FI92002C - Locking device to prevent the circuit breaker from being switched on - Google Patents

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 biggest shortcomings in the operation of the circuit breaker 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 inadvertently touching the control panel operating levers, resulting in electric shock to the installer. .

15 Various locking pieces are available to lock the operating lever of the circuit breaker, but many electric contractors do not use them because they take time to install and remove, and they also constitute an additional cost factor. This leads to the fact that different spatial solutions are often used in working conditions, even if they are used, in which case the occupational safety of the installers is poor and the risk of damage increases. 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 a circuit breaker, which can be moved from the locking position of the circuit breaker operating lever to the position releasing it and vice versa, and thus acts on the circuit breaker. in the position-35 locking position of the operating lever, the wire protection of the operating lever relative to the ground frame of the car is prevented.

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 circuit breakers, eg mounted on a DIN 35 rail, without major technical 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 1b 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 circuit breaker according to Figure 1 seen from the front, Figures 3a and 3b show another embodiment of the invention 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 upside down, whereby the power switch 4 of the circuit breaker switches the current to pass through the circuit breaker in a known manner.

Fig. 1b is a line circuit breaker 1 according to Fig. 1a which is switched off, i.e. its operating lever 3 is either released after the hand or the circuit breaker and is pulled down by pulling 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 pivotally arranged in the frame of the circuit breaker, which is rotatable on the outside of the housing. such as a locking screw 2, the other end of which has an eccentric candy 6 which, when rotated counterclockwise, hits the corresponding groove 7 in the body of the operating lever 3. Otherwise, the operating lever is locked in position 5 and the circuit breaker is switched off.

In other words, the locking member according to the invention consists in this case of a locking pin 2 or corresponding to a locking pin rotatably mounted inside the casing of the circuit breaker, one end of which extends through the opening in the casing of the circuit breaker for activating and deactivating the lock. having a pin 6 or the like protruding from the pin extends in the vicinity of the operating lever body of the circuit breaker such that by rotating the locking pin 15 with the operating lever in the off position, the pin candy moves into the correspondingly formed notch 7 in the operating lever body.

The locking device according to the invention is easily added to most of the circuit breakers to be mounted on a DIN 35 rail. The openings marked L (lock) and F (free) in Fig. 2 can also be made in the housing of the circuit breaker l, from which the locking state can be seen. The state of the lock status indicator can be distinguished 25, for example, by the 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 depressing locking button 35 8 or the like. When the lock 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 in a form-locked manner behind the abutment surface of the nail 9 or the like in the housing of the circuit breaker 5. Preferably, the fixed rotary shaft 10 of the operating lever has a groove or slot 11 at the neutral position. When the locking button 8 is pressed in the locking position, the elongate auxiliary locking member 10 12 belonging to the locking button extending inside the operating lever extends into the slot 11 in the fixed rotary shaft 10 of the operating lever, whereby

The depressed locking button can be returned to the normal-15 liters either using some known return mechanism or tool, or 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 the various embodiments of the invention may vary within the scope of the appended claims.

Claims (4)

92002 Patented suction Locking device for preventing the automatic circuit breaker (1) from being switched on, characterized in that the device consists of a locking element (2; 8) built in connection with the automatic circuit breaker and movable from the locking position (3; 8) of the automatic circuit breaker. to the release position and vice versa, and which acts on the operating lever of the circuit breaker in such a way that in the locking position of the operating lever 10 (3; 8) it prevents the rotation of the operating lever relative to the frame of the circuit breaker (1). Locking device according to claim 1, characterized in that the locking member consists of 15 locking pins (2) or the like rotatably mounted inside the casing of the circuit breaker, the other end of which extends through an opening in the casing of the circuit breaker for switching the locking on and off, and one end of which having a pin (6) projecting from the pin or the like extends into the ridge of the body 1S-20 of the operating lever (3) of the circuit breaker by rotating the locking pin with the operating lever in the disengaged position, whereby the pin tip moves into the drive lever correspondingly formed notch (7) or the like, and the operating lever (3) locks in place. • · Locking device according to Claim 1, characterized in that the locking element consists of a locking button (8) which can be moved as an operating lever of the circuit breaker and can be moved to the inner and outer position, or the like, which can be locked in place when pressed in the off position. with a stop (9) in the body of the circuit breaker, and by releasing the locking button (8) to the outer position either by pressing or pulling it out, the operating lever (8) of the circuit breaker can be released. 92002 Locking device according to claim 3, characterized in that the locking button (8) comprises an elongate additional locking member (12) extending inside the operating lever, which in the locked position of the locking button extends into a slot (11) or the like in the fixed rotation shaft (10) of the operating lever, the automatic operating lever (8) is locked with respect to both the circuit breaker body and the operating lever shaft (10). 11 92002