CN1227699C - Couplable protective switchgear - Google Patents

Abstract

The invention relates to a circuit breaker (1) that is designed to be added to an auxiliary device with auxiliary functions, such as a residual current operated device or an undervoltage circuit breaker. Said auxiliary device brings about a switch-off coupling by means of a catch (2). Said circuit breaker comprises a zone of latching between a latch (3) and a trip lever (4). According to the invention, the catch (2), in a switch-off position of the auxiliary device, directly or indirectly displaces a spacer element (5) that spaces the latch (3) apart from the trip lever (4) and prevents the latching.

Description

Couplable protective switchgear

technical field

The present invention relates to a protective switchgear (US3,973,230).

Background technique

In the case of a fault current circuit breaker connected to a protective switching device, for example a line circuit breaker, it is ensured that the protective switching device cannot be switched on when the fault current circuit breaker is not switched on and is therefore inoperative. With many devices available on the market, some approaching of the protective switching device contacts is permitted before the protective switching device is re-disengaged by a release switch lock when the coupled fault current circuit breaker is in the off position.

Contents of the invention

The object of the present invention is to develop a couplable protective switching device in which contact contact cannot be approached when an attempt is made to switch on the protective switching device when the connected fault current circuit breaker is in the off position.

The object of the present invention is achieved by a protective switchgear as follows. That is, it is designed to connect an accessory with an additional function, which acts as a decoupling via a thumbwheel, said protective switchgear having a point of contact between the jaw and the trip lever , wherein the dial is rotatably supported; the dial constitutes an eccentric wheel; and a spacer element is provided. wherein, in the disconnected position of the connected accessory, the spacer element is arranged directly or indirectly with one of its lever arms at a distance between the pawl and the trip lever, and wherein the dial acts as the other of the eccentric wheel and the spacer element. One lever arm contacts, whereby the lever arm is deflected by a distance and thus prevents contact.

In the event that a connected fault current circuit breaker is in the OFF position and an attempt is made to switch on the protective switching device, contact access is prevented. This prevents possible hazards caused by arcing of the contacts. In the event that a connected fault current circuit breaker has already tripped and has been turned into the off position, the protective switching device can completely prevent the possibility of being switched on again by the coupled protective switching device. In the event of an attempt to reconnect, no contact approach occurs.

The protective switching device has a dial, which guides a separate spacer element with its movement, and an advantageous configuration of the protective switching device can be achieved by a switch lock having the following structure: the claw of the switch lock changes in one position A moving contact rod is guided directly or indirectly on the bearing of the The trip lever is arranged on a fixed bearing and supports the movable contact lever in the disconnected position of the manual actuation mechanism. A coupling rod of the rotatable manual actuation mechanism is connected to the pawl on another position-variable bearing.

In particular, the spacer element can be arranged rotatably on the pawl around the bearing of the coupling lever, wherein, in the off position of the dial and the off position of the protective switching device, the spacer element bears against the trip lever and prevents the connection.

According to another configuration, for the switch lock described above, the thumb wheel is arranged outside the geometric track of the coupling rod and the pawl bearing.

Advantageously, the dial forms an eccentric which deflects the spacer element, wherein the spacer element can be formed by a two-armed lever, one of which can bear against the trip lever at a distance, while the fault current protection switch In the disconnected position, the dial acts deflectively on the other lever arm of the spacer element.

It is advantageous for highly mechanized processing to design the usual spring elements required for a protective switching device as leaf springs. This leaf spring can be manufactured and assembled very well on a processing line at high speed. The protective switching device described above also has the advantage of being compatible with existing product series on the market.

Description of drawings

The invention will now be described in detail with the aid of an exemplary embodiment shown in the drawings. In the figure,

Fig. 1 shows the protection switch device of the present invention,

Fig. 2 shows that the protection switching device is in the disconnected position on a position of the dial in the view mode of Fig. 1,

Figure 3 shows the protective switching device in the ON position, and

The main structural components of the device shown in FIGS. 1 to 3 are shown in FIG. 4 in an exploded view.

Detailed ways

The protective switch device located in the housing indicated by the dotted line in FIG. 1 has a switch lock, a contact pair, a rotatable manual actuation mechanism and a thumbwheel. However, the release, the electromechanical structure and the thermal structure are the same as the usual contact springs and switching springs and are not shown for the sake of clarity. In Figure 1 it can be seen how contacting is prevented in the open position with tripping of the connected fault current switch.

In FIG. 2, in the view of FIG. 1, the protective switching device is shown in the off position in a position of the dial, when switching on an auxiliary device, such as a fault current circuit breaker or without series connection and possible With an attached fault current circuit breaker, the dial is in its rest position.

FIG. 3 shows the protective switching device in the ON position.

The main structural components of the device shown in FIGS. 1 to 3 are shown in an exploded view in FIG. 4 .

The circuit breaker arrangement 1 shown in FIG. 1 is designed to be able to be connected, for example, to an auxiliary device, such as a fault current circuit breaker, which is supposedly located behind the drawing. The dial 2 plays the role of decoupling with the connected fault current protection switch. The protective switching device 1 has a point of contact between the pawl 3 and the trip bar 4 . When a fault current circuit breaker is in the OFF position, the thumb wheel 2 directly or indirectly moves a spacer element 5 which creates a distance between the pawl 3 and the trip lever 4 , thereby preventing contact. In the embodiment shown in FIG. 1 , the thumb wheel 2 acts directly on the spacer element 5 producing the spacer via a cam 6 acting as an eccentric when it is rotated counterclockwise by approximately 70°. The spacer element 5 manufactured at a distance in this embodiment keeps the trip bar 4 away from the contact shoulder 7 so that it cannot make contact.

According to the configuration shown in FIG. 1 , the claw 3 guides the movable contact rod 9 in a position-variable bearing 8 , and in the exemplary embodiment directly. The trip lever 4 is arranged on a stationary bearing 10 . In the disconnected position of the manual actuation mechanism 13 , the shaft 10 of the trip lever 4 supports the movable contact lever 9 in a partial cutout 11 shown in FIG. 4 . The jaw 3 is connected via a coupling rod 12 to a rotatable manual actuation mechanism 13 on its other position-variable bearing. In the embodiment shown in FIG. 1 , the thumbwheel 2 guides the movement of a separate spacer element 5 . The movable contact rod 9 and the static contact 15 form a pair of contacts, and the contact pair actually has a movable contact 16 .

It is shown in FIG. 1 that when the fault current protection switch has been activated, the dial 2 is in the disconnected position caused by the fault current protection switch. The protective switching device 1 is now also in the open position. In FIG. 2 , it is shown that the dial 2 is in the rest position and the fault current protection switch has not tripped yet. In FIG. 2 , the protection switch device is in the disconnected position under the action of the manual operating mechanism 13 . FIG. 3 shows that the protective switching device 1 is in the ON position when the thumb wheel 2 is in the rest position and the fault current circuit breaker has not yet tripped.

The spacer element 5 is arranged rotatably on the jaw 3 about a bearing 14 for the coupling rod 12 . According to FIG. 1 , in the off position of the thumb wheel 2 and in the off position of the protective switching device, contact is prevented by a spacer element 5 which, in the embodiment shown in FIG. 1 , rests against the trip lever 4 in the off position and prevent contact.

According to a further development, the thumb wheel 2 shown in FIGS. 1 to 3 is arranged outside and above the geometric path of the coupling rod 12 and the jaw bearings 8 , 14 . In this case, being located on the upper side is correspondingly understood to mean that the contact point 16 on the movable contact rod 9 is located on the lower side as it appears. By arranging the thumb wheel 2 outside the geometric track, compatibility can be obtained for different device structure series.

In the simplest case, the thumbwheel 2 can form an eccentric which acts on the spacer element 5 of the two-arm structure. A lever arm 17 of the spacer element 5 bears against the trip lever 4 and keeps the pawl 3 at a distance from the trip lever 4 . In the open position of the fault current circuit breaker, the dial 2 rests with its cam 6 or with its eccentric contour deflection against the other lever arm 18 of the spacer element 5 . The position-variable bearing 8 of the claw 3 is connected to the fixed-position bearing 10 of the trip lever 4 via a coupling mechanism 19 , which in the present embodiment has a bow-shaped structure.

For the sake of simplicity, the usual spring elements for contact force, power storage and manual actuation have been omitted from FIGS. 1 to 4 . For high-speed machining, it is advantageous to design the spring as a leaf spring, as is already known.

Claims (6)

1. a protection switch device (1); it is designed to connect an attached device with additional function, and this attached device plays by a thumb wheel (2) and disconnects the effect that is coupled, and described protection switch device has a contact point between claw (3) and release lever (4); it is characterized in that

Described thumb wheel (2) is rotatably mounted,

Described thumb wheel (2) constitutes an eccentric wheel,

Be provided with a spacer element (5),

Wherein, at the open position of attached device of connect, spacer element (5) is arranged between claw (3) and the release lever (4) with an one lever arm (17) directly or indirectly with making spacing,

Wherein, thumb wheel (2) contacts with another lever arm (18) of spacer element (5) as eccentric wheel, makes lever arm (17) make spacing ground deflection and stop thus thus and contacts.

2. protection switch device as claimed in claim 1; it is characterized in that a switch lock; its claw (3) is guided a moving contact lever (9) directly or indirectly on the bearing (8) of a change in location; the bearing (10) that its release lever (4) then is arranged on a fixed-site upward and in the open position support of manual control mechanism (13) moves contact lever; wherein; the bar (12) that is coupled that is used to be coupled rotating manual control mechanism (13) is gone up at the bearing (14) of another change in location and is connected with claw (3); wherein, thumb wheel (2) is with one of its movement guide spacer element (5) independently.

3. protection switch device as claimed in claim 2; it is characterized in that; described spacer element (5) is arranged on the claw (3) rotationally around the bearing (14) that is coupled bar (12); at the open position of thumb wheel (2) and the open position of protection switch device, spacer element (5) leans at release lever (4) and upward stops claw (3) to contact with release lever (4).

4. protection switch device as claimed in claim 3; it is characterized in that; when the contact (16) on the moving contact lever (9) look be positioned at below the time, described thumb wheel (2) is arranged on the top of locus of the bearing (14) of the bearing (8) that is coupled bar (12), change in location and another change in location.

5. protection switch device as claimed in claim 4; it is characterized in that; described thumb wheel (2) constitutes an eccentric wheel; this eccentric wheel deflection spacer element (5); wherein, spacer element is made of two armed levers, and an one lever arm (17) leans on release lever with can making spacing; and, act on another lever arm (18) of spacer element (5) to thumb wheel (2) deflection at the open position of failure current protection switch.

6. protection switch device as claimed in claim 1 is characterized in that, described attached device is a failure current protection switch or under-voltage release.

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