FI92002B - Locking device for preventing the connection of a circuit breaker - Google Patents

Abstract

The invention concerns a locking device to prevent the connection of a circuit breaker 1. The apparatus according to the invention comprises a locking device 2 constructed in connection with the circuit breaker, which locking device can be moved from a position which locks the operating lever 3 of the circuit breaker to a position which releases it, and vice versa, and which affects the operating lever of the circuit breaker in such a way that when it is a position which locks the operating lever 3 it prevents the rotational movement of the operating lever in relation to the casing of the circuit breaker 1. <IMAGE>

Description

92002

Locking device to prevent the circuit breaker from being switched on.

The present invention relates to a locking device for preventing the circuit breaker 5 from being switched on.

The circuit breaker, i.e. the so-called one of the main shortcomings of the circuit breaker observed in practice is the prevention of unintentional switching on. Unintentional switching on can occur, for example, as the electrical installation work progresses to the power connection point due to human error or even due to a body part or tool accidentally touching the safety board operating levers, and can result in electric shock, short-term material damage and other hazards.

15 A variety of locking pieces are available to lock the circuit breaker drive lever in place, but are not used by many electrical contractors because of the time it takes to install and remove, and they are an additional cost factor. As a result, various temporary solutions are often used in construction site conditions, if any, which results in poor occupational safety for installers and an increased risk of injury. Thus, there is a need to provide a simple and inexpensive solution to ensure that the circuit breaker is switched off, and thus to prevent unintentional switching on.

The object of the present invention is to provide a locking device for an automatic circuit breaker, by means of which the above-mentioned disadvantages are avoided. The locking device according to the invention is characterized in that the device consists of a locking member built in connection with the circuit breaker, which is movable from the locking position of the circuit breaker operating lever to the release position and vice versa, and which acts on the circuit breaker operating lever so that in the position-35 locking position of the operating lever prevents the rotation of the operating lever relative to the frame of the wire protection car.

The principle of the locking device according to the invention is thus a simple and reliable locking device which is an integral part of the circuit breaker. The developed 5 locking device can be easily added to existing, for example, DIN 35 rail-mounted circuit breakers without major manufacturing changes.

Preferred embodiments of the locking device according to the invention are characterized by what is stated in the claims below.

The invention will now be described in more detail by way of example with reference to the accompanying drawings, in which

Figures 1a and ib show a locking device according to an embodiment of the invention placed partly in section on the body of a circuit breaker shown, Figure 2 shows a front view of a circuit breaker according to Figure 1, Figures 3a and 3b show a locking device according to another embodiment of the invention.

Fig. 1a shows a locking device 2 according to the invention, partly in section, in the body of a circuit breaker 1 known per se, the circuit breaker being switched on. In this case, the operating lever 3 is turned upwards, whereby the current switch 4 of the circuit breaker switches the current to pass through the circuit breaker in a known manner.

Fig. 1b is a circuit breaker 1 according to Fig. 1a which is switched off, i.e. its operating lever 3 is either manually or after the circuit breaker has been triggered and pulled down by the return spring 5. This state of the circuit breaker, in which the current switch 4 cuts off the current path through the circuit breaker, can be ensured according to the invention by having a locking device rotatably arranged in the frame of the circuit breaker, which is a rotatable member with or without a tool. such as a locking screw 2 having an eccentric tip 6 at one end, which, when turned counterclockwise, strikes a corresponding groove 7 in the body of the operating lever 3. In this case, the operating lever 5 locks in position and the circuit breaker is switched off.

That is, the locking member according to the invention in this case consists of a locking pin 2 or the like rotatably mounted inside the casing of the circuit breaker, one end of which extends through an opening in the casing of the circuit breaker for switching the locking on and off, and the other end having a tip 6 or the like protruding from the pin extends in the vicinity of the operating lever body of the circuit breaker so that by turning the locking pin 15 when the operating lever is in the off position, the tip of the pin moves into a correspondingly formed notch 7 in the operating lever body.

The locking device according to the invention can be easily added to most circuit breakers to be mounted on a DIN 35 rail. The housing of the circuit breaker l can also be provided with openings marked L (lock) and F (free) in Fig. 2, from which the locking state can be seen. The state of the locking status indicator can be distinguished 25, e.g. by color codes painted on the tip 6, which are visible from said openings.

The tripping of the circuit breaker is not affected in any way by the locking device according to the invention. If necessary, the locking can be supplemented, for example, with a lever mechanism *: 30 so that the switched-on circuit breaker trips to the neutral position when the locking screw is turned.

Another embodiment of the invention is shown on an enlarged scale in Figures 3a and 3b. There, the locking device consists of an inwardly pressing locking button 35 8 or the like. When the locking button is in its out position ... Γ .___ 92002 4 (Fig. 3a), it acts as a control lever for the circuit breaker in the normal way. In the switched-off position of the circuit breaker, when the locking button 8 is pressed in (Fig. 3b), the locking button remains in place locked behind the abutment surface of the nail 9 or the like in the housing of the circuit breaker 5. Preferably, the fixed axis of rotation 10 of the drive lever has a groove or slot 11 in the neutral position. When the locking button 8 is pressed in the locking position, the elongate additional locking member 10 12 belonging to the locking button extending inside the operating lever extends into the slot 11 in the fixed axis of rotation of the operating lever, the operating lever 8 of the automatic circuit breaker

The depressed lock button can be returned to the normal-15 liters either using some known resetting mechanism or tool, or most simply by pulling with your fingers.

It will be apparent to those skilled in the art that the invention is not limited to the examples set forth above, but that different embodiments of the invention may vary within the scope of the claims below.

Claims (4)

1. A reading device for preventing point coupling of a circuit breaker (1), characterized in that the device consists of a reading means (2; 8) constructed in connection with the circuit breaker, which can be displaced from a position which reads the circuit breaker control lever (3; 8). to the same releasing position and vice versa, which actuates the control fuse's control lever so that in the position reading the control lever (3; 8) it prevents the control lever from rotating in relation to the body of the automatic fuse (1). 2. A reading device according to claim 1, characterized in that the reading means consists of a reading pin (2) or similar pivotally arranged inside the automatic fuse housing, one end of which extends through an opening in the automatic fuse housing for coupling or friction of the the reading, and the other end of which has a protruding protruding tip (6) or the like, extends to the proximity of the body of the automatic fuse manifold (3), so that when the reading pin is rotated when the control lever is in its friction-coupled position, the tip of the pin in a recess (7) or the like made in the frame of the control lever (3), and the control lever (3) is read in place. 3. A reading device according to claim 1, characterized in that the reading means consists of a reading button (8) or the like operating as an automatic locking actuator, which can be displaced between an inner and an outer position, which actuating lever (8) is located when pressed. in the cut-off position, can be read in place form-read with a counterpart (9) located in the body of the automatic fuse, and the control fuse (8) of the automatic fuse can be released by bringing the read button (8) into the outer position by pressing or pulling out . 4. A reading device according to claim 3, characterized in that the reading button (8) comprises a 92002 extending elongate extension reading means (12) into the operating lever which extends in the reading button's Iastä position in a cutting (11) or the like in the fixed control lever. rotary shaft (10), wherein the control lever (8) of the automatic fuse is read in relation to the frame of the automatic fuse and the shaft (10) of the control lever.