JP2000224747A - Terminal connecting part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance connection to a closed apparatus with ease of use and attain size reduction and high workability, by connecting the front end conductor of an L type connecting terminal part and the front end conductor of an I type terminal connecting part by means of a connecting conductor. SOLUTION: An L type connecting terminal 1 is disposed and fixed onto the side surface 55 of an apparatus by means of a bolt 14 through a mounting flange 13. An I type terminal connecting part 20 is fixed onto the bottom 56 of the apparatus adjacent to the apparatus side surface 55 on which the L type connecting terminal part 1 is disposed by means of a bolt 34 through a mounting flange 32. Three sets of a pair of the L type terminal connecting part 1 and I type terminal connecting part 20 are disposed side by side on the respective apparatuses for three-phase cable connection, the each phase of which has two lines, along the side surface 55 and the bottom 56 of the respective apparatuses. Connecting materials 100, 200 of two lines of cables of respective phases are attached to a pair of L type terminal connecting part 1 and I type terminal connecting part 20. When pressure test is carried out on the respective cables, the attachment to connecting holes 12, 14 (electric application opening) formed at the L type terminal connecting part 1 provides high workability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal connection which can be suitably used when connecting hermetically sealed devices with a cable line, for example, when connecting a gas insulated switchgear (GIS) to a gas insulated transformer. It is about the department.

[0002]

2. Description of the Related Art As shown in FIG. 2, when a hermetically sealed device is connected to each other by a cable line 50, for example, when a gas-insulated switchgear (GIS) 51 is connected to a gas-insulated transformer 52, A withstand voltage test of the cable line 50 and the like is required, and for that purpose, a so-called L-shaped gas terminal connection portion 1 including an electrode portion and two cable insertion ports, and one cable insertion port serving as a power supply port. Is used. An example is shown in FIG.

[0003] A conventional L-shaped in-gas terminating connection part 1 is roughly L-shaped.
An internal conductor 2 having a shape is provided, and a T-shaped bushing 4 made of epoxy resin is integrally formed around the internal conductor 2. A conductive paint 5 is applied to the outer surface of the bushing 4.

The internal conductor 2 is composed of a horizontal conductor 2A and a vertical conductor 2B, and the bushing 4 is also formed of a horizontal bushing 4A and a vertical bushing 4B.

[0005] The horizontal conductor portion 2A disposed on the horizontal portion 4A of the bushing 4 has a distal end protruding outside from one side of the horizontal bushing portion 4A to form a connection conductor 6, and is used to connect a sealed device. Is electrically connected to Vertical conductor 2
B and the vertical bushing portion 4B are respectively provided with connection holes 8 and 10 in a direction orthogonal to the axial direction of the horizontal conductor portion 2, and a cable-side connection material (connection end portion) 100 is attached.

The cable-side connection material 100 has a prefabricated structure, and includes connection terminals (plugs and multi-lambands) 102 formed at the distal end of the cable 50, a stress cone 103, a press fitting 104, a compression device 105, and a cable protection fitting. 106 and the like, and connecting holes 8, 10
And the connection terminal 102 is electrically connected to the vertical conductor 2B. The configuration of the cable-side connection material 100 is not limited to this.

The cable-side connection material 100 is fixed to the terminal connection portion 1 by attaching the protective fitting 106 to a lower end portion of the vertical bushing 4B with a bolt 107.

On the side of the horizontal conductor 2A opposite to the tip connection conductor 6, connection holes 12 and 14 are formed in the horizontal conductor 2A and the horizontal bushing 4A in a horizontal direction coinciding with the axial direction of the horizontal conductor 2A. Are formed, and the connection holes 12 and 14 form power supply ports for testing the cable connected to the terminal connection. Usually, a pre-mold insulator (insulation plug) 300 is attached to this power application port as shown in the figure. The insulating plug 300 is detachably attached by fixing the lid 301 to the end of the bushing with a bolt 302. At the time of power application, the insulating plug 300 is removed, and a connection material (connection portion) of the power application cable is attached.

[0009]

The above-mentioned L-shaped gas terminal connection section 1 is very effective because various characteristics tests of cables or equipment can be performed from the power application port of the terminal connection section.

On the other hand, a three-phase cable having a single-phase two-wire configuration may be used to transmit and receive a large amount of power. In this case, two L-shaped cables are used for each phase (R, S, T). A gas end connection 1 is required. For this purpose, conventionally, as shown in FIG. 4, six L-shaped in-gas end connection portions 1 (1R, 1R; 1S, 1S; 1T, 1T) are arranged in a line on the side surfaces of the devices 51, 52. Is being done. However, in this configuration, the size (W) of the device becomes large, which is against the downsizing of the sealed device.

[0011] Alternatively, as shown in FIG.
Steps are formed on the side surfaces of the first and second 52, and three end terminations 1 (1R, 1S, 1T) in gas are formed in two rows (A, B) on the step.
Placement has been done.

However, in this configuration, the gas inlet terminal 1 (1R, 1S, 1T) is not provided with a power application port, and when performing a withstand voltage test on a cable line or the like,
It is necessary to attach a terminal box exclusively for power application to the equipment. or,
At this time, it is necessary to attach and detach the cable at the lower part of the steps of the devices 51 and 52, and there is a problem in workability.

Accordingly, an object of the present invention is to connect a three-phase cable of one phase and two rows to a sealed device with good operability, and furthermore, the power supply port is integrally provided, so that the device can be made compact and work can be performed. An object of the present invention is to provide a terminal connection part which can improve the performance.

[0014]

The above object is achieved by a termination connection according to the present invention. In summary, the present invention has an inner conductor in which a horizontal conductor portion and a vertical conductor portion are integrally formed, and a bushing integrally formed of resin around the inner conductor, One end of the conductor portion protrudes outward from the bushing to form a tip conductor, and the other end of the horizontal conductor portion is provided with a power application port, and a cable connection is made to the vertical conductor portion and the vertical bushing from below. An L-shaped terminal connection portion to which a material can be connected, a vertically extending inner conductor, and a bushing integrally formed of resin around the inner conductor, and at one end of the inner conductor Comprises a tip conductor projecting outwardly from the bushing, and the inner conductor and the bushing having an I-shaped terminal connection portion to which a cable connection material is connectable from below.
The terminal conductor of the L-shaped terminal connection portion and the terminal conductor of the I-shaped terminal connection portion are connected by a connecting conductor.

According to one embodiment of the present invention, the L-shaped terminal connection is mounted on a side surface of a sealed device, and the I-shaped terminal connection is mounted on a bottom surface of the sealed device adjacent to a side surface of the sealed device. Mounted.

According to another embodiment of the present invention, three sets of the L-shaped terminal connection section and the I-shaped terminal connection section constituting the terminal connection box are provided, and each of the three-phase cables having a single-phase and double-row configuration is provided. The connection material is connectable.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a terminal connecting portion according to the present invention.

FIG. 1 shows an embodiment of the termination connection section of the present invention. The terminal connection according to the present invention includes an L-type terminal connection 1 and an I-type terminal connection 20. The L-shaped connection terminal 1 is arranged on the side surface 55 of the device, and is attached with bolts 14 via its attachment flange 13. Also, I-type terminal connection 2
Reference numeral 0 is attached to the bottom surface 56 of the device adjacent to the device side surface 55 on which the L-shaped connection terminating portion 1 is arranged, with the bolt 34 via the mounting flange 32. Each device is provided with a side 55
And along the bottom surface 56, a pair of L-shaped terminal connections 1 and I
Three sets of the shape termination connection portions 20 are juxtaposed.

Since the L-shaped terminal connecting portion 1 has the same configuration as the L-shaped terminal connecting portion described with reference to FIG. 3, members having the same configuration and operation are denoted by the same reference numerals. Detailed description is omitted. However, in the present invention, the connection conductor 6 of the L-shaped terminal connection portion 1 is connected to the connection conductor 4 disposed inside the device.
0 of the connecting conductor 40
Is electrically connected to Next, the I-type terminal connection section 20
Will be described.

In this embodiment, the I-shaped terminal connecting portion 20 has an inner conductor 22 extending substantially linearly, and a bushing 24 made of epoxy resin is integrally formed around the inner conductor 22. ing.

The inner conductor 22 has a leading end projecting outward from the upper end of the bushing 24 to form a connection conductor 26. The distal end of the connecting conductor 26 extends to a position adjacent to the distal end of the connecting conductor 6 of the L-shaped terminal connecting portion 1 and is formed on the connecting conductor 40 to which the connecting conductor 6 of the L-shaped terminal connecting portion 1 is connected. By fitting into the formed recess 42, it is electrically connected to the connecting conductor 40. The connection conductor 40 is electrically connected to a connection portion of the sealed device by a connection conductor 43.

Connection holes 28 and 30 are formed below the inner conductor 22 and the bushing 24, and a cable-side connection material (connection tip) 200 is attached.

According to this embodiment, the cable side connection material 2
00 has the same configuration as that of the connection material 1 of the cable connected to the L-shaped terminal connection portion 1.

That is, according to this embodiment, the cable-side connection material 200 has a prefabricated structure, and connection terminals (plugs and multi-lambands) 202 formed at the distal end of the cable 50, the stress cone 203, and the press fitting 20.
4. A connection component such as a compression device 205 and a cable protection fitting 206 is provided, and the connection terminal 202 is electrically connected to the connection hole 28 of the internal conductor by being mounted in the connection holes 28 and 30.
The configuration of the cable-side connection material 200 is not limited to this.

In the terminal connection part having the above-described configuration, the connection materials 100 and 200 for the two cables of each phase are attached to the pair of the L-type terminal connection part 1 and the I-type terminal connection part 20. When a pressure test or the like of each cable is performed, a connection material (connection portion) of the power application cable is attached to a power application port formed by the connection holes 12 and 14 provided in the L-shaped terminal connection portion. Can be done by The connection material can be attached to the power supply port from the side of the device, and workability is extremely good.

[0026]

As described above, the terminating connector of the present invention comprises an inner conductor in which the horizontal conductor and the vertical conductor are integrally formed, and a resin molded around the inner conductor. One end of the horizontal conductor portion protrudes outward from the bushing to form a tip conductor, and the other end of the horizontal conductor portion has a power application port formed therein, the vertical conductor portion and the vertical bushing. Has an L-shaped terminal connection portion to which a cable connection material can be connected from below, a vertically extending inner conductor, and a bushing integrally formed of resin around the inner conductor. At one end of the inner conductor, a tip conductor is formed projecting outward from the bushing, and the inner conductor and the bushing have an I-shaped terminal connection portion to which a cable connection material is connectable from below. The tip conductor of the L-type terminal connection part and the I-type Since the end conductor is connected to the end conductor by a connecting conductor, a one-phase two-row three-phase power transmission cable can be connected to a sealed device with good operability, and the power supply port can be connected. Integrally provided, it is possible to reduce the size of the device and improve workability.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of a termination connection portion of the present invention.

FIG. 2 is a diagram for explaining a connection mode between sealed devices.

FIG. 3 is a sectional view of an L-shaped terminal connection portion.

[Fig. 4] Gas-insulated switchgear (GIS) with L-shaped terminal connection
It is explanatory drawing at the time of arrange | positioning at the side surface.

FIG. 5 shows a gas-insulated switchgear (GI)
FIG. 5 (A) is an explanatory view when the device is arranged on the side step portion of FIG.
Is a side sectional view, and FIG. 5B is a front sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 L-shaped terminal connection part 2, 22 Inner conductor 4, 24 Bushing 6, 26 Tip conductor 20 I-shaped terminal connection part 40 Connecting conductor 100, 200 Cable connection material 300 Power supply port

Claims (3)

[Claims] An internal conductor in which a horizontal conductor portion and a vertical conductor portion are integrally formed, and a bushing integrally formed of resin around the internal conductor, wherein One end protrudes outward from the bushing to form a tip conductor, the other end of the horizontal conductor portion is provided with a power application port, and a cable connection material is connected to the vertical conductor portion and the vertical bushing from below. A possible L-shaped terminal connection portion, a vertically extending inner conductor, and a bushing integrally formed of resin around the inner conductor, one end of the inner conductor having a bushing An I-shaped terminal connecting portion that protrudes outward to form a tip conductor, and the inner conductor and the bushing are connected to a cable connecting material from below. The tip conductor and the I-shaped terminal connection Sealing end which includes said tip conductor parts, characterized in that it is connected by connecting conductors. 2. The method according to claim 1, wherein the L-shaped terminal connection is mounted on a side surface of the sealed device, and the I-shaped terminal connection is mounted on a bottom surface of the sealed device adjacent to a side surface of the sealed device. The termination connection according to claim 1. 3. An L-type terminal connection part and an I-type terminal connection part which constitute the terminal connection box are arranged in three sets,
3. The terminal connection according to claim 1, wherein each connection material of the three-phase cable having a strip configuration can be connected.