CN1180450C - Differential electrical protection device - Google Patents

Abstract

A differential electric protection device, including an open/close mechanism (4) of contacting components (5,6) and a differential trip (2) which is mounted on a data processing electronic card (3), contacting components are hold in a closed position by a lock system (25,27) locked via a tripping component, and pressed to a turn off position by a spring (19) to be placed into a housing (18) after tripping. Two ends of the spring support a wall of the main body and the shaft of moveable contacting components respectively. An aperture (21) in the main body enables a spring (19) to be placed into a housing (18) after installed in the main body (1) which assembles with differential trip and a prefixing card (3) of the mechanism (4).

Description

Differential electrical protection device

technical field

The invention relates to a differential electrical protection device, in particular to a switch, which is installed in an insulating casing including a main body and a cover.

Background technique

This switch includes a contact opening and closing mechanism actuated by a handle, and also includes a trip piece that can be activated by a release and is mechanically connected to the opening and closing mechanism when the protected circuit has an insulation fault to make the contact A differential trip unit with disconnected parts, said trip part being mounted on a data processing electronic board, the movable contact(s) of the device being held in a closed position by a locking system capable of Unlocked by actuation of the release, the movable contact, after release, is biased towards an off position by a spring housed in a housing belonging to said main body. The two ends of the spring are respectively supported on a wall of the main body and on a shaft supporting the movable contact(s).

In the known above-mentioned differential switches, the basic structure of the device cannot be equipped with a board including the electronic circuit with auxiliary power supply and equipped with the differential release and the opening and closing mechanism of the contacts. In these devices, in fact, it is necessary to install the contact breaking spring in the main body before assembling the contact opening and closing mechanism, therefore, the contact support shaft must be assembled against the force of the spring, which increases the complexity of assembly. sex, and has resulted in an electronic board that is pre-connected to the contact opening and closing mechanism and cannot be loaded into the body of the device.

The present invention solves this problem and proposes a differential switch that is relatively simple to assemble.

To this end, the object of the present invention is to obtain a differential electrical protection device, such as a switch, which is characterized in that the body of the device comprises a hole enabling the spring to be mounted on said plate in the housing of the device. The main body is then inserted into the above-mentioned housing, and the plate is equipped with a differential release and is pre-fixed with a contact opening and closing mechanism.

According to a particular embodiment, the housing of the device comprises a front panel, which provides, on each side of a raised portion covering the above-mentioned opening and closing mechanism, two connection surfaces housing the connection terminals of the device, such a device The feature of the present invention is that: the above-mentioned hole for inserting the spring is located at the intersection of one of the above-mentioned two connection surfaces and the above-mentioned protrusion.

According to a particular feature, said opening and closing mechanism is supported by a flange comprising clamping elements that cooperate with complementary clamping elements on the body after said opening and closing mechanism has been mounted on the plate , at least partially fix the opening and closing mechanism on the main body.

According to another particular feature, the housing of the solenoid is arranged relative to the plate in such a way that it cooperates with the wall of the body to provide insulation between the primary ribbon cables directly connecting the movable contact to the output terminals .

Another specific feature is that the opening and closing mechanism of the above-mentioned contact element is fixed by being inserted on the board.

Other features and advantages of the present invention will appear more clearly from the following detailed description of the invention with reference to the accompanying drawings, which are given for the purpose of illustration only.

Description of drawings

Figure 1 is a perspective view showing on the one hand an electronic board equipped with a differential release and on the other hand a contact opening and closing mechanism, the release being assembled on the board previous state,

Figure 2 is a perspective view showing the assembly of an electronic board housing both a mechanism for opening and closing the contacts and a differential release within the body of the device,

Figure 3 is a perspective view of the same device in the assembled position without the trip spring installed in the main body,

Figure 4 is a longitudinal sectional view parallel to the main plane of the device, showing the internal components of the device,

Figure 5 is also a longitudinal section, but this longitudinal section is perpendicular to the main plane of the device.

Detailed ways

An electronic differential switch can be seen in FIGS. 2 to 5 , which is designed for use in a power supply system in order to protect the latter against ground insulation faults. This device is housed in a manner known per se in a substantially hexahedral housing comprising a body 1 and a cover (not visible in the figures). As can be seen particularly clearly in FIG. 1, the switch comprises a differential release 2 and a mechanism 4 for opening and closing contacts 5, 6 mounted on an electronic board 3 on which Includes an electronic processing circuit with auxiliary power supply. This assembly is housed in a chamber 7 (Fig. 2) of the main body 1 of the switch's insulating housing designed to house an input connection terminal 8 and an output connection terminal 9 to form a differential switch D.

The differential release 2 comprises a summing transformer 10 and an electromagnetic release relay 11 in a manner known per se. The summing transformer 10 constitutes a differential current detector and is provided with a magnetic circuit in the form of a solenoid 12 having a central hole 13, a primary winding 14 formed by the supply conductors of the low voltage power system to be protected. , 15 can pass through the hole. A pole winding 16 is wound on the solenoid 12 and is electrically connected to a measuring resistor of the electronic circuit.

The electromagnetic trip relay 11 is formed by an actuator with a shunt release coil 17 . The tubular coil 17 is supported by a support and comprises, in a known manner, in a bore a movable magnetic core (not visible in the figure) coupled to an actuator. The coil of the relay is connected to the two terminals of the circuit.

Referring to Figures 2 to 4, it can be seen that the main body 1 of the housing comprises a housing 18 designed to receive a spring, called a trip spring, able to move the movable contacts 5, 6 after tripping of the device. Press toward the off position. As can be seen from FIG. 4, in operation, the spring 19 is supported by its two opposite ends 19a and 19b on a wall 1a of the main body 1 of the housing and on a wall 1a supporting the movable contacts 5 and 6, respectively. The contact is supported on shaft 20 of the shaft. According to the invention, the casing 18 provides an accessible hole 21 positioned so that the spring 19 can be assembled after the assembly consisting of the plate 3 equipped with the opening and closing mechanism 4 and the release 2 has been installed in the body 1 . According to a particular embodiment of the invention, the hole 21 is positioned at the junction of the raised portion ( FIG. 4 ) housing the opening and closing mechanism 4 and one 22 of the connecting surfaces 22 , 23 .

The device was assembled as follows. First, the primary wires 14 and 15 are passed through the solenoid 12 (FIG. 5). The primary coils 14 and 15 are connected by one of their ends 14a and 15a respectively to the output connection terminal of the device and by their opposite ends 14b and 15b respectively to the two movable contacts 5 and 6 . Then the contact opening and closing mechanism 4 is plugged or slotted on the board 3 ( FIG. 1 ), and this assembly is inserted into the hole of the main body 1 . By means of a locking member 25 on the flange 26 supporting the mechanism 4 (which cooperates with a complementary clamping member 27 on the main body 1), the mechanism 4 is clamped on the main body 1, while passing through the respectively provided Bolts (not shown) with two holes 30 and 31 in the flange 26 and the body 1 secure this assembly to the body 1 . The disconnecting spring 19 can then be inserted (position b) into the casing 18 of the body 1 through the hole 21 provided on the body 1, as can be seen more clearly in FIG. 4, up to the position indicated by (a). In this position (a), the spring 19 is supported on the wall 1 a belonging to the main body 1 and on the contact support shaft 20 .

In this position, see in particular FIG. 5 , the casing 29 of the solenoid 12 is arranged relative to the plate 3 such that the casing 29 cooperates with the wall 28 of the body 1 to obtain a direct connection of the movable contacts 5 and 6 . Insulation between the primary flat cables 14, 15 at the output connection terminal 9 of the device. Insulation between the movable conductors 14 and 15 is thus obtained at the lowest cost.

Thus, with the present invention, it is not necessary to assemble the contact opening and closing springs before the contact opening and closing mechanism, which results in a relatively easy assembly of the switch, since the main body can receive an electronic board pre-connected to the contact opening and closing mechanism, therefore, comprising All differential functions.

The invention is of course not limited to what has been described and illustrated above for purposes of example only. The invention is applicable to both switches and circuit breakers.

The present invention includes all technical equivalents of the above devices, as well as combinations thereof, as long as the latter are made in accordance with the spirit of the present invention.

Claims (5)

1. differential electric protective device; be contained in the insulation shell that comprises a main body and a lid; comprise a contact switching mechanism by the handle actuating; thereby comprise that also one can activate and mechanically be connected in the differential release that described switching mechanism disconnects contact by a dropout part when insulation fault appears in protected circuit; above-mentioned dropout part is installed in a blocks of data and handles on the electron plate; the movable contact of described device remains on a make position by a locking system; this locking device can the release by the actuating of above-mentioned dropout part; the spring that is installed in the housing that belongs to described main body after described contact is threaded off is pressed to an open position; the two ends of described spring are supported on the wall of main body respectively and are supporting on the axle of movable contact

It is characterized in that: aforementioned body (1) comprises a hole (21), this hole makes above-mentioned spring (19) can insert above-mentioned housing (18), contact switching mechanism (4) on described plate (3) predetermined fixed after the described plate (3) that differential release (2) is housed is contained in the main body (1) of device case.

2. device as claimed in claim 1, it is characterized in that: the housing of described device comprises the joint face (22,23) of two splicing ears (8,9) that cover device and the bossing (S) that covers above-mentioned switching mechanism (4), above-mentioned bossing is protruding between two joint faces and between two joint faces, and the above-mentioned hole (21) that is used for inserting spring (19) is positioned at a joint face (22) of above-mentioned two joint faces (22,23) and the intersection of above-mentioned bossing (S).

3. as the device of claim 1 or 2, it is characterized in that: said mechanism (4) is supported by a flange (26), this flange comprises locking piece (25), after described mechanism (4) is contained on the plate (3), the clamping element (27) of the complementation on this locking piece and the main body (1) cooperates, and described switching mechanism (4) is fixed on the main body (1) to small part.

4. device as claimed in claim 1 is characterized in that: above-mentioned switching mechanism (4) is upward fixed by being inserted in plate (3).

5. device as claimed in claim 1, it is characterized in that: the main body of described device case (1) comprises the case (29) that covers solenoid (12), case (29) cooperates with the wall (28) of main body (1) to make between the elementary flat cable (14,15) mutually and isolates, so that the insulation between the direct elementary flat cable (14,15) that movable contact (5,6) is connected in described device lead-out terminal (9) to be provided.

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