Step switch

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

 

The invention relates to a manual switch for switching without breaking the circuit between the various branches of the windings of an adjustable transformer.

Speed switches, known for decades, are devices for voltage control and ensure high power quality. In accordance with their principle they can be subdivided into high-speed switches with shunt resistor and reactor switches.

The principle of operation of all high-speed switches with shunt resistors dates back to issued in 1929 the German patent No. 474613, which was first described the principle of intermittent switching without breaking the circuit between the various branches of the windings through short-term include shunt resistors. Based on this principle a step switches are known in numerous forms of execution. A typical representative is the switch type "M"described in the company materials "Stufenschalter Typ M - Inspektionsanweisung" the applicant of the present invention. This step switch under load contains the voter branch windings for pre-selection without the power consumption of the winding branches that you want to perform switching, which is prostranstvenno over him and placed in a separate oil-filled reservoir in the switch branch windings of the transformer under load to actually switch without breaking the circuit. Actuation of this manual switch under load is a motor drive with an electric motor, which, when it is started for the intended switching, on the one hand, continuously actuates accurate voter branches of taps of the transformer and, if necessary, the provisional voter branch windings of the transformer, and on the other hand, raises the energy accumulator switch branch windings of the transformer under load. This motor drive is located spatially on the side, outside of the transformer. By means of the rods, the angular gear, gear parts mechanism Maltese cross energy is supplied to the speed switch. If the battery power reaches its end position, i.e. it is fully raised, it fixed until now, the stopper is released and he makes an abrupt movement, whereby it actuates a switch branch windings of the transformer under load. In Fig. 1 is a schematic representation of a kinematic chain this well-known power step switch. In Fig. 2 shows a modified variant of such power speed switch, which instead of the usual preliminary voter branches of taps of the transformer soda is separated by the voter branch windings rough multiple choice; this form of execution is also known to the expert.

Another step switch described in the company materials "Lastwä'hler Typ V - Inspektionsanweisung" the applicant of the present invention. This is done as a power switch type "V" preliminary selection of the appropriate branch of the winding to which you want to perform switching, and structural elements to do this, then switch constructively combined. And in this case, provides motor drive with the above spatial location, which first raises the energy accumulator. After full recovery and subsequent release is driven by a rotary operating shaft, which quickly and without breaking the circuit switches from one fixed contact adjacent the other stationary contact, which is, respectively, electrically connected with a branch of the winding. Typical kinematic chain such well-known voter branch windings of the transformer is schematically shown in figure 3.

Step switch type reaction of switch is known, for example, from the documents DE-PS 4011019 and DE-PS 4126824 and proprietary materials "Load Tap Changer Type RMV-I" company Reinhausen Manufacturing Inc., (Alamo, PCs Tennessee, USA). They contain two pre-selected by the voter branch windings naked is utochnyu branches, between which in each switching phase, hosted switch, in this case the vacuum switchgear cell. Each vacuum cell distribution device may be bypassed through a bypass contact, which, for its part, again, at least one of the two load branches connects with a load diversion. Actuation of the vacuum cells switchgear is carried out, respectively, through the energy storage device which is lifted by the movement of the drive shaft. For each switching phase in the space between the shunt contact and drive energy placed a double Cam disk, drive shaft turns at each step of the switch 180 degrees. On the bilateral side Cam disk facing the shunt contact is a groove for regulating shunt contact, and on the other side is another groove for the regulation of energy storage, resulting in the action of the vacuum switchgear cell. Regulation of energy storage is carried out in such a way that it at every step switch once clamped and then closes and actuates the vacuum switchgear cell. Actuation of this supercategories is carried out by means of a motor drive with an electric motor, which is being powered by a prescribed switching, on the one hand, sequentially activates the contacts voter branch windings of the transformer, and on the other hand, through the described Cam disk also continuously drives the shunt contact and raises the described energy storage. If the energy storage device reaches its end position, i.e. it is fully raised, it fixed before the stopper is released and he makes an abrupt movement, he actuates the power switch. In Fig. 7 is a schematic representation of a kinematic chain this well-known speed switch.

Another step switch type reactor switch is known from the document DE-PS 19743864, which also shows in detail the functional differences between the reactor switches and high-speed switches with shunt resistors. In this known step-by-step switch in the housing for each phase is provided by fixed contacts voter branch windings of the transformer, which can be fed two movable contacts voter branch windings, in addition, for each phase is provided by the contacts of the preliminary voter branch windings of the transformer. For each of the phases to the same again provided by shunting the contacts and, accordingly, the vacuum cell distribution device, which can operate energy storage. In a separate side of the body, there is only one drive mechanism for actuating all of the movable contacts and all vacuum distribution device cells in the corresponding sequence, and this is the only actuator acts on the individual structural elements by passing through the body, insulated shaft. Typical kinematic chain this well-known speed switch presents on Fig.

In the step switches driven by an electric motor drive. Such an actuator is described, for example, in WO 98/38661. In this known motor drive combined all mechanical and electrical components that are required to drive the speed switch. Important mechanical structural nodes are power transmission mechanism and regulating gear. The power transmission mechanism drives directly step switch; for this he has accordingly designed the motor. Regulating the transmission mechanism includes a Cam disk that the gear speed is th switch is rotated a complete revolution. The Cam disk again contains many switching Cams for mechanical actuation of the set of Cam switches and, accordingly, switchable Cams contacts. Regulating gear contains, in addition, the means of indicating the position of the switch or step switch. To electric constructive nodes in the motor drive includes a variety of circuit. So, there is a circuit of the engine, whereby the terminals of the electric drive motor through contactors for motor control, brake contactors and other circuit elements are connected with a supply current. In addition, there is the circuit of the control current and the various circuits of the signal current and the circuit operation for protective machine motor. Control motor itself is on the principle of the stepping switch, i.e. the regulatory process at step switch introduces a single regulatory impulse and then be forced to stop; drive shaft of the motor drive, which is connected to the drive shaft speed switch, perform this pre-cisely the set number of revolutions. In addition, the known motor drive along with protective device also includes a protection device from slipping, which prevents the button with the failure described stepping motor control drive has been slipping to the end position.

Describes the known motor drive together with the mounted in the bearing mechanism of the Maltese cross in step switch type high-speed switch with shunt resistors must perform a number of functions:

- output torque with subsequent conversion to move voter branch windings,

transmission and transformation/conversion with decreasing torque,

- the rise of energy storage,

- convert continuous move step move,

- fixation of the switching element after a perfect step switch,

- indication of switch position,

- the mechanical function of the way into the end position.

In General, the conventional motor drive and transmission mechanisms in the bearings are complex in design, expensive to manufacture due to the required high precision and in conjunction with energy storage, they are usually the most expensive part of the manual switch.

In the case of a manual switch type reactor switch describes the known motor drive together with the mounted in bearings gear mechanism, in particular the mechanism of the Maltese cross and lever change-over gear mechanism is ω must perform the following functions in the multi-stage switch:

- output torque with subsequent conversion to the movement for accurate voter branch windings, as well as separately for the preliminary voter branch windings,

- actuation of shunt contacts

- the rise of energy storage for subsequent actuation of the vacuum switchgear cell,

- indication of switch position,

- the mechanical function of the way into the end position.

In General, and in this case as a normal motor and transmission mechanisms in the bearings are complex in design, expensive to manufacture due to the required high precision and in conjunction with energy storage, they are usually the most expensive part of the manual switch.

The objective of the invention is to radically alter the fundamental design manual switches, which has existed for many years and has a strong position in the technology.

This problem is solved changer with signs of paragraphs 1 or 6 or 11; in dependent clauses listed preferred options implementation and modification of the invention.

The basis of the invention is the idea to introduce at least one itself known torque e is extradigital as an integral part of the drive branch circuit or manual switch.

These torque motors are known, for example, from branded materials "Bürstenlose Torque-Motoren" company ETEL. This known torque motor operates on the same physical basis as the drive with a linear motor, but only located here linear stator is minimized in a circle. The torque motor is a servo that is optimized for high torque; modern complete with electrical point of view, represent a 3-phase brushless synchronous motors with excitation by permanent magnets. They currently are used in instrumentation. Still no attempt was made to implement them in a step-by-step switches or, in principle, be made useful for the drive speed of the switches.

However, in the past an attempt was made, as described in document DD 58131 from 1967 to move away from the traditional principle of the actuator step switch, as described above. It was about the decision, in which the voter branch windings of the transformer is formed from such a large number hydraulically driven individual work modules as provided by steps, so that you can make switching between any of the separate branches of the winding, not only between adjacent branches. This decision from the COI is whether the hydraulic means no, however, implemented because of the high risk in the operation, for example the danger of aging water-pipes and seals.

For switching devices have been proposed various other drivers. For example, the solution described in the document EP 996135 relates to magnetic actuator traveling magnetic field for switching device. In documents WO 99/60591 and WO 00/05735 described actuators by type stepper motor for switching devices. And these solutions are not applicable for step switches without additional effort, since they do not provide the possibility of stepwise movement and however problematic for the implementation of dynamic processes and also at low temperatures.

Finally, in document WO 01/06528 proposed controlled actuator for the switching device, which is also not suitable for use in multi-stage switch.

However, all these attempts further improvements in drive mechanisms should not be relevant to the application of the invention, at least one of the torque engine speed switch.

In accordance with the invention, such a torque motor may be provided as an integral part of the manual switch in different locations. It can be placed outside of transformat REGO compartment, namely higher on the transformer or on the side of the transformer. In addition, it can be placed inside the transformer compartment and replace the drive power switch, the actuator is accurate voter branch windings or drive the preliminary voter branch windings or more of these structural assemblies.

Corresponding to the invention use one or more of the torque motors, which are formed structured differently blocks positioning, has many advantages. First of all, no need of the joint or separate transmission mechanisms, thereby significantly reducing the number of parts. In addition, there is the compact design. Due to the slight elasticity ensures high rigidity, and due to the small mass and low moment of inertia can be provided with high dynamics with the ability spasmodic movements, eliminating the need for conventional energy storage. Finally, through the appropriate management can be implemented in any step of switching regardless of the specific current moment of resistance, which largely can be excluded, for example, the effects of temperature.

The invention is explained in more detail below with references is and schematic representation of the drawings.

Figure 1-3 - kinematic chain known speed switch type high-speed switch with shunt resistors.

Figa, 4b and 5a, 5b is a schematic representation of possible applications in accordance with the invention, at least one torque motor in the power stage switch of this type.

Figa, 6b is a schematic representation of possible applications in accordance with the invention, at least one torque motor voter branch windings of the transformer, adjustable under load, this type.

7 and 8 is explained above kinematic chain known speed switch type reactor switch in schematic representation.

Figa, 9b, 10a, 10b and 11a, 11b is a schematic representation of possible applications in accordance with the invention, at least one torque motor in the first-step switch of this type.

Figa, 12b - schematic representation of possible applications in accordance with the invention, at least one torque motor in the second-step switch of this type.

In the following schematic views corresponding to the invention the structural components which, respectively, contain torque motor, designated, respectively, as the unit point the simulation and is shown shaded. Italics in the corresponding block specific function, which performs the corresponding torque motor, i.e. corresponding to the positioning block.

On figa for designated installation manual switch out of the transformer shown that in this case, in accordance with the invention, the torque motor replaces the previously existing motor drive and the subsequent gear and directly affects the energy storage of the power switch, the Maltese cross mechanism accurate voter branch windings of the transformer and, if necessary, preliminary voter branch windings of the transformer. Below schematically shows another form of execution of the invention in which the torque motor is additionally also replaces the previously available according to the prior art energy storage device with a corresponding gear mechanism, so that this new unit positioning the torque motor directly acts on the mechanism of the Maltese cross of accurate voter branch windings of the transformer and, if necessary, preliminary voter branch windings of the transformer and directly actuates the power switch branch windings of the transformer. This second form of execution may also contain the substance of the inside of the transformer, as shown in fig.4b.

On figa and 5b schematically presents other forms of execution of the invention. On figa for designated installation manual switch out of the transformer shown that in accordance with the invention, the first torque motor directly drives the power switch branch windings of the transformer, it makes it unnecessary pre-existing energy storage (left block positioning); other torque motor (right block positioning) directly actuates the mechanism of the Maltese cross of accurate voter branch windings of the transformer and, if necessary, preliminary voter branch windings of the transformer. In contrast to the forms of execution of the invention according figa and 4b, in which there is only a single torque motor, here shown thus several such blocks positioning. Below is another modified form of the invention, in which there are three such torque of the engine: the first corresponding to the invention, the positioning block (left) leads directly into the action, excluding pre-existing energy storage, power switch branch windings of the transformer, the second positioning block (medium) directly the NGO operates accurate voter branch windings of the transformer and the third positioning block (right) directly activates the provisional voter branch windings of the transformer, if there is one. On fig.5b these forms of execution of the invention shown for designated installation manual switch inside the transformer.

In the framework of the invention it is also possible the power switch branch windings of the transformer spatial place separately from accurate voter branch windings of the transformer and, if necessary, from the preliminary voter branch windings of the transformer, that is both constructive node speed switch be placed separately at different places. Alternatively, accurate voter branch windings of the transformer and, if necessary, the provisional voter branch windings of the transformer be powered separately by a known stepper motor. Because voters branch windings of the transformer are driven slowly and continuously, such a disadvantage of the known stepping motors, as their poor dynamic properties here does not create interference.

On figa, 6b shows the same schematic representation of the possible forms of execution of the invention in the case of a manual switch type voter branch windings of the transformer, adjustable under load. Fig. 6A again refers to the placement of the manual switch out of the transformer, and fig.6b to its location within the and transformer. Top view, respectively, represents a form of execution in which the torque motor directly drives the drive energy, which is again a known manner abruptly turns the switching column and optionally, if necessary, activates the provisional voter branch windings of the transformer. The average view shows a form of execution of the invention in which the torque motor also functions as a pre-existing store of energy and directly abruptly turns switching the column. The bottom view shows the form of the two torque motors, according to which the first of these new units positioning directly abruptly turns switching the column, and the second positioning block actuates a preliminary voter branch windings of the transformer.

On figa to accommodate manual switch out the transformer in the upper half of this representation shows that in this case, in accordance with the invention, the torque motor replaces the previously existing motor drive and directly acts on the drive shaft of the change-over gear mechanism. Drive shaft with your hand, etc which leads to action in each phase of the newly preliminary voter branch windings of the transformer, accurate voter branch windings of the transformer, shunt contact, and also through the energy storage device (not shown) vacuum switchgear cell. Below is a schematic representation of another form of execution in which the torque motor in each phase forms a new unit positioning, which also includes the previously existing switching gear. On fig.9b shows the relevant configuration for step switch, located inside the transformer.

On figa and 10b is a schematic representation of another form of execution of the invention. On figa in the upper part it is shown that in each phase the first torque motor through a transmission mechanism simultaneously actuates the provisional voter branch windings of the transformer and accurate voter branch windings of the transformer, and accordingly, the second torque motor drives the shunt contact and the newly raised through the energy storage vacuum switchgear cell. The following shows another form of execution, according to which in each phase there are three torque motor, which together with the respective gear mechanisms form an independent unit positioning and neposredstvennostiu respectively on the preliminary voter branch windings of the transformer or accurate voter branch windings of the transformer, or how to bypass the switch and the energy storage vacuum switchgear cell. On fig.10b shown these forms run again for hosting manual switch inside the transformer.

Figa and 11b show an additional modified form of carrying out the invention. In these forms of execution used until now, the principle of correlation of individual structural elements, respectively switchable phase is not applied. The first torque motor in this case actuates the provisional voter branches of the transformer windings of all three phases, the second torque motor - accurate voter branches of the transformer windings of all three phases and the third torque motor as a shunt contacts, and drive energy and thereby the vacuum cell switchgear all three phases.

On figa, 12b in the same schematic representation shows a possible form of execution of the invention in another known speed switch corresponding to the above generic concept, known from the prior art kinematic chain shown in Fig described above. The top view shows a form of execution in which a single torque motor, respectively, through premiato is activated gearing drives the preliminary voter branch windings of the transformer, accurate voter branch windings of the transformer and at the same time the shunt contact and the vacuum switchgear cell, again through the energy storage. Below average views showing, respectively, the form of execution which in each phase there are two such torque motor. One of them operates as a provisional voter branch windings of the transformer and accurate voter branch windings of the transformer, and the other as a shunt contact and the vacuum switchgear cell. And finally, below, illustrates the case in which in each phase there are three torque of the engine, one for the preliminary voter branch windings of the transformer, the other for accurate voter branch windings of the transformer and a shunt contact and the drive energy of the vacuum switchgear cell. And here you can refuse configuration corresponding to each phase, and all shows the configurations presented on figa and 12b, to carry out the actuation of the individual described structural elements at the same time for all three phases of the respective block positioning. Figa refers again to the configuration manual switch for accommodation is outside the transformer, and fig.12b for its placement in the transformer.

1. Step switch for switching without breaking the circuit between the various branches of the windings of the transformer with a stepped control voltage according to the principle of high speed switch with shunt resistors, consisting of accurate voter branch windings of the transformer and, if necessary, preliminary voter branch windings of the transformer for choice, without power taps of the transformer winding, which must be then made the switch, also consisting of a power switch branch windings of the transformer for subsequent high-speed switching with previous pre-selected branch winding of the transformer during short-term inclusion of the at least one shunt resistor, and accurate voter branch windings of the transformer and, if necessary, the provisional voter branch windings of the transformer and a power switch branch windings of the transformer at each switch are driven by an actuator, wherein the drive is provided, at least one torque motor, designed as a 3-phase brushless synchronous motor excited with the eat the permanent magnets.

2. Step switch according to claim 1, characterized in that at least one torque motor actuates known as the energy storage of the power switch branch windings of the transformer and accurate voter branch windings of the transformer and, if necessary, the provisional voter branch windings of the transformer.

3. Step switch according to claim 1, characterized in that at least one torque motor actuates directly the power switch branch windings of the transformer and accurate voter branch windings of the transformer and, if necessary, the provisional voter branch windings of the transformer.

4. Step switch according to claim 1, characterized in that the at least one first torque motor, respectively, directly actuates the known energy storage power switch branch windings of the transformer, and at least one second torque motor actuates, respectively, accurate voter branch windings of the transformer and, if necessary, the provisional voter branch windings of the transformer.

5. Step switch according to claim 1, characterized in that the at least one first torque output is l, accordingly, directly actuates a switch branch windings of the transformer under load, at least one second torque motor, respectively, directly actuates accurate voter branch windings of the transformer and, optionally, at least one third torque motor, respectively, actuates the provisional voter branch windings of the transformer.

6. Step switch for switching without breaking the circuit between the various branches of the windings of the transformer with a stepped control voltage according to the principle of high speed switch with shunt resistors consisting of a voter branch windings of the transformer, adjustable under load, for simultaneous selection of taps of the transformer winding, which should be carried out switching and fast switching with previous pre-selected branch winding of the transformer during short-term inclusion of the at least one shunt resistor, and the switch is abruptly driven switching element, in particular, column switching, characterized in that the drive provided by least one point of the first motor, designed as a 3-phase brushless synchronous motor with excitation by permanent magnets.

7. Step switch according to claim 6, characterized in that at least one torque motor directly drives the known energy storage device, which, for its part, in a known manner abruptly moves the switching element, and, if necessary, activates the provisional voter branch windings of the transformer.

8. Step switch according to claim 6, characterized in that at least one torque motor directly abruptly moves the switching element, and, if necessary, activates the provisional voter branch windings of the transformer.

9. Step switch according to claim 6, characterized in that the at least one first torque motor directly abruptly moves the switching element, and, optionally, at least one second torque motor directly drives the preliminary voter branch windings of the transformer.

10. Step switch according to any one of claims 1 to 5, characterized in that the power switch branch windings of the transformer with one hand and accurate voter branch windings tra is of formator and if necessary, the provisional voter branch windings of the transformer with the other hand placed spatially separated and/or accurate voter branch windings of the transformer and, if necessary, the provisional voter branch windings of the transformer can operate separately through at least one stepper motor.

11. Step switch for switching without breaking the circuit between the various branches of the windings of the transformer with a stepped control voltage according to the principle of the reactor switch, consisting of accurate voter branch windings of the transformer with two load branches, between which in each switching phase posted by vacuum switchgear cell, consisting of preliminary voter branch windings of the transformer, consisting of a shunt contact, respectively, bypasses the vacuum switchgear cell and through which at least one of the two load branches is connected with a load diversion, and storage of energy, which activates the appropriate vacuum switchgear cell, moreover, there is only one drive, which through appropriate puredata the mechanisms and with the drive shaft actuates all of these structural elements, characterized in that the drive is provided, at least one torque motor, designed as a 3-phase brushless synchronous motor with excitation by permanent magnets.

12. Step switch according to claim 11, characterized in that at least one torque motor operates the drive shafts.

13. Step switch according to claim 11, characterized in that three separate torque motor placed in such a way that each of them operates structural elements belonging to the same phase, namely, the provisional voter branch windings of the transformer, accurate voter branch windings of the transformer, shunt contact and the drive energy of the corresponding vacuum switchgear cell.

14. Step switch according to claim 11, characterized in that for each phase there are two separate torque motor, one of which actuates the provisional voter branch windings of the transformer and accurate voter branch windings of the transformer, and the other drives the shunt contact and the drive energy of the corresponding vacuum switchgear cell.

15. Step switch according to claim 11, characterized in that for each phase is provided by t and separate torque motor, of which, respectively, one actuates the provisional voter branch windings of the transformer, the other is accurate voter branch windings of the transformer and another as a shunt contact and the drive energy of the vacuum switchgear cell.

16. Step switch according to claim 11, characterized in that there are three separate torque motor, one of which actuates the preliminary voters branches of the transformer windings of all three phases, and the other actuates the exact voters branches of the transformer windings of all three phases and the third operates as a shunt contacts, and the energy storage of the respective vacuum distribution device cells of all three phases.



 

Same patents:

FIELD: mechanical design of electric switching apparatuses and method for their assembling.

SUBSTANCE: proposed electric switching apparatus has arc-control casing designed to accommodate at least one pole arc-control unit that incorporates two laminated arc-control units disposed either side of movable contact bridge along horizontal axis. Arc-control casing has first member incorporating base formed by first horizontal side of switching apparatus to organize chamber that has space for first laminated arc-control unit and second member connected to first one; second member has base formed by second horizontal side of switching apparatus opposing first one to form chamber that has space for accommodating second laminated arc-control unit.

EFFECT: enhanced mechanical strength and tightness of switching apparatus at superhigh gas pressures, facilitated assembly and reduced time required for this procedure.

15 cl, 7 dwg

FIELD: power supply and control system networks for switching electric circuits.

SUBSTANCE: proposed contactor has main wound electromechanical relay with first and second make contacts, DC switched voltage being applied across first contact; controlled semiconductor switch whose power input is connected to first contact of main electromechanical relay; there is also auxiliary wound electromechanical relay that has first and second make contacts, current sensor, and control device; auxiliary-relay first contact is connected to power output of controlled semiconductor switch and second contact, to current output of current sensor whose current input is connected to second contact of main relay; data output of current sensor is connected to second input of control device whose first input supplied with control voltage is connected to main relay coil; first output of control device is connected to control input of semiconductor switch and second output, to auxiliary electromagnetic relay coil, load being connected to second contact of auxiliary relay.

EFFECT: enhanced operating reliability and reduced size due to dispensing with arc-control chambers.

1 cl 1 dwg

FIELD: refrigeration equipment.

SUBSTANCE: refrigerator comprises switch with contactless control and case enclosing the switch. The case has fastening means for removable case retention inside orifice. Plug connectors to bring the switch into circuit are provided on one case side. Refrigerator wall has plug socket with mating members to receive plug connectors of the switch. Switch is carried by plate provided with plug connectors formed on one plate end. The switch is of magnetically operated sealed type, namely reed switch.

EFFECT: decreased moisture sensitivity, possibility of sensor installation on refrigerator body and replacement.

12 cl, 7 dwg

Interlocking device // 2310251

FIELD: electrical engineering; interlocking mechanisms; controlling electric circuits in stand-by power input systems.

SUBSTANCE: proposed mechanical circuit-breaker interlocking device has plate, bracket installed in center of plate with intermediate-size rocker-arm and two small-size ones hinged thereto, small-size rocker-arms being axle-mounted below intermediate-size one symmetrically to its fixation axis. Each rocker-arm has slits on its opposite ends with downward directed stops disposed in their bases and, consequently, in those of rocker-arms. Stops provided on opposite ends of rocker-arms are disposed at different sides of its axial line. Stops made on opposite ends of rocker-arm are likewise disposed at different sides of its axial line. Plate and bracket are provided with holes to pass stops though them and to provide their interaction with pushers and through the latter, with circuit-breaker power contacts, respectively. Intermediate-size rocker-arm stops are longer than small rocker-arms by displacement distance of respective rocker-arm fixation axes.

EFFECT: enlarged functional capabilities and application range of mechanical interlocking device, reduced size and simplified design of interlocking system.

1 cl, 6 dwg

FIELD: electrical engineering.

SUBSTANCE: proposed electric switching apparatus is characterized in that arc-control gas flow is set up in the course of its OFF-operation and has cooling device with solid wall and through holes, at least one of them being closed by means of sleeve fittings connected to cooling device through detachable joint.

EFFECT: facilitated coordination of device cooling capacity.

8 cl, 1 dwg

Arc-control device // 2306629

FIELD: electrical engineering.

SUBSTANCE: proposed arc-control device that can be used in high-speed circuit breakers for overload and short-circuit protection of electrical equipment, for instance that of DC consists, is made in the form of arc chute that has external walls with arc-control horns between them and deion grids tilted through certain angle to one another and assembled of steel plates with air gaps between them. Flame-retardant grids are installed along deion grids at arc chute outlet. Holes are provided in external walls of arc chute in vicinity of deion grids. Provision is made for regulating aerodynamic factors occurring in the course of arc quenching due to elimination of ionized gas flow toward circuit-breaker contact group.

EFFECT: reduced size of arc chute, enhanced switching capacity of high-speed circuit breaker.

1 cl, 2 dwg

Wall-mounted switch // 2305341

FIELD: electrical engineering; wall-mounted internally illuminated switches for handling electric circuits.

SUBSTANCE: proposed internally illuminated wall-mounted switch that can be used as switch-and-light unit has shroud accommodating switching device, control device for the latter in the form of key, light-emitting components in the form of direct light-emitting diodes, and shielding cover with hole in its bottom part for diode emission output disposed so that light beam is directed to bottom end; this hole is covered with insert in the form of movable thin-sheet iris; light-emitting diodes are disposed above upper edge of hole.

EFFECT: enlarged functional and ergonomic capabilities.

3 cl, 3 dwg

FIELD: electrical engineering.

SUBSTANCE: proposed device that can be used to control dual-speed electric motors as well as to connect power loads in series with power supply or to function as phase-sequence change-over apparatus has two vacuum chambers. Second-chamber movable contact is mechanically joined with lever so that when first-chamber contacts are open, those of second vacuum chamber are closed and vice versa, when first-chamber contacts are closed, second-chamber ones are open. Device incorporated provision for reliable interlocking of its contacts to prevent throwing of two loads onto full voltage at a time.

EFFECT: enhanced reliability and minimized time interval between on-operation of one load and off-operations of other load.

5 cl, 3 dwg

FIELD: electrical engineering; off-line power system supply mains.

SUBSTANCE: proposed electric circuit arcless switching device has contacts and normally open controlled semiconductor switch whose control electrode is connected to resistor first lead and through directly connected diode, to first lead of contacts forming first output terminal. Second lead of contacts is connected to first power lead of semiconductor switch forming control input of switch together with control electrode; capacitor is connected to this switch. Second power lead of switch forms second output terminal and second resistor lead is connected to first output terminal; inverse diode is connected in series with resistor.

EFFECT: enhanced reliability, simplified design.

2 cl, 3 dwg

Wall-mounted switch // 2298248

FIELD: electrical engineering; circuit-opening devices, for instance domestic and industrial wall-mounted switches.

SUBSTANCE: proposed wall-mounted switch has case with switching device and terminals for connecting device contacts to supply mains and to load, device control component in the form of keys, and safety cover. Switch is provided with internal lighting unit to facilitate its finding in dark locations that has series-interconnected light-emitting diodes connected through protective and limiting module to switch terminals. Switch keys and/or cover are made of translucent material. Light-emitting diodes are disposed on case for turning and locking in position by means of hold-down clamps; they are installed in the latter for longitudinal displacement. Provision is made for controlling surface lighting and brightness, for its good sideways visibility, and for dispensing with making holes in cover and/or in switch keys.

EFFECT: facilitated manufacture and assembly, enhanced ergonomic and operating characteristics of switch.

4 cl, 3 dwg

FIELD: electrical engineering.

SUBSTANCE: proposed switch has movable contact, fixed contact, and arc-control chamber with external electrode and central electrode. External electrode is electrically connected to fixed contact. Chamber accommodates coil connected in series with external electrode and supplied with electric-arc discharge current to build up magnetic field and to move electric-arc discharge relative to motionless insulating gas. Central electrode is electrically connected to movable contact and passes through external electrode for shifting electric-arc discharge set up between these two electrodes. Electric field built up between these two electrodes is homogeneous to a great extent.

EFFECT: enhanced dielectric strength of switch; reduced probability of repeated initiation of electric-arc discharge.

7 cl, 3 dwg

FIELD: switching engineering; arcless change-over of two loads.

SUBSTANCE: proposed device has lead for connection to power supply, diode bridge rectifier, change-over contact group, fixed making and breaking contacts connected to leads for connection to two loads and to inputs of diode bridge, and first controlled semiconductor switch whose first power lead and control electrode are connected to outputs of diode bridge and second power lead forming control input of switch together with control electrode, to movable contact of change-over contact group; second power lead of first switch is connected to movable contact of change-over contact group through control input of newly introduced second controlled semiconductor switch formed by control electrode and first power, second power lead being connected to power supply connecting lead.

EFFECT: simplified design, enhanced economic efficiency, speed, and reliability of device.

2 cl, 2 dwg

FIELD: electrical engineering; control devices including those preventing movement of control device components with external drive.

SUBSTANCE: proposed device has case 1 with cover 7 accommodating control rod 16 installed in guides between cover 7 and case 1; ball 14 mounted in hole of case 1; and control drive. Novelty is that device is provided in addition with diaphragm 13 tightly sealed under ball 14 in case hole; retainer 10 fitted between diaphragm 13 and internal boss 8 on cover 7 coaxially with armature 17; E-shaped spring 15 secured on control rod 16 to press control rod to case 1 and ball 14, to diaphragm 13 and to rotary retainer 10. Control drive is made in the form of rotary electromagnet incorporating bistable polarized electromagnetic system; spring stops 20 are installed at ends of armature 17 with carriers 19 of control drive.

EFFECT: simplified design and enhanced reliability of device incorporating electromagnetic drive.

3 cl, 2 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

FIELD: condition inspection of high-voltage equipment.

SUBSTANCE: partial discharge sensor is made in the form of inductance coil disposed inside electrostatic screen; its potential lead is connected in series with analog-to-digital and optical converters provided with common power unit; optical fiber cable is connected to output of optical converter; partial discharge sensor, both converters, and common power unit are connected to ground through same ground connection; common power unit may be fuel cell battery, storage cell, or converter that functions to convert ac voltage induced in partial discharge sensor into dc voltage.

EFFECT: enhanced noise immunity in partial discharge measurements.

3 cl, 2 dwg

FIELD: electrical engineering; power-station and substation switchgear installations.

SUBSTANCE: proposed device has switching apparatus position detectors, interlocks on operating mechanisms, and electromagnetic switch; newly introduced in device are receiver and logic circuit. Position detectors are contactless units incorporating nonmagnetic plastic pointer and wireless reed-relay transmitters. Each output of receiver unambiguously relates to continuous coded radio signal of each wireless reed-relay transmitter. Inputs of logic circuit are connected to receiver outputs and outputs, to interlocks. One of receiver outputs unambiguously relates to continuous coded radio signal of wireless reed-relay transmitter of electromagnetic switch and is used for remote connection of logic circuit to power supply.

EFFECT: enhanced operating reliability and reduced maintenance and early-failure charges.

2 cl, 4 dwg

Fuse switch // 2275706

FIELD: electrical engineering; switchgear and control gear.

SUBSTANCE: proposed fuse switch has U-shaped case, insulating strip with at least one pair of contacts, cross-arm that mounts fuses, and disconnecting mechanism incorporating shaft and two levers fixed on opposite ends of shaft; levers have curvilinear section in which arc curvature ranges between π/3 and π, at least one center of curvature being offset relative to shaft axis toward end of curvilinear section. At least one boss contacting curvilinear section of lever is provided on each butt-end of cross-arm.

EFFECT: simplified design, enhanced operating reliability.

6 cl, 6 dwg

FIELD: electrical engineering.

SUBSTANCE: proposed high-voltage load switch operates when immersed in insulating liquid and can change over one or more supply phase leads using one or more phase changers. Each phase changer has first and second movable contacts and fixed contact. First fixed contact is connected to phase lead of high-voltage power supply. Moving area of first movable contact between first and second positions includes arcing area. Switch incorporates mechanism for insulating liquid circulation through arcing area. Nonconducting shield used for arc suppression between different phases isolates different phase changers when more than one phase changer is used. Nonconducting shield can also isolate one phase from ground thereby preventing phase-to-ground arcing.

EFFECT: improved performance characteristics.

26 cl, 10 dwg

FIELD: engineering of networks of autonomous electricity provision systems.

SUBSTANCE: device for arc-less commutation of electric circuit, contains normally open controllable semiconductor key, controlling electrode of which is connected to first outputs of resistor and direct-enabled diode, capacitor and contacts, first output of which is connected to first output clamp, and second one - to second output of resistor and to first force output of semiconductor key, forming controlling input of key together with controlling electrode, second force output of which forms second output clamp, capacitor by one end is connected to first output of contacts, and by another one - to second output of direct-enabled diode and to first output of additionally inserted resistor, second output of which is connected to second output of contacts.

EFFECT: provision in disabled state of galvanic decoupling of load from power source.

2 dwg

FIELD: electrical engineering; push-button switches.

SUBSTANCE: switching chamber mounted in explosion-proof push-button element case is formed at point of intersection of blind opposing cylindrical holes; open parts of these cylindrical holes perform auxiliary function and are closed upon assembly by means of end caps or lids so that normally arcing parts (fixed contacts and contact bridge) are enclosed in explosion-tight shell made by using cylindrical explosion-tight joints.

EFFECT: enhanced degree of protection against mechanical damage, ability of taking explosion pressure and preventing its escape to environment.

1 cl, 2 dwg

Up!