JPS6019464Y2 - Drawer shape and cutter - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a drawer-type breaker, and particularly to a drawer-type breaker equipped with a protection device on the tip end side of the power supply side terminal of the drawer frame (inner part of the drawer frame).

A draw-out type circuit breaker is often used in switchboards and has a structure as shown in FIG.

In Fig. 1, 1 is the breaker main body, 2 is its drawer frame,
3 is a power supply side terminal that is electrically connected to the power supply 10 and projects inside the drawer frame 2; 4 is a terminal fixing insulator that fixes the power supply side terminal 3 to the drawer frame 2; 5 is the power supply 10 and the power supply side terminal 3; A connecting conductor 6 is a terminal fixed to the breaker main body 1 and electrically engaged with the power supply side terminal 3.

FIG. 2 shows a state in which the breaker body 1 has been pulled out and removed from FIG. 1.

In this state, it may be necessary to perform maintenance and inspection of the drawer frame 2 and the electric appliances on the switchboard from the front.

However, after pulling out the breaker body 1 from the drawer frame 2, there was nothing to electrically cover the power supply side terminals 3, so the power supply 1
If the circuit breaker was not turned off to zero, it would always remain charged, causing an electrical accident when the circuit breaker was pulled out for maintenance and inspection.

Therefore, conventional devices have the disadvantage that it is necessary to turn off the power after pulling out the breaker or to cover the terminal portion with an insulating material each time.

This invention was made with the aim of eliminating the above-mentioned drawbacks, and aims to provide a pull-out type breaker in which the power supply side terminal is covered with a flexible insulating member when the breaker body is pulled out. .

An embodiment of this invention will be described below based on the drawings.

FIG. 3 is a partially sectional side view of the electrical connection part where the breaker body and the drawer frame are in a connected state. In the figure, 6 is a terminal of the breaker body 1, and the conductor 7 is fixed to the breaker body.
installed on.

The terminal 6 includes at least two pairs of upper and lower contacts 6a and a compression spring 6b.
A spacer 6c for maintaining a certain distance between the 12 pairs of contacts 6a, a pin 6d for hanging the compression spring 6b, and 1
Consisting of a pair of side plates 6e, as shown in the plan view of FIG.
It is attached to the conductor 7 on the breaker main body side with screws 11.

On the other hand, the power supply side terminal 3 fixedly supported by the insulator 4 of the drawer frame 2
A pair of flexible insulating protection members 8 are fixedly attached to the insulator 4 with screws 9 to cover the tip of the insulator 4 .

FIG. 5 is a partially sectional side view showing a state in which the breaker main body 1 is separated from the drawer frame 2. In this separated state, each of the flexible insulating protection members 8 is attached to the tip of the power supply side terminal 3. A part 8a that covers the part 8a and a part 8b that curves inwardly.
and a subsequent outwardly directed portion 8c, preferably the pair of inwardly curved portions are substantially in contact with each other.

As shown in FIG. 3, this pair of flexible insulating protection members 8, in the state of electrical connection between the breaker main body 1 and the drawer frame 2, due to their flexibility, When its outward tip is fully opened and the breaker main body 1 and the drawer frame 2 are separated, it returns to the shape shown in FIG. 5.

Although the operation of only one terminal is explained in FIG. 3 and FIG. 5, for example, in the case of a three-pole breaker, three terminals on the power supply side
It is sufficient to equip each terminal with this flexible insulating protection member 8.

The drawer type breaker of this invention has the structure and function as described above, so when the breaker body is pulled out from the drawer frame,
All power supply side terminals 3 are electrically insulated and isolated, so there is no possibility of electrical accidents caused by metal objects, etc., and it is possible to maintain the pull-out frame of a breaker from the front of the switchboard without turning off the power, or access the electricity of the switchboard. Inspection of instrument parts can be made safe and easy.

Particularly in recent years, where wiring has many branches and it is necessary to maintain and inspect a panel with a single draw-out breaker while maintaining the branches of different systems, being able to work without turning off the power is even more effective. big.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view showing an outline of the structure of a conventional drawer-type breaker, and Fig. 2 is a partially sectional side view showing an outline of the structure of a drawer frame with the breaker main body removed from Fig. 1. , 3 and 5 are partial cross-sectional side views of the connection part showing the electrical connection and disconnection states between the breaker main body and the drawer frame in one embodiment of this invention, and FIG. 4 is the breaker main body side. FIG. 3 is a plan view of the terminal. In the figure, 1 is the breaker body, 2 is the drawer frame, 3 is the power supply side terminal of the drawer frame, 4 is the insulator, 6 is the breaker body side terminal, 6a
is its contact, 6b is a compression spring, 6c is a spacer, 6d
6e is a pin, 6e is a side plate, 7 is a breaker main body side conductor, 8 is a flexible insulating protection member, 9 is a screw, and 10 is a power source.

Claims (2)

[Scope of utility model registration request] (1) A drawer frame equipped with a power supply side terminal, a breaker body equipped with a terminal that slides with respect to the drawer frame and can freely communicate with the power supply side terminal, and when both terminals are opened, a flexible insulating protection member that covers the tip of the power supply side terminal of the drawer frame and is opened by the terminal of the breaker main body when both terminals are closed to enable closing of both terminals; The flexible protection member is composed of two plate-shaped insulators fixed to an insulator that fixedly supports the power supply side terminal of the drawer frame,
Each of the drawer-type circuit breakers has a portion that covers the tip of the power supply side terminal, a portion that curves inwardly and comes into contact with each other, and a portion that extends outwards. (2) The terminal of the breaker body includes at least one pair of contacts, a spacer provided between the two liquid contactors, and a spring that biases both ends of the contactors in the closing direction. Claim 1 of the first registered utility model, wherein both ends of the contacts are attached to the conductor on the main body side of the breaker via a pair of side plates.
Draw-out type breaker as described in section.