JPS608415Y2 - Connection structure of insulated lead wires for stationary induction appliances - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a connection structure for insulated lead wires that can be disconnected and reconnected for use in stationary induction electric appliances such as transformers and accelerators.

For example, in a large-capacity transformer installed in an electric power system, as shown in Fig. 1, a main body 2 consisting of an iron core and a winding part is housed in a tank 1, and a bushing 4 is attached to a bushing pocket 3 attached to the tank 1. Bushing 4 and main body 2
The winding portions thereof are connected by an insulated lead wire 5 standing approximately vertically.

Since such a transformer is large in size, the bushing pocket 3 is removed and transported separately to accommodate the limited dimensions during transportation, and then reassembled at the site.

In order to facilitate disassembly and reassembly at this time, the insulated lead wire has a structure in which it can be disconnected from the connecting portion 6 and reconnected.

However, the connecting portion of the conventional insulated lead wire is simply tightened with a bolt or the like so that it can be disconnected and reconnected, and is insulated by wrapping a thick layer of insulating paper thereon.

Therefore, it takes a considerable amount of time to connect and insulate the parts, and if reassembly is carried out on-site in an environment that is not completely dust-proof and moisture-proof, serious defects may occur in the insulation parts.

The present invention was developed in view of the above circumstances, and allows the connection parts to be freely disconnected and reconnected without removing the insulating parts or re-insulating them during disassembly and reassembly during transportation, and it is possible to do so depending on the external conditions. The object of the present invention is to provide a connection structure for insulated lead wires for stationary induction appliances that is unaffected and highly reliable.

FIG. 2 shows the connection structure of the insulated lead wire of the present invention, which corresponds to the insulated lead wire 5 shown in FIG. The insulated lead wire 12 on the bushing side is connected to the main body part (not shown) and has a conductor 12a attached to the end like the bushing side lead wire 11. It is detachably connected to the end of the lead wire 11 on the bushing side in the axial direction by a connector portion 14.

Cylindrical shields 15 and 16 are provided on the connector sides of the insulated leads 11 and 12 to concentrically surround the lead wires, respectively, and curved portions 17 for mitigating the electric field are formed on the opposite sides of the shields. The diameter is reduced and the wire is fitted integrally with the lead wire.

Also, insulated lead wires 11 are attached to the outer peripheries of the shields 15 and 16, respectively.
．． Insulating layers 18 and 19 that are continuous with the 12 insulating layers are integrally formed, and their opposing end surfaces touch each other together with the shield curvature section 16 in the lead wire connection state, so as to surround and insulate the connection section from the outside. .

When connecting the insulated lead wires 11 and 12, it is enough to align their axes and fit and connect the connector part 14, and when disconnecting, the shield can be separated together by pulling out one of them in the axial direction. .

According to the present invention configured as described above, the connecting portion of the insulated lead wires 11 and 12 is provided in the shield 15.1 provided in the insulating layer.
6, and can be disconnected and reconnected without removing or reinsulating the insulating parts, making disassembly and reassembly of the transformer etc. easy and quick.

Therefore, even during on-site reassembly, insulation is guaranteed and reliability is improved without being affected by environmental conditions.

Note that the present invention is not limited to insulated lead wires for transformers, etc., but can also be applied to insulated lead wires in containers to which wall bushings are removably attached, for example.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a general stationary induction appliance, and FIG. 2 is a sectional view showing an embodiment of an insulated lead wire connection structure for a stationary induction appliance according to the present invention. 11.12...Insulated lead wire, 13...
・Connector part, 14, 15... Shield, 16
......Curvature part, 17, 18...Insulating layer. Figure 2

Claims (1)

[Scope of utility model registration request] A first insulated lead wire connected to a main body portion in the tank, and a bushing that is attached to the tank and disassembled during transportation, the end of which is connected to the end of the first insulated lead wire through a connector portion. A second insulated lead wire that is detachably connected in the axial direction and a second insulated lead wire that is provided concentrically surrounding the connector side ends of the first and second insulated lead wires, each having a curved portion at the opposite end and facing each other. A separable separable device whose opposite end has a reduced diameter and is fixed to the lead wire and has an insulating layer coated on the outside, and whose end surfaces touch each other to surround and insulate the connected portion when the lead wires are connected. 11. A connection structure for an insulated lead wire for a stationary induction appliance, characterized by comprising a second shield.