circuit breaker. A first disconnector connected to a movable electrode of the first circuit breaker inside the first circuit breaker chamber, the first disconnector being connected to the movable electrode side of the first circuit breaker chamber; A first disconnector chamber provided with a first grounding device connected to the first breaker chamber is connected to a fixed electrode side of the first circuit breaker chamber. A second disconnector chamber provided with second disconnectors to be connected and second and third grounding devices connected to both sides of the second disconnectors, the second disconnector chambers being connected to each other; The upper part on the fixed electrode side is provided with an instrument transformer for a film relay connected to the fixed electrode of the second circuit breaker and for taking out the protection relay input voltage, A third disconnector connected to the movable electrode of the second circuit breaker and a fourth grounding device connected to the third disconnector are provided inside the disconnector chamber on the movable electrode side. A third disconnector chamber is connected to the first disconnector chamber of at least one phase, and an instrument transformer for voltage detection is connected to the first disconnector, A lightning arrester connected to the third disconnector is provided on a side surface of the third disconnector chamber, and the first to third disconnectors are respectively connected to lead-in terminals connected to the outside. 1st and 2nd
Characterized in that the circuit breaker room, the lightning arrester, and the voltage transformer for voltage detection are mounted on a common mount.

[0008]

According to this structure, the circuit breaker, disconnector, instrument transformer and grounding device, which constitute the switchgear (portion surrounded by the broken line in FIG. 10) necessary for one phase of one line, are one complex. It is configured as a device and unitized. Therefore, the installation area required for installing these devices can be reduced as compared with the case where individual devices are individually installed. In addition, since each device is combined, the manufacturing cost is lower than when each device is manufactured individually.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG.
1 is a front view of the switchgear for one phase, FIG. 2 is a left side view of FIG. 1, FIG. 3 is a right side view of FIG. 1, FIG. 4 is a central left side view of FIG. Shows plan views of the circuit breaker chamber in section. Reference numeral 20 denotes a first circuit breaker room formed of a tank, for example, and is installed horizontally. A first circuit breaker 3 having a movable electrode 21 and a fixed electrode 22 therein.
Is stored. The movable electrode 21 is driven to open and close by a drive mechanism 23. The movable electrode 21 and the fixed electrode 22 are provided with contacts 24 and 25, respectively.

Reference numeral 26 denotes a second circuit breaker chamber which is formed of, for example, a tank, is also horizontally installed, and houses therein a second circuit breaker 4 having a movable electrode 27 and a fixed electrode 28. . The movable electrode 27 is driven to open and close by a drive mechanism 29. The movable electrode 28 is provided with a contact 30. Both circuit breaker chambers 20 and 26 are integrally connected and arranged, and both fixed electrodes 22 and 28 are connected to each other by a conductor 31 penetrating the connected portion. Note that both breaker rooms 2
0 and 26 are filled with an insulating gas.

The movable electrode 21 of the circuit breaker 3 in the circuit breaker room 20
In the upper part on the side, a first disconnector chamber 32 is provided,
In the upper part on the second side, second disconnector chambers 33 are integrally connected to each other so as to extend upward. Disconnector room 32
Accommodates a first disconnector 2 having a movable electrode 34 and a fixed electrode 35, and a first grounding device 7 that is detachably connected to the fixed electrode 35. The movable electrode 34 is connected to a conductor 36 inserted into the contact 24.

A current transformer 37 is mounted on the upper part of the disconnector chamber 32, and a bushing 38 is provided on the upper part thereof. The bushing 38 has a conductor 39 connected to the fixed electrode 35.
Are penetrated, and a lead-in terminal 1 is provided at the tip.

A second disconnector 9 having a movable electrode 40 and a fixed electrode 41 is provided inside the disconnector chamber 33, and a movable electrode 4 is provided.
Second grounding device (manual) that is detachably connected to 0
10 and a third electrode which is connected to the fixed electrode 41 so as to be detachable.
Are stored. The movable electrode 40 is connected to the fixed electrode 22 via a conductor inserted in the contact 25.
It is connected to the.

A current transformer 43 is mounted on an upper portion of the disconnector chamber 33, and a bushing 44 is provided on the upper portion thereof. The bushing 44 has a conductor 45 connected to the fixed electrode 41.
Are penetrated, and a lead-in terminal 46 is provided at the tip. The lead-in terminal 46 is connected to the bus CM.

The fixed electrode 28 of the circuit breaker 3 in the circuit breaker room 26
An instrument transformer 12 for a protection relay for extracting an input voltage for the protection relay is provided in an upper portion on the side end. The instrument transformer 12 is connected to the fixed electrode 28 of the circuit breaker 4 via the contact 30 and the conductor 66.

The movable electrode 27 of the circuit breaker 4 in the circuit breaker chamber 26
A second disconnecting switch 5 having a movable electrode 47 and a fixed electrode 48 and a fourth grounding device 8 that is detachably connected to the fixed electrode 48 are housed in the upper end on the side. A third disconnector chamber 49 is integrally provided so as to extend upward. The movable electrode 47 is connected to the movable electrode 27 via a contact 50 provided on the movable electrode 27 of the circuit breaker 4 and a conductor 51 inserted therein.

A current transformer 52 is mounted on an upper part of the disconnector chamber 49, and a bushing 53 is provided on the upper part thereof. The bushing 53 has a conductor 54 connected to the fixed electrode 48.
Are penetrated, and a lead-in terminal 55 is provided at the end. The drop terminal 55 is connected to the transformer 6. The interior of each disconnector chamber and bushing is filled with an insulating gas.

As shown in FIG. 3, a connecting pipe 56 extending in a direction perpendicular to the longitudinal direction of the circuit breaker chamber is provided continuously on a side surface of the disconnector chamber 49. One end of the conductor 57 in the connection pipe 56 is connected to the fixed electrode 48 of the disconnector 5, and the other end is connected to the surge arrester 14 via the disconnector 13.

The instrument transformer 15 provided in any one of the phases is connected to the disconnector 2 in the example shown in FIG. As shown in FIG. 2, a connection pipe 58 extending in a direction perpendicular to the longitudinal direction of the circuit breaker chamber is continuously provided on a side surface of the disconnector chamber 32. One end of a conductor 59 in the connection tube 58 is connected to the fixed electrode 35 of the disconnector 2,
An instrument transformer 15 is connected to the other end.

FIG. 6 is a connection diagram showing the connection state of each device described above. The switchgear shown in this connection diagram and FIGS. 1 to 5 shows one phase, and FIGS. 7 to 9 show the configuration of three phases. Circuit breaker room 20 for each phase,
The 26 mounting legs 60 are commonly supported by the base frame 61. The base frame 61 is supported by a gantry 67.

Reference numeral 62 denotes a driving device 2 for the first circuit breaker 3 of each phase.
3 is an operation box in which an operation device for operating the driving device 29 of the second circuit breaker 4 of each phase is stored, and 64 is an operation box in which an operation device for operating the driving device 29 of each phase is stored. An operation box in which an operation group for driving the disconnector is stored, and an operation box 65 in which an operation group for driving the grounding device of each phase is stored.

[0022]

As described above, according to the present invention, 2
Three circuit breakers, three disconnectors, four grounding devices, lightning arresters, and instrument transformers can be combined and configured as one device, so the installation area is circuit breaker, disconnector, grounding device,
The installation area required for separately installing the lightning arrester and the instrument transformer can be significantly reduced, and the manufacturing cost can be reduced as compared with the case of individually manufacturing.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention and showing a state in which a part is cut away.

FIG. 2 is a left side view of FIG.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a side view of a central portion of FIG. 1;

FIG. 5 is a plan view showing a cross section of the circuit breaker chamber of FIG. 1;

FIG. 6 is a connection diagram for one phase.

FIG. 7 is a plan view of the configuration shown in FIG. 1 having a three-phase structure.

FIG. 8 is a front view of FIG. 7;

FIG. 9 is a side view of FIG. 7;

FIG. 10 is a single-line diagram showing a connection state in a substation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drop-in terminal 2 1st disconnector 3 1st circuit breaker 4 2nd circuit breaker 5 2nd disconnector 7 1st grounding device 8 4th grounding device 9 2nd disconnector 10 2nd grounding Device 11 Third grounding device 12 Instrument transformer 14 Lightning arrester 15 Instrument transformer 20 First circuit breaker room 26 Second circuit breaker room 32 First disconnector room 33 Second disconnector room 49 Third Disconnector room 67 mount

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tadao Shirai 18th repair ceremony at Teradocho, Mukoichi-shi, Kyoto Stock Company Inoue Electric Works Co., Ltd. Inoue Electric Works Co., Ltd. (72) Inventor Seiji Yoshimura 18 repair service ceremony, Terado-cho, Mukoichi, Kyoto Prefecture Inoue Electric Works Co., Ltd. (56) References JP-A-62-31306 (JP, A) JP-A-7- 288906 (JP, A) JP-A-7-87637 (JP, A) JP-A-7-227017 (JP, A) JP-A-6-21307 (JP, U) JP-A-6-21308 (JP, U) Japanese Utility Model Application Sho 57-163116 (JP, U) Japanese Utility Model Application Hei 1-93903 (JP, U) Japanese Utility Model Application Hei 4-33239 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02B 13/00-13/075

Claims (1)

(57) [Claims] 1. A first device in which fixed electrodes are connected in series.
A first circuit breaker chamber accommodating the first circuit breaker and a second circuit breaker chamber accommodating the second circuit breaker. A first disconnector connected to a movable electrode of the first circuit breaker and a first disconnector chamber provided with a first grounding device connected to the first disconnector; A second disconnector internally connected to the fixed electrode of the first circuit breaker, and a second and a second disconnector connected to both sides of the second disconnector, above the fixed electrode side of the first circuit breaker chamber. 3
A second disconnector chamber provided with a grounding device of
A transformer for a protection relay connected to the fixed electrode of the second circuit breaker and for taking out a protection relay input voltage is provided above the fixed electrode side of the circuit breaker chamber of the second circuit breaker chamber; A third disconnector, which is internally connected to the movable electrode of the second circuit breaker and a fourth grounding device connected to the third disconnector, is provided above the movable electrode. A disconnector chamber is provided in series, and an instrument transformer for voltage detection is provided on a side surface of the first disconnector chamber of at least one phase and connected to the first disconnector; A lightning arrester connected to the third disconnector is provided on a side surface of the disconnector room,
The third to third disconnectors are respectively connected to drop-in terminals connected to the outside, and the first and second circuit breaker chambers, the lightning arrester and the transformer for voltage detection are mounted on a common mount. A complex hermetic switchgear.