JPH07249362A - Terminal adapter of circuit breaker - Google Patents

Abstract

PURPOSE:To enable crimped terminals of external wirings to be easily connected to the terminal bolts of a circuit breaker without occupying extra space inside a distribution panel. CONSTITUTION:A terminal adapter 9 comprises an insulating base 10 and a terminal bar 11 assembled on the insulating base with a crimped terminal tightening screw 12 attached to one end of the bar 11. To connect the crimped terminal 6 of the external wiring 7 to each terminal bolt 2 drawn out onto the back of a circuit breaker 1, the terminal bar of the terminal adapter is fitted into each terminal bolt of the circuit breaker and tightened, and under these conditions the crimped terminal of the external wiring is screwed and connected to the terminal bar. Also, terminals for a single or three phases (U, V, W) arranged to match the interval at which the terminal bolts of the circuit breaker are arranged, are assembled on the insulating base and an interphase partition 10a is provided to electrically insulate and isolate the terminal bars of each phase from one another.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal adapter for a circuit breaker for wiring, which is mainly used in a switchboard.

[0002]

2. Description of the Related Art Generally, a circuit breaker to be used by incorporating it into a switchboard as shown in the above, has terminal bolts (stud bolts) barely drawn out from the back side of the breaker body and wired to the terminal bolts in the panel. The structure is such that the copper strip bars on the power supply side and the load side are fastened and connected. FIG. 3 shows a circuit breaker having such a structure. In the figure, 1 is a circuit breaker, 2 is a terminal bolt on the power supply side and a load side, which is pulled out from the mounting seat portion 1a of the circuit breaker 1 to the back side. Yes, the copper strip bar 4 wired inside the switchboard 3 is the terminal bolt 2
The nut 5 is directly fastened to the connection.

On the other hand, when the external wiring (covered wire etc.) 7 is connected to the circuit breaker 1 with the terminal bolt by using the crimp terminal 6, conventionally, the size matching between the terminal bolt 2 and the crimp terminal 7 is performed. There are also problems of reliability, connection reliability, and workability. Generally, it is prepared as an optional item between the copper strip bar 4 connected to the terminal bolt 2 of the circuit breaker 1 and the crimp terminal 6 of the external wiring 7. With the relay terminal block 8
The copper strip bar 4 and the crimp terminal 6 are screwed to the terminal block 9 for connection.

[0004]

However, in order to adopt the above-mentioned relay terminal block, the terminal block 8 is installed in the switchboard separately from the circuit breaker 1, and the terminal bolt 2 and the terminal of the circuit breaker are installed. Since it is necessary to wire the copper strip bar 4 to and from the table 8, there are problems such as expansion of the wiring space in the switchboard and an increase in the number of wiring construction steps.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to solve the above-mentioned problems and to provide a crimp terminal for external wiring to a terminal bolt of a circuit breaker without occupying an extra space in a switchboard. It is to provide a terminal adapter for a circuit breaker that can be easily connected.

[0006]

In order to achieve the above object, the terminal adapter of the present invention comprises an insulating base and a terminal bar having a crimp terminal tightening screw attached to one end thereof and incorporated into the insulating base. The terminal bar is directly fastened to the terminal bolt of the circuit breaker for use. In addition, in the above terminal adapter, single-phase to three-phase terminal bars arranged in line with the arrangement pitch of the terminal bolts of the circuit breaker are incorporated in the insulation base, and the insulation base is further equipped with terminal bars for each phase. It is possible to integrally form the phase interval wall that separates the spaces.

[0007]

[Operation] When connecting the crimp terminal for external wiring to the circuit breaker, attach the terminal adapter with the above configuration to the terminal bolt of the circuit breaker, and then crimp the external wiring to the terminal bar incorporated in the insulation base. Screw the terminal. As a result, the terminal bolt of the circuit breaker and the crimp terminal of the external wiring are electrically connected to each other via the terminal adapter. Here, by incorporating a single-phase or three-phase terminal bar in the insulating base of the terminal adapter, external wiring can be connected on the same terminal adapter. Further, the phase interval wall provided on the insulating base functions as an insulating barrier between the terminal bars and between the terminal bolts of the circuit breaker.

When the crimp terminal is not used for the external wiring, the terminal adapter is removed from the terminal bolt of the circuit breaker, and the copper strip bar for wiring is directly fastened and connected to the terminal bolt.

[0009]

Embodiments of the present invention will be described below with reference to FIGS. In the drawings of the embodiments, the same members corresponding to those in FIG. 3 are designated by the same reference numerals. In the figure, a terminal adapter 9 according to the present invention is an insulating base 1 made of a resin molded product.
0 and three phases (U, V, W) built into the insulating base 10.
Phase) terminal bar 11 made of copper strip, and terminal bar 11
It is composed of an assembly with a crimping terminal tightening screw 12 attached to one end of the terminal, and a bolt hole to be fitted into the terminal bolt 2 of the circuit breaker 1 is opened at the other end of the terminal bar 11. Further, the insulating base 10 is integrally formed with a partition-shaped phase interval wall 10a so as to isolate the terminal bars 11 of each phase from each other. In addition, 13 is a fastening screw for fixing the terminal bar 11 to the insulating base 10.

The terminal adapter 9 having such a structure is prepared as an optional product of the circuit breaker. When the external wiring 7 is connected to the circuit breaker 1 by using the crimp terminal 6, the terminal bar 11 of the terminal adapter 9 is used. Is inserted into the terminal bolt 2 of the circuit breaker, and the nut 5 is tightened to mount it. Then, in this attached state, the external wiring 7
Put the crimp terminal 6 on the terminal bar 11 and tighten the tightening screw 12.
And the connection work is completed.

As a result, a current flows from the terminal bolt 2 of the circuit breaker 1 to the external wiring 7 through the terminal bar 11 and the crimping terminal 6 when energized. Further, the interphase insulation of the terminal bar 11 of each phase of U, V and W and the terminal bolt 2 is performed by the insulating base 1.
It is secured by the partition wall 10a of 0.

[0012]

As described above, when the external wiring is connected to the terminal bolt protruding on the back side of the circuit breaker by using the crimp terminal, the terminal adapter of the present invention is attached to the terminal bolt of the breaker. Thus, the external wiring can be easily connected. Moreover, since the terminal adapter is directly attached to the terminal bolt of the circuit breaker, compared to the conventional method of installing the relay terminal block at a position different from the circuit breaker and connecting the crimp terminal of the external wiring, The advantages are that it is not necessary to secure an extra space for installing the relay terminal block in the switchboard, and the number of wiring steps can be reduced.

[Brief description of drawings]

1A and 1B are configuration diagrams of an embodiment of the present invention, in which FIG. 1A is a sectional view of a configuration of a terminal adapter in a use state represented together with a circuit breaker, and FIG. 1B is an end view of the terminal adapter.

FIG. 2 is an enlarged cross-sectional view showing the detailed structure of the terminal adapter in FIG.

3A and 3B are diagrams showing a conventional connection method in which a circuit breaker and a crimp terminal for external wiring are connected using a relay terminal block, FIG. 3A is a plan view, and FIG. 3B is a side view.

[Explanation of symbols]

 1 Circuit Breaker 2 Terminal Bolt 6 Crimp Terminal 7 External Wiring 9 Terminal Adapter 10 Insulation Base 10a Phase Separation Wall 11 Terminal Bar 12 Crimp Terminal Tightening Screw

Claims (3)

[Claims] 1. A terminal adapter for connecting a crimp terminal of external wiring to a circuit breaker having terminal bolts drawn out on the back side of a breaker body, which comprises an insulating base and a crimp terminal tightening screw at one end. A terminal adapter for a circuit breaker, comprising: a terminal bar attached to the insulation base and fastened to a terminal bolt of the circuit breaker. 2. The terminal adapter according to claim 1, wherein single-phase or three-phase terminal bars arranged in line with the arrangement pitch of the terminal bolts of the circuit breaker are incorporated in an insulating base. Terminal adapter. 3. A terminal adapter for a circuit breaker according to claim 2, wherein a phase spacing wall for isolating the terminal bars of each phase from each other is integrally formed on the insulating base.