BG110806A - VARIABLE VACUUM VENTILATION CURVE ADJUSTABLE CAMERA FOR SIDE TRANSFORMER INSTALLATION - Google Patents

Abstract

The step regulator performs under tension control of power transformers. It is mounted sideways on the transformer bowl. Its power switch operates with vacuum arc cameras and resistors. On the rear face of a vertical insulating plate (22) there is a selector (20) housed in an oil insulated cylinder (19) with an insulating bottom (23). Isolated (8, 18) and odd (7, 17) fixed contact elements are connected to the insulating cylinder, connected by means of removable contact nodes (39, 43) to the connecting rings (25, 26). A pre-selector (45) is disposed adjacent the selector (20) and has an insulating bottom (47) insulating cylinder (46). A metal shield (30) with Maltese wheels and two-wire translation (29) is mounted on the front face of the insulating plate (22). A power switch (32) with two or three VDCs (69) and a resistor (99) is attached to the metal shield (30). The power switch (32) and the Maltese gear (27, 28, 29) are housed in a protective housing (66) with a cover (67) and a connecting flange (68) for gripping the transformer bowl.

Description

TECHNICAL FIELD

The invention relates to a step regulator designed to regulate under load the voltage of power transformers. It is mounted sideways on the transformer boiler.

Switches using vacuum arc chambers (VDC) and resistors.

BACKGROUND OF THE INVENTION

A stepped voltage regulator (1) is known, having a vertical insulating plate on which a selector with a selector is located. A power switch with mounting is mounted on the front insulation panel in front of the Maltese gearbox.

VDK and two parallel contact units. Power switch-

the wire works in conjunction with a reactor placed behind the insulating plate in the space of the load-adjustable power transformer. The foot controller is housed in a protective housing with a lid and mounted sideways on the transformer wall. With a three-phase step controller, three phases are mounted side by side on an insulating board.

The disadvantage of this step controller is that it uses reactors that are heavy, expensive and time consuming. Another disadvantage is that VDC switches inductive loads, which significantly complicates its operation. The disadvantage is that the parallel contact units produce partial electrical erosion, which pollutes the oil environment.

A step regulator (2) is also known for laterally mounting a transformer boiler comprising three phases perpendicular to a vertical barrier. Each phase has circularly fixed fixed contact elements with output wires embedded in a block of epoxy compound. The movable contact systems with resistors rotate and alternate the steps of the transformer control coil, operating in the selector mode under load. The foot controller is located in a housing with a lid.

The disadvantage of this step controller is that it dampens the arcs in oil and pollutes it significantly. The disadvantage is that the contact units wear out unevenly, which limits electrical wear resistance.

Another disadvantage is that epoxy compound castings are heavy and expensive.

SUMMARY OF THE INVENTION

It is an object of the invention to provide a step-by-step regulator for the side mounting of the transformer, which has a power switch with DC and resistors. The foot controller must be located on an insulating plate and have a protective housing with a lid.

The problem is solved with a step regulator containing a vertical insulating plate with a selector and a selector located thereon. The voter has even and odd contact elements circularly arranged and movable even and odd contact units connected via insulating elements to an even Maltese wheel and an odd Maltese wheel. At the top of the Maltese gear is a power switch with VDC and resistors. The foot controller has a protective housing with a lid. With a three-stage step regulator, three phases are mounted on the insulating plate in parallel, which can be insulated against each other. According to the invention, the selector is mounted on the back side of the insulation board and is a greasy insulating cylinder with an insulating bottom and a central insulation tube that is open to the front of the insulation panel. A picker is located next to the voter. On the front of the insulation board there is a mechanism of an even Maltese wheel, an odd Maltese wheel and a two-shoulder translation. A two- or three-VDC power switch is installed next to the Maltese gearbox.

Oil-tight even and odd contact elements are mounted circularly on the isolation cylinder of the selector. On the insulating tube are placed an even current collector ring and an odd current collector ring, from which an even conductor and an odd conductor passing through the opening of the insulation tube are deduced. They are connected to the power switch. In the insulation pipe there is also a conductor at the output of the power switch. It is connected to a through contact element on the insulation bottom.

The two Maltese wheels are mounted at the outlet of the insulation tube and are connected respectively to an even insulating actuator sector having an insulating ring with a tail and to an odd insulating actuator sector with an insulating ring with a tail.

The two insulation rings are mounted on the even and odd current collector rings, respectively, and the even and odd movable contact units are mounted on the tails.

A metal shield is attached to the front face of the insulation board, to which a power switch with a spring energy accumulator (PEA) is mounted. The two-hour translation is driven by a composite metal-insulated shaft through a helical gear and a freewheel clutch. The drive shaft also charges the PEA.

The selector is mounted on the back wall of the insulation board, parallel to the chosen one. It contains an oil-sealed insulation cylinder with an insulating bottom and a fixed contact element connected to the last fixed contact element of a selected one. Both fixed contact elements are mounted on the insulation cylinder, which alternately contact a movable contact assembly. The drive of the movable contact unit is made of insulating rails connected to a drive mechanism. The selector can be mounted on the vertical axis of the selected one or inclined towards it.

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Another variant of the pre-selector is when it is located next to the selector in the oil space of the transformer. It has a fixed contact element connected via a carrier to the last movable contact element of a selected one. Two fixed contact elements are located on an insulating sector which is secured to the insulating plate by means of a stable metal sector. The insulation sector may be cantilevered. The pre-picker movable contact assembly is mounted on a carrier, which is mounted to the fixed contact element through an axis and is connected to the drive mechanism by oil-sealed bearing on the shaft, shoulder and insulation plate.

In a three-phase step regulator, the three phases of the described type are arranged side by side on an insulating plate. Another variant of the step controller is when the insulation plate is horizontal and the selector is vertical. The power switch is mounted below the insulation board. The selector is set above the one selected in conjunction with it. There may be an option where the insulation plate and selector are tilted.

An advantage of the step controller according to the invention is that VDCs are used in combination with resistors. Compared to the reactor stage controller, there are no expensive and heavy reactors that take up a lot of space in the transformer. The advantage is that arcing in resistive power switches is more secure.

An advantage over a butterfly valve with butterfly throttle is that the use of VDK does not contaminate the oil and the electrical resistance is greater.

EXPLANATION OF THE FIGURES Attached

An exemplary embodiment of a step voltage regulator according to the invention is shown in the accompanying figures, of which:

Figure 1 is a longitudinal section through one of the steps of the step controller.

Figure 2 - cross section in front of the Maltese gear.

Figure 3 - cross section through the contact systems of the voter and the elector.

Figure 4 is another variant of a preselector.

Figure 5 is a diagram of the arrangement of the nodes in a three-phase step controller.

Figure 6 is a variant of the step regulator with the selector arranged vertically.

EXAMPLES FOR THE IMPLEMENTATION OF THE INVENTION

Fixed even and odd contact elements 1. through 18 are circularly mounted on insulating cylinder 19 of voter 20. The cylinder 19 has a flange 21 on one side, through which it is mounted on a vertical insulating plate 22 and closed on the other side in a sealed manner. from the insulating bottom 23. In the center of the selector 20 there is an insulating tube 24 on which an even current-withdrawing contact ring 25 and an odd current-withdrawing contact ring 26 are fastened. Maltese is mounted in front of the insulation plate 22 on the outlet of the insulation tube 24. gear consisting of the even-Maltese wheel 27 odd Geneva wheel 28 and the two-armed transfer 29. The tube 24 is anchored on the Maltese gear with a metal shield 30 secured to the insulating plate 22. Inside the tube 24 pass three isolated pro

guide. One of these conductors 31 is connected between an even output of the power switch 32 and an even current collecting ring 25. The second conductor 33 is connected between an odd output of the power switch 32 and an odd current collecting ring 26. The third conductor 34 exits the common output of the power switch 32 goes to contact element 35, which passes oil-tight through the insulating bottom 23.

The even Maltese wheel 27 has a metal drive sector 36 that is connected to the insulation sector 37. The insulation sector 37 is connected to an insulating ring with a tail 38, mounted on the discharge ring 25, and an even movable contact assembly 39 is mounted on the tail. the odd Maltese wheel 28 has a drive sector 40 connected via an insulation sector 41 to an insulating ring with a tail 42 to which an odd movable contact unit 43 is mounted. Sideways from the selected 20 to the insulating plate 22 (FIG. 1, FIG. 3) through a flange 44 is m onset selector 45. It has an oil-sealed insulating cylinder 46 and an insulating bottom 47. Three fixed contact elements are mounted on the insulating cylinder 46: Inlet contact element 48 connected via current connection 49 to contact element 18 of selected 20. Two contact elements 50 and 51 , also referred to as the "+" and the Moving Pin 52 of the selector 45 is switched in a known manner from 51 to 52 and vice versa via insulating rails 53, eccentrically mounted on two arms 54 and 55.

The actuation of the insulation rails 53 is known in a known manner from a gear composed of a lever 56 with a roll 57, a gear sector 58 connected to a lever 56, and a gear sector 59 connected to the shaft 60 of the drive rails 53. A hinged four-link may be used instead of a gear. The two-hand drive 29 has two actuating rollers 61 and is mounted on a shaft 62. In a known manner, through a freewheel clutch 63, the two-hand drive 29 is actuated by a large gear wheel of a gear 64. drive shaft 65 passing oil through the protective housing 66. The protective housing has a cover 67 and a flange 68 by which it is secured laterally to an unmanaged boiler of the transformer.

The selector 45 is shifted relative to the longitudinal axis of the selector 20 to make electrical connection more accessible and to reduce it with a little longitudinal gauge. Alternatively, the selector may be arranged symmetrically on the longitudinal axis, with the axis of contact 48 coinciding with it.

The power switch 32 (FIG. 1) is of a known type and can be either two VDK or three VDK. His device is as follows. Two or three VDK 69 are gripped by metal heads 70 to a flat insulation sector 71. This sector, together with a second flat insulation sector 72, a metal bottom 73, an insulating sector of the cylinder 74 and unpinned reinforcing columns form the supporting structure of the power switch 32. To the metal the bottom 73 is an actuated drive shaft 75, which may have a flywheel 76. An even and odd contact elements 77 are connected to the insulating sector of the cylinder 74, connected respectively to the wires 31 and 33. A contact node 78 is connected in series to VDK 69. eystvan in a known manner from the command disc 79. Movable contact element 80 of the ADC 69 has a contact spring 81 and the current conduction member 82 connected to the wire 34. The actuation of the movable contact element 80 is carried out by

The D-shaped lever 83 and the cam disk 84 mounted on the drive shaft 75. The switch of the power switch 32 is made by a known PEA 85 connected to the drive shaft 75.

Another embodiment of the preselector is shown in FIG. 4. It is located in the space of the transformer. This is permissible as the pre-selector is rarely activated and does not contaminate the oil. A carrier 86 with a fixed contact element 87 is mounted to contact 18 of the selector 20. The fixed contact elements 88 and 89 of the selector are mounted on a cantilever insulation sector 90 of a cylinder, which is connected to the insulation plate by a metal sector 91. A movable contact assembly 92 is mounted on a carrier 93, which is supported by an axis 94 to the fixed contact element 87. The drive of the movable contact assembly 92 is made from a bearing to the insulating plate 22, a oil-bearing shaft 95, which is connected on one side with a drive lever 96 and on the other and - a shoulder 97. As the arm 97 are attached to drive rods insulation 98 associated with carrier 93.

FIG. 5 is a schematic top view of a three-phase step controller composed of three single-phase modules represented in FIGS. 1,2 and 3. The position designations are the same as in these figures but relate to the three phases X, Y and Z. are also resistors 99 which are not visible in FIG.

Figure 6 is another embodiment of a step controller. The selector 100 is arranged vertically on a horizontal insulating plate 101, below which is a power switch

102. The selector 103 is mounted above the selector 100 coaxially therewith. Protective housing 104 with flange 105 is open to selector space 100 to transformer space and closed to power switch 102. Cover

106 provides access to the power switch 102 and the cover

107 - to voter 100 and selector 103.

The action of the step controller is as follows. The drive shaft 65 makes one changeover and feeds the PEA 85. The helical gearbox 64 converts the two-hand transaxle 29 halfway through the changeover. Thus, the odd Maltese wheel 28 and the odd Maltese wheel 27 pass the odd movable contact unit 39 or the odd movable contact node 43 from one adjacent even or odd fixed contact element 1 to 18. Upon completion of the selection from the selector 20, the PEA 85 performs the switching of power switch 32 in a known manner. When the range from 1 to 18 passes, the pre-selector from the fixed contact unit 50 to the fixed contact unit 51 is overturned. Thus, a counter-switching is made by switching on the step winding of the main winding of the transformer. The self-acting coupling 69 allows only a power switch 32 to be reached after reaching the end position and a return without being selected by the selector 20.

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Claims (8)

Patent Claims 1. A step-by-step voltage regulator with vacuum arc chambers for lateral mounting of the transformer, comprising a vertical insulating plate with a selector mounted therein with fixed contact elements, movable contact units, a Maltese gearbox, a laterally selective pre-selector is positioned laterally a power switch with vacuum damping chambers is installed, characterized in that the selector (20) is on the back of the insulating plate (22) and is mounted on the oil pan. insulating cylinder (19) with insulating bottom (23) and central insulating tube (24) open to front of insulation plate (22), pre-selector (45) is located laterally to the selector (20), and to the front of the insulating plate (24) 22) there is a mechanism of an even Maltese wheel (28), an odd Maltese wheel (27) and a two-shoulder translation (29), and a power switch (32) with two or three vacuum choke chambers (69) is installed next to the Maltese wheels (27, 28). Step-by-step voltage regulator according to claim 1, characterized in that oil-even fixed fixed contact elements (2,4,6,8,10,12,14) are mounted circularly on the selector cylinder (19) of the selector (20). , 16,18) and odd fixed contact elements (1,3,5,7,9,11,13,15,17), on the insulating tube (24) are placed an even current collecting ring (25) and an odd current collecting ring (26 ), from which an even conductor (31) and an odd conductor (33), which pass through the opening of the insulation tube (24) and are connected to the power switch (32), and conductive (34) of the terminal of the power switch (32) is also established in the conduit (24) and is connected to a through-contact element (35) of the insulating bottom (23). Step voltage regulator according to claims 1 and 2, characterized in that two Maltese wheels (27,28) are mounted at the outlet of the insulation tube (24) and are connected respectively to an even insulating actuator sector (37). an insulating ring with a tail (38) mounted on the even current collecting ring (25) and with an odd insulating drive sector (42) with an insulating ring with a tail (42) bearing on the odd current collecting ring (26) and on the corresponding queues (38,42) an even movable contact unit (39) and an odd movable contact unit (43) were installed ). Step-by-step voltage regulator according to claims 1,2 and 3, characterized in that a metal shield (30) is attached to the front face of the insulating plate (22) to which a power switch (32) with a known PEA (85) is mounted. Step-by-step voltage regulator according to claims 1, 2, 3 and 4, characterized in that the two-arm translation (29) is connected to a composite metal-insulated drive shaft (65) by means of a helical gear (64) and a freewheel clutch (63), such as the drive shaft (65) is also coupled with PEA (85). Step voltage regulator according to claims 1,2,3,4 and 5, characterized in that the pre-selector (45) is mounted on the back wall of the insulating plate (22) next to the selector (20) and contains an oil-tight insulation cylinder (46) with insulating bottom (47), a fixed contact element "·" · · · · · · 4 · · · · · · · · · · · · · · · · · · · · · · · · · (48) connected to the last fixed contact element (18) of a selected (20), two fixed to the insulation cylinder (46) fixed contact elements (50,51) and movable contact unit (52 ) connected to a drive mechanism (56,57,58,59) by means of insulating rails (53), the axis of the fixed contact element (48) may coincide with or be inclined towards the vertical longitudinal axis of the selected one (20). Step voltage regulator according to claims 1,2,3,4 and 5, characterized in that the pre-selector is located in the transformer space and has a fixed contact element (87) fixed by a carrier (86) to the last fixed contact element (18) of selected (20), two fixed contact elements (88,89) located on an insulating sector (90), mounted cantileverly through a metal sector (91) to the insulating plate (22) and a movable contact assembly (92) mounted on a carrier (93) fastened to the fixed contact element (87) by means of an axis (94) and connected thereto m actuator (96) by oil-sealed bearing to the insulating plate (22) shaft (95), arm (97) and insulating rails (98). Step voltage regulator according to claim 1, characterized in that the insulating plate (101) is horizontally mounted, above it is mounted a selector (100) with a vertical axis, in accordance with the selected one (100) a pre-selector (103) is mounted. , and the power switch (102) is located below the insulating plate (101), allowing the variant of the insulating plate (101) and the axis of the selected one (100) to be inclined. Attachment: 6 figures Literature: 1. "Load Tap Changer Type RMV-II-1500A". Instruction Manual, Reinhausen Manufacturing, USA 2. "Design Guide On-Load Tap-Changers Type UZ, UB". ABB Components • « 4 · · • * · ♦ · • • Ф · · ♦ · « • · · • · · · «· · • · · • · · • · • · · • 9 «·· ··· ···· ··· ·· (54) STAINLESS VOLTAGE REGULATOR C VACUUM ARCHING CHAMBERS FOR SIDE ASSEMBLY OF THE TRANSFORMER The foot controller regulates under voltage the load of power transformers. It is mounted sideways on the transformer boiler. Its power switch works with vacuum arc chambers (VDC) and resistors. On the rear face of the vertical insulating plate (22) is a selector (20) housed in an oil seal insulating cylinder (19) with an insulating bottom (23). Even (8,18) and odd (7,17) fixed contact elements connected to current collecting rings (25,26) via movable contact units (39,43) are mounted on the insulation cylinder. The selector (45) is located next to the selected one (20) and has an oil seal insulation cylinder (46) with an insulating bottom (47). A metal shield (30) with Maltese wheels and a two-link translation (29) are mounted on the front face of the insulating plate (22). ). A power switch (32) with two or three VDK (69) and a resistor (99) is attached to the metal shield (30). The power switch (32) and the Maltese gearbox (27,28,29) are housed in a protective housing (66) with cover (67) and flange connection (68) to hold the transformer coil.