Drive mechanism for medium voltage fuse switches

FIELD: machine building.

SUBSTANCE: invention refers to a drive mechanism. A drive mechanism for a medium voltage fuse switch comprises a base plate (10) and a front plate (11) which form an inner space enveloping a working shaft and a driving shaft set coaxially along the first longitudinal axis, the driving shaft is functionally coupled with a kinematic circuit of the medium voltage fuse switch, the working shaft (20) is fitted by a head connected to an operating handle for manual actuation of the working shaft, a spring unit consisting of two spiral springs having the first end functionally coupled with the working shaft, a clamping unit consisting of two clamping tabs set on the driving shaft, the first (61) and the second (62) unclamping units to unclamp the driving shaft and provide for its rotation. The first unclamping unit (61) provides for the rotation of the driving shaft in the direction opposite to the second unclamping unit (62).

EFFECT: reduced manufacturing, mounting and operational costs.

11 cl, 8 dwg

 

The present invention relates to a drive mechanism for a circuit breaker medium voltage, in particular the drive mechanism for a circuit breaker with a fuse medium voltage having improved characteristics. For the purposes of this application the term medium voltage refers to applications in the range from 1 to 52 kV.

Circuit breakers medium voltage, in particular switches with fuse medium voltage are well known in the field of technology and, as a rule, contain a drive mechanism, which is connected with the kinematic chain breaker and affects him for the opening and closing of the switch contacts. Performance required to perform the operation of opening/closure, mechanical means, as a rule, are used to actuate the kinematic chain switch. In most cases, the drivers based on the springs, which are stressed to perform the operation of opening/closure; when the spring expands, the drive mechanism transfers energy and momentum created by the spring on the kinematic chain of the switch, whereby operation of the opening/closure with the required performance. In the mechanism of known type operation, usually performed by the operator impacts is relevant to the handle, which is used for loading the springs and operation of unclamping the spring ends whereby the operation of the opening/closure.

The document US 4683357 And discloses a drive mechanism for a circuit breaker with a fuse medium voltage containing:

- the base plate and the front plate forming the inner space containing the working shaft and the drive shaft, coaxially mounted along the first longitudinal axis, with the drive shaft configured to connect with a kinematic chain breaker with a fuse medium voltage for the operation of the opening/closing switch, the working shaft has a head connected to the handle for manual actuation of the working shaft;

- node springs, which contains the first and second coil springs having a first end connected with the working shaft, while the coil spring is made with the possibility of loading by rotation of the working shaft and the driving shaft when unclamping, the first spiral spring made with the possibility of rotation of the drive shaft in the opposite direction to the rotation specified by the second spiral spring;

- clamping means for clamping the drive shaft, containing the first and second clamping legs, located on the drive shaft;

the first and the second decompresses means for unclamping the drive shaft and allow its rotation, while the first decompresses the tool is made with the possibility of rotation of the drive shaft in the opposite direction relative to the second means decompresses.

Although currently known drivers undoubtedly are suitable to control the operation of the opening/closing switch, medium voltage, they are not fully satisfactory from the standpoint of performance and/or cost of manufacture.

In particular, in the case of the drive mechanism for switches with fuse medium voltage would be desirable to have a simpler alternative to the existing system.

An additional problem arises due to the speed requirements of the operation of opening/closing a switch, which includes the exact sizing of the spring, and thorough testing.

Also, the characteristics of the spring can be changed during the service life, whereby reducing the speed performance of the associated switch to values that are no longer valid.

Therefore, the aim of the present invention is to provide a drive mechanism for a switch with the one voltage, in particular the drive mechanism for a circuit breaker with a fuse medium voltage, in which the aforementioned disadvantages are avoided or at least reduced.

An additional objective of the present invention is to provide a drive mechanism for a circuit breaker medium voltage, which does not require excessive precision dimensioning and pilot spring.

Another objective of the present invention is to provide a drive mechanism for a circuit breaker medium voltage, which provides the ability to configure the characteristics of the spring and its adaptation for use in a simple way.

An additional objective of the present invention is to provide a drive mechanism for a circuit breaker medium voltage, which is simply adaptable to different applications.

Still another objective of the present invention is to provide a drive mechanism for a circuit breaker medium voltage with reduced production, installation and operating costs.

Thus, the present invention relates to a drive mechanism for a circuit breaker with a fuse medium voltage, which differs in that it contains:

- the base plate and the front plate forming the inner space is nstwo, enclosing the working shaft and the drive shaft, coaxially mounted along the first longitudinal axis, with the drive shaft configured to connect with a kinematic chain breaker with a fuse medium voltage for the operation of the opening/closing switch, the working shaft has a head connected to the handle for manual actuation of the working shaft;

- node springs, which contains the first and second coil springs having a first end connected with the working shaft, while the coil spring is made with the possibility of loading by rotation of the working shaft and the driving shaft when unclamping, the first spiral spring made with the possibility of rotation of the drive shaft in the opposite direction to the rotation specified by the second spiral spring;

- clamping means for clamping the drive shaft, containing the first and second clamping legs, located on the drive shaft;

the first and the second decompresses means for unclamping the drive shaft and allow its rotation, while the first decompresses the tool is made with the possibility of rotation of the drive shaft in the opposite direction relative to the second means decompresses, PR is working shaft includes the first sub-node, contains the drive, installed perpendicular relative to the first longitudinal axis, and optionally containing the first plate element, protruding perpendicularly from the edge of the disc in the direction of the head of the working shaft.

Due to the presence of clamping and decompresses means, drive mechanism for a circuit breaker medium voltage in accordance with the invention allows to perform the operation of opening and closing very simple and efficient, as better explained in the following detailed description of preferred embodiments of the invention.

Switch medium voltage containing a drive mechanism, as described above, is also part of the present invention.

Additional features and advantages of the invention will be clear from the description of preferred but non-exclusive embodiments of a drive mechanism for a circuit breaker with a fuse medium voltage in accordance with the invention, non-exclusive examples of which are proposed on the attached drawings, on which:

Fig. 1 is a perspective front view of the possible variants of implementation of the drive mechanism in accordance with the invention;

Fig. 2 is a perspective rear view of a possible form of implementation of the drive mechanism in the accordance with the invention;

Fig. 3 is a top view of a variant of implementation of the working shaft, drive shaft, and a host of springs used in the drive mechanism in accordance with the invention;

Fig. 4 is a view from the separation of the components of the unit of Fig. 3;

Fig. 5 is a rear view of the drive mechanism in accordance with the invention, with the clamping and decompresses means in the first operating position;

Fig. 6 is a rear view of the drive mechanism according to Fig. 5, with the clamping and decompresses means in the second operating position;

Fig. 7 is a rear view of the drive mechanism according to Fig. 5, with the clamping and decompresses means in the third operating position;

Fig. 8 is a rear view of the drive mechanism according to Fig. 5, with the clamping and decompresses means in the fourth operating position.

With reference to the accompanying figures, the drive mechanism for a circuit breaker with a fuse medium voltage in accordance with the invention, generally denoted by reference number 1, generally includes a base plate 10 and the front plate 11, which form an internal space. Additional plates, for example plate 13 can also take place between the front 11 and the base plate 10. The drive mechanism also includes a number of constituent cell battery (included) is tov for its accession to the switch, medium voltage, which may be of conventional type and which will not be described in detail.

The working shaft 2 and the drive shaft 3 is placed in the specified internal space and coaxially mounted along a first longitudinal axis, with the drive shaft 3 is connected with a kinematic chain breaker with a fuse medium voltage through a conventional connection system to perform the operation of opening/closure of the specified switch. The working shaft 2 has a head 20 connected to the control handle for manual actuation of the specified operating shaft through the hole located on the front plate 11 of the drive mechanism 1.

The drive mechanism 1 of the invention further comprises the node 4 springs that includes the first 41 and second 42 of the coil spring, also located in the inner space between the base plate 10 and the front plate 11.

The first and second spiral springs 41 and 42, respectively, have first ends 411 and 421, which are connected to the working shaft 2, and a second end 412 connected to the drive shaft 3. The first and second spiral springs 41, 42 are stressed by rotation of the working shaft 2 and actuate the drive shaft 3 when unclamping, the first spiral spring 41 sets the rotation of the drive shaft 3 in across the lagoon to the false direction of rotation, given the second spiral spring 42.

One of the distinguishing characteristics of the drive mechanism 1 in accordance with the invention is that it is provided with clamping means 5 for clamping the drive shaft 3, thus clamping the tool contains the first 51 and second 52 attached to the tabs that are on the specified drive shaft 3.

Additional characteristics of the drive mechanism 1 in accordance with the invention lies in the fact that he also is provided with the first 61 and second 62 decompresses means for unclamping the drive shaft 3 and allow its rotation; in particular, as better explained here in further, the first decompresses the tool 61 enables the rotation of the drive shaft 3 in a direction that is opposite to the rotation provided decompresses the second means 62.

In fact, the operation of the circuit is performed by loading one of the first or second spiral springs 41 and 42, for example spiral springs 41; as soon as the spring is loaded, the drive shaft is clamped clamping means 5. Under these conditions, the closing spring is loaded as soon as the drive shaft 3 is clamped in position corresponding to the open position of the contacts of the associated switch with a fuse. OPE is the situation of the circuit is performed by exposure to one of these decompresses funds for example, decompresses the tool 61, whereby moving the drive shaft 3 and by allowing specified rotation of the drive shaft 3 in the first direction, for example clockwise direction relative to a front view of the drive mechanism 1.

Accordingly, the operation of the disconnection is performed by loading a different one of the said first or second spiral springs 41 and 42, for example, spiral springs 42; as soon as the spring is loaded, the drive shaft is clamped to the specified clamping means 5. In these circumstances, NC spring loaded, as soon as the drive shaft 3 is clamped in position corresponding to the closed position of the contacts of the associated switch with a fuse. The tripping operation is performed by pressing on one of these decompresses means, for example, decompresses the tool 62, whereby relaxes the drive shaft 3, and allows the rotation of the specified drive shaft 3 in the second direction that is opposite to the rotation provided by the specified second first decompresses means 61, for example, in this case counterclockwise relative to the front view of the drive mechanism 1.

Loading spiral springs 41 and 42 are traditionally performed one who temporarily; the operation of the circuit in this case is performed by exposure to, for example, decompresses the tool 61, while the operation of the opening, respectively, is performed by acting on decompresses the tool 62.

With reference to Fig. 3 and 4, the drive mechanism 1 in accordance with the invention, a work shaft 2, preferably, contains the first node 21, which, in turn, contains the disk 22 is essentially round shape, which is perpendicular relative to the specified first longitudinal axis, and further comprises a first plate element 23, which acts perpendicularly from the edge of the disc 22 in the direction of the head 20 of the working shaft 2. The first plate element 23 is connected with the second ends 412 and 422 of the first 41 and second 42 spiral springs.

In accordance with a preferred embodiment of the invention, the node 4 springs, preferably, contains the first lever 43, which is the main element 44 that is coaxially mounted on the first sub-node 21 of the working shaft 2 in accordance with the disk 22. The main element 44 of the first arm 43 is traditionally provided with locking means 441 for the first ends 411, 421 of the first and second spiral springs 41, 42. As an example, the specified fixing means can be formed by a groove in which are fixed above the first ends 411 and 421 of the decree is the R of the first and second spiral springs 41 and 42.

The remote end 45 of the first lever 43 protrudes from the edge of the disc 22 and is connected with a first plate element 23 of the first sub-node 21.

In accordance with a particularly preferred embodiment of the drive mechanism 1 of the invention, the first lever 43 includes an adjustment means 46, which are connected with the first plate element 23 for regulating pre-load the first 41 and second 42 spiral springs. Thus, the speed characteristics of the first and second springs 41 and 42 can be changed, or at least accurately adjusted according to needs, whereby providing a precise calibration of the speed characteristics of the drive mechanism and/or compensation due to, for example, wear of the springs or other mechanical components of the drive mechanism and/or circuit breaker. In particular, the regulating means 46, preferably, are arranged in such a way as to interact with the first plate element 23 of the working shaft 2. In fact, in accordance with this embodiment of the regulating means 46 allow rotation of the first lever 40 (which is fixed to the first end 411 and 421 of the first and second spiral springs 41 and 42) relative to the disk 22 of the working shaft 2, whereby has preliminarily changing the th load spiral spring 41, 42 and, consequently, their performance characteristics.

As an example, the regulating means 40 may include a hole, preferably a threaded hole located on the remote end section 45 of the first lever 43, and a screw means 48, is inserted in the specified hole and abutting against the first plate element 23 of the working shaft 2. Thus, by rotation of the screw 48, the second lever 42 can be rotated to a greater or lesser extent relative to the working shaft 2, thus altering the pre-load applied to the spiral springs 41 and 42.

Preferably, the drive shaft 3 includes a second sub-node 31 that contains a second L-shaped lever 32 having a flat base 33 is mounted for rotation along a specified first longitudinal axis, perpendicular to it; the second plate element 34 is perpendicularly from the flat base 33 in the direction of the head 20 of the working shaft 2.

In fact, the first 23 and the second plate 34 elements are, respectively, of the disk 22 and a flat base 33 along parallel directions. Also, the second plate element 34 is located at a distance from the said first longitudinal axis that is greater than the distance of the first plate element 23 from the first longitudinal axis; in other words, the length of PLoS is th base 33 more than the diameter of the disk 22. Preferably, as shown in Fig. 4, the length of the second plate element 34 is greater than the length of the first plate element 23.

As shown in the attached figures, preferably, the second plate element 34 is connected with the second ends 412 and 422 of the first and second spiral springs 41 and 42.

Preferably, the second sub-node 31 of the drive shaft 3 further comprises a main body 35 having a first side surface 36, which is attached to the flat base 33 of the second L-shaped lever 32. The main body 35 has a second lateral surface, for example, parallel and opposite to the first side surface 36 on which are located the first 51 and second 52 clamping tabs.

As shown in Fig. 2 and 5-8, in accordance with the preferred embodiment of the drive mechanism 1 of the invention the clamping means 5 contains the first 53 and second 54 clamping pawl mounted slidable on the third plate 13; the first 53 and second 54 sliding clamping pawls are movable between a clamping position and an unclamping position and are associated, respectively, with the first 51 and second 52 attached to the legs.

Also, in accordance with a particularly preferred embodiment of the drive mechanism 1 of the first invention is 61 and second 62 decompresses tools contain the first 610 and second 620 buttons unclamping, located on the front of the drive mechanism 1.

Detailed operations will be explained with reference to Fig. 5-8, showing the preferred embodiment of the invention.

As shown in these figures, the first 53 and second 54 attached to the sliding pawl mounted for sliding in a corresponding groove 530 and 540 in the third plate 13 located between the base 10 and the front 11 plates.

In Fig. 5 shows a working position, in which the first and second spiral springs 41 and 42 are loaded, and the drive shaft 3 is supported by clamping means 5 in a position corresponding to the position opening the contacts of the associated switch.

In accordance with this embodiment, in this position, the first sliding dog 53 is supported in the first position of the clamping means of the first clamping lever 55, in this first position clamping the first clamping sliding dog 53 abuts against the first clamping leg 51.

With reference to Fig. 6, when the first clamping lever 55 decompressed, the first clamping sliding dog 53 slides in the groove 530 and moves to the first position unclamping, in this first position unclamping the drive shaft 3 is freely rotated in the first direction, in this case counterclockwise relative to the view of the rear of the drive mechanism 1.

The drive shaft 3 rotates, transmitting power and energy on the contact system of the associated switch, until then, until it reaches the position of Fig. 7. In this position the drive shaft 3 is supported by clamping means 5 in a position corresponding to a position closing contacts in the associated switch, with one of the two spiral springs uncompressed, while the other spring is still loaded.

In the position of Fig. 7 second clamping sliding dog 54 is supported in the second position of the clamping means of the second clamping lever which is not shown, as it obstructed the third plate 13, but which is similar to the first clamping lever 55. As shown in Fig. 7, in the second position of the second clamping clamping sliding dog 54 abuts against the second clamping leg 52, mounted on the drive shaft 3.

As shown in Fig. 8, when the second clamping lever decompressed, the second clamping sliding dog 54 slides in the groove 540 and is moved into the second position unclamping, in this second position unclamping the drive shaft 3 is freely rotated in the second direction that is opposite to the specified first direction, in this case clockwise relative to the rear view of the drive mechanism 1.

Thus, PR is water shaft 3 is rotated, transmitting power and energy on the contact system of the associated switch, until then, until it reaches the position corresponding to its position in Fig. 7. In this position the drive shaft 3 is in the position corresponding to the position opening the contacts in the associated switch, both coil springs 41 and 42 unclenched.

Preferably, the clamping means 5 contains the first 57 and second blocking means for blocking, respectively, of the specified first 55 and second clamping levers. Second locking means not shown, so as obstructed third plate 13, but they are similar to the first blocking means 57.

First blocking means 57 may, for example, consist of a rotary finger having a first position (Fig. 5), in which he serves as an obstacle to the first clamping lever 55, blocking it, and a second position (Fig. 6), in which the first clamping lever 55 unclenched. A similar device is also possible for the second blocking means and the second clamping arm.

The first 57 and second blocking means is traditionally driven by these first 610 and second 620 buttons unclamping. The lever system includes levers 630, 640 and 650, which may be provided for connection button 620 unclamping with the associated second blokiruyu the tool. In addition, a return spring 550 and 540 can also be provided to facilitate return to its place of the first 55 and second clamping levers.

In a particularly preferred embodiment, the drive mechanism 1 in accordance with the invention also has a second working shaft 9. The second working shaft 9, preferably installed on a second longitudinal axis that is parallel to the specified first longitudinal axis, and preferably, may be used to perform a ground operation switch, applied to the shaft, which is independent from the first (main) working shaft 2, which is used for the operation of opening and closing.

As can be seen from the above description, the drive mechanism 1 for switch medium voltage, in particular for a circuit breaker with a fuse medium voltage, the present invention has several advantages relative to the switches, medium voltage, equipped with a conventional drive mechanisms.

In particular, the operation of the opening/closure can be easily performed by pressing on the button 610 and 620 unclamping.

Moreover, the presence of the regulating means 46 does not require overly precise dimensioning and pre-load spiral springs 41 and 42, as speed p the dinner can be calibrated and fine-tuned after Assembly. Moreover, the regulating means 46 provides the ability to configure the speed characteristics of spiral springs 41 and 42 in the case of temporary changes in the characteristics of the springs and/or related mechanical components.

It should be noted that the above-mentioned means (i.e., decompresses means and regulating means) can be implemented in a relatively simple manner, with a reduced number of constituent elements of relatively simple construction. Thus, the drive mechanism of the invention is also effective from the economical point of view.

In General, the design of the drive mechanism of the invention is very compact and can be adapted with only minor changes, to a number of different applications medium voltage.

Drive mechanism for a circuit breaker with a fuse medium voltage invention may also contain additional components and tools that were not described in detail since they may be of the traditional type.

Thus constructed drive mechanism for a circuit breaker with a fuse medium voltage may be subjected to numerous changes and implemented in several versions, included in the scope of the invention. Moreover, all parts of sannie here can be replaced with other technically equivalent elements. In fact, parts and dimensions of the device can be of any nature, in accordance with the need and the latest technology.

1. The drive mechanism (1) for circuit-breaker with a fuse medium voltage, comprising:
- base plate (10) and the front plate (11), forming an internal space containing a working shaft (2) and drive shaft (3), coaxially mounted along the first longitudinal axis, with the drive shaft (3) made with the possibility of connection with the kinematic chain breaker with a fuse medium voltage for the operation of the opening/closing switch, the working shaft (2) has a head (20) connected to the control handle for manual actuation of the working shaft (2);
node (4) springs, which contains the first (41) and second (42) of the spiral spring having a first end (411, 421), connected with the working shaft (2), with coil springs (41, 42) is made with the possibility of loading by turning the operating shaft (2) and drive shaft (3) when unclamping, the first spiral spring (41) is made with the possibility of rotation of the drive shaft (3) in the opposite direction of rotation given the second spiral is ruinas (42);
- clamping means (5) for clamping the drive shaft (3), containing the first (51) and second (52) attached to the tabs located on the drive shaft (3);
- first (61) and second (62) decompresses means for unclamping the drive shaft (3) and allow its rotation, while the first decompresses the means (61) is performed with rotation of the drive shaft (3) in the opposite direction relative to the second decompresses means (62), characterized in that the working shaft (2) contains the first subnode (21) containing the disk (22), perpendicularly mounted with respect to the first longitudinal axis, and optionally containing the first plate element (23), protruding perpendicularly from the edge of the disc (22) in the direction of the head (20) of the working shaft (2).

2. The drive mechanism (1) under item 1, characterized in that the hub (4) spring includes a first arm (43), with the main element (44), coaxially mounted on the first sub-node (21) of the working shaft (2), and the remote end (45) protruding from the edge of the disk (22), with the main element (44) is provided with fixing means (441) to the first ends (411, 421) of the first and second spiral springs (41, 42), while the remote end (45) connected to the first plate element (23) of the first sub-node (21).

3. The drive mechanism (1) p. 2, characterized in that the securing means (441) contains a groove in to the m fixed first ends (411, 421) the first and second spiral springs (41, 42), and additionally characterized in that the remote end (45) of the first arm (43) includes an adjustment means (46) connected to the first plate element (23) for regulating pre-load the first (41) and second (41) of spiral springs.

4. The drive mechanism (1) according to any one of paragraphs.1-3, characterized in that the drive shaft (3) contains the second subnode (31) containing the second L-shaped lever (32) having a flat base (33) mounted rotatably along the specified first longitudinal axis, perpendicular to it; and the second plate element (34), protruding perpendicularly from the flat base (33) in the direction of the head (20) of the working shaft (2), the second sub-node (31) further comprises a main body (35) having a first side surface (36), attached to the flat base (33) of the second L-shaped lever (32) and a second lateral surface, where the first (51) and second (52) attached to the Tarsus.

5. The drive mechanism (1) on p. 4, characterized in that the second plate element (34) is connected with the second end (412, 422) of the first and second spiral springs (41, 42).

6. The drive mechanism (1) according to any one of paragraphs.1-3 and 4, characterized in that the clamping means (5) comprises first (53) and second (54) attached to the sliding dog, to ascertain the data slidable on the third plate (13) and movable between a clamping position and an unclamping position, and associated with the first (51) and second (52) attached to the legs.

7. The drive mechanism (1) on p. 6, characterized in that the first (53) and second (54) attached to the sliding pawl mounted for sliding in a corresponding groove (530, 540) in the third plate (13), while the first sliding dog (53) is maintained in the first position of the clamping means of the first clamping lever (55), in this first position clamping the first clamping sliding dog (53) abuts against the first clamping leg (51), with the first clamping sliding dog (53) moves to the first position unclamping, when the first decompresses the lever (55) unclenched, in this first position unclamping the drive shaft (3) freely rotates in the first direction, the second clamping sliding dog (54) is supported in the second position of the clamping means of the second clamping arm, in this second position of the second clamping clamping sliding dog (54) rests against the second clamping leg (52), while the second clamping sliding dog (54) is moved into the second position unclamping, when the second decompresses the lever decompressed, in this second position unclamping the drive shaft (3) freely rotates in the second direction opposite to the specified first direction.

8. The drive mechanism (1) on p. 7 characterized in that that the clamping means (5) comprises first (57) and second blocking means for blocking, respectively, of the first (55) and second (56) clamping levers.

9. The drive mechanism (1) according to any one of paragraphs.1-3, 6, 7 and 8, characterized in that the first (61) and second (62) decompresses means include first (610) and second (620) unclamping button located on the front of the drive mechanism (1).

10. The drive mechanism (1) under item 9, characterized in that the first (610) and second (620) button unclamping, respectively, affect the first (57) and the second blocking means.

11. Switch with fuse medium voltage, characterized in that it comprises a drive mechanism (1) according to any one of paragraphs.1-10.



 

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Power accumulator // 2394297

FIELD: electrical engineering.

SUBSTANCE: invention relates to power accumulator for step switch operated at load with lengthwise-travel winding slides and lengthwise-travel jumping slides which, when unlocked, repeat the motion of winding slides and convert their translation into rotation of output shaft that actuates loaded step switch. Said jumping slides accommodate two guided rollers arranged in particular-geometry link. Note here that during first part of every stroke of jumping slides only one roller in guided in said link with geometrical tangenting (jointing), while, during second part of stroke, second roller moving free is guided in said link with geometric tangenting, while roller guided previously in said link moves free. Finally, during third part of stroke, roller moves again with geometrical tangenting in said link.

EFFECT: possibility to vary torque at output shaft and to produce high torque that allows reliable reach of final position and repeated interlocking of power accumulator.

5 cl, 4 dwg

FIELD: electrical engineering.

SUBSTANCE: proposed mechanical switching contact designed for double-pole change-over has holder made of insulating material that accommodates fixed contacts alternately coming in contact with contact holder; the latter, in its turn, mounts on its loose end turning lever carrying on its end respective conducting contact member. Mechanical switching contact is made in the form of modular structural unit that can be arbitrarily assembled. It has minimal quantity of structural components for double-pole switching and can be easily built in load switch without additional adjustment and matching.

EFFECT: simplified design, reduced space requirement.

4 cl, 4 dwg

Step switch // 2324994

FIELD: electrical engineering.

SUBSTANCE: step switch comprises accurate selector of transformer winding taps and if required preliminary selector designed for selection winding tap for switch without power consumption, as well as power switch of winding taps. At least one three-phased torque drive is provided in connection with transmission devices of various performances. Torque drive functions in different ways for certain structural assemblies.

EFFECT: design simplification due to reduction of part count, advanced compactness, high operation dynamics enabling stick-slip motion and improved performance.

16 cl, 20 dwg

FIELD: electricity.

SUBSTANCE: device contains two electric branches, some ends of which are connected between each other, and the others - to corresponding contacts of plug. Every branch includes indicator element, which is serially connected to limiting resistor. Indicator elements are arranged in the form of light diodes that are connected back-to-back. Earthing contact is taken out from the middle point of electric circuit that connects both branches.

EFFECT: simplification of device; higher reliability.

4 dwg

FIELD: electricity.

SUBSTANCE: invention relates to shunt resistance circuit breaker with control element and electrical circuit. The electrical circuit includes the main branch line (1) and resistible branch line (2) being connected in parallel with the main branch line (1). Each branch line contains contact (11, 21) and vacuum circuit breaker (12, 22). Resistible branch line (2) includes also a resistor (30). The main contact of rotary selector is always actuated before resistible contact (21). In accordance with the invention the control element is implemented so that it turns the main contact (11) in the same rotational direction during controlling operations. The invention also considers the related control method for shunt resistance circuit breaker and use of the circuit breaker.

EFFECT: provision of simple control function ensuring main contact actuation before resistible contact.

28 cl, 14 dwg

FIELD: electricity.

SUBSTANCE: tap switch (10, 20) designed for electric transformers includes drive mechanism and frame containing at least two elongated pins (11) to which there attached is a number of fixed male contacts located perpendicular in a row thus forming a whole entity. Besides switch consists of a system of moving contacts (14) operating based on friction, which slide along fixed contacts (12) owing to impact of worm (23). In end part of insulating tube (27) a nut thread is made or attached coaxially to worm (23) and outside it so that system of moving contacts (14) is fixed by means of shaped holder (28) in end part of insulating tube (27) opposite nut thread. Thus, nut thread is located in position different from the position of system of moving contacts (14) in relation to total length of switch (10, 20), thus providing use of moving contacts (14) without restrictions of sizes of tube (27) and/or worm (23).

EFFECT: simplifying the design, increasing functionality, reliability and strength, and improving manufacturability.

7 cl, 3 dwg

Tap switch // 2385514

FIELD: electric engineering.

SUBSTANCE: switch is closed on top with head that comprises head flange, in which driving shaft leading outside is installed. At this head flange there might be an available upper transmission step is arranged, or by means of compatible flange, a flywheel drive is installed without necessity in additional various units, in particular special head of switch.

EFFECT: provision of possibility to implement actuation of insulated switching shaft only with one head of switch, independently on type of drive.

2 cl, 4 dwg

Power accumulator // 2394297

FIELD: electrical engineering.

SUBSTANCE: invention relates to power accumulator for step switch operated at load with lengthwise-travel winding slides and lengthwise-travel jumping slides which, when unlocked, repeat the motion of winding slides and convert their translation into rotation of output shaft that actuates loaded step switch. Said jumping slides accommodate two guided rollers arranged in particular-geometry link. Note here that during first part of every stroke of jumping slides only one roller in guided in said link with geometrical tangenting (jointing), while, during second part of stroke, second roller moving free is guided in said link with geometric tangenting, while roller guided previously in said link moves free. Finally, during third part of stroke, roller moves again with geometrical tangenting in said link.

EFFECT: possibility to vary torque at output shaft and to produce high torque that allows reliable reach of final position and repeated interlocking of power accumulator.

5 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: invention relates to mechanical switching contact with insulating holder (1), where fixed contacts (4, 5, 6) are arranged. Besides lever (2) with rotary lever (22) is installed on insulating holder (1) with the possibility of rotation. Additionally another rotary body (3) of contact is installed on insulating substrate (1) with parallel contact fingers (9, 10), which accordingly embrace connected fixed contacts (4, 5, 6) on both sides.

EFFECT: invention provides for reliable switching at high currents, and switching with absence of vibrations and electric arc.

3 cl, 8 dwg

FIELD: electricity.

SUBSTANCE: device for transmission of rotational movement includes movement conversion unit that includes intermediate element (3) connected with rotation axis (3a) with the possibility of rotating round it, mechanical energy accumulating unit (5) in a form of spring device, unit of stretchable/compressible spring connected with solid clamp and movable clamp and means of transmitting mechanical energy accumulated in spring device to driven element (2) via drive shaft (2a). Note that intermediate element (3) contains cam drive roller interacting with energy accumulating unit (5). Movable clamp is equipped with rolling element that contacts with drive roller periphery. Movable clamp can be performed with the possibility of moving in radial direction parallel to plane of drive roller. Method of transmission of rotational movement to element includes transmission of mechanical energy accumulated in spring device to drive shaft. Application of proposed device for rotational movement transmission is performed with the possibility of winding switch contacts' control under load in transformer or stabiliser.

EFFECT: improvement of rotational movement transmission use.

15 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: high-voltage semiconducting switching device consists of selected by leakage current series connected unpackaged semiconducting elements that are centred and isolated by side surface with the help of fluoroplastic rings, housing, clamping system and current-carrying electrodes. The housing is made of isolating material with high mechanical and electrical strength. At both housing ends there are rigidly fixed metal flanges that are included in clamping system with threaded holes. At bolting of switching device cover to housing flanges with the help of clamping system elements located inside the cover there created is necessary compressive force of semiconducting devices and its transmission through the housing to semiconducting devices. Note that at the same time there performed is pressurisation of inner volume of switching unit housing by O-rings located between flanges and current-carrying electrodes.

EFFECT: increase of specific switching power of high-voltage semiconducting switching device current at simultaneous improvement of its switching characteristics.

5 cl, 1 dwg

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