CN103430254B - There is the arc-resistant dry type transformer enclosure of fault electric arc damper device - Google Patents

Abstract

Resistance to arc envelope for dry-type transformer.More specifically, there is the transformer case of one or more resistance to arc characteristic, including arc channel, fault electric arc antivibrator and fault electric arc plenum chamber, and for the method providing it.

Description

There is the arc-resistant dry type transformer enclosure of fault electric arc damper device

Technical field

The application relates to the resistance to arc envelope of dry-type transformer, and more specifically, relates to having one or more The transformer case of resistance to arc characteristic, resistance to arc characteristic includes arc channel, fault electric arc antivibrator and fault electric arc inflation Room.The application further relates to a kind of method for providing the resistance to arc envelope for dry-type transformer.

Background technology

Dry-type distribution transformer and wattage transformer are known in the art, and include the core being familiar with and around assembling Put.Protect it from environmental effect for protection assembly and the personnel that limit are exposed to equipment and other purposes, generally by dry type Distribution transformer is encapsulated in metal shell.Arc dodges event can be during normal work, system transient modelling or the maintenance period exists Occur on this type of electrical equipment.When electric arc occurs portion in the enclosure, its pressure causing enclosure and gas temperature aobvious Write and rise.This air pressure and flying up of temperature cause high-temperature gas to escape the risk of shell in uncontrollable mode, accordingly Ground causes serious risk to neighbouring personnel.It is desirable to by this kind of risk minimization.Specifically, it is desirable to prevent or minimize height Temperature arcing gas escapes into from ground level to distance ground level 2m (79 inches) is highly around in the region of shell, i.e. If having personnel Under Repair or the canonical measure approximate region in the region that will occupy of personnel of average height during operation equipment.

Summary of the invention

Multiple embodiments for the resistance to arc envelope for (multiple) dry-type transformer described herein.Specifically, exist In one embodiment, the resistance to arc envelope being used for encapsulating (multiple) dry-type transformer includes being anchored on the formation envelope of at least three wall Close pedestal and the roof construction in space.One of them of described wall is antetheca, including the first and second corner fittings, limits the first access port The first surface frame and layout close to the first and second corner fittings are used for covering the first cover plate of the first access port.At least one leads to Air holes is cut in described top or wall.Described antetheca comprises at least one longitudinal seam covered by arc channel, wherein said Arc channel is attached in the following manner, and when arc event occurs, arcing gas is substantially prevented from through described capped Longitudinal seam effusion shell.In at least one embodiment, fault electric arc plenum chamber is attached at least one vent described.

In another embodiment, the resistance to arc envelope for (multiple) dry-type transformer includes being anchored at least three wall shape Become base construction and the roof construction in the space closed.At least one wall comprises at least one air grid, and at least one leads to Air port is cut among top or wall.Fault electric arc damper device is attached to the vicinity of at least one air grid, but, it is provided that Fault electric arc damper device be attached to each be positioned at distance ground level 79 inches at or under air grid near.? Eventually, each fault electric arc damper device is arranged to when arc dodges event close, thus is essentially prevented from arc sudden strain of a muscle gas and wears Cross the effusion of at least one air grid.

For providing the method for aforementioned resistance to arc envelope also to provide at this.

Accompanying drawing explanation

In the accompanying drawings, it is illustrated that the embodiment in structure, describe together with detailed description provided below for dry type change The metal shell of resistance to electric arc of depressor or the exemplary embodiment of its assembly.Those skilled in the art will appreciate that an assembly can To be configured to multiple assembly, or multiple assembly can be configured to single component.

Further, in the description of the following drawings sum, run through the accompanying drawing parts similar with in word description respectively with identical Reference represent.Figure is not necessarily to scale, and the ratio of some parts has been exaggerated for the facility illustrated.

Figure 1A is grade axis side view, the wherein side of the transformer case of the encapsulation three phase dry type distributing transformer of prior art Wall is removed.

Figure 1B is the axis side view such as grade of exemplary arc-resistant dry type transformer enclosure, and wherein electric arc plenum chamber is removed.

Fig. 1 C is the phantom of the shell of Figure 1B, it is shown that base construction, antetheca and the first side wall.

Fig. 2 A is the axis side view such as grade of the inner surface of exemplary arc channel, without cover member.

Fig. 2 B is the elevational view of the longitudinal axis of the arc channel along Fig. 2 A, with cover member.

Fig. 3 A be Figure 1B dotted line 2 in shown in isometry side-looking, decomposition and the enlarged drawing of part.

Fig. 3 B is the shell 100 sectional view along the line 3-3 ' on Figure 1B.

Fig. 3 C is the shell 100 sectional view along the line 4-4 ' on Figure 1B.

Fig. 3 D is the shell 100 sectional view along the line 5-5 ' on Figure 1B.

Fig. 3 E is the shell 100 sectional view along the line 6-6 ' on Figure 1B.

Fig. 3 F is the shell 100 sectional view along the line 7-7 ' on Figure 1B.

Fig. 4 A and 4B be respectively example faults electric arc damper device in the past and from after isometry exploded side figure.

Fig. 5 A be Figure 1B dotted line 8 in shown in the axis side view such as amplification of part.

Fig. 5 B is the axis side view such as grade in terms of the rear portion of the exemplary electrical arc damper device closed configuration.

Fig. 6 A be Figure 1B dotted line 8 in shown in the axis side view such as amplification of part.

Fig. 6 B is the axis side view such as grade in terms of the rear portion of the exemplary electrical arc damper device opened configuration.

Fig. 7 A is the axis side view such as grade of example faults electric arc plenum chamber, from top and the view in terms of rear portion.

Fig. 7 B is the axis side view such as grade of the fault electric arc plenum chamber shown in Fig. 7 A, from bottom and the view in terms of rear portion.

Fig. 7 C is the axis side view such as grade of the flanged pin square piece for building the fault electric arc plenum chamber segmentation in Fig. 7 D.

Fig. 7 D is the axis side view such as grade of the fault electric arc plenum chamber segmentation for building the fault electric arc plenum chamber in Fig. 7 A.

Fig. 8 A and 8B is the exemplary resistance to electric arc dry type transformation of the Figure 1B of the fault electric arc plenum chamber including being attached with Fig. 7 A The axis side view such as grade of the front and rear of device shell.

Detailed description of the invention

Shell disclosed herein and principle are applicable to the dry-type transformer of various sizes and rated value.Suitable is used for The limiting examples of this dry-type transformer includes electric power or the distribution dry type transformation that rated power is 112.5kVA to 25MVA Device.The limiting examples of suitable commercially available dry-type transformer includes vacuum pressing and casting coil,With The open winding transformator provided by ABB Inc..

Figure 1A illustrates the three phase dry type distributing transformer 10 being typically packaged in shell 20.For the ease of reference, below Dry-type transformer will be referred to transformator.

With reference to Figure 1B and 1C, it show transformer case 100 according to an embodiment of the invention.Shell 100 includes Base construction 110, wall 120 and roof construction 150.Base construction 110 can include outside being supported on by transformator (not shown) Device in shell, such as support 115.Wall 120 is anchored on base construction 110, typically, is positioned at the bottom of wall 120.Wall 120 is excellent Choosing is substantially perpendicular to the end, base construction 110, such as angle are about 90 ° between such as 80 °-100 °.It will be appreciated that at it In his embodiment, wall 120 and base construction 110 can form the angle being substantially different from 90 °, such as 30 °, 45 °, 60 °, 120 °, 135 °, 150 ° and any various angles therebetween.Wall 120 fastens preferably about the circumference of base construction 110.Can replace Changing, wall 120 is anchored on any point of base construction 110.

Although Figure 1B and 1C illustrates rectangle shell, it is to be appreciated that shell wall 120 can form any various geometry Shape, such as polygon, i.e. triangle, square, pentagon etc., or can be circle, olive shape, ellipse etc..It addition, Any number of wall 120 can be used.

Roof construction 150 is anchored on the top of wall 120 and can include one or more the most smooth, the plate of rigidity.Top Structure 150 can include the vent of the inner ventilation of one or more permission shell, or hole 155.In one embodiment, top Structure 150 includes three flanged pins and the top board 150a-c interlocked, and each top board comprises vent 155a-at its center c.Will be understood that, although smooth shown in Figure 1B and 1C, the roof construction 150 of multiple plates, in other embodiments, roof construction 150 can be made up of the plate with any suitable geometry of any suitable number.Such as, in one embodiment, top knot Structure 150 includes single comprising the smooth of single vent, the plate of rigidity.It is described more fully below in electric arc plenum chamber sight Roof construction and vent.

Use any materials of the functional requirement that generally can provide user to form shell 100, these functional requirements Including resistance to arc fault.In one embodiment, thick size slab is used to form shell 100；In another embodiment, thickness is used Size aluminum or rustless steel form shell 100.Shell 100 can meet National Electrical and manufacture association (NEMA) 250 standard.

With continued reference to Figure 1B and 1C, in an illustrated embodiment, rectangle shell 100 has antetheca 120a, the first side wall 120b, rear wall 120c (not shown) and the second sidewall 120d (not shown).In this embodiment, antetheca and rear wall are similarly configured, And the first and second sidewalls are similarly configured.So, the most only using antetheca 120a and the first side wall 120b as reference.Can manage Solving, in other embodiments, wall can have different configurations.

In the illustrated embodiment, antetheca 120a is made up of rigidity surface frame 125, and rigidity surface frame 125 self is same by two Surface frame 126 and 127 composition, by coplanar and adjacent in the way of arrange.Surface frame 126 has the first and second longitudinal edges, and this is years old One and second longitudinal edge carrying from surface frame 126 towards interior and be perpendicular to that the face of surface frame 126 extends first and second longitudinally Flange 128 and 129.Similar, the second surface frame 127 has the first and second longitudinal edges, and this first and second longitudinal edge holds Carry from surface frame 127 towards interior and be perpendicular to first and second longitudinal flanges 130 and 131 that the face of surface frame 127 extends.The most convex Edge 129 and 130 is bolted or other mechanical attachment, forms the 4th longitudinal seam 170d, thus provides rigidity surface frame 125.It will be appreciated that rigidity surface frame 125 can also be made up of single surface frame, thus eliminate the need to longitudinal flange 129 and 130 Want.

First and second surface frame 126 and 127 each comprise the first and second access port 132a, b, described first and second Access port 132a, b limit the major part in region, surface frame surface and provide contact shell 100 internal.Access port 132a passes through one Fixed in longitudinal lateral spacing of access port to the passage 133a, b of general U-shape, this U extends along the length of access port；Similar , access port 132b is fixed in longitudinal lateral spacing of access port by the passage 133c, d of a pair general U-shape, and this U is along this The length of access port extends.The 26S Proteasome Structure and Function of passage 133 is described in detail below with reference to Fig. 3 A.

It is made up of the first and second corner fittings 134,136 with continued reference to Figure 1B and 1C, antetheca 120a.Corner fittings 134,136 is firm Property, single plate, to form Part I 134a, the mode of 136a and Part II 134b, 136b bends or knuckle.By first With the geometry that the angle of Part II restriction depends on shell 100.In an illustrated embodiment, angle is 90 °.First Divide 134a, 136a generally coplanar with surface frame 125 and form a part of antetheca 120a, and Part II 134b, 136b are formed A part of sidewall 120b, d is the most coplanar with the remaining assembly of these walls described below.

Corner fittings 134 is adjacent with the first surface frame 126, and the longitudinal edge close to surface frame 126 of corner fittings 134 carries flange 135, flange 135 is towards interior and be perpendicular to the face of antetheca 120a.Similar, corner fittings 136 is adjacent with the second surface frame 127, and angle The longitudinal edge close to surface frame 127 of part 136 carries flange 137, and flange 137 is towards interior and be perpendicular to the face of antetheca 120a.? During assembling, flange 135 is bolted or other are mechanically attached to the first flange 128 of surface frame 126, forms first and longitudinally connects Seam 170a.Similar, when assembling, the flange 137 of corner fittings 136 is mechanically attached to the second flange 131 of surface frame 127, forms the Seven longitudinal seam 170g.

Antetheca 120a can also include one or more rigidity cover plate 140.In an illustrated embodiment, antetheca 120a includes First and second rigidity cover plate 140a, b, configure and arrange the access port 132 for covering surface frame 125.Cover plate 140 is by arbitrarily Suitable device for mechanical is attached to surface frame 125.In one embodiment, cover plate 140 be configured so that longitudinally in each side with With the close-fitting mode of U 133 of surface frame 126,127 with flange, and in the following manner along its length by with Bolt is fixed to surface frame 125.

Antetheca 120a can also include the one or more air grids 180 allowing gas turnover enclosure.Shown Embodiment in, each of cover plate 140 comprises two air grids 180.In other non-limiting examples, this or Multiple air grids are positioned at one or more different position, such as sidewall 120b, d and/or rear wall 120c.

Sidewall 120b includes one or more rigid sidewalls plate 145.In an illustrated embodiment, sidewall 120b includes two Same sidewall paneling, these two same sidewall panelings are separated by elongate side wall support member 146, and are attached to elongate side wall support member 146.It addition, sidewall 120b includes the Part II 136b of corner fittings 136, and the similar Part II of the corner fittings 138 of correspondence.

Arc channel

With continued reference to Figure 1B and 1C, it is shown that arc channel 160 according to an embodiment of the invention.Generally, electric arc Passage 160 for being respectively provided with the elongated flat metalwork of the first and second ends 161,162,161,162, this first and second end On shell subaerial first and the horizontal 2m that is above the ground level (79 inches) on second point.Arc channel 160 exists It is positioned at any longitudinal seam of optional position from ground level to distance ground level 2m (79 inches) or the most longitudinal A part of place of seam is attached to the outer surface of wall 120, and term longitudinal seam is thus located to limit.Term " seam " and " joint " In the most interchangeable use, and it is adjacent to refer to wallboard, frame or support member adjacent by two on the outer surface of wall 120 Connecing or the overlapping any longitudinal seam caused, described longitudinal seam likely discharges the expansion gas caused by arc fault event Body, and thus described longitudinal seam directly brings harm or by that it(?) can fuel wood near lighting likely to onlooker near any Material brings harm indirectly.

Arc channel 160 act as accommodating the gas of the rapid expanding caused by enclosure arc fault event, or Guide expanding gas to the point (point of 79 inches on the level that is such as above the ground level) unlikely bringing harm.With reference to Fig. 2 A and 2B, in one embodiment, arc channel 160 has the elongate portion 163 of central planar and two sidepieces 164.Sidepiece 164 passes through With about 90 ° of each sides of knuckle twice, form turnup 164a and the flanged pin portion 164b almost parallel with central part 163. Preferably, two ends 161 and 162 of arc channel 160 are substantially closed or capped, by such as by tiny smooth gold Belong to cover member 165 and be soldered to either end so that the transverse cross-sectional area between each turnup 164a is the most capped, as Shown in Fig. 2 B.Each arc channel 160 is attached to the outer surface of shell wall 120, so that flange part 164b adjoins outer surface, Thus form the space (not shown) of the closing between the outer surface of shell wall 120 and the inner surface of smooth elongate portion 163.

Fig. 3 A is decomposition and the zoomed-in view of part shown in the dotted line 2 in Figure 1B, it is shown that the epimere of arc channel 160b, cover A part of plate 140a, and a part for surface frame 126,127, surface frame 126,127 is respectively by longitudinal flange 129,130 machinery Adhere to and comprise U 133b and 133c.When mounted, cover plate 140a will be directed to contact with surface frame 126, thus cover plate First longitudinal side with the flange being perpendicular to its surface be fixed in the first U 133a (not shown) of surface frame 126, And second longitudinal side again with the flange being perpendicular to its surface of cover plate is fixed in the second U 133b.Equally , although not shown in Fig. 3 A, cover plate 140b is directed to contact with surface frame 127, thus cover plate with being perpendicular to its surface First longitudinal side of flange is fixed in the first U 133c of surface frame 127, and cover plate with being perpendicular to its surface The longitudinal side of the second of flange is fixed in the second U 133d.

With continued reference to Fig. 3 A, it show an exemplary electric arc channel bolts and arrange.In this embodiment, two groups of friendships are used The bolt replaced, is bolted to surface frame 126 by arc channel 160b and cover plate 140a.First group of bolt 300 is along leaning on The line of one longitudinal edge of nearly arc channel 160b is through arc channel 160b.Thereafter, bolt 300 through cover plate 140a and The clamp device of the such as clamp nut (not shown) being screwed in surface frame 126.Second group of bolt 300 starts from arc channel 160b Portion (i.e. the head of bolt 310 is in the closing space between the flat elongate portion 163 and cover plate 140 of arc channel 160), wears Cross cover plate 140a, and the clamp device of the such as clamp nut (not shown) being screwed in surface frame 126.Same, along close The relative longitudinal edge of arc channel 160b utilizes this bolt to arrange so that arc channel 160b and cover plate 140b are attached to face Frame 127.By this way, arc channel 160b covers the three, the 4th and the 5th longitudinal seam 170c, d, e, in more detail below Describe.

Fig. 3 B is the shell 100 sectional view along the line 3-3 ' of Figure 1B, it is shown that the horizontal stroke after the part assembling of antetheca 120a Cross section, and the concrete part of corner fittings 134a, arc channel 160a, surface frame 126 and cover plate 140a.As indicated, first longitudinally connects Seam 170a is formed by adjacent corner fittings 134 and the respective flange part of surface frame 126 135,128.Same, the second longitudinal seam 170b Formed by the superposed part of cover plate 140a and surface frame 126.First group of bolt 320 is indulged near the first of arc channel 160a To edge, arc channel 160a is bolted to corner fittings 134；Second and the 3rd alternate group bolt 300,310, electric arc is led to Second longitudinal edge of road 160b is bolted to cover plate 140a and surface frame 126.By this way, arc channel 160a covers First and second seams 170a, b.

Fig. 3 C is the shell 100 sectional view along the line 4-4 ' of Figure 1B, it is shown that the horizontal stroke after the part assembling of antetheca 120a Cross section, and arc channel 160b, cover plate 140 and the concrete part of surface frame 126,127.As indicated, the 3rd and the 5th longitudinally connects Seam 170c, e are formed, as mentioned above by the part that cover plate 140 and surface frame 126,127 are the most superposed.Similar, the 4th longitudinally Seam 170c is by adjacent surface frame 126, and 127 respective flange parts 129,130 are formed, as mentioned above.Same as indicated, as above institute State use bolt 300,310 and arc channel 160b is fixed to cover plate 140a and surface frame 126, and cover plate 140b and surface frame 127, Thus cover the three, the 4th and the 5th longitudinal seam 170c, d, e.

Fig. 3 D is the shell 100 sectional view along the line 5-5 ' of Figure 1B, it is shown that antetheca 120a and a part of sidewall 120b Cross section after assembling, and cover plate 140b, surface frame 127, arc channel 160c, corner fittings 136, arc channel 160d and sidewall paneling The concrete part of 145a.As indicated, the 6th seam 170f is formed by the superposed part of cover plate 140b and surface frame 127.The Seven seams 170g are formed by adjacent surface frame 127 and the respective flange part of corner fittings 136a 131,137.First and second alternate group spiral shells Bolt 300,310 is near the first longitudinal edge of arc channel 160c, in the above described manner with bolt by the first of arc channel 160c Longitudinal edge is fixed to cover plate 140b and surface frame 127.Same, the 3rd group of bolt 320 is indulged near the second of arc channel 160c To edge, with bolt, the second longitudinal edge of arc channel 160c is fixed to corner fittings 136a.By this way, arc channel 160c covers the 6th and the 7th seam 170f, g.

With continued reference to Fig. 3 D, the 8th longitudinal seam 170h is by part shape superposed for sidewall paneling 145a and corner fittings 136b Become.First group of bolt 330 is near the first longitudinal edge of arc channel 160d, with bolt by the first of arc channel 160d longitudinally Edge is fixed to corner fittings 136b.Second and the 3rd alternate group bolt 340 and 350 near the second longitudinal edge of arc channel 160d Edge, is fixed to sidewall paneling 145a and corner fittings 136b with bolt by the second longitudinal edge of arc channel 160d.By this way, electricity Arc passage 160d covers the 8th seam 170h.

Fig. 3 E is the shell 100 sectional view along the line 6-6 ' of Figure 1B, it is shown that the horizontal stroke after the part assembling of sidewall 120b Cross section, and sidewall paneling 145a, the concrete part of b, side wall supports 146 and arc channel 160e.As indicated, the 9th seam and Tenth seam 170i, j are formed by the part that sidewall paneling 145a, b and side wall supports 146 are the most superposed.First and second The two of arc channel 160e, near two longitudinal edges of arc channel 160e, are indulged by alternate group bolt 340,350 with bolt Sidewall paneling 145 and side wall supports 146 it is fixed to edge.By this way, arc channel 160e covering the 9th and the tenth connects Seam 170i, j.

Fig. 3 F is the shell 100 sectional view along the line 7-7 ' of Figure 1B, it is shown that the horizontal stroke after the part assembling of sidewall 120b Cross section, and the concrete part of sidewall paneling 145b, arc channel 160f and corner fittings 138.As indicated, the 11st seam 170k is by side Wallboard 145b and the superposed part of corner fittings 138 are formed.First and second alternate group bolts 340,350 are near arc channel First longitudinal edge of 160f, is fixed to sidewall paneling 145b and corner fittings with bolt by the first longitudinal edge of arc channel 160f 138.3rd group of bolt 330, near the second longitudinal edge of arc channel 160f, is indulged the second of arc channel 160f with bolt Corner fittings 138 it is fixed to edge.By this way, arc channel 160f covers the 11st seam 170k.

Above-described arc channel 160a-f covers longitudinal seam 170a-k, thus prevents or minimize and dodged event by arc Cause high-temperature gas effusion around shell 100 in height 2m (79 inches) area below.By this way, any attached Near personnel are all protected against being exposed to such high-temperature gas together with any combustible material.It is appreciated that and is described herein as Arc channel be only one embodiment of the present of invention, for the different configurations of other arc channel embodiments, geometry and Attachment arrangement is anticipated herein and can be realized above-mentioned function.Same, according to concrete enclosure implementations, different seams is several What shape and layout may reside in different enclosure implementations.

Fault electric arc damper device

Embodiments of the invention can also include one or more fault electric arc damper device.Generally, fault electric arc Damper device is to be positioned at above-mentioned air grid the damper device being coupled with air grid.According to described herein Bright, at any distance ground level 2m (79 inches) place being present in the transformer case of resistance to electric arc or position below ventilation grate Lattice must have the fault electric arc damper device being coupled with it.

With reference to Fig. 4 A and 4B, it is shown that fault electric arc damper device 400 according to an embodiment of the invention.Damping Device device 400 includes any suitable damping sheet 405 made in the material preventing high-temperature electric arc gas from escaping from shell, and Damping sheet is shaped to associated therewith air grid is completely covered.In one embodiment, damping sheet 405 is formed from steel also And be rectangle, the region of 180 overlay areas of air grid it is more than with area.Damping handle 410 attaches to damping sheet 405 Front surface (illustrates) in Figure 4 A, and is disposed through the suitable opening of air grid 180 and highlights.

In one embodiment, the top edge carrying flange 415 of damping sheet 405, this flange 415 is towards damping sheet 405 The side of rear surface (illustrating in figure 4b) upwardly extend, and be perpendicular to table plane.Same, the both sides of the edge of damping sheet 405 Carrying first and second side flange 420a, b, this first and second side flange 420a, b are in the rear surface towards damping sheet 405 Side upwardly extend and be perpendicular to table plane.Each of side flange 420 includes through hole 441 and bolt channels 451, the most in detail Thin description.

One or more hinges are attached to damping sheet so that the rotatable interior table that damping sheet is attached to shell 100 Face.In one embodiment, elongated hinge 425 is attached to push up flange 415.

Fault electric arc damper device 400 includes one or more support.In one embodiment, the first and second support 430a, b include flanged pin part and major part, this flanged pin part substantially with the surface co-planar of damping sheet 405, this is main Part extends back from flanged pin part and is substantially perpendicular to flanged pin part.It is recessed that major part includes that at least one has The wheel bearer path 431 of mouth 432, and at least one cut-out portion 433, described in detail below above-mentioned all.

With continued reference to 4A and 4B, the top of support 430 is rotatable is attached to damping sheet in the following manner by bolt 435 405.Bolt 435 is through the external springs keeper 440 of knuckle, cut-out portion 433, through hole 441 and thereafter passes through contained spring Keeper 442 extends, and is fastened by lock washer 491 and nut 436, and nut 436 adheres to for screw thread.As indicated, flat pad Circle 490 is included in position.Cut-out portion 433 is arranged at the top of support 430 provide for bolt 435 Be suitable for through hole.In an illustrated embodiment, cut-out portion 433 includes that relatively large top is to accommodate bolt 435, opposite, narrow Cervical region, it has width less than the diameter (thus preventing bolt 435 from moving away) of bolt 435, and relatively large bottom, It is for reducing the weight of support 430 and allowing when damping sheet 405 is opened to increase to ventilate.

The bottom of support 430 is slidably attached to damping sheet 405 by bolt 445 in the following manner.Bolt 445 passes The external springs keeper 450 of knuckle, bearing wheels 455, bearer path 431, bolt channels 451 and thereafter pass through internal bullet Spring keeper 452 extends, and is fastened by lock washer 492 and nut 446, and described nut is thread attachment.As indicated, it is flat Smooth packing ring 490 is included in appropriate position.

External springs 460 is attached to external springs keeper 440 at end, and is attached to outside at the second end Spring retainer 450.Similar, contained spring 465 is attached to contained spring keeper 442 at end, and second Contained spring keeper 452 it is attached at end.Bearing wheels 455 is suitable in bearer path 431.

Engage additional reference Fig. 5 A, 5B, 6A and 6B and describe the work of fault electric arc damper device 400.Fig. 5 B is event Hinder after electric arc damper device 400 assembles and rearview in the closed position.Damper device 400 is with above description also The air grid 180 illustrated in fig. 5 aligns.Side stand 430 and hinge 425 are attached to the cover plate of shell 100 by bolt etc. 140a, so that antivibrator 405 is completely covered grid 180.Bolt pattern exemplary shown in Fig. 5 A and 5B, bolt pattern Including bolt hole 500a, b of side stand 430a, the b alignd with bolt hole 505a, b of cover plate 140a, and with cover plate 140a's The bolt hole 500c of the hinge 425 of bolt hole 505c alignment.

Fault electric arc damper device 400 is configured so that it is positioned at the position closed under normal circumstances, such as Fig. 5 A Shown in 5B.In the illustrated embodiment, the configuration closed under normal circumstances is by outwardly and inwardly spring 460,465, and knot Close the making for realizing of bearer path 431 of bearing wheels 455 and knuckle.In practice, outwardly and inwardly spring 460 and 465 The first end be respectively attached to outwardly and inwardly spring retainer 440,442, it is fixed by the most rotatable attachment of bolt 435 Position.Spring 460, second end of 465 is respectively attached to outwardly and inwardly spring retainer 450,452, its most rotatable peace It is contained in bearing wheels 455.Bearing wheels 455 is arranged in the bearer path 431 of knuckle, it is allowed to contractility is turned by spring 460,465 Become side force effectively antivibrator 405 is pulled to closed position.It will be appreciated that it is normal to realize to configure other configurations The antivibrator 405 of lower closedown, and besieged within it.In a non-limiting example, bearing wheels 455 is by carrying The steel pin slided in passage 431 is substituted.In another non-limiting example, torque spring is used for bolt 435 and sentences replacement Assembly discussed above.

In normal operating, operator is fixed in recess 432 by damping handle 410 is pushed into bearing wheels 455, will damping Device 405 is set to open position (as shown in Figure 6 A and 6B).Once fixing, antivibrator 405 will stay open and thus allow The ventilation of shell 100 occurs.But, when arc event, the vibratory forces of the gas of rapid expanding makes bearing wheels 455 dislocate, and draws Play antivibrator 405 to move to closed position, thus prevent high-temperature gas from passing through air grid 180 and escape in a large number from shell 100.

Fault electric arc plenum chamber

Embodiments of the invention can also include one or more fault electric arc plenum chamber.Generally, fault electric arc inflation Room is casing device, and the fault electric arc gas of expansion is guided to fault electricity by this casing device from the transformer case of resistance to electric arc Arc gas can be by the position of safe release.

With reference to Fig. 7 A-7D, it is shown that fault electric arc plenum chamber according to an embodiment of the invention.Generally, fault electricity Arc plenum chamber 700 can be formed by any material structure being applicable to accommodate fault electric arc gas.A non-limiting enforcement In example, fault electric arc plenum chamber is formed by thin-sheet metal structure.

Fault electric arc plenum chamber 700 can be configured to the segmentation 710 of any suitable shape or length, and spiral shell is passed through in segmentation 710 The mechanical attachment such as bolt.In one non-limiting embodiment, each segmentation 710 is cube and by same square piece 720 Composition, square piece 720 every side in a direction perpendicular to its surface has flange.Each segmentation 710 is by by side part 730 First flange be attached to the side's of top part 740 near two opposite edges first surface (surface do not intersected with flange) and Formed.Similar, second flange (i.e. relative with the first flange) of side part 730 be attached to end side's part 750 near two The first surface of opposite edges and formed.Thereafter, each segmentation 710 is attached to another segmentation 710 to reach fault by flange Electric arc plenum chamber 700, side's part 750 at the bottom of subsidiary is not attached to one or more continuous print segmentation 710, thus provides opening empty Between 760.

With reference to Fig. 8 A and 8B, it is shown that have the resistance to arc envelope 100 of the fault electric arc plenum chamber 700 of attachment.Shown In embodiment, fault electric arc plenum chamber 700 is bolted to roof construction 150 so that open space 760 and vent 155 Alignment, as shown in figs. ib and 1 c, so that the fault electric arc gas expanded can be inflated by vent 155 and fault electric arc The inside of shell 100 is left in room 700.In one non-limiting embodiment, fault electric arc plenum chamber 700 is connected to pipeline system System, this tubing terminates at the home outside electric panel room and/or building package casing 100.

It should be understood that other fault electric arc plenum chambers and vent configure within the scope of the present invention.Such as one In individual non-limiting example, roof construction 150 includes the single plate with single vent, and single fault electric arc plenum chamber is attached To vent.In another non-limiting example, vent 155 is provided on one or more shell wall 120 above Ground In place of face 2m (79 inches), and one or more fault electric arc plenum chamber attaches to shell wall 120.

For the content that " comprises " of term used in description or claims, it is intended to " include " being similar to term Mode, be interpreted inclusive as link word when term uses in the claims.It addition, for using term The content of "or", it is intended to represent " A or B or both ".When applicant is intended to refer to " only A or B and not both ", it will Use term " only A or B and not both ".Therefore, using of term "or" is inclusive herein, is not making of removing property With.See Bryan A.Garner, Modern Law term dictionary (A dictionary of Modern Legal Usage) 624 (2d.Ed.1995).Same, for used in description or claims term " in " or the content of " interior ", it is intended that Extra expression " on " or " on ".Further, the term used in description or claims " is connected ", not only It is intended to indicate " being connected directly to ", is also represented by such as connecting " be indirectly connected with by another assembly or other multiple assembly To ".

Although present invention illustrates various embodiment and in considerable detail these embodiments that describes, but applicant Be not intended to the scope of the appended claims be limited to by any way these details.Those skilled in the art will hold It is readily conceivable that extra advantage and amendment.Therefore, the present invention is in the scope that it is wider, however it is not limited to shown and described Detail, representative embodiment, and illustrative examples.Therefore, it is possible to without departing from applicant's general inventive concept spirit or Scope and make change from these details.

Claims (10)

1. for a resistance to arc envelope for dry-type transformer, including:

Base construction；

Dry-type transformer, is fixed on described base construction；

At least three wall, forms the space for encapsulating described transformator, and at least one wall in described at least three wall includes Limit at least one surface frame of access port；

At least one cover plate, is removably attachable at least one surface frame described, and at least one cover plate described has at least one Air grid；

Fault electric arc damper device be attached to be positioned at distance ground level 79 inch height or following described at least one The vicinity of each air grid of air grid, and

The most each fault electric arc damper device is arranged to when arc dodges event close, thus is essentially prevented from arc and dodges gas Body is escaped by neighbouring at least one air grid described.

Resistance to arc envelope the most according to claim 1, wherein said at least three wall be fixed to described base construction and Including antetheca, two sidewalls and rear wall, wherein said antetheca includes the first and second corner fittings, and the most wherein said extremely A few surface frame includes that the first surface frame and the second surface frame, described first surface frame limit the first access port, and described second surface frame Limiting the second access port, wherein said first surface frame is near described first corner fittings, and described second surface frame is near described first Surface frame and described second corner fittings, and at least one cover plate the most wherein said includes that being sized to cover described first connects First cover plate of entrance, and it is sized to cover the second cover plate of described second access port, and wherein said first He Each at least one air grid that comprises of second cover plate, and wherein fault electric arc damper device is neighbouring is attached to institute State each air grid at least one air grid described of the first and second cover plates.

Resistance to arc envelope the most according to claim 1, farther includes to be connected to the event of at least one air grid described Barrier electric arc plenum chamber.

Resistance to arc envelope the most according to claim 2, farther includes to be connected to the event of at least one air grid described Barrier electric arc plenum chamber.

Resistance to arc envelope the most according to claim 3, farther includes to be fixed to the roof construction of described at least three wall, and And described roof construction includes at least one vent.

Resistance to arc envelope the most according to claim 4, farther includes to be fixed to the roof construction of described at least three wall, and And described roof construction includes at least one vent.

Resistance to arc envelope the most according to claim 5, wherein said roof construction comprises three vents, and fault electric arc Plenum chamber is attached to each air grid.

Resistance to arc envelope the most according to claim 6, wherein said roof construction comprises three vents, and fault electric arc Plenum chamber is attached to each air grid.

Resistance to arc envelope the most according to claim 7, the most each fault electric arc plenum chamber includes at least three flanged pin Segmentation.

Resistance to arc envelope the most according to claim 8, the most each fault electric arc plenum chamber includes at least three flanged pin Segmentation.