JPS5925144A - Leakage breaker - 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 earth leakage breaker, in which a handle and a contact are releasably connected by a tripping means, and the disconnecting means is activated when an overcurrent flows through an electric circuit including the contact. It is a force that releases the interlock between the hashidle and the contact via the tripping means and releases the contact, and is used to create a condition in which an overcurrent is passed through the electric circuit and to confirm the normal operation of the tripping means. This invention relates to an earth leakage breaker in which a test button for operating an operation confirmation means is exposed on the outer peripheral surface of the container.

Generally, in this type of earth leakage breaker, as shown in Fig. 1, there are contacts (4 ) is provided,
This contact (4) is connected to the hashidle (5) via a tripping means (6). The tripping means (6) is a contact (4)
The connecting position where the and Hasidor (5) are connected, and the contact point (4)
) and a dissociation position where the interlock with the handle (5) is released and the contact (4) is opened, and when an overcurrent flows in the electric circuit, the dissociation means (7) is activated. The tripping means (6) is adapted to be moved to the disengagement position. Although the overcurrent flows and the contact is opened in this way, the tripping means (6) returns to the connected position and the hashidle (5)
), the contact (4) can be opened and closed again. By the way, when inspecting the distribution line connected to the output terminal (3) side of the leakage force, it goes without saying that the contact (4) should be left open. In order to prevent the risk of someone inserting the handle (5) and closing the contact (4) without knowing that another person is inspecting the inside, the handle (5) has conventionally been provided with a locking mechanism. However, installing a one-cock mechanism on the hashidor (5) requires many other parts, and it is difficult to force the handle (5) without knowing that the locking mechanism is activated.
) could damage the S handle (5).

The present invention has been made in view of the above-mentioned points, and its main purpose is to hold the tripping means directly at the corner point IL for releasing the interlock between the hash doll and the contact point. By providing an opening prohibition means, it is possible to set a state in which the contact does not close even if the wire is turned on.The other purpose is to create a state in which an overcurrent flows through the electrical circuit. Activate the glue confirmation means to confirm that the tripping means is working properly.
In addition, by providing an operating part for activating the closure inhibiting means on the test button exposed on the outer surface of the container body, it is possible to prevent other devices from closing (with fewer parts and a simpler structure than providing a shallow groove). The goal is to make it possible to do so.

Hereinafter, an embodiment of the Kinei 1 will be described based on the drawings. The earth leakage breaker according to the ``Kienori'' has a contact (4) that opens and closes the electric path formed between the input terminal (2) and the output ☆ (M element (3) provided on the vessel full, and A hashidor (5) that protrudes from the outer peripheral surface of (1) and is held in two positions: a first holding position in which the contact (4) is opened and a second holding position in which the contact (4) is closed; Connect the contact (4) and handle (5) 1υ
The connection position and contact point (4) and the hashidor (5) that can be connected
), and a tripping means (6) that is movable between a disengagement position that releases the interlock with the contact point (4) and opens the contact (4), and a tripping means (6) that detects that an overcurrent has flowed in the electric circuit and releases the contact (4). Means (6
) to the dissociation position; and operation confirmation means (8) for confirming that the tripping means (6) operates normally by creating a state in which an overcurrent flows through the electric circuit.
It has a first operation part (9) for making the operation confirmation means (8) of 1, and has a first operation part (9) that allows a part to be exposed on the outer circumferential surface of the container body +1+. ) in the dissociation position independently of the dissociation means (7), and the handle (5
), and the test button (lO) is equipped with an opening inhibiting means (11) independent of the first operation part (9). A second operating section (12) is provided for operating the second operating section (12).
) is activated by operating the test button (lO), the closing inhibiting means (I
I) holding the tripping means (6) in the disengaged position via k, and holding the tripping means (6) in two positions, one in which the closing inhibiting means (11) is released and the tripping means (6) is returned to the connected position. It is characterized by being As shown in Figures 2 to 9, this earth leakage breaker is constructed by assembling a number of parts into a container body (1) consisting of a container base (15) and a lid (I6) both molded from synthetic resin. An input terminal (2) and an output terminal (3) can be arranged at the upper and lower throats of the table 5), respectively. An electric path that is opened and closed by the first contact (4) is formed between the input terminal (2) and the output terminal (3).

The first contact (4) is composed of a first fixed contact υ and a first i'iJ moving contact (22). The first fixed contact (21) is formed at one end of the terminal plate (four) constituting the input terminal (2),
This terminal plate is fixed to the device base U51 by studs (24).The first aJ movable contact plate 25 has at one end all the 10J movable contacts (7!2) corresponding to this first fixed contact.
) is formed into a long and narrow shape, and the other end is fixed to the holder (15) together with the bimetal (27) with a screw 6). The bimetal (27) is connected to the output terminal (to) via the braided wire 12 (to).
3), and an electric path from the input terminal (2) to the output terminal (3) can be constituted by these members. Utensil stand (1
5) A pair of these electric circuits are formed on the top. A second movable contact plate (9) is coupled to the first movable contact plate (25) on one of the electrical circuits. The second movable contact plate 9) has an elongated shape that is approximately the same as the first movable contact plate, and one end is connected to the first movable contact plate 9) with the first movable contact plate (22). Fix it to the free end of the 111 contact plate (25), and
A second movable contact (:30) is formed by bending the free end protruding in the 1J direction into a 1-curve shape. This second town!
The second fixed contact (31) is connected to the second fixed contact (30) and the second fixed contact (30).
formed in a part of the terminal block (33),
Ru. This terminal block (33) has a 7'L horizontal piece attached to the device base (15) with rivets, the tip of the vertical piece is a second hard contact (31), and the horizontal piece is attached to the lead wire (34). ) is the terminal section to which it is connected. This lead wire (34) connects the 21st town leg contact (31) and one end of the coil in the electromagnetic device (40), which will be described later, and is fixed to the terminal part by spot welding.The input terminal ( 2) and the output terminal (
3), there is a tripping means (6) that drives each of the first movable contact plate arcs to open and close the first contact (4) and the second contact Gz, and an overcurrent flows in the electric circuit. 'M, 1iI which detects it and drives the tripping means (6) when
lt means (7) are provided. The tripping means (6) is
As shown in FIGS. 10 and 11, it is connected via a ]-shaped link (51) to a tiltable handle (5) protruding from the upper surface of the vessel fl+, (53)
, the tripping plate (64), the return spring (6 pieces) of the tripping plate (54), and the support shaft (56) that is inserted into the fixed shaft hole (62) of the hashidle (5) and supports the hashidle (6). ) and a frame that supports a shaft (57) that is inserted through the dry end of the tripping plate (54) and used as a turning point for the pulling plate (64). (5) is biased by a return spring having a spring force in the circumferential direction around the support shaft group, and the support shaft (56)
One leg of the link (51) is inserted into the movable shaft hole (68) extending in the direction of the shaft, and the other leg of the link (51) is connected to the swing board. Insert into the swing board
One leg of the link (51) is slidable within a length M (60) provided on the frame (59), and one end of the swinging plate is locked to the detachable plate 154). A freely adjustable receiving stage (61) is provided. A return spring (63) for returning the hashidle (5) to its original position is arranged around the support shaft, and a sensitivity adjustment screw for adjusting the sensitivity created by the removal plate (54) is provided on the removal plate width (1). (64) is screwed on.

On the other hand, the dissociation means (7) activates the above-mentioned tripping means (6) when an overcurrent flows in the electric circuit, and each contact (4) (
) Open 4' R magnet device (40), a zero-phase current transformer (41) that detects overcurrent flowing through the electrical circuit, and amplifies the output from this zero-phase current transformer (41) in the event of a current leakage to connect the electromagnet to the above-mentioned electromagnet. Device (4
It consists of an amplifier (43) for activating the circuit 0) and an earth leakage detection lock (44).

As shown in FIG. 3, the electromagnet device (40) includes a yoke (
The fixed iron core T4 is placed along the axial direction inside the coil frame (461, coil frame (46)) wrapped with a coil (4 wires).
7) and the return spring (pass through the flap and the movable iron core (49), one end of the force is fixed to the movable iron core (49), and the other end is the coil frame (49).
46) and an actuating plate (bo) facing the upper tripping plate 154). One end of the coil (421) is connected to the second fixed contact 01+ via a lead wire +:', 4, and the other end of the coil (421) is connected to the amplifier (
4(8) to the electrical circuit opposite to the electrical circuit having the second contact port among the pair of electrical circuits -C to the first contact plate 125
) and the output terminal (3), an overcurrent flows in the electrical circuit, and in response to the current, the current is induced in the zero-phase current transformer (41). When the current flows through the coil (42), the movable iron core (49) returns to the fixed iron core (47) and is attracted against the spring (63), pushing the actuating plate (5n) ω and pulling it. The first contact (4) and the second contact (support) which are in the closed state are opened by the removing means (6).

The leakage detection lock (44) is a zero-phase current transformer (41) through which the braided wire (28) in the n@electric circuit is formed by a ring-shaped iron core (70) and a coil (71) wound around it. ), and the currents flowing through each braided wire C → become unbalanced. In other words, when an overcurrent due to leakage flows into the electrical circuit, the current transformer (4)
It consists of an amplifier (13) that amplifies the secondary output generated in the coil Qυ of 1), a box (7 squares) that houses the zero-phase flow filter (41) and the amplifier (43), and the box ( 72) On the top surface is a resistor (7:3) for limiting the test current.
and a movable contact plate (74). This movable contact plate (74) is driven by several test buttons (10) mounted on the lid (16) to cause current to flow through the resistor (73). That is, the movable contact plate (74) and the resistor (73) constitute an operation confirmation means (8), and by pressing the test button (lO), both electric circuits are connected via the resistor (73). A large current flows through both roads. By this operation, an unbalanced current is generated in the zero-phase current transformer (41), and an operation test of the earth leakage detection block +44) is performed. As shown in FIG. 13, the death 1 to button (1o) are formed in a shape in which cylinders with different diameters are connected vertically on the same axis, and the lid 06
) is inserted into the through hole 03) formed in j. Test button (
1 (At the lower end of 11, there is a ti
A rectangular insertion hole 04) passing through in the diametrical direction is formed, and a locking rod 07) is inserted into this insertion hole 04)K.

This locking rod (one piece) protrudes from the lower surface of the lid (I6).
By locking the bottom surface of the test button (1), the test button (1) is stopped from being removed.

The protruding base 08) is formed into a substantially cylindrical shape, and a pair of protrusions (19) are formed at both ends in the diametrical direction on its lower surface.

By the way, as shown in FIG. 11, a locking piece X20) is protruded rearward at the upper end of the removal plate (54).

This locking piece is inserted into the test button (10) along with the locking rod (a, n) and the locking rod (Q), and constitutes a closure inhibiting means (1). When rotated, the locking rod (17) locks on the locking Kataoka and the removal plate (5
4) is pulled backwards, and the locking rod (11j is connected to the locking piece (
20) and the removal plate (54) is removed from the return spring (5).
It takes two states: one returns to the front due to the action of 5). In this way, for test 1, the first operation part (9) that presses the movable contact plate (74), and the second operation part (12) that is composed of the locking rod (I7) and moves the removal plate (51) are used. ) are formed, and each operation part +9) (121r and test button (1
0) operates independently by pressing and rotating operations.

Below, the operation of the earth leakage breaker having the above structure will be explained. Lid 06) If the handle (5) protruding from the top surface is raised upward and held in the first holding position, one end will be engaged with the receiving step (61) via the link (51) sliding in the long groove (60). The stopped swing plate (U2) presses the movable frame (53) at the other end, and as shown in FIG. is pressed so that each first movable contact (22) and each first fixed contact port 1) come into contact with each other, and at the same time, the second movable contact (30) contacts the second fixed contact port (1) and the first contact (4) and the second contact point is closed, the support shaft (56)
This state is maintained depending on the positional relationship with both ends of the switch (5).On the other hand, if a current leakage occurs in the closed state of and a small current flows momentarily, zero-phase current change (4) occurs. ) detects an unbalanced current, and the secondary output that is amplified by the amplifier (43) flows to the coil t12) of the electromagnet mounting (40), which drives the actuating plate (511) by 1 tL to the tripping plate β4). Tap the end of the eye. As a result, one end of the rocking plate comes off the receiving stage (61) of the removal plate (54), and as shown in FIG. As shown in FIG. 4, the valley first driven contact plate (22) returns to the second holding position due to its own spring force, and the hashidle (5) returns to the second holding position, and each of the first contact points (4) and The second contacts C and i'lJ are opened at the same time. When the electric circuit is opened in this way, the tripping plate (54) is activated by the return spring (depending on the situation).
It returns to the original position, and at this time, one end of the swinging J plate (52) that was held in place by contacting the stopper
Once it reaches 6υ, Hasidor (5) can be reintroduced. In addition, in the closed state, an overcurrent continues to flow tL,
In this case, the bimetal (27) bends due to self-heating and is pulled out and moved to close the pole in the same way. That is, → of the tripping plate is located at a connecting position where one end of the swinging plate (54) is accommodated in the receiving stage (61) so that the handle (5) and the first movable contact plate (5) are interlocked, and the swinging plate It is movable between the disengagement position where one end of the flip) is removed from the receiving stage @1) and the re-insertion of the hashidor (5) is prohibited. However, the test button (10)
Rotate the locking rod 071 to remove the locking plate (54) I
If it is locked to the F piece (?0) and the tripping plate (54) is moved to the above-mentioned release position, the handle (5) is held in the second holding position where the contact (4) is opened, and when it is re-inserted. is not held at the first holding position, and the contacts are not closed either. At this time, the locking rod 07) is moved as shown in FIG.
18) A protrusion 99) protruding from the lower surface is provided with a locking protrusion,
It is possible to prevent the puller 1 to the plate (54) from returning to the connecting position by the action of the return spring (5[i). That is, if the test button (10) is rotated to hold the tripping plate (5<) in the release position, the test button (10
) is locked in that position. If you turn the test button (lO) in the opposite direction, the locking rod (I7) will open as shown in Figure 14.
passes over the protrusion (I9), and the pull-out plate (54) is temporarily tightened to the connecting position. As shown in Figure 16, an arrow-shaped groove (3G) is formed on the exposed part of the outer periphery of the body (1) of Death 1 ~ Button Scream, and a tri-bar etc. can be inserted into this groove 136). You can now turn the death 1-button (10) to perform IIJ.

As described above, the present invention provides a closing inhibiting means for holding the tripping means in the disengaged position and prohibiting the opening/closing of the contact by the hashidle, and a test button equipped with a first operation part for actuating the operation confirmation means. A second operation part is provided for activating the closing inhibiting means, and by operating the test button, the tripping means is held in the disengaged position via the closing inhibiting means, and the closing inhibiting means is released and the tripping means is activated. 2 with the position that adds Shun% to the connected position
Since the second operating part is held in the same position, it is possible to set the state in which the contact does not close even if the hashidle is turned on.As a result, even if the hashidle is accidentally turned on while inspecting the circuit, the contact will close. This has the advantage that inspection work can be carried out safely without having to worry about any damage. In addition, the test button is provided with a second operation part, and the second operation part is operated to hold the release means in the disengaged position and the connected position, so there is no need to provide a complicated locking mechanism, and the number of parts is small and simple. It has the advantage of being able to prohibit the closing of contacts due to its simple structure.

[Brief explanation of drawings]

Fig. 1 is a vertical uJr i** diagram showing a conventional example, Fig. 2 is a partially omitted plan view showing an earth leakage sensor to which the same contact structure is applied, and Fig. 3 is a line A-A in Fig. 2. A cross-sectional view and FIG. 4 are taken along line B-B in FIG. 2 showing the internal structure when the contact is opened.
5 is a sectional view corresponding to line C-C in FIG. 2 showing the internal structure when the same as above is opened, and FIG. A sectional view corresponding to the line B-B in Fig. 2, Fig. 7 is a sectional view corresponding to the line C-C in Fig. 2 showing the internal structure at the time of closing the same as above, and Fig. 8 is a sectional view corresponding to the line C-C in the same as above. 9 is a partially omitted perspective view of the same as the above, and FIG. 10 is the opening/closing mechanism used in the above. FIG. 11 is an exploded perspective view of the entire IJIJ closing mechanism of the above, FIG. 12 is a perspective view of a detection block used in the same, FIG. 13 is a partially exploded perspective view of the vicinity of the test button of the same, and FIG. 15 and 15 are explanatory diagrams of the operation of the closure inhibiting means as described above, and FIG. 16 is a plan view of the same as the above with the lid attached, fl) is the body, (2) is the input terminal, and (3)
is the output terminal, (4) is the contact, (5) is the hasidor, (6)
(7) is the release means, (8) is the operation confirmation means, (9) is the first operating section, tloI is the test button, (1
(12) is a closing inhibiting means, and (12) is a second operating section. Fig. 1 Fig. 21'4 Fig. 3 Fig. 4＼ Fig. 5＼ 44 Fig. 6 25 Fig. 7 15 Fig. 8 Fig. 9 Fig. 10 Fig. 11 Fig. 12 Fig. 13 Fig. 16

Claims (1)

[Claims] (1) A hashidle that can be held in two positions: a second holding position formed between an input terminal and an output terminal provided on the device; a connection position that connects the contact and the hashidle so that they can interlock; the contact and the handle. A tripping means is movable between a dissociation position where the interlock is released and the contact is opened, and when an overcurrent flows through the electric circuit, the tripping means is moved to the release Mt & position. It has a dissociation means, an operation confirmation means for confirming that the tripping means operates normally by detecting a state in which an overcurrent is caused to flow in the electric circuit, and a first operation part for activating the operation confirmation means. It is equipped with a test button that exposes a part of the outer circumferential surface of the vessel to hot water, and a closing prohibition means that holds the trip means in the disengaged position independently of the disengagement means and prohibits the opening and closing of the contact by operating the hash. , the test button is provided with a second operating section that operates the closure inhibiting means independently of the first operating section;
By operating the test button, the second operation section holds the tripping means in the disengaged position via the closing inhibiting means, and returns the tripping means to the connected position by releasing the closing inhibiting means. An earth leakage breaker characterized by being held in two positions.