JPS60121638A - Fixing mechanism of vacuum breaker terminal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an IS[l-] for a fixing mechanism of a terminal connected to a movable contact for vacuum pulp in a vacuum pulp chamber.

Generally, the IkIf section of a vacuum breaker has two external conductors placed in the circuit breaker frame for each phase. For example, the upper conductor is directly connected to the fixed electrode of the vacuum valve. -h The conductor located at the lower part is connected to the movable electrode portion of the vacuum valve via the connecting terminal and the flexible conductor in sequence.

By the way, a conventional fixing mechanism between a conductor and a connecting terminal connected to a movable electrode portion of the vacuum valve is as shown in FIG. 4. In FIG. 1, reference numeral 1 denotes an insulating member for supporting a conductor, which corresponds to, for example, a part of the frame of a pure air breaker. A conductor 2 is fixed to the insulating member 1 by means of bolts and nuts, which will be described later, and has a main conductor at its outer end.
A disconnecting finger 3 is installed. A connecting terminal C1 4 is connected to a movable electrode of a vacuum valve (not shown) via a flexible conductor 5. 6 is a bolt, and the above-mentioned insulating member 1. Conductor 2. A series of through holes 1a and 2 formed in the terminal 4
a, 4a, and the spring washer 7 and nut 8 are sequentially fitted into the protrusion on the side of the head of the sentence. In this way, insulating member 1. Conductor 2. and the terminal 4 is connected to the head of the bolt 6 and the neck 1-
8 and fixed in the - body direction.

However, the conventional configuration shown in Fig. 1 is different from the conventional configuration shown in Figure 1. Thermal expansion occurs and the insulating member 1 is strongly compressed.In the process of repeating this process, the insulating member 1 for supporting the conductor contracts by a large amount, and this contracted state is 41 changes continue. Therefore, the tsumugi r of pol 1-(5 and J-tuto ε3)
If the J state is insufficient, then C is the body 2Gii i
'4 Which j-1 contact is weakened. This naturally means that the resistance value between the conductor 2 and the end 1'''□4 becomes large and ψ (Lh contact J of the empty barno, the current flow of the "1 empty" twin car 31\ is obstructed). There was a shortcoming in life.

For this reason, for example, there is a method of embedding a metallic insulating layer (No. It is conceivable, but the complexity of including 4M may make it difficult to put it into practical use.

Kimitsuaki's 1゛1 target is ippu empty pal f O) iiJ moving tangent I
In a configuration in which the connected end r and the conductor are connected to the pole 1 and the conductor is tightened and fixed to the insulation part of the 7th layer at the pole 1-, a female thread for fitting the pole 1 is formed on the conductor. The purpose is to continuously maintain the press-contact state between the end r and the conductor by fitting the pole l- into the conductor.

Above, the illustrated embodiment will be specifically explained. Second
The figure is a sectional view of a main part showing an embodiment of the present invention. In FIG. 2, C111 is a vacuum valve. Reference numeral 12 is connected to the O1 working contact of the vacuum valve 110). Reference numeral 13 denotes a frame that surrounds the entire vacuum (no disconnection) including the vacuum valve 11.

1/I is an insulating member for supporting a conductor, which is integrally formed with the above frame. The main circuit finger 16 is attached.

The leg part 17a of the 17 is fitted into the ( )-shaped opening 141 formed in the insulating member 14, and the head part 1
711 Cal1tl 1.114 b, (1) -1
On the other hand, the thread 17c formed on the bolt leg 17a is fitted into the female thread i5a formed on the conductor 15.

Reference numeral 18 denotes a connection terminal, which is connected to the movable electrode part 12 of the vacuum valve ``'' 1 through a luxiple conductor 19, and a port 18a formed in this connection terminal +8 is connected to the port 1-leg part 17a of F. Or play m+. 20 is a spring washer, 2'1 is a spring washer, and 2'1 is a spring washer.
B (Q 1.i Through hole 1ε3aJ: Fitted into the part that extends out. 22 is a bolt that connects the conductor 15 and the connecting end r 18
Prevents changes in IN relative position with 11-Rir0-(・There is.

With the configuration described in 1 above, the vacuum valve 11 is in the closed state.
5C, the fixed electrode part of the vacuum valve 11 is electrodynamic (
Electric current flows through the terminal 18 and the conductor 15, which is electrically connected to a part of the terminal 19.

A3, this conductor 15 is connected to the insulating member '14 using the female thread 15 formed on the head 171 of the pole 1 to the leg 178) and the screw 17 (z and the conductor 15) formed on the pole 1 to the leg 178.
] J is achieved by fitting with a. On the other hand, the connection between the terminal 1B and the conductor 1 is achieved by the nut 21 and the fitting between the screw 17G and the single screw 15a.

In addition, head 17I of pols 1 to 17] and knot 2
1 and spring washer 20, the same effect can be obtained even if the positions are reversed. Also, the portions of the conductor 15 and the terminals 1B that loosely fit into the leg portions 17a of the poles 1 to 1 may be either through holes or openings (not limited to the embodiments).

As described above, the terminal fixing mechanism of the vacuum breaker according to the present invention connects the terminal that is connected to the movable electrode part of the vacuum valve by a luxiple conductor, and the conductor that fixes the Neuger, which is responsible for disconnecting the main circuit, to the external force end. In addition, as a means of fixing it to the insulating member, it is fitted into the head of the bolt and the leg of the pole h, centering on the fitting part between the screw formed on the leg of one pole 1 and the female thread formed on the conductor. The supporting insulating member and the terminal are disposed between the nut and the bolt leg portion in a loosely fitted manner. Based on this configuration, without complicating the structure 1, there is no room for the terminal and the conductor to be connected via an insulating member that undergoes some permanent shrinkage due to stress, so the vacuum pulp movable electrode section is always connected. The pressure contact force between the connected terminals and the conductor that fixes and covers the fingers is always maintained firmly using Bi.

[Brief explanation of drawings]

Figure 1 shows the conventional configuration, and Figure 2 shows this R.
FIG. 1 is a cross-sectional view showing a configuration according to the invention. 12...Vacuum balloon TiJ! FJI Den 4~ Division,
14...Supporting insulation part shrine, -1/Ib...Round 1. J
, i F)...Conductor. 15a...Female thread formed on the conductor, 16...Twin car, 17...Pol 1., '17c...Male thread. 18... end i', 18 a... through hole, 19...
・Flexi 1) #Body, 21... Thick 1 ~ Departing person Shinko Denki Co., Ltd. Agent Patent Attorney 1 Haruya Karasufuji

Claims (1)

[Claims] 1. In a configuration in which a terminal connected to the movable electrode part of the vacuum pulse 1 via a flexible conductor and a conductor provided with a main circuit disconnection noinger at the outer end are bonded and fixed to a supporting insulating member, A female thread is formed on the conductor to fit into the screw formed on the leg to the fixing pole 1, and a frontage is formed in the insulating member and the terminal into which the leg of the pole is loosely fitted, An opening of the terminal and an insulating member are provided between the fitting point of the terminal (-) and the -1 screw formed on the conductor and the bolt head, and between the fitting point and the nut fitted into the bolt, respectively. Fixing the terminal for a vacuum breaker with one side of the terminal placed between the two.