Gas insulation switch cabinet

Abstract

The utility model provides a gas insulation switch cabinet, one end of a cable assembly (4) can be electrically connected to a moving contact (11) from the outside of a bus chamber (1), the other end of the cable assembly (4) is used for connecting a sensor voltage transformer (5), the cable assembly (4) comprises an elbow-shaped cable joint (41) and a cable (42), the elbow-shaped cable joint (41) is provided with a first conductor and a second conductor which are perpendicular to each other, and the cable (42) is connected with the first conductor and the second conductor. The first conductor is electrically connected with the second conductor, the first conductor is used for being electrically connected to a moving contact (11), and the second conductor is used for being connected to a cable (42). In this way, the length between the cable and the voltage transformer can be short, the cost can be saved, and the space can be saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of switch cabinet, especially a gas insulated switch cabinet. BACKGROUND

[0002] Gas insulated switchgear (GIS) has been widely used in power systems. Its structure is compact, small footprint, high reliability and easy to install, in addition, its configuration is more flexible, can meet the different needs of customers.

[0003] The gas insulated switchgear needs to monitor the voltage in the process of use, for example, monitor the voltage difference between two phases. In the prior art, the cable line is vertically inserted into the gas insulated switchgear and electrically connected to the conductor of one phase to monitor the voltage of the phase. However, due to the large bending radius of the cable line, it needs a long cable line to connect to the voltage transformer. SUMMARY

[0004] Therefore, the utility model provides a kind of gas insulated switchgear, and each phase of the gas insulated switchgear corresponds to include:

[0005] Bus chamber, it includes bus chamber and three-position switch in the bus chamber, the three-position switch has one movable contact and two static contacts, the movable contact can be contacted with two static contacts by rotating respectively;

[0006] Circuit breaker chamber, which is in communication with the bus chamber, the bus chamber and the circuit breaker chamber are filled with insulating gas;

[0007] Cable chamber, which is connected to the circuit breaker chamber;

[0008] One end of the cable assembly can be electrically connected to the movable contact from the outside of the bus chamber, the other end of the cable assembly is used to connect the voltage transformer, the cable assembly includes an elbow cable joint and a cable line, the elbow cable joint has a first conductor and a second conductor perpendicular to each other, the first conductor is electrically connected to the second conductor, the first conductor is used to be electrically connected to the movable contact, and the second conductor is used to be connected to the cable line.

[0009] In the utility model, the elbow cable joint is arranged to connect the cable and the conductor in the bus chamber, so that the length between the cable line and the voltage transformer is shorter, thereby saving cost and space.

[0010] According to the gas insulated switchgear, optionally, the busbar chamber comprises a barrel and a barrel cover, a sleeve is vertically arranged in the barrel cover, one end of the sleeve is connected to the movable contact in the barrel, and the other end of the sleeve is connected to the first conductor. The electrical connection with the external cable assembly is realized by fixing the base to the sleeve, which is convenient for installation and monitoring the voltage condition of the phase.

[0011] According to the gas insulated switchgear, optionally, a sealing ring is arranged between the barrel and the barrel cover. In this way, the sealing performance can be maintained, and the cost is low.

[0012] According to the gas insulated switchgear, optionally, the movable contact comprises a base and a blade, the base is fixed to the sleeve, and the blade is rotatably connected to the base.

[0013] According to the gas insulated switchgear, optionally, the barrel comprises a barrel body and an extension barrel, the extension barrel is located between the barrel body and the barrel cover, and the distance between the end of the base towards the barrel cover and the barrel cover is smaller than the distance between the barrel body and the barrel cover. In this way, without changing the structure of the barrel body and the three-position switch, a shorter cable can be used to realize the connection between the movable contact and the voltage transformer.

[0014] According to the gas insulated switchgear, optionally, the gas insulated switchgear further comprises the cable assembly or the elbow cable joint.

[0015] According to the gas insulated switchgear, optionally, the cable chamber comprises:

[0016] The barrel body is used to connect the cable;

[0017] The connecting barrel is connected between the circuit breaker chamber and the barrel body, and the current transformer can be sleeved on the connecting barrel.

[0018] According to the gas insulated switchgear, optionally, further comprising: a grounding row connected to each corresponding circuit breaker chamber and grounded. The structure is simple, and the safety of the workers can be ensured.

[0019] According to the gas insulated switchgear, optionally, the gas insulated switchgear further comprises a support frame, the support frame is used to carry the circuit breaker chamber, and the voltage transformer is arranged on the support frame. In this way, the space utilization can be improved.

[0020] According to the gas insulated switchgear as described above, optionally, the gas insulated switchgear corresponds to two phases, each phase is provided with one busbar chamber, one circuit breaker chamber and one cable chamber, and each phase corresponding cable assembly is connected to the voltage transformer. BRIEF DESCRIPTION OF DRAWINGS

[0021] The preferred embodiments of the present application will be described in detail below with reference to the drawings, so that the above and other features and advantages of the present application can be more clearly understood by those skilled in the art. In the drawings:

[0022] Figure 1 It is a structural schematic view of the gas insulated switchgear according to an embodiment of the present application.

[0023] Figure 2 It is a structural schematic view of the cable assembly connected to the movable contact.

[0024] Figure 3 It is a schematic view of the split structure of the cable assembly and the barrel cover.

[0025] In the drawings, the reference signs are as follows:

[0026] 1 - busbar chamber

[0027] 11 - movable contact

[0028] 111 - base

[0029] 112 - blade

[0030] 12 - barrel

[0031] 121 - original barrel

[0032] 122 - extension barrel

[0033] 13 - barrel cover

[0034] 2 - circuit breaker chamber

[0035] 3 - cable chamber

[0036] 31 - body barrel

[0037] 32 - connecting barrel

[0038] 4 - cable assembly

[0039] 41 - elbow cable joint

[0040] 42 - cable wire

[0041] 5 - voltage transformer

[0042] 6 - bushing

[0043] 7 - grounding bar

[0044] 8 - support frame DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following examples further explain the utility model in detail. The nouns and pronouns about people in the patent application are not limited to specific gender.

[0046] The utility model provides a kind of gas insulated switchgear, it generally corresponds two-phase or three-phase, here phase refers to several wires connected to power system, for example two-phase indicates two wires connected to power system, three-phase indicates three wires connected to power system. The structure corresponding to each phase of gas insulated switchgear is used to connect the wire of each phase in power system. In the utility model, voltage transformer can be connected to the structure corresponding to each phase of gas insulated switchgear to monitor the voltage of the corresponding structure of this phase. More specifically, the monitoring here can be the monitoring of the voltage of the structure corresponding to this phase itself, or the monitoring of the voltage difference between two phases, which can be selected according to actual needs, and will not be described here.

[0047] As shown in Figures 1 to 3 In the utility model, each phase of gas insulated switchgear corresponds to busbar room 1, circuit breaker room 2 and cable room 3. Among them, busbar room 1 is located above circuit breaker room 2, and cable room 3 is located below circuit breaker room 2. For the gas insulated switchgear corresponding to two phases, the voltage between the two phases can be monitored, and for the gas insulated switchgear corresponding to three phases, the voltage of each phase can be monitored. Figures 1 to 3 The case where the gas insulated switchgear corresponds to two phases is shown in the middle.

[0048] Among them, busbar room 1 includes busbar room 1 and three-position switch in busbar room 1, three-position switch has one moving contact 11 and two static contacts (not shown in the figure), moving contact 11 can contact two static contacts by rotating. One of the two static contacts is an isolation static contact, and the other is a grounding static contact. Moving contact 11 will contact or separate from the two static contacts by rotating to reach three positions, which are respectively closed position, open position and grounding position. In the closed position, moving contact 11 and isolation static contact are in contact, and the external circuit connected to the gas insulated switchgear is in conduction; in the open position, moving contact 11 is separated from isolation static contact and grounding static contact, and the external circuit connected to the gas insulated switchgear is disconnected; in the grounding position, moving contact 11 and grounding static contact are in contact, and the three-position switch is grounded. The three-position switch can be realized by using existing three-position switch, and the specific will not be described here. The working principle of the three-position switch belongs to the prior art, which will not be described here. The busbar room 1 is a sealed structure, which is filled with insulating gas.

[0049] The circuit breaker chamber 2 is in communication with the busbar chamber 1, and the circuit breaker chamber 2 is also a sealed structure and is filled with insulating gas.

[0050] The cable chamber 3 is connected to the circuit breaker chamber 2.

[0051] In order to monitor the physical properties of each phase, the cable assembly 4 can be connected to the conductor in the busbar chamber 1, and the cable assembly 4 can also be connected to the voltage transformer 5. Figures 1 to 3 As an exemplary illustration, one end of the cable assembly 4 can be electrically connected to the movable contact 11 from the outside of the busbar chamber 1, and the other end of the cable assembly 4 is used to connect the voltage transformer 5, so that the voltage of the phase can be obtained.

[0052] The cable assembly 4 includes an elbow cable joint 41 and a cable wire 42, the elbow cable joint 41 has a first conductor and a second conductor which are perpendicular to each other, the first conductor is electrically connected to the second conductor, the first conductor is used to be electrically connected to the movable contact 11, and the second conductor is used to be connected to the cable wire 42. Figures 1 to 3 The first conductor and the second conductor can be made of copper. In order to be safe, the outer sides of the first conductor and the second conductor can be provided with an insulating shell, the first conductor and the second conductor are arranged on the inner side of the insulating shell,

[0053] In the utility model, the elbow cable joint 41 is arranged to realize the connection between the cable and the conductor in the busbar chamber 1, so that the length between the cable wire 42 and the voltage transformer 5 is short, and the cost and the space can be saved.

[0054] Optionally, the busbar chamber 1 comprises a barrel 12 and a barrel cover 13, a bushing 6 is vertically arranged in the barrel cover 13, one end of the bushing 6 is connected to the movable contact 11 in the barrel 12, and the other end of the bushing 6 is connected to the first conductor. The bushing 6 can be a C-type bushing. In the present example, the first conductor is connected to the movable contact 11 through the bushing 6. The part of the bushing 6 outside the barrel cover 13 is used to connect to the first conductor in the elbow cable joint 41, and the part of the bushing 6 inside the barrel cover 13 is connected to the movable contact 11. More specifically, the movable contact 11 comprises a base 111 and a blade 112, the base 111 is fixed to the bushing 6, and the blade 112 is rotatably connected to the base 111. The electrical connection with the external cable assembly 4 is achieved by fixing the base 111 to the bushing 6, which not only facilitates installation, but also facilitates monitoring of the voltage of the phase. In order to maintain the sealing performance, a sealing ring can also be arranged between the barrel 12 and the barrel cover 13, which has a lower cost.

[0055] Optionally, the barrel 12 comprises a main barrel 121 and an extension barrel 122, the extension barrel 122 is located between the main barrel 121 and the barrel cover 13, and the distance between the end of the base 111 towards the barrel cover 13 and the barrel cover 13 is less than the distance between the main barrel and the barrel cover 13. For the part of the base 111 higher than the main barrel, the base 111 is covered by the extension barrel 122. The height of the extension barrel 122 can be determined according to the height of the base 111 and the height of the bushing 6, so that a shorter cable 42 can be used to achieve the connection between the movable contact 11 and the voltage transformer 5 without changing the structure of the main barrel 121 and the three-position switch.

[0056] Optionally, the gas insulated switchgear further comprises the cable assembly 4 or the elbow cable joint 41 described above. For example, the elbow cable joint 41 can be arranged on the gas insulated switchgear, and the cable 42 is provided by the user, and the presence of the elbow cable joint 41 facilitates the connection of the user. Of course, the manufacturer can also configure all the cable assemblies 4 for the gas insulated switchgear, which can be selected according to actual needs.

[0057] Optionally, the cable chamber 3 comprises a main barrel 31 and a connecting barrel 32, the connecting barrel 32 is connected between the circuit breaker chamber 2 and one main barrel 31, and the current transformer can be arranged in the connecting barrel 32; the main barrel 31 is used to connect a cable (not shown in the figure), which is used to connect to the equipment of the customer. Figure 1The connecting cylinder 32 is used to connect the body cylinder 31 and the circuit breaker chamber 2, so that the height of the body cylinder 31 from the ground can be adjusted. The current transformer can also be sleeved on the connecting cylinder 32 to monitor the current of the phase. The connecting cylinder 32 can be in communication with the circuit breaker chamber 2, which can also be filled with insulating gas. The body cylinder 31 is electrically connected to the circuit breaker chamber 2 through the connecting cylinder 32.

[0058] Optionally, the gas insulated switchgear further comprises a grounding bar 7 connected to each corresponding circuit breaker chamber 2 and grounded. Figure 1 As can be seen from the figure, one grounding bar 7 is connected to the housings of the two circuit breaker chambers 2 respectively. Since the circuit breaker chamber 2, the busbar chamber 1 and the cable chamber 3 are connected to each other, and the housings are all conductors, the grounding of the three chambers can be realized by connecting the circuit breaker chambers through one grounding bar 7, which is simple in structure and ensures the safety of the workers.

[0059] Optionally, the gas insulated switchgear further comprises a support frame 8 for bearing the circuit breaker chamber 2, and the voltage transformer 5 is arranged on the support frame 8. Specifically, as shown in Figure 1 The circuit breaker chamber 2 is fixed on the support frame 8, which can be achieved by bolts or reinforcing ribs, and will not be described here. Due to the existence of the elbow cable joint 41, the bending radius of the cable 42 is small, and the cable 42 itself can be short, so the voltage transformer 5 can also be arranged on the support frame 8, as shown in Figure 1 The voltage transformer 5 is arranged on one side of the circuit breaker chamber 2, which can improve the space utilization. As an example, since Figure 1 In the figure, an example is that the gas insulated switchgear corresponds to two phases, and each phase is provided with one busbar chamber 1, one circuit breaker chamber 2 and one cable chamber 3. The cable assembly 4 corresponding to each phase is connected to the voltage transformer 5, so that the voltage between the two phases can be monitored through the voltage transformer 5, so that whether the gas insulated switchgear fails can be found in time.

[0060] Optionally, the grounding bar 7 can also be connected to the support frame 8 to realize grounding through the support frame 8.

[0061] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. Gas-insulated switchgear, characterized in that Each phase of the gas insulated switchgear corresponds to comprising: a busbar chamber (1) comprising a busbar chamber (1) and a three-position switch in the busbar chamber (1), the three-position switch having one movable contact (11) and two static contacts, the movable contact (11) being capable of contacting the two static contacts respectively by rotating; a circuit breaker chamber (2) in communication with the busbar chamber (1), the busbar chamber (1) and the circuit breaker chamber (2) being filled with insulating gas; a cable chamber (3) connected to the circuit breaker chamber (2); characterized in that one end of a cable assembly (4) is electrically connected to the movable contact (11) from outside the busbar chamber (1), the other end of the cable assembly (4) being used for connecting a voltage transformer (5), the cable assembly (4) comprising an elbow cable joint (41) and a cable wire (42), the elbow cable joint (41) having a first conductor and a second conductor perpendicular to each other, the first conductor being electrically connected to the second conductor, the first conductor being used for electrical connection to the movable contact (11), and the second conductor being used for connection to the cable wire (42).

2. The gas insulated switchgear according to claim 1, characterized in that The busbar chamber (1) comprises a barrel (12) and a barrel cover (13), a sleeve (6) being vertically arranged in the barrel cover (13), one end of the sleeve (6) being connected to the movable contact (11) in the barrel (12), and the other end of the sleeve (6) being connected to the first conductor.

3. The gas insulated switchgear according to claim 2, characterized in that A sealing ring is arranged between the barrel (12) and the barrel cover (13).

4. The gas insulated switchgear of claim 2, wherein, The movable contact (11) comprises a base (111) and a blade (112), the base (111) being fixed to the sleeve (6), and the blade (112) being rotatably connected to the base (111).

5. The gas insulated switchgear of claim 4, characterized in that, The barrel (12) comprises a primary barrel (121) and an extension barrel (122), the extension barrel (122) being located between the primary barrel (121) and the barrel cover (13), and the distance between one end of the base (111) towards the barrel cover (13) and the barrel cover (13) being less than the distance between the primary barrel (121) and the barrel cover (13).

6. The gas insulated switchgear of claim 1, wherein, The gas insulated switchgear further comprises the cable assembly (4) or the elbow cable joint (41).

7. The gas insulated switchgear of claim 1, wherein, The cable chamber (3) comprises: a body barrel (31) for connecting a cable; a connecting barrel (32) connected between the circuit breaker chamber (2) and the body barrel (31), a current transformer being capable of being sleeved in the connecting barrel (32).

8. The gas insulated switchgear of claim 1, wherein, Further comprising: a grounding row (7) connected to each corresponding circuit breaker chamber (2) and grounded.

9. The gas insulated switchgear according to any one of claims 1-8, characterized in that, The gas insulated switchgear further comprises a support frame (8) for bearing the circuit breaker chamber (2), and the voltage transformer (5) is arranged on the support frame (8).

10. The gas insulated switchgear of claim 9, characterized in that, The gas insulated switchgear corresponds to two phases, each phase being provided with one busbar chamber (1), one circuit breaker chamber (2) and one cable chamber (3), and each corresponding cable assembly (4) being connected to the voltage transformer (5).

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