JPH02239534A - Breaker for wiring with earth leakage alarming function - Google Patents

Abstract

PURPOSE:To enhance maneuverability and also easiness in panel cut operation by installing an earth leak display member, a reset button, and a test button side by side in the front window frame of a breaker case. CONSTITUTION:If an earth leak display member 11A, a reset button 12A, and a test button 13A are installed side by side in a window frame 3, they protrude from an opening for the window frame 3 when a panel of a board is shut. This omits the panel from necessity to be provided with any special opening for these components. Also this is easy to use, because the member 11A and the buttons 12A, 13A are located close to a manual operation handle 4 in such an arrangement as side by side.

Description

[Detailed Description of the Invention] [Industrial Field of Application J This invention is a molded circuit breaker with an earth leakage alarm function, which has an earth leakage alarm function in addition to the overload/short circuit protection function, which is the basic function of a molded circuit breaker. It is related to. [Prior Art] As a conventional molded case circuit breaker with an earth leakage alarm function of this type, those shown in Figs. 3 to 5 have been proposed. Figure 3 is a perspective view of the exterior, Figure 4 is a schematic front view with the cover removed, and Figure 5 is its circuit diagram. In the figure, (1) is a molded circuit breaker, which is not shown but has an overload/short circuit protection function. (2) is the circuit breaker case of the molded circuit breaker (1), which consists of a pace (2a) and a cover (2b).

(3) is the window frame formed on the front of the cover (2b), (4)
(5) and (6) are the manual operation handle protruding from the opening (3a) of the window frame (3), and (5) and (6) are the circuit breaker case (2).
Load side/power source terminals located on both ends of the
(7) is a zero-phase current transformer, (8) is an earth leakage relay, (9) is an amplifier installed between the zero-phase current transformer (7) and the earth leakage relay (8), and (10) is the earth leakage relay ( 8) control power line, (1l
) is an earth leakage indicator installed at the zero-phase current transformer (7),
When the earth leakage relay (8) operates, for example, an electric display member (lamp) lights up, and a mechanical display member (button) projects from the surface of the cover (2b). (1
．． 2) is a reset button, which is provided for resetting the earth leakage display member (l1). (13) is the earth leakage relay (8
) This is the test button located at the position , and is used to check the current leakage operation in a simulated manner. (14) is the circuit breaker case (
When a current leak occurs in the power distribution line, which is the earth leakage alarm lead wire led out from 2), the zero-phase current transformer (7) detects the leakage current, and this detection signal is amplified by the amplifier (9) and Drive the relay (8) to issue an alarm. At the same time, the earth leakage display member (1l) operates. Since the alarm is electrically latched inside the circuit, it will be held until the reset button (12) is pressed or the main circuit power is removed. [Problems to be Solved by the Invention] In the conventional molded circuit breaker with an earth leakage alarm function as described above, the earth leakage display member (l1), the reset button (12), and the test button (l3) are connected to the circuit breaker case (2). ) are arranged randomly in front of the window frame (3), making them difficult to operate and difficult to use.
) For the earth leakage display member (11) and the reset button (12) placed on the front, openings for these must be provided in the panel of the board separately from the opening for the window frame (3), and it is necessary to cut the panel. The problem was that it was time consuming. This invention was made to solve this problem, and by arranging an earth leakage display member, a reset button, a test button, etc. in parallel on the front window frame of the circuit breaker case, ease of use is improved. The purpose of this invention is to obtain a molded circuit breaker with an earth leakage alarm function that can improve the workability of panel cutting. [Means for Solving the Problems] In order to achieve the above object, a molded circuit breaker with an earth leakage alarm function according to the present invention has an earth leakage display member, a reset button, a test button, etc. attached to the front window frame of the circuit breaker case. These are installed in parallel. [Function 1] In this invention, the earth leakage display member, reset button, test button, etc. are arranged side by side on the front window frame of the circuit breaker case, so the earth leakage display member is placed on the panel near the manual operation handle. The reset button, test button, etc. are arranged side by side, making it easier to use, and there is no need to provide a special opening for these on the panel.

〔Example〕

An embodiment of this invention will be explained with reference to FIGS. 1 and 2. FIG. 1 is an external perspective view, and FIG. 2 is a schematic front view with the cover removed. Parts that are the same as or equivalent to those of the prior art are designated by the same reference numerals and their explanations will be omitted. In the figure, (II
A) is the earth leakage display member (12A) is the reset button, (1
3A) are test buttons, both of which are placed side by side on the window frame (3). In this way, the earth leakage indicator member (IIA) and the reset button (
12A) and the test button (1 3A) on the window frame (3), when the board panel is closed, the window frame (
3) from the openings for these (lIA), (12A). (1
3A) protrudes outside, so these (1 1
There is no need to provide special openings for A), (12A) and (13A), and there is also an earth leakage indicator (IIA), reset button (12A), and test button (13A) near the manual operation handle (4). It is easier to use because it is lined up with . [Effect of the invention J As described above, according to the present invention, the earth leakage display member, reset button, test button, etc. are arranged side by side on the front window frame of the circuit breaker case, making it easier to use and reducing the panel cutting work. This has the effect of improving sexual performance.

[Brief explanation of drawings]

Fig. 1 is an external perspective view showing an embodiment of the present invention, Fig. 2 is a schematic front view with the cover removed, Fig. 3 is an external perspective view showing the conventional one, and Fig. 4 is a schematic external view with the cover removed. The front view and Figure 5 are its circuit diagrams. In the figure, (1) is a molded circuit breaker, (2) is a circuit breaker case, (3) is a window frame, and (4)
(7) is the zero-phase current transformer, (8) is the earth leakage relay, (ImA) is the earth leakage indicator, (12A) is the reset button, and (13A) is the test button. In addition, the same symbols in the figures indicate the same or equivalent parts. Agent: Patent Attorney Masuo Oiwa

Claims (1)

[Claims] (1) A zero-phase current transformer and an earth leakage relay are built into the circuit breaker case of the molded circuit breaker, and in addition to the overload and short circuit protection function, which is the basic function of the molded circuit breaker, it also has an earth leakage alarm function.
and a molded circuit breaker with an earth leakage alarm function in which an earth leakage display member, a reset button, a test button, etc. are provided on the surface of the circuit breaker case, wherein the earth leakage display member, the reset button, the test button, etc. A molded circuit breaker with an earth leakage alarm function, which is characterized by being installed side by side on the front window frame of the case.