JP-7856530-B2 - Power cable connection components, power cable connection structure, and power cable connection method

Inventors

• 風間 達也
• 田中 康博

Assignees

• 住友電気工業株式会社
• 日新電機株式会社

Dates

Publication Date

20260511

Application Date

20220906

Claims (8)

1. A power cable connector component for connecting a power cable to a bushing provided in power equipment, A cylindrical connecting member, The terminal portion provided at the end of the aforementioned power cable, Equipped with connection terminals, The aforementioned connecting member is A cylindrical part made of insulating material, The cylindrical portion has a first connection port and a second connection port that open at both ends , The cylindrical portion has a flange plate positioned on the end face through which the first connection port opens , The aforementioned terminal section is It has a first insertion area that fits into the first connection port, The first insertion region has an internal electrode connected to the cable conductor of the power cable and an insulating portion covering the internal electrode. The insulating portion has a flange portion that is fastened to the flange plate by bolts when the first insertion region is fitted into the first connection port. The aforementioned bushing is It has a second insertion area that fits into the second connection port, The second insertion region comprises a lead conductor and an insulating bushing that covers the lead conductor. The aforementioned connection terminal connects the internal electrode and the lead conductor with the first insertion area fitted into the first connection port and the second insertion area fitted into the second connection port. Components for connecting power cables.
2. A power cable connector component for connecting a power cable to a bushing provided in power equipment, A cylindrical connecting member, The terminal portion provided at the end of the aforementioned power cable, Equipped with connection terminals, The aforementioned connecting member is A cylindrical part made of insulating material, The cylindrical portion has a first connection port and a second connection port opening at both ends, The aforementioned terminal section is It has a first insertion area that fits into the first connection port, The first insertion region has an internal electrode connected to the cable conductor of the power cable and an insulating portion covering the internal electrode. The aforementioned bushing is It has a second insertion area that fits into the second connection port, The second insertion region comprises a lead conductor and an insulating bushing that covers the lead conductor. The aforementioned connection terminal connects the internal electrode and the lead conductor with the first insertion area fitted into the first connection port and the second insertion area fitted into the second connection port . The cylindrical portion is thicker in the middle section where the connecting terminals are located than at both ends, and its outer diameter decreases from the middle section towards both ends. Components for connecting power cables.
3. The power cable connection component according to claim 1 or claim 2 , wherein the cylindrical portion is made of silicone rubber.
4. The power cable connection component according to claim 1 or claim 2, wherein the shape of the terminal portion is L-shaped.
5. The power cable connection component according to claim 1 or 2, wherein each of the first connection port and the second connection port has a tapered surface whose inner diameter decreases toward the middle portion of the cylindrical part.
6. The power cable connection component according to claim 5 , wherein each of the first insertion region and the second insertion region has a tapered surface whose outer diameter decreases toward its respective tip.
7. Bushings installed in power equipment, A power cable connected to the bushing, A power cable connection component according to claim 1 or claim 2 , Power cable connection structure.
8. A method for connecting a power cable to a bushing provided on power equipment, A step of preparing the power cable connection component according to claim 1 or claim 2 , A step of preparing the power cable by attaching the terminal portion to the end of the power cable, A step of attaching the connection terminal to the internal electrode of the first insertion region in the terminal portion, or to the lead conductor of the second insertion region in the bushing, The process of fitting the first insertion area into the first connection port of the connecting member, The process includes fitting the second insertion area into the second connection port of the connecting member. How to connect power cables.

Description

This disclosure relates to power cable connection components, power cable connection structures, and power cable connection methods. Patent documents 1 and 2 disclose a solid-insulated busbar for connecting power equipment. This solid-insulated busbar comprises a conductor, terminals connected to the ends of the conductor, an insulating layer covering the outer circumference of the conductor, and a connection opening formed at the end of the insulating layer. The connection opening is into which the insertion area of a bushing provided on the power equipment is fitted. The connection opening is a recess formed by the insulating layer. The terminal is exposed within the connection opening. By inserting the bushing into the connection opening, the terminal and the conductor lead rod passing through the bushing are connected. Japanese Patent Publication No. 2018-195410Japanese Patent Publication No. 2019-204781 Figure 1 is a schematic diagram showing the configuration of a power cable connection structure according to an embodiment.Figure 2 is a schematic cross-sectional view showing an example of a connecting member provided in a power cable connection component according to an embodiment.Figure 3 is a schematic partial cross-sectional view showing an example of a terminal portion provided in a power cable connection component according to an embodiment.Figure 4 is a schematic diagram showing an example of a connection terminal provided in a power cable connection component according to the embodiment.Figure 5 is a schematic diagram showing another example of a connection terminal provided in a power cable connection component according to the embodiment.Figure 6 is a schematic diagram showing an example of the use of a power cable connection component according to the embodiment.Figure 7 is a schematic diagram showing another example of the use of the power cable connection component according to the embodiment. [Description of Embodiments in this Disclosure] First, the embodiments of this disclosure will be listed and described. (1) The power cable connection component according to the embodiment of this disclosure is a power cable connection component for connecting a power cable to a bushing provided on a power device, comprising a cylindrical connection member, a terminal portion provided at the end of the power cable, and a connection terminal. The connection member has a cylindrical portion made of an insulating material and a first connection port and a second connection port opening at both ends of the cylindrical portion, respectively. The terminal portion has a first insertion region that fits into the first connection port, and the first insertion region has an internal electrode connected to the cable conductor of the power cable and an insulating portion covering the internal electrode. The bushing has a second insertion region that fits into the second connection port, and the second insertion region has a lead conductor and an insulating bushing covering the lead conductor. The connection terminal connects the internal electrode and the lead conductor when the first insertion region is fitted into the first connection port and the second insertion region is fitted into the second connection port. The power cable connection component of this disclosure allows for easy connection of a power cable to power equipment. According to the power cable connection component of this disclosure, the first insertion area of the terminal portion and the second insertion area of the bushing are fitted into the first and second connection ports of the connection member, respectively. Therefore, the first and second insertion areas are held facing each other in the axial direction of the connection member. The axial direction of the connection member is from the first connection port to the second connection port. With the internal electrode of the first insertion area and the lead conductor of the second insertion area aligned axially with each other, the connection terminal connects the internal electrode and the lead conductor. (2) In the power cable connection component described in (1) above, the cylindrical portion may be made of silicone rubber. The configuration described in (2) above can improve the dielectric breakdown characteristics at the contact interface between each of the first and second insertion regions and the cylindrical portion. The cylindrical portion, made of silicone rubber, exhibits good adhesion to each of the regions, making it easy to ensure stable surface pressure at the contact interface. Therefore, even with low surface pressure at the contact interface, each region easily adheres to the cylindrical portion, making it easier to maintain good dielectric breakdown characteristics at the contact interface. (3) In the power cable connection component described in (1) or (2) above, the shape of the terminal portion may be L-shaped. The configuration described in (3) above allows the