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JP-7856906-B2 - Gas-insulated switchgear

JP7856906B2JP 7856906 B2JP7856906 B2JP 7856906B2JP-7856906-B2

Inventors

  • 劉 安▲宣▼
  • 堀越 和彦
  • 相馬 功
  • 吉原 淳
  • 砂川 寛

Assignees

  • 日新電機株式会社

Dates

Publication Date
20260512
Application Date
20230804

Claims (8)

  1. A gas-insulated switchgear in which an insulating gas is filled inside the enclosure and power is relayed through a path arranged in the atmosphere of the insulating gas, An opening/closing mechanism that opens and closes the current by moving a contact provided on one of the first and second contacts in the horizontal direction of the housing to make contact with or not make contact with the other of the first and second contacts, A partition section that separates the second container housing the opening and closing section from the first container on which the second container is placed, To insulate the conductor of the first contact arranged in the partition from the partition, an insulating spacer is attached to the partition, The partitioned portion has a foreign matter containment portion for containing foreign matter present inside the second container, located below at least a portion of the area in which the contact moves between the first contact and the second contact, in a gas-insulated switchgear.
  2. The aforementioned power relay method is a three-phase integrated type in which one phase is passed through each of the three paths that relay the power. The opening and closing section is provided for each phase, The gas-insulated switchgear according to claim 1, wherein the insulating spacer is composed of a single component that insulates the plurality of opening/closing sections from the partition section.
  3. The gas-insulated switchgear according to claim 1, wherein the housing has a multi-stage structure in which a second container is placed on top of a first container housing a circuit breaker, and a third container housing another circuit breaker is placed on top of the second container.
  4. The opening/closing section includes a first opening/closing section that opens and closes the input side of the busbar housed in the second container, and a second opening/closing section that opens and closes the output side of the busbar. The gas-insulated switchgear according to claim 1, wherein the foreign matter containment section contains the foreign matter below the first opening/closing section and the second opening/closing section.
  5. The opening and closing section is arranged such that, when viewed from the side, the contact takes a path that crosses the central axis of the partitioned section. The gas-insulated switchgear according to claim 1, wherein the insulating spacer is positioned at a location offset from the central axis in the direction of movement of the contact.
  6. The partitioned portion has an opening that exposes the insulating spacer attached to the partitioned portion to the inside of the second container. The gas-insulated switchgear according to claim 1, wherein the foreign matter containment portion is formed in a shape that surrounds at least a portion of the periphery of the insulating spacer along the opening.
  7. The gas-insulated switchgear according to claim 1, wherein the foreign matter containment section is a groove formed on the upper surface of the compartment.
  8. The gas-insulated switchgear according to claim 7, wherein the foreign matter containment section has a conductive member on at least a portion of the inner surface of the groove.

Description

This invention relates to a gas-insulated switchgear. Conventionally, as disclosed in Patent Document 1, gas-insulated switchgear in which the power receiving unit and the transformer unit are integrated is well known. This gas-insulated switchgear has a three-tiered structure, for example, with the power receiving unit container, busbar container, and transformer unit container arranged in that order from bottom to top. The conductors electrically connecting the power receiving unit container and the busbar container are insulated by insulating spacers separating these containers. Similarly, the conductors connecting the busbar container and the transformer unit are also insulated by insulating spacers separating these containers. Japanese Patent Publication No. 2006-109697 This is a perspective view of a gas-insulated switchgear according to one embodiment.This is a schematic diagram showing the configuration of a gas-insulated switchgear.This is a cross-sectional view showing the opening/closing mechanism in the open position.This is a cross-sectional view showing the opening/closing mechanism in the closed state.Figure 3 shows a cross-sectional view along the line V-V.This is an enlarged cross-sectional view of the opening/closing mechanism in the closed position.This is a cross-sectional view showing the configuration of a foreign object containment section in a different example.This is a cross-sectional view showing the configuration of a foreign object containment section in another example. An embodiment of this disclosure is described below. (Gas-insulated switchgear 1) As shown in Figure 1, the gas-insulated switchgear 1 comprises an MOF (Metal Obstruction Transformer) unit 2, a pair of power receiving transformer units 3, and an operation panel 4. The gas-insulated switchgear 1 has an insulating gas filling the inside of its housing 5. The insulating gas used is, for example, SF6 (sulfur hexafluoride). The gas-insulated switchgear 1 relays power through a path arranged in an atmosphere of insulating gas. The gas-insulated switchgear 1 is operated by an operator via the operation panel 4. The power receiving transformer unit 3 is a unit that integrates power receiving and transformer functions. The pair of power receiving transformer units 3 consist of one for regular use and the other for backup. The MOF unit 2 is positioned between the pair of power receiving transformer units 3. The MOF unit 2 measures the amount of power being relayed. The control panels 4, corresponding to each of the power receiving transformer units 3, are positioned in front of the gas-insulated switchgear 1. (Power receiving transformer unit 3) As shown in Figure 2, the power receiving transformer unit 3 has a structure in which the power receiving mechanism 8 and the transformer mechanism 9 are stacked vertically, with the connection mechanism 7, which is connected to the MOF unit 2, positioned in the middle. In this example, the power receiving mechanism 8 is positioned on the lower side and the transformer mechanism 9 is positioned on the upper side. Thus, the power receiving transformer unit 3 in this example has a multi-stage structure (in this example, a three-stage structure) in which the power receiving mechanism 8, connection mechanism 7, and transformer mechanism 9 are stacked from bottom to top. The power receiving mechanism 8 includes a current transformer CT, a cable head CHD, a surge arrester LA, a disconnector DS1, a grounding switch ES1, a circuit breaker GCB1, and a grounding switch ES2. The cable head CHD is provided at the end of the external cable 10 and connected to the disconnector DS1. The current transformer CT measures the current flowing through the external cable 10. The surge arrester LA protects the power receiving transformer unit 3 from abnormal voltages when an abnormal voltage is input to the power receiving transformer unit 3 from the cable head CHD. The disconnector DS1 opens and closes the power relay path in the power receiving mechanism 8. The grounding switch ES1 grounds the power relay path in the path of the disconnector DS1. The circuit breaker GCB1 switches the current on or off in the power receiving mechanism 8. The grounding switch ES2 grounds both ends of the circuit breaker GCB1 when it is closed during inspection of the circuit breaker GCB1. The connection mechanism 7 comprises a busbar (BUS) and a switching unit 12. In this example, the switching unit 12 includes a first switching unit 13 that opens and closes the input side of the busbar (BUS), and a second switching unit 14 that opens and closes the output side of the busbar (BUS). The first switching unit 13 and the second switching unit 14 are, for example, disconnectors that open and close the power relay path in the connection mechanism 7. The busbar (BUS) consists of a forward and reverse busbar connected to the MOF unit 2. The forward path of the busbar (BUS) has one end connected to the first switch 13 and the ot