MXPA97006570A - Interrup assembly - Google Patents

Abstract

The present invention relates to a switch that includes a housing that encloses electrical components that have blades that open open gaps visible in an open position. The switch includes an arrangement of operating controls and vision provisions to observe the open blades. The operation controls and the vision provisions have access from a first direction and are arranged in a first area of the housing while the cable interconnection provisions have access from a second direction and are arranged in a second area of the housing . In this way, the operating personnel can use the vision provisions and the operation controls without being exposed to the area of the cable interconnections. In a specific arrangement, an arrangement of operational screens is provided, the screens cover vision provisions and are movable to allow the use of vision provisions. In a preferred embodiment, the switch includes multiple pole switch assemblies, which are assembled from individual pole unit assemblies. Multi-pole switch assemblies are mounted to a housing along an individual edge or corner of the interrupt assembly

Description

SWITCH ASSEMBLY DESCRIPTION OF THE INVENTION The present invention generally relates to a switch for the electric power distribution field, and more particularly to a switch that facilitates most operations without exposure to the high voltage environment adjacent to the cable terminations and the like. The switches are generally categorized through several categories and aspects such as: installation location (for example, grade or surface, underground, etc.); the configuration of components (for example, load switches, fuses, fault interrupters, disconnectors, sectioners, etc.); cable connections (eg, elbows, cable terminators); the accessibility of components and controls; the medium within the switch enclosure, for example, air, vacuum, oil, gas (such as SFg), etc .; and additional aspects such as fault indicators, voltage indicators, power operation, automatic fault interruption control. For example, the switch incorporating the combination of a vacuum interrupter with a series of visible disconnection connected is described in U.S. Patent No. 4,484,046. In the aforementioned U.S. Patent No. 4,484,046, the visible disconnect is also grounded when moving to the open position. Another arrangement, RGC type switch available from ABB and illustrated in NH Catalog Publication 5194 E, uses a circuit breaker and a series disconnect that is visible and grounded in an open position, the circuit breaker and the disconnector are arranged in a SFg environment Another arrangement described in U.S. Patent No. 5,508,486 is directed to an insulated gas switch having output passages and an actuator device for the internal multi-pole vacuum interrupter and a multi-pole circuit breaker on a wall front of the switch housing, the vacuum interrupter tubes are arranged at right angles to the front wall and the axis of rotation of the arrow of the circuit breaker which is horizontal and parallel to the front wall of the housing. Since these prior art arrangements may be useful in providing a switch of various configurations, the above arrangements are more well known to operate and require exposure to the area of high voltage cables, they do not offer a desirable view of the open hole of the cables. internal switches and do not include basic configurations or aspects that allow the switch to be installed in different environments and in different mounting configurations. The switch that mitigates many of these disadvantages is shown in U.S. Patent No. 5,521,567. However, some additional operational and structural aspects may be desirable to improve the utility and production capacity of this type of switch. Accordingly, it is a principal object of the present invention to provide a desirable configuration of the switch for ease of operation and vision of the open gap of internal switches without exposure to any high voltage. It is another object of the present invention to provide a switch that includes viewing window arrangements, mobile information screens that cover the viewing windows and operation controls, all accessible without any exposure to cable interconnections. It is a further object of the present invention to provide a switch having excellent production capacity characteristics, ensure accurate alignment of components and be adaptable to provide a variety of component configurations. Another object of the present invention is to provide switch component assemblies that are easily assembled from pole unit assemblies, which are easily obtained with different configurations.A further object of the present invention is to provide multiple pole switch assemblies that are adapted to be assembled from an individual edge of the assemblies, such that an arrangement of such multiple pole assemblies is mounted within a housing on a surface narrow flat. These and other objects of the present invention are efficiently achieved through the provision of the switch, including a housing that encloses the electrical components, which have blades that establish visible open gaps in an open position. The switch includes an arrangement of operation controls and provisions to observe the open blades. The operation controls and the observation provisions have access from a first direction and are arranged in a first area of the housing, while the cable interconnection provisions have access from a second direction and are arranged in a second area of the accommodation. In this way, the operating personnel can use the vision provisions and the operation controls, without exposing the area of the cable interconnections. In a specific arrangement, an array of operational screens is provided, the screens cover vision provisions and are mobile to allow the use of vision provisions. In a preferred arrangement, the switch includes multiple pole switch assemblies, which are assembled from individual pole unit assemblies. The multi-pole switch assemblies are mounted to the housing along an individual edge or corner of the switch assembly. BRIEF DESCRIPTION OF THE DRAWINGS The invention, as well as its organization and method of operation, together with other objects and advantages thereof, will be better understood by referring to the specification taken together with the attached drawings in which: FIGURE 1 is a perspective view of the switch according to a first embodiment of the present invention; FIGURE 2 is a view in right lateral elevation of the switch of FIGURE 1 partially in section and with two parts cut away for clarity; FIGURE 3 is a diagrammatic representation of the switch of FIGURES 1 and 2 illustrating the aspects and operation of the switch; FIGURE 4 is a perspective view of a second embodiment of the switch according to the present invention; FIGURE 5 is a diagrammatic representation of the display of a screen for the switch of FIGURE 4; FIGURE 6 is a left side elevation view of the switch of FIGURE 4, partially in section and with two parts cut away for clarity; FIGS. 7-9 are respective top plan views, and side elevational, front and right views of the switch display of FIGURES 4 and 6; FIGURES 10-12 are respective perspective, front elevation and top plan views of a multiple pole unit assembly of the switch of FIGURES 4 and 6; FIGURE 13 is a perspective view of a mounting channel for the multiple pole unit assembly of FIGURES 10-12; FIGURE 14 is a perspective view of a pole unit assembly of the multiple pole unit assembly of FIGURES 10-12; FIGURE 15 is a perspective view of the pole unit assembly of FIGURE 14 with one of the support sheets removed for clarity; FIGURE 16 is a partial perspective view of a pole unit assembly similar to FIGURES 14 and 15, but with additional aspects for the operating voltage FIGURE 17 is a partial perspective view of a similar pole unit assembly to FIGURES 14 and 15, but including a fault switch; FIGURES 18 and 19 are perspective views of respective portions of the upper and lower housing housing for the switch of FIGURES 4 and 6; FIGURE 20 is an elevational view partly in section and with parts cut away for clarity, illustrating a separator separating the switch of FIGS. 1-19; FIGURE 21 is a diagrammatic illustration of dielectric stress, using conventional fastening and support methods; FIGURES 22 and 23 are views in right lateral elevation and upper plan respectively, of the separation separator of FIGURE 20; FIGURE 24 is a diagrammatic illustration of the separation separator of the present invention of FIGURE 20; and FIGURE 25 is an electrical schematic block diagram of portions of the screen and test aspects of the switch of FIGURES 4-19. Referring to FIGURES 1-3, switch 10 of the present invention provides several predetermined configurations / combinations of circuit breakers and erasable fault interrupters, in a switch line having a pressurized, gas-filled volume, within a housing 200 The housing 200 is an elongated, monocoque shell with a polygonal cross section to provide clear, adequate and predetermined functions in structural strength, mounting and support of the various components, for example, the circuit breaker 202 illustrated in FIGURE 2. The switch 10 defines one or more viewing windows, for example 204, along an upper surface 206 of the housing 200, preferably arranged as an aligned row or first array 205 with a viewing window, for example 204, immediately aligned above a or more blades 203 of each circuit breaker 202 or other interrupting component, for example, as shown a in FIGURE 2, the viewing windows 204, 208, 210 and 212 are disposed above a respective circuit alignment of a first circuit breaker, an erasable fault interrupter and second and third circuit breakers. A second aligned row or second array 215 of controls, for example, illustrative operation selectors 214, 216, are also provided along the upper surface 206 of the housing 200. The second arrangement 215 is separated from the first array 205 of the viewing windows, with the general views defined in general through each of the arrangements 205 and 215 which are generally parallel. Operation selectors such as 214, 216 are used to operate the erasable breakers and fault interrupters through a removable handle 244 shown in FIGURE 6. As shown in FIGURE 2, operation selector 216 is for operation of a three-pole circuit breaker and the operation selector 214 is for the operation of a trip function of an erasable fault switch of one to three poles. It should also be understood that with other provisions, the third provision 215 also incs indicators, test aspects, etc. The control housing 217 extending towards the rear of the housing 200 is provided for the path control of the erasable fault switch components. The blade 203 is shown in the closed position in FIGURE 3. The open position of the blade 203 is designated "O", while a third ground position is referred to as "G". The plane of rotation defined by the operating positions of the blades 203 is generally perpendicular to the upper surface 206. The blades 203 are operated through a link generally designated 246 connected to a switch operating arrow 248. The operating arrow of switch 248 is activated through an operation mechanism generally designated 250 and operation through operation selector 216 through an operation arrow 242. Switch operation arrow 248 is disposed generally parallel to each of the surface upper 206 and front surface 224. Switch 10 also incs a third aligned row or third arrangement 218 of external interconnections such as bushings 220 for connection to elbow connectors or the like, which end in power distribution cable of a power distribution system. The third arrangement 218 of the external interconnects provides electrical connection to the various internal electrical components such as each pole of the circuit breakers 202 and erasable fault interrupters. The third arrangement 218 of bushings 220 is generally disposed along the front surface 222 of the housing 200, and more specifically in a preferred embodiment along a surface 224 that is inclined with respect to the generally vertical front surface 222. In a preferred embodiment, the general direction generally defined by the third arrangement 218 is generally parallel to the first and second arrangements 205, 215.

Accordingly, the first arrangement 205 of the viewing windows and the second arrangement 215 of the controls, are disposed along a first surface 206 of the housing 200 and the third arrangement 218 of the bushings 220 for provisions for cable interconnection, (for example, to connect to elbows in the cables) are disposed along an angled front surface 224, spaced apart from, and forming an angle "a" with respect to the surfaces on which the first and second arrangements are located. 205 and 215. The angle "a" can be termed as generally perpendicular. In a specific arrangement, the angle "a" is about 100 degrees, while it has been found desirable at a range of 90-110 degrees. The first and second arrangements 205 and 215 of the viewing windows and controls can also be characterized as having access to them from a first direction and being arranged in a first area of the housing 200, while the third arrangement 218 of the external interconnects it has access from a second address and is arranged in a second area of the housing 200. Of course, it should be noted that the first arrangement 205 can be characterized as being located in the first area, the second arrangement 215 is located in the second area and the third arrangement 218 is located in a third area, wherein the first and second areas, each have access from a first address, and the third area has access from the second direction. In this way, and in accordance with the important aspects of the present invention, the switch 10 provides desirable operating characteristics and convenient operation in various orientations and mounting environments. Thus, the view of the position of the blades 203 through the viewing windows, for example 204, and the operation of the blades 203 through the controls, for example the operation selector 214, can be realized from a first position with respect to the upper surface 206. From this first position, there is no exposure to, or no interference from the cable terminations on the bushings 220. Furthermore, the handling of the wires in the bushings 220, for example for connection and disconnection of the elbows, it can be performed from a second convenient position on the front of the switch 10. For example, referring to FIGURE 3, the operating personnel 228, can see the open position of the blade 203 from a position above the switch 10 generally along the first generally designated direction 252, while standing on a surface generally mentioned at 226. Lo s controls, for example, the operation selector 214, can be operated and / or the viewing windows, for example, 204 can be used for a kneeling or cross-over position. The switch 10 is located in a hole below the surface 226, facing towards the switch 10 and operating the controls (for example the selector 214) of the second arrangement 215, can be made from the surface 226 without entering the hole and without be exposed to the environment of the bushings 220 and associated cables. In addition, it is desired to disconnect the wires from the bushings 220, the operating personnel can manipulate the wires with a shotgun rod or the like, while remaining on the surface 226 from a position opposite the switch generally along a second direction called generally 254, that is, the second position presented above. These operations are performed without entering the hole. The switch 10 can also be arranged so that the upper surface 206 with the provisions of the viewing windows and controls is generally vertical, while the bushings 220 are arranged to be generally oriented up or down for convenience of operation. Of course, in other arrangements it must be obtained that the switch 10 is arranged within an enclosure of the various types available for the bearing-mounted gear. For example, as shown in FIGURE 1, lower end panels with support legs 230, 232 are provided on the housing 200 for use in an enclosure and for mounting on a surface. In addition, upper end panels are provided with lifting brackets 234, 236 for use in the transport and operation of the switch 10. The housing 200 may be manufactured from various materials (eg, medium-gauge 7-gauge steel) or insulating materials, as suitable for specific structural support requirements. In this way, the switch 10 via the predetermined configuration of the housing 200 and the arrangement of the third external interconnection arrangement 218, the first arrangement 205 of the viewing windows and the second control arrangement 215, provide an alignment of switch circuits. versatile that facilitates the characteristics of desirable operation and that is capable of being assembled in various configurations and desirable orientations. For example, with switch 10 located in a hole with the relative position as shown in FIGURE 3, the operating personnel can perform all operations such as interruption, isolation, grounding, voltage testing, phase placement without No exposure or access to high voltage areas. This is possible since direct observation of the position of the blades 203 and access to the operating controls are readily available to personnel from above and from the first direction 252. For those operations that require elbow / cable manipulation to Through a heat rod or the like, access is from the front of the switch from the second direction 254. As described in the Patent of the States No. 5,52i, 567 mentioned above, switch 10, in a preferred embodiment, also includes a complete internal and integral system to satisfy the desirable operating practices to remove power, test and ground the circuit before working in the same. Considering now other important aspects of the invention and now referring to FIGS. 4-9, the switch 20 of FIGURE 4 also includes one or more screens, for example 24, which provide information regarding the state of the circuit and components of the switch 20. Screens such as 24 are located along the upper surface 206 of the housing 200, preferably arranged as an aligned row or a fourth arrangement 26, with a screen, for example 24, in order to cover (is say, immediately align above) one of the viewing windows, for example 204. For example, as shown in FIGURE 4, the screens 24, 28, 30 and 32 are disposed above the viewing windows 204, 208 , 210 and 212, respectively. The screens 24, 28, 30 and 32 are pivotally mounted along the axis 34 with respect to the housing 200 so that the screens 24, 28, 30 and 32 can be raised to allow observation through the windows 204, 208 , 210 and 212 respectively with an observer placed on the controls of the array 215, for example, from the first address 252 as shown in FIGURE 3. In this way, with the screens as shown in FIGURE 4, they can be producing circuit conditions through the information on the screens, while in the open position, located at 24 'in FIGURES 4 and 6, the position of the switches can be directly observed. In addition, screens 24, 28, 30 and 32, when in the closed position of FIGURE 4, also function as pulse covers on respective windows 204, 208, 210 and 212, for example, to avoid any effect of impulse through the windows to observe what may happen during the interruption operations when fault conditions are present. As seen in FIGURE 6, the window 204 is assembled to provide a seal to the housing 200 through a frame member 44 around the perimeter of the window 204 and fasteners 46, which hold the frame member 44 and the window 204 against the inner surface of the housing 200, a sealing agent or the like is provided between the upper surface of the perimeter of the window 204 and the housing 200. The fasteners 46 are secured to the housing 200 through threaded studs 47 extending from the housing 200 and which pass through the fasteners 46 and the threaded notches 48 on the uprights 47 to provide appropriate clamping forces. In a specific arrangement, each of the screens 24, 28, 30 and 32 includes a display panel 40 with various indicia and indicators to represent the energized / de-energized state of each pole of the circuit breaker or fault interrupter. For example, a diagrammatic representation of the arrangement 50 of the indicia and indicators of an illustrative display panel 40 is shown in FIGURE 5. Specifically, each pole includes a voltage indicator 52 and a line diagram 54 representing the electrical circuit and the circuit breaker or fault interrupter (a circuit breaker is illustrated in FIGURE 5). A test indicator 60 and a voltage indicator 52 provide information on the operable state of the display panel 40 and the integrity of the voltage perception system for each pole. Reference may be made to the aforementioned U.S. Patent No. 5,521,567 for further discussion of the voltage perception integrity test. The signals of voltage perception and circuit test are provided through conductors in a cable 241 (FIGURES 4 and 6) for each of the panels-, of screen 40, the cable 241 is connected to a sensor (not shown) disposed on the cable terminals 220. In the illustrative example of the display panel 40, the test indicator 60, displays a predetermined test symbol, for example , a solid circle, when the screen panel 40 is properly sequenced for testing. In the specific illustration, for test purposes, the screen 24 is operated through a solar panel 64. In addition, a test driver 66 is provided that includes a transparent window on an optical switch 66. The screen panel 40 is set to die. to actuate the test sequence in the pickup to the light lock on the optical switch at 66, while the eolar panel 64 is illuminated enough to provide power to operate the display panel 40 and the test circuit. In this way, after the user covers the test actuator 66, the test symbol display on the test indicator 60 provides a guarantee that the display panel 40 is properly actuated and fully functional. With the test indicator displayed at 60, the user can then find out the operating capacity of each voltage indicator 52 and the integrity of the voltage sense circuit for that corresponding pole. In a specific embodiment, the voltage indicator 52 emits the energized symbol, for example, an illuminated bolt or the like, in the test mode to verify that the voltage indicator 52 is functional and that the voltage perception circuit is fully functional and confiable. After this test function, that is, after the operator unlocks the transparent window on the optical switch at 66, the energized / de-energized state of each pole can then be ascertained through the state of the voltage indicator 52 provided for each respective pole, for example, 52b and 52c for the respective second and third poles of the display panel 40. In a specific embodiment, since the voltage indicators 52 are arranged for normal operation, the operator prior to basing on the absence of the symbol energized in the voltage indicator 52, activates the test mode of the screen 40 through the accessory at 66 and observes the test symbol at 60 and verifies the presence of the energized symbol at 52 to determine the appropriate operation. Without such an appropriate test, the voltage indicators 52 on their own, could only function as ordinary indicators as can be seen in the prior art.

Referring now to FIGURE 25, the test circuit 90 of the display panel 40 is activated by the solar panel 64 and driven by the test actuator accessory at 66. When the optical switch 92 is turned off by blocking the light at 66, the optical switch 92 through the path 94 activates the power regulator stage 96. The energy regulator stage 96 supplies power to the power converter and signal generator stages referred to in 98, which drive the test indicator 60 with a suitable alternating wave signal at 100. The alternating wave signal at 100 through an overvoltage protection stage 102 provides signals at each stage at 104, which are connected to the test line directed on the cable 241 (FIGURES 4 and 6), to the bushing sensors 105 located in the terminations 220. This signal path tests the integrity of the entire perception circuit. If the perception path is fully operational, the signal will be returned to 106 on the sensor bushing lines 105. The signal at 106 is then processed through an energy condition and logic stage 108 which provides protection and the waveform of desired indicator at 110 to activate the voltage indicator 52, for example, a scintillation signal. Accordingly, the test circuit 90 of the display 40 when driven through the test drive accessory at 66, verifies the integrity of the sensor signal paths and activates the voltage indicators at 52 also to test the integrity of the sensor. the voltage indicators 52. As discussed above, if the voltage indicator 52 is not operated during the test mode with the test indicator activated, the operator is alerted that the voltage indicators 52 are not working and are not powered . Referring now to FIGS. 7-9 and considering the specific structure of the illustrative screen 24, the screen 24 includes a cover member 70 that is preferably fabricated as a molded part and provides a receptacle 72 for the display panel 40. rear edge 74 of cover member 70 includes a sloping, straight edge 76, which is set to have contact with upper surface 206 of housing 200 when pivoted to define a stop for the open position of cover member 70 and screen 24. Along the rear edge 74 the cover member 70 also includes pivot bearing holes 78, 80 for receiving pivot pins 82 (FIGURE 6) along the axis 34, the pivot pins 82 are supported by members of flange 83, extending from housing 200. Referring additionally to FIGS. 10-13 and in accordance with important aspects of the present invention, in a fashion Preferred condition of the circuit breaker 202 is a multi-pole unit assembly, for example, as specifically illustrated in FIGURES 2 and 3, the circuit breaker 202 includes three poles. The circuit breaker 202 is suspended with respect to the housing 200 through a support channel 270 (FIGURES 2, 6 and 13). The support channel 270 (best seen in FIGURE 13) is attached to the inner wall of the upper surface 206 of the housing 200 (FIGURE 6). The circuit breaker 202 fixes the support channel 270 (FIGURE 6) through fasteners 272, which are threaded in the sleeves 273 in the support channel 270. As can be seen in FIGS. 10-12, the fasteners 272 extend through openings 274 in mounting flange 276 of operating mechanism 250 and additional mounting flanges, for example 278, 280 and 282 of circuit breaker 202. As seen in FIGURE 6, the arrow of operation 242 extends through of the support channel 270 and the upper surface 206 of the housing 200 through the opening 243, the arrow 242 also includes suitable seals not detailed in detail. It should be noted that mounting the circuit breaker 202 from an individual or machine edge of the parallelepiped assembly, generally rectangular not only simplifies the assembly and allows flexibility in the configuration of the assembly 202 but also minimizes the structural stiffness requirements for the housing 200 in relation to the alignment and assembly of the components. In addition, this technique places the assembly 202 centrally within the housing 200, while also providing support and alignment for the operation selectoree 216 and the operation arrow 242 which impels the operation mechanism 250. In order to obtain the desired structural stiffness with particular materials, one or more pegs 240 may be provided along the upper portion of the housing 200 as shown in FIGS. 4 and 6. When talee coetillae 240 is provided, the rib 240 may also be used for Eoport the pivot pins 82 of the screen, for example 28, in place of the flange members 83. In accordance with important aspects of the present invention and with reference to FIGURE 10, to improve the visibility of the blade 203 in the various positions, that is, closed, open and to ground, and especially the open position to observe the open, visible gap, the circuit breaker 202 includes apertures 290 disposed in a predetermined manner, and furthermore the colors of the various components of circuit breaker 202 are selected to improve visibility. For example, support sheets 301, 303 are black knife portions 292 of blades 203 are silver, and portions 294 of blades 203 are orange. Thus, in this way, the silver color of the blade portions 292 is easily visible, and the orange portions 294 help to focus the position of the open gap. Returning now to a more detailed discussion of the individual pole units of the circuit breaker 202, the circuit breaker 202 includes three pole unit assemblies 296, 298 and 300, the center pole unit 300 includes the operation mechanism 250. Referring now further to FIGS. 14-15, illustrative pole unit 300 includes support sheets 302, 304. Support sheets 302, 304 are non-conductive and are arranged so as to be spaced apart and generally parallel to each other with the components and interconnects mounted therebetween and with respect to the support sheets 302, 304. The support sheets 302, 304 are separated and fastened together through separate dispositions generally mentioned at 309, for example, as specifically illustrated in FIG. 15, sleeves 308 and bolts 310 passing therethrough. In this case, the support sheets 302, 304 support and provide suitable alignments for and between the components as well as provide electrical insulation between the support points of the illustrative unit pole assembly 300. In addition to the blade 203, the components of the Pole unit 300 includes a fixed contact assembly 320, a manifold interconnecting conductor 322 that is provided for interconnection with the fixed contact 320 through a manifold (not shown) of the circuit alignment, an interconnect assembly 324 for connecting the movable blade 202 to the bushing 220 and a ground interconnect assembly 326. Further, the operating mechanism 250 is attached to the pole unit 300 via eyelids cooperating with extension tabs 330 of the operating mechanism 250 and a support and a guide bracket 332 fixed to the operating mechanism 250 and fixed between the support sheets 302, 304 through fasteners. An operating spring housing 334 is carried by the support and guide rail 332. The operation reverse housing 334 includes a load link 336 connected to the operating mechanism 250 and a drive link 338 that provides driving force of input the operation mechanism 250. Now considering in more detail the circuit breaker assembly 202, the three-pole circuit breaker assembly 202 is formed by combining and jointly securing three pole unit assemblies 296, 298 and 300, which are appropriately separated and clamped together through the clamping arrangement generally designated at 350. In addition, the provisions from pole to pole, spacer / support 352, 354 are provided between each of the respective pole unit assemblies 296 and 298 and are located approximately halfway along the trailing edge (left in FIGURE 12) of the assemblies of the pole unit. In accordance with the important aspects of the present invention, the spacer devices 309, the pole-to-pole spacer / support structures 352, 354, and the securing arrangement 350 have variable dimensions in the specific embodiments of the present invention to provide disjunctures. They have different specifications of operating voltage and different levels of basic insulation, for example, in the range of 95-150 kV. In addition, and with further reference to FIGURE 16, the circuit breaker of FIGURES 10-15 is provided with an additional phase barrier 360 to achieve a higher voltage rating for the circuit breaker 202 through separator arrangements 362 fixed to the sheet. 301, a phase barrier 360 is additionally provided between each of the pole unit assemblies 296, 298 and 300, as well as outside the pole unit 296. In a specific embodiment, a runner is also added. cylindrical arch 364 in the main fixed contact 326 (FIGURE 14). Referring further to FIGURE 17, the switch of the present invention also includes fault interrupters, a pole assembly 370 which is shown in FIGURE 17 with one of the support sheets 372 removed for clarity. The fault switch pole assembly 370 is similar to the pole assembly of the circuit breaker 300 of FIGS. 10-15, with the assembly 370 which also includes a vacuum interrupter 374, an actuator link 376 and a circuit breaker operating mechanism. 'fault which is similar to operating mechanism 250, but which also includes a fault switch output 380 for operating fault switch 374. Reference may be made to U.S. Patent No. 5,504,293 for a more detailed discussion of This type of operating mechanism. The main fixed contact at 380 is connected through the arrangement 382 to a first contact 384 of the fault switch 374, a second contact 386 of the fault switch 374 is connected to a pole collector arrangement at 388. The parts and components The remaining of the assembly of the pole unit 370 are generally similar to the pole unit 300. Since the support sheets of the pole units (for example, the support sheets 302, 304 of the pole unit 300) support and assembled components energized and grounded on the same pole unit, dielectric voltage should be considered as a factor. For example, referring now to FIGS. 20-21, with illustrative energized component 390 and illustrative ground connected potential component 392 mounted in the range of 10-12 cm (approximately 4-5 inches) spaced apart on the carrier sheet. 302, the dielectric stress occurs at the mounting locations generally referred to at 394, 396. As illustrated in FIGURE 21, if conventional metallic emberers are used, such as bolt 398, to mount the component, a high hold in a hole occurs. relatively small denominated at 391. This dielectric voltage reduces the maximum operating voltage and the basic baling levels. Considering now the additional important aspects of the present invention for reducing the dielectric strength in the mounting locations of the components within each of the pole unit assemblies 296, 298 and 300 of the die assembly 202, spacing separators 393 are provided in the mounting locations 394, 396. The conventional fasteners 398 are disposed through the spacing separators 393. Referring now further to FIGS. 22-23, the spacing spacers 393 include a ring of flared shield 395 and a narrow sleeve portion 397 that functions as a separating member. Both the flared guard ring 395 and the narrow cuff portion 397 are conductive. With this arrangement, and now referring further to FIGURE 24, the dielectric strength in the recess 391 in the support sheet 302 is reduced with the widened protection ring 395, avoiding the concentration of tension in the recess 391. It has been found that an adequate reduction in the dielectric stress is achieved with the projection of the flared guard ring 395 mentioned at 399 being in the range of one to two times the width of the narrow sleeve portion designated at 401. As can be seen in FIGURE 22, preferably spacer separator 393 includes a crimped sleeve portion 403, which provides increased retention and alignment stability of the components. Since it is not necessary to make and use the invention, it is theoretically envisaged that the flared protection ring 395 combined with the separation distance 401 protects the gap 391 formed between the wall and the support sheet 302, the component 390, and the environment of surrounding fluid, that is, at the triple point of the interface. Accordingly, separation separators 393 are used in pole unit assemblies 296, 298 and 300, for example at locations 309 in FIGURE 15. Now considering the assembly of switch 10 and , and now referring further to FIGS. 18 and 19, the housing 200 is provided through an upper housing portion 400 and a lower housing portion 402. The upper end panels 236, 238 are affixed to the housing portion. upper housing 400, and lower end panels 230, 232 are fixed to the sides of lower housing portion 402. After several pole unit assemblies, such as circuit breaker 202 are mounted within upper housing portion 400 through the mounting channels 270, and the desired electrical connections are made to the terminations 220 and the desired intercooler connections are made between the various pole unit assemblies, the upper housing portion 400 with the assembled pole unit assemblies; , and the lower housing portion 402 are assembled, for example, through welding, along their seams. The assembly is then sealed and pressure is applied with a suitable insulating medium, eg, SF6 gas. Since several modalities of the present invention have been illustrated and described, it will be apparent that various changes and modifications may occur to those skilled in the art. Accordingly, it is intended, in the appended claims, to cover all such changes and modifications as fall within the true spirit and scope of the present invention.

Claims (48)

1. CLAIMS 1. A switch, -, characterized in that it comprises: a housing that encloses electrical components; viewing means located in a first area of the housing to see predetermined portions of the interior of the housing; and screen means positioned to cover the viewing and selectively movable means with respect to the housing to provide access to the viewing means. The switch according to claim 1, characterized in that the display means comprise voltage indicating means responsible for the electric components to display a representation of the energized state of the electrical components. The switch according to claim 1, characterized in that the vision means comprise one or more transparent portions in the housing. The switch according to claim 1, further characterized in that it comprises operating control means located in a second area of the housing for operating one or more of the electrical components, and electrical interconnection means located in a third area of the housing for providing electrical interconnection from one or more of the electrical components to the exterior of the housing, and viewing means and operating control means having access from a first direction with respect to the housing, the electrical interconnection means, having access to from a second direction with respect to the accommodation. 5. The switch according to claim 4, characterized in that the first and second directions are generally perpendicular to each other. The switch according to claim 4, characterized in that the electrical components establish open open spaces in an open position, the viewing means are located to see the open openings visible, the viewing means comprise one or more transparent portions in the accommodation. The switch according to claim 4, characterized in that the viewing means and the operation control means are located on a first surface of the housing, and the electrical interconnection providing means are located on a second surface of the housing. The switch according to claim 7, characterized in that one of the electrical components includes a blade that moves between a predetermined operating position in order to define a plane which is generally perpendicular to the first surface. The switch according to claim 8, characterized in that the first and second surface are generally perpendicular to each other. The switch according to claim 1, characterized in that the screen means are generally flat and of the same size and general shape, as the viewing means. The switch according to claim 10, characterized in that the screen means are pivotally mounted with respect to the housing and located immediately above the viewing means so as to be able to cover the cooking medium in a predetermined closed position. The switch according to claim 1, characterized in that the screen means comprise control means for actuating a test sequence of the screen means and for testing the integrity of said screen means. The switch according to claim 1, characterized in that the display means comprise means for representing an electrical circuit defined by the electrical components and means for indicating the energized state of the electrical means, the indication means are arranged within the means of representation-, 14. The switch according to claim 1, characterized in that the screen means define a first axis, the viewing means have access from a second direction, and the first axis is generally perpendicular to the second direction. The switch according to claim 1, characterized in that the control means for operating the electrical components, the electrical components include multiple pole switches, each multiple pole switch includes an operating mechanism and an operating arrow, the means of operation are attached to the operation arrow. 16. The switch, characterized in that it comprises a housing and a plurality of component assemblies, each of the component panels define a total polyhedral volume and are supported with respect to the housing at a predetermined location of the housing and with respect to a predetermined corner of the component assemblies. The switch according to claim 16, characterized in that the component assemblies have a rectangular parallelepiped shape and are supported along one edge of a plane of the general rectangular parallelepiped. 18. The switch according to claim 17, characterized in that the housing is generally defined by a polygonal cross section. 19. The switch according to claim 18, characterized in that the component assemblies are provided with respect to a first flat surface of the housing and generally along a first direction so that the component assemblies define a first arrangement to along the first direction. The switch according to claim 19, characterized in that it comprises means for defining a second arrangement of viewing area in the housing along a second direction, the viewing areas of the eetán dispueetae on predetermined portions of the component assemblies, the second direction is generally parallel to the first direction. The switch according to claim 19, characterized in that the component assemblies comprise one or more pole unit assemblies, each of the pole unit assemblies includes electrical components, at least two generally planar support members, separate, and means for supporting the intermediate electrical components to the generally flat, spaced support members. 22. The switch. according to claim 21, characterized in that at least one or more of the pole unit assemblies includes an operating mechanism for operating the electrical components. 23. The switch according to claim 22, characterized in that the electrical components of one or more pole unit assemblies comprise a multiple pole switch having two or more operating positions, the operating mechanism includes means to operate the circuit breaker. multiple poles between two or more operating positions. The switch according to claim 23, characterized in that it comprises control means extending through portions of the housing and external to the housing to control the operation of the operating mechanism. 25. The switch according to claim 23, characterized in that the predetermined location of the housing in which one or more of the pole unit assemblies are supported, is adjacent to the respective operating mechanism. 26. The switch according to claim 17, further comprising a mounting member fixed to an internal wall of the housing and means for securing the component assemblies to the mounting member. 27. The switch in accordance with claim 16, characterized in that the housing includes first and second housing portion arrangements to interfit and provide a closed volume, the component assemblies are provided with respect to the first housing portion. 28. The switch according to claim 16, characterized in that the component eneambles include multiple pole configurations of medium voltage electric components. 29. A multi-pole switch assembly for a medium voltage switch having electrical components that define a multi-pole switch, the multi-pole switch assembly is characterized in that it comprises a plurality of pole unit assemblies and means to mount the pole unit assemblies to provide the multi pole switch reactor, each of the pole unit assemblies generally includes two generally flat, spaced support members. and means for severing the intermediate electrical components to the two generally flat, spaced support members. 30. The multi-pole switch assembly according to claim 29, further characterized in that it comprises operating mechanism means attached to one or more of the generally flat support members for the operation of the multi-pole electrical switch. _ 31. The multi-pole switch assembly according to claim 30, further characterized in that it comprises means for euspending the multi-pole switch assembly with respect to a predetermined mounting surface. 32. The multi-pole switch assembly according to claim 29, characterized in that the multiple pole electrical switch includes electrical switch components that establish an open hole in an open position, the multiple pole switch assembly further comprises means for providing predetermined vision access to the open gap and means for improving the visibility of open gap including the color of the generally flat support sheets and the color of the electrical switch components. 33. An assembly of the pole unit for a medium voltage switch, characterized in that it comprises electrical components, at least two generally flat, spaced support members and means for supporting the intermediate electrical components to the generally flat support members, separate.- 34. The pole unit assembly according to claim 33, characterized in that the pole unit assembly has a general rectangular, totally rectangular shape, and also comprises means for mounting the pole unit eneamble with a re-appearance At a flat surface, the mounting means are located along one edge of the pole unit assembly. 35. The pole unit earring according to claim 33, characterized in that the electrical components of the pole unit assembly comprise a multiple pole switch having two or more operating positions and collector connection means for each pole of the pole unit. Multiple poloe switch. 36. The pole unit assembly according to claim 33, further characterized in that it comprises an operating mechanism for operating the electric circuits, such electrical components of the pole unit assembly comprising a multi-pole switch, having two or more operating positions, the operating mechanism includes means for operating the i-Oe multi-pole breaker between two or more operating positions. 37. The pole unit assembly according to claim 33, further characterized in that it comprises means for improving the visibility of the electrical components, including the color of the electrical components and the color of the generally flat support members. 38. A screen arrangement for indicating the energized / de-energized state of at least one electrical circuit point, characterized in that it comprises: indicating means having an input that responds to an indicator input signal to receive a repreeentation of the energized state / de-energized from at least one electrical circuit point; test drive means that respond to a predetermined test input to start the test of the indicator means; and test half-test means that re-evaluate the test drive means to receive a predetermined representation corresponding to a test symbol. 39. The screen layout according to claim 38, characterized in that the test drive means comprises means responsive to 1 = predetermined test input to provide the indicator input signal. 40. The screen layout according to claim 39, characterized in that it also comprises path means of. perception connected to the entrance of the means indicators, such test drive means comprise means for providing an indicator input signal on the perception path means. 41. The screen arrangement according to claim 39, characterized in that the test drive means further comprises means for generating electrical power. 42. The screen arrangement according to claim 38, characterized in that the test drive means comprises means responsive to the light energy at a first predetermined location and the blocking of the light energy at a second predetermined location. 43. The screen arrangement according to claim 38, further characterized in that it comprises means for representing an electrical circuit associated with the indicating means, said indicating means are disposed within the means of representation. 44. The screen arrangement according to claim 38, characterized in that the test drive means comprises means for generating a signal that is generally a square wave. 45. The screen arrangement according to claim 38, characterized in that it also comprises perception means for providing a perception output at the entrance of the indicating means. 46. The screen arrangement according to claim 45, characterized in that the test drive means comprises test drive means connected to the sensing means. 47. The screen arrangement according to claim 38, characterized in that the indicating means includes a plurality of indicators for displaying the state of a respective plurality of electrical circuit points. 48. The screen arrangement according to claim 38, characterized in that it also includes voltage sensor means for providing the indicator input signal.