JPH0724760Y2 - Fixed disconnection part of draw-out circuit breaker - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention is fixed to a switchboard or the like in a disconnecting section that electrically connects or disconnects a drawer type circuit breaker housed in the switchboard or the like and a main circuit of the switchboard or the like. The structure of the side (hereinafter, referred to as a fixed disconnector).

"Prior Art" Fig. 4 and Fig. 5 show an example of a prior art such as a switchboard in which a drawer type circuit breaker is housed. In the switchboard 1, a three-phase drawer having movable contacts 2a, 2b is provided. The breaker 2 is stored so that it can be inserted and pulled out. The support insulator device 3 is a switchboard 1
It is formed of a support base 3a mounted inside and a support insulator 3b for three phases fixed to the upper and lower surfaces of the support base 3a.

A conductor 6 having a power source side fixed contact 4 at one end to which the movable contactor 2a of the draw-out circuit breaker 2 comes in and out and a power source side connection terminal 5 at the other end is provided on the upper surface of the support insulator device 3, respectively. Three
Phase is installed. Further, the bus bar 7 is connected to the power supply side connection terminal 5 via a branch conductor 8.

The conductor 11 having a load side fixed contactor 9 at one end with which the movable contactor 2b of the draw-out circuit breaker 2 comes in and out and a load side connection terminal 10 to which a load (not shown) is connected is , Is attached to the lower surface of the support insulator device 3.

In such a device, when the draw-out circuit breaker 2 is inserted as shown in FIG. 4, the bus bar 7, the branch conductor 8, the power source side connecting terminal 5, the conductor 6, the power source side fixed contact 4, the movable contact The circuit reaching the load via 2a, the breaker 2, the movable contactor 2b, the load side fixed contactor 9, the conductor 11 and the load side connection terminal 10 is closed. On the other hand, in the case of performing a circuit opening operation, after breaking the circuit by the draw-out circuit breaker 2 and then pulling out the draw-out circuit breaker, the movable contactor 2a and the power source side fixed contactor 4 and the movable contactor The child 2b and the load side fixed contactor 9 are opened.

[Problems to be Solved by the Invention] In the conventional fixed disconnecting section as described above, in order to configure the support insulator device 3, it is only necessary to fix a large number of support insulators 3b to the support base 3a with bolts or the like. Instead, it is necessary to fix the conductors 6 and 11 to the supporting insulator device 3 with bolts or the like, which is a very complicated work.

Further, in order to surely bring the fixed contact 4 on the power source side, the fixed contact 9 on the load side, and the movable contacts 2a, 2b of the drawer type circuit breaker 2 into contact with each other, the conductors 6 and 11 of the fixed disconnector are fixed. It is necessary to secure a certain accuracy in order to improve workability at the time of assembling in a factory, and in the case of not using a jig, in order to ensure this accuracy. It took a lot of time. Furthermore, since the insulation of the electric circuit in the fixed disconnection section mainly depends on air, a large space is required, and not only the depth dimension of the switchboard 1 and the like is restricted but also the fixed disconnection section is formed. Since the bolts for this are located on the back of the draw-out circuit breaker 2, during maintenance and inspection regarding looseness, etc., a person should enter the switchboard 1 or the like, or a door for inspection on the back. Alternatively, it has been troublesome to have a removable back plate structure.

[Means for Solving the Problems] The present invention is intended to solve the above-mentioned drawbacks of the prior art, and a conductor for connecting a three-phase power source side fixed contactor and a power source side connection terminal, and a three-phase The load side fixed contactor and the load side connection terminal are connected to the power source side fixed contactor,
The power supply side connection terminal, the load side fixed contact, and the load side connection terminal are integrally formed of insulating resin so that they are exposed.

The shape of the insulating resin is rectangular when viewed from the side of the draw-out circuit breaker. Three-phase power supply side connection terminals are arranged on this side at equal intervals along the side and three-phase on any other side. It is preferable to arrange the load-side connection terminals of 1 at equal intervals along the side.

[Operation] By configuring as described above, it is possible to make the depth dimension of the switchboard, etc., which has been conventionally restricted by forming the electric path of the fixed disconnection portion, compact by 100 mm or more. Also, not only the assembly work and maintenance and inspection work on the back of the draw-out type circuit breaker, which were required because these electric circuits were connected by bolts, etc., but also the movable contactor and power supply side of the draw-out type circuit breaker become unnecessary. The positional accuracy adjustment work between the fixed contactor and the load side fixed contactor is not necessary, and the assembly jig for this is also unnecessary.

"Embodiment" Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. It should be noted that the same parts as those in the above-mentioned conventional technique are denoted by the same reference numerals, and duplicate description will be omitted.

1 and 2 show an embodiment of the present invention.
A power supply side connection terminal 15 is formed at one end of a conductor 16 made of a copper band, and a power supply side fixed contact 14 is joined to the other end by welding or the like at substantially right angles. A load-side connection terminal 20 is formed at one end of a conductor 21 made of a conductor, and a load-side fixed contact 19 is joined to the other end by welding or the like at a substantially right angle.

The three-phase conductors 16 and 21 are made of insulating resin 13 such as epoxy resin.
Thus, the power supply side fixed contact 14, the power supply side connection terminal 15, the load side fixed contact 19, and the load side connection terminal 20 are molded so as to be exposed. That is, the insulating resin 13 is formed into a substantially rectangular shape as viewed from the draw-out circuit breaker 2 side, and three pieces are parallel to the upper and lower plate portions of the insulating resin 13 at equal intervals and project toward the draw-out circuit breaker 2 side. A cylindrical bell-shaped portion 13a is formed. The three-phase power source side fixed contactor 14 is a bell-shaped portion of the insulating resin 13 formed on the upper portion.
Each of them is exposed from the insulating resin 13 in 13a, and the three-phase power supply side connecting terminals 15 are respectively arranged at equal intervals along the upper side of the insulating resin 13 and exposed upward. further,
The three-phase load-side fixed contacts 19 are exposed from the insulating resin 13 inside the bell-shaped portion 13a formed under the insulating resin 13, and the three-phase load-side connecting terminals 20 are respectively formed of the insulating resin 13. It is arranged at equal intervals along the lower side and is exposed downward.

In the device of the present invention, the busbar 7, the branch conductor 8, and the branch conductor 8 are inserted in the state in which the draw-out circuit breaker 2 is inserted as shown in FIG.
Power supply side connection terminal 15, conductor 16, power supply side fixed contactor 14, movable contactor 2a, drawer breaker 2, movable contactor 2b, load side fixed contactor 1
The circuit reaching the load via 9, the conductor 21, and the load-side connection terminal 20 is closed. On the other hand, when the circuit breaker is operated, the movable contactor can be operated by breaking the circuit by the draw-out breaker 2 and then pulling out the draw-out breaker 2, just as in the prior art.
Circuits are opened between 2a and the fixed contact 14 on the power source side, and between the movable contact 2b and the fixed contact 19 on the load side.

FIG. 3 shows another embodiment of the present invention in which the three-phase load side connection terminals 20a formed on the conductor 21a are arranged at equal intervals on the right side of the insulating resin 13 and are exposed to the right. There is. In this case, it goes without saying that the insulating resin 13 may be formed at equal intervals along the left side of the insulating resin 13 and exposed to the left.

[Advantage of Invention] According to the present invention, since the three-phase fixed disconnection part is integrally formed by the insulating resin, not only the connecting work by the bolts can be greatly reduced, but also the depth of the switchboard is particularly large. The size can be made compact.

In addition, since the power source side fixed contact and the load side fixed contact which the movable contact of the drawer type circuit breaker contacts and separates are integrally formed by the insulating resin, the accuracy for surely moving and contacting the movable contact can be improved. It can be secured easily.

[Brief description of drawings]

1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is a view taken along line AA of FIG. 1, and FIG. 3 is another embodiment of the present invention taken along line AA of FIG. FIG. 4 is a side sectional view showing an example of the prior art, and FIG. 5 is a BB view of FIG. In the figure, 1 is a switchboard 2 is a draw-out type circuit breaker 2a, 2b is a movable contactor 7 is a busbar 13 is an insulating resin 14 is a fixed contact on the power supply side 15 is a connection terminal on the power supply side 16,21 and 21a is a conductor 19 is a load side The fixed contacts 20 and 20a are load side connection terminals.

Claims (2)

[Scope of utility model registration request] 1. A three-phase load in which a three-phase power source side fixed contactor connected to a bus bar through a power source side connection terminal is arranged in a switchboard or the like and connected to a load through a load side connection terminal. The fixed contact on the side is arranged in a switchboard, etc., and the movable contact of the draw-out type circuit breaker housed in the switchboard, etc. is inserted into the draw-out type breaker,
In a case where the power supply side fixed contactor and the load side fixed contactor are brought into contact with and separated from each other by drawing out, a conductor connecting the three-phase power supply side fixed contactor and a power supply side connection terminal, and the three-phase load side fixed contact A conductor for connecting the child and the load-side connection terminal is integrally formed of an insulating resin so that the power-source-side fixed contactor, the power-source-side connection terminal, the load-side fixed contactor, and the load-side connection terminal are exposed. The fixed disconnection part of the characteristic draw-out circuit breaker. 2. The insulating resin is formed in a rectangular shape when viewed from the side of the draw-out circuit breaker, and the three-phase power supply side connection terminals are arranged on one side thereof at equal intervals along the side, and any other shape. The fixed disconnection part of the draw-out circuit breaker according to claim 1, wherein the three-phase load-side connection terminals are arranged at equal intervals along the side.