CN206640195U - One kind is without isolated switchgear under bin static contact non-SF 6 gas insulative - Google Patents

Abstract

The utility model discloses one kind without isolated switchgear under bin static contact non-SF 6 gas insulative, belong to medium voltage switchgear equipment field.It is poor for non-SF6 gas switchgears arc quenching effect present in prior art, insulating properties is not strong, the problem of security is weak, the utility model provides one kind without isolated switchgear under bin static contact non-SF 6 gas insulative, including air chamber, mechanism chamber, control room, cable vault and pressure releasing chamber, mother device room, air chamber includes the mother device being sequentially connected, breaker, three-station, bus, outlet casing tube and gas tank, three-station, breaker, bus is arranged in closed gas tank, mother device, outlet casing tube is arranged on gas tank housing, non- SF6 insulating gas is filled with gas tank, described breaker is solid-sealing vacuum arc extinguishing breaker.The switchgear of this programme is non-maintaining, and effectively prevents destruction of the severe environmental conditions to insulating properties, and guarantee switchgear is normal, safe operation.

Description

One kind is without isolated switchgear under bin static contact non-SF 6 gas insulative

Technical field

Medium voltage switchgear equipment field is the utility model is related to, more specifically to one kind without the non-SF6 gas of bin static contact The lower isolated switchgear of body insulation.

Background technology

Existing medium voltage switchgear equipment mainly uses air insulation or SF6 gas-insulateds, air insulated switch equipment due to Its dielectric is air, is easily influenceed (such as salt, humidity, pernicious gas, High aititude, dust by switchgear surrounding environment Deng), cause insulation breakdown, accident occurs for switchgear.

In order to exclude the influence of environment switching devices, there are a kind of SF6 gas-insulated switchgears (such as C-GIS), By high-voltage live parts and switch be arranged on one made of metal, it is closed, can bear in the gas tank of certain pressure, then to gas SF6 insulating gas is filled with case；But SF6 gases can be decomposed into toxic gas by arcing and be fuel factor gas, its thermal effect It should be 22800 times of CO2, the gas of limiting emission is classified as by the Kyoto Protocol.

Also occur the switching system of non-SF6 gases, Chinese patent application, application number in existing design 201510520667.9, publication date on November 18th, 2015, disclose a kind of on-load switch suitable for environmentally friendly gas-insulated type Ring main unit, including ring main unit body, ring main unit body are divided into operating room, on-load switch room, cable vault and discouraged room；On-load switch Interior is provided with three-stations load switch, the rotary shaft being connected with three-stations load switch, directly over three-stations load switch On-load switch connection row, and the contact rod immediately below three-stations load switch；Lose heart between room and on-load switch room Provided with explosion-proof valve；The inlet wire cable pillar being connected with contact rod is provided with cable vault, inlet wire cable pillar passes through contact rod and three Station load switch connects；The operating mechanism for being used for controlling three-stations load switch to rotate is provided with operating room；Operating mechanism leads to When crossing rotary shaft drive three-stations load switch rotation, three-stations load switch is grounded successively, is disconnected and is connected with on-load switch Row's connection.Its advantages of is simple in construction, safety, and switch closing and switch opening is convenient.

Chinese patent application, application number 201520677913.7, publication date on January 6th, 2016, a kind of environmentally friendly gaseous type are filled Gas ring main unit, breaker are fixed on the bottom of inwall on the right side of housing, and static contact is fixed on the top of inwall on the right side of housing, and ground connection is touched Head is fixed on the middle part of housing inner left wall, and the static side at the top of breaker is provided with bearing, and the bottom moved end of breaker passes through insulation Pull bar realizes and is connected with the operating mechanism outside housing that three-station is fixed on the top surface of bearing, dynamic on three-station Contact knife can be contacted with static contact and grounding contact respectively, and breaker is connected by transition conductor with outlet casing tube, and static contact passes through Conductor is connected with bus casing.This utility model overall structure novelty, good reliability, flexible arrangement, floor space are small, height mould Block, the characteristics of production cost is low.

Chinese patent application, application number 201520873137.8, publication date on March 9th, 2016, power switchgear technology Field, particularly a kind of environmentally friendly gas-insulated ring network cabinet.For the sulfur hexafluoride in existing sulfur hexafluoride gas-insulating ring main unit Destruction problem of the gas to environment, the utility model employ environmentally friendly gas such as dry air, nitrogen etc. and opened as insulating materials Environmental-protective gas-insulating ring main unit is sent out.The technical measures that the utility model mainly uses are：Breaker uses vacuum extinction skill Art, disconnecting switch use double break mouth structure, optimize electric-conductor Electric Field Distribution using technology of pressure equalization.Add observation window, humidity shows Show test paper etc., ensure the safety of operation maintenance personnel.The beneficial effect of this utility model is：Without sulfur hexafluoride gas (SF6), ring Protect, safety；A variety of compound inslation technologies are employed, improve the insulating capacity of ring main unit, compensate for environmentally friendly gas-insulated ability Deficiency.

But above-mentioned existing switching system, insulating gas are used not only for insulating, and for the function of arc extinguishing, but disliking Under bad environment, its arc quenching effect is poor, and influences whether insulating properties, to integral insulation switch cubicle poor effect.

The content of the invention

1. technical problems to be solved

For non-SF6 gas switchgears arc quenching effect present in prior art is poor, insulating properties is not strong, security is weak Problem, the invention provides one kind without isolated switchgear under bin static contact non-SF 6 gas insulative.It can realize switch cubicle Independent arc extinguishing, arc quenching effect is good, insulating properties is strong, security is good.

2. technical scheme

The purpose of this utility model is achieved through the following technical solutions.

One kind is without isolated switchgear under bin static contact non-SF 6 gas insulative, including air chamber, mechanism chamber, control room, electricity Cable room and pressure releasing chamber, mother device room can also be included, mother device room is arranged above air chamber or sidepiece or enclosed setting, Such a to set according to mother device installation requirement, the free degree is high, and mother device, breaker, three stations that air chamber includes being sequentially connected are opened Pass, bus, outlet casing tube and gas tank, three-station, breaker, bus are arranged in closed gas tank, mother device, lead collar Pipe is arranged on gas tank housing, and non-SF6 insulating gas is filled with gas tank, and the part connection that mother device is arranged on outside gas tank is other Switchgear or inlet wire cable, the part inside gas tank are connected with the static contact of three-station, and static contact is without bin Static contact, it is shaped as C-shaped configuration.

Further, described non-SF6 insulating gas is nitrogen, carbon dioxide, dry air or non-greenhouse effect The forming gas answered.

Further, described mother device is fixed sealing type mother device, mother device be arranged on gas tank top or sidepiece or Top, sidepiece are installed simultaneously.

Further, three-station is the rotary three position switch of three-phase synchronous disconnecting link formula, and three-station passes through Sealing flange and the three-position switch operation mechanism of mechanism chamber connect, three-position switch operation mechanism actuating three-station difference To connection position, isolated bit and ground connection position；It is connected after grounding contact three-phase short circuit with gas tank housing, static contact and breaker outgoing line end Connection, moving contact couple with bus.Grounding contact is arranged on a copper bar, copper bar and gas tank housing connect.Three-station Original anglec of rotation is 105 °, and the three-station of this programme uses the anglec of rotation as 90 ° of three-station, due to stationary contact Head is arranged to the C-shaped configuration of no bin, it is necessary to set angle initialization only to need to reach 90 °, avoids due to 105 ° not Operating mechanism caused by regular angular switched when being operated it is not in place or excessive, ensure that switch it is steady in switching action It is fixed, folding efficiency high.

Further, described breaker is solid-sealing vacuum arc extinguishing breaker, including a main shaft connection three-phase breaks Insulated tension pole on the device of road, main shaft are connected with sealing flange is crossed with the circuit breaker operation mechanism outside gas tank, circuit breaker operation mechanism Actuating three-phase breaker synchronously completes combined floodgate or separating brake；Breaker end of incoming cables is connected with bus device, leading-out terminal and three-station Static contact connection.

Further, described bus is naked copper formula, is naked copper rod, the leading-out terminal connection of bus one end and breaker, The other end is connected with outlet casing tube.

Further, described outlet casing tube is fixed sealing type；Part inside gas tank is connected with transfer bus, in gas Part outside case is connected with outlet cable.O-ring is provided with mother device and outlet casing tube, prevents insulating gas from leaking.

Further, described gas tank is welded by stainless steel plate.

Further, the pressure relief device I of anti-internal arcing is installed on described gas tank.

Further, described cable vault is provided with pressure relief device II.

Switchgear of the present invention is not influenceed on insulation by environment, is safe and reliable to operation and non-maintaining, without using SF6 gas Body, it is environmentally friendly.

3. beneficial effect

Compared to prior art, the utility model has the advantage of：

(1), the switchgear of this programme is not influenceed on insulation by environment, is safe and reliable to operation and non-maintaining, without using SF6 gases, environmentally friendly, the feature of environmental protection is strong；

(2), this programme remove using non-SF6 insulating gas (N2, CO2, dry air, non-greenhouse effects forming gas etc.) Outside instead of SF6 insulating gas, there is following distinguish with existing product：Non- SF6 gases are served only for insulation rather than arc extinguishing, All arc extinguishings of this programme are completed by vacuum interrupter, and breaker unit cabinet, the load switching unit cabinet at place pass through phase The vacuum interrupter answered carries out arc extinguishing, and arc extinction performance is good, and does not influence insulation effect；

(3), this programme has used integrated three-station, including connection position, isolated bit, ground connection position, switch arrangement to exist Bus bar side, it is few to ensure that switch produces electric arc；Cable grounding is common by three-station and breaker or vacuum load switch Realize, ensure that the safety of ground connection；Three-station incorporates the function of both disconnecting switch and earthed switch, and by one Knife is completed, and can thus realize mechanical latching, prevents major loop powered conjunction earthing knife-switch, and security is more preferable；

(4), breaker herein can be vacuum load switch, and breaker or vacuum load switch use pole, Pole meets the requirement of vacuum extinction outdoor insulation, and original gas isolated products of SF6 need to only use installing type pole, but If being non-SF6 gas-insulated ring networks cabinet using installing type pole, insulation and arc quenching effect are bad, and security substantially reduces, we The vacuum interrupter conductive pieces related to breaker are embedded into epoxy resin or thermoplastic by the pole of case simultaneously Pole is formed in this kind of solid insulating material easily solidified, whole circuit breaker polar is turned into the part of an entirety, Its modularized design, simple in construction, detachable part is few, and reliability is high；With high insulating bar ability, it is by surface insulation Become volume insulation, compared to air insulation, reduce the influence of environment, substantially increase dielectric strength；It can make breaker chi Very little diminution, be advantageous to switch cubicle miniaturization；

(5), to prevent the influence expanded with heat and contract with cold to vacuum interrupter of epoxy part, vacuum extinction chamber enclosure makees encapsulated place Reason；Ensure vacuum interrupter good insulation preformance at different temperatures, arc quenching effect is not influenceed by epoxy part, and arc quenching effect can Lean on；

(6), operating mechanism is three-station, breaker integrated mechanism, and two mechanism interlockings, connection is relatively reliable, Maloperation is avoided, is operated safer.

Brief description of the drawings

Fig. 1 is inside elevation view of the present utility model；

Fig. 2 is inner right side schematic diagram of the present utility model；

Fig. 3 is Section A-A schematic diagram of the present utility model；

Fig. 4 is bottom up F direction schematic diagrams of the present utility model.

Label declaration in figure：

1st, air chamber；11st, mother device；12nd, breaker；13rd, three-station；131st, static contact；132nd, grounding contact；133、 Moving contact；14th, bus；15th, outlet casing tube；16th, gas tank；161st, 162, sealing flange；163rd, pressure relief device I；2nd, mechanism chamber； 21st, circuit breaker operation mechanism；22nd, three-position switch operation mechanism；3rd, control room；31st, air gauge；4th, cable vault；41st, pressure release fills Put II；5th, pressure releasing chamber；6th, mother device room.

Embodiment

With reference to Figure of description and specific embodiment, the utility model is described in detail.

Embodiment 1

As Figure 1-4, one kind is without isolated switchgear under bin static contact non-SF 6 gas insulative, including air chamber 1, machine Structure room 2, control room 3, cable vault 4 and pressure releasing chamber 5, mother device room can also be included, mother device room is arranged above air chamber or side Portion or enclosed are set, and such a to set according to mother device installation requirement, the free degree is high, and air chamber 1 includes the mother being sequentially connected Device 11, breaker 12, three-station 13, bus 14, outlet casing tube 15 and gas tank 16, three-station 13, breaker 12, mother Line 14 is arranged in closed gas tank 16 so that switchgear is non-maintaining, and effectively prevents severe environmental conditions to insulating properties Destruction, ensure that switchgear is normal, safe operation.Control room 3 is provided with air gauge 31, and mother device 11, outlet casing tube 15 are pacified On the housing of gas tank 16, coupling for external equipment and cable and gas tank internal switch is played, described gas tank 16 is by stainless steel Plate weld forms, and to prevent the influence expanded with heat and contract with cold to vacuum interrupter of epoxy part, vacuum extinction chamber enclosure makees encapsulated processing. Non- SF6 insulating gas is filled with gas tank 16, described non-SF6 insulating gas is nitrogen, carbon dioxide, dry air or non- The forming gas of greenhouse effects.Installation three-position switch operation mechanism 22 and circuit breaker operation mechanism 21, control room in mechanism chamber 2 3 are provided with air gauge etc..The pressure releasing chamber 5 can may also set up special pressure release passage to family to the direct pressure release of bottom cable duct Outer pressure release.Pole meets the requirement of vacuum extinction outdoor insulation, in the prior art, original gas isolated products of SF6 Installing type pole only need to be used, but is that non-SF6 gases use installing type pole, insulation and arc quenching effect are bad, and security is significantly Reduce, the vacuum interrupter conductive pieces related to breaker are embedded into epoxy resin or heat by the pole of this programme simultaneously Pole is formed in this kind of solid insulating material easily solidified of plastic material, whole circuit breaker polar is turned into an entirety Part, its modularized design is simple in construction, and detachable part is few, and reliability is high；With high insulating bar ability, it will Surface insulation becomes solid insulation, compared to air insulation, reduces the influence of environment, substantially increases dielectric strength；It can make Breaker size reduces, and is advantageous to switch cubicle miniaturization；

Described breaker 12 is solid-sealing vacuum arc extinguishing breaker.Described breaker 12 includes a main shaft and couples three Insulated tension pole on phase breaker, main shaft are connected by sealing flange 161 with the circuit breaker operation mechanism 21 outside gas tank 16, open circuit The actuating three-phase breaker of device operating mechanism 21 synchronously completes combined floodgate or separating brake；The end of incoming cables of breaker 12 is connected with bus device 11, gone out Line end is connected with the static contact 131 of three-station 13.

Described mother device 11 is fixed sealing type mother device, mother device 11 be arranged on gas tank 16 top or sidepiece or top, Sidepiece is installed simultaneously, and part of the mother device 11 outside gas tank 16 connects other external switch equipment or inlet wire cable, in gas tank Part inside 16 is connected with the static contact 131 of three-station 13.Static contact 131 is the static contact without bin, is shaped as C-shaped Structure, one end are connected with three-station 13, and one end is connected with mother device 11.

Described three-station 13 is the rotary three position switch of three-phase synchronous disconnecting link formula, and three-station 13 is by close Envelope flange 162 is connected with the three-position switch operation mechanism 22 outside gas tank 16, the station of 22 actuating of three-position switch operation mechanism three Switch 13 is connected respectively to connection position, isolated bit and ground connection position；It is connected after the three-phase short circuit of grounding contact 132 with the housing of gas tank 16, Static contact 131 is connected with the leading-out terminal of breaker 13, and moving contact 133 couples with bus 14.The three-station 13 of integration, switch It is few to produce electric arc, incorporates the function of both disconnecting switch and earthed switch, and is completed by a knife, can thus realize Mechanical latching, prevents the powered conjunction earthing knife-switch of major loop, and security is more preferable.

Described bus 14 is naked copper formula, and the one end of bus 14 is connected with the leading-out terminal of breaker 13, the other end and lead collar Pipe 15 connects.Described outlet casing tube 15 is fixed sealing type；Part inside gas tank 16 is connected with bus 14, outside gas tank 16 Part be connected with outlet cable.

This programme carries out the insulation set of switch cubicle using lower isolation scheme, and the cable connection of gas-insulated switchgear is There are European c-type sleeve pipe and T-shaped cable termination to coordinate what is completed, be that electric conductor, outside are band semiconductives inside the combination after connection Insulator；In overhaul of the equipments and need to be by cable grounding (preventing anti-power transmission), the cabled manner of such product, nothing when safeguarding Method directly hangs drop bar, therefore need to be by the earthed system inside switchgear by cable grounding；Three-station is in bus bar side The definition of referred to as upper isolation：Three-station (being made up of earthed switch and disconnecting switch two parts) is connected with main bus-bar, is broken Road device and cable connection, the switchgear cable grounding of this structure need that three-station first is got into earthing position, then will be disconnected Road device closes a floodgate, and realizes cable grounding；The definition that three-station is isolated under cable side abbreviation：Breaker is connected with main bus-bar, Three-station and cable connection, the switchgear cable grounding of this structure, it is only necessary to which three-station is got into earthing position , without breaker actuation.Can directly it be switched using the mode of lower isolation, folding speed faster, and reduces more The potential safety hazard of secondary action, security is more preferable, more stable.

The major loop of the switchgear of this programme is by mother device 11, three-station 13, breaker 12, bus 14 and outlet Sleeve pipe 15 is formed, and earth-return circuit is made up of gas tank 16, three-station 13, breaker 12, bus 14, outlet casing tube 15.Entering Row operation, corresponding position is connected to by the actuating three-station 13 of three-position switch operation mechanism 22, switched Switching action, use solid-sealing vacuum arc extinguishing breaker so that in the gas tank 16 of insulation by vacuum interrupter complete go out Arc works, and the structure of fixed sealing type ensure that, the high intensity of insulation effect.Vacuum interrupter utilizes high vacuum operational insulation arc extinguishing Medium, the on-off function of power circuit is realized by sealing a pair of contacts in a vacuum, when it disconnects the electric current of certain numerical value When, dynamic/static contact in the moment of separation, current constriction to contact just separated a little on, occur resistance between electrode acutely increase and Temperature improves rapidly, until the evaporation of electrode metal occurs, while forms high electric-field intensity, cause extremely strong strong transmitting and Gap breakdown, produce vacuum arc, when power current is close to zero, at the same be also clearance between open contacts increase, vacuum arc etc. Gas ions spread to surrounding quickly, and after arc current zero passage, the medium of contact gap is changed into insulator from electric conductor rapidly, then Electric current is broken.Due to the special tectonic of contact, contact gap can produce appropriate longitudinal magnetic field during arcing, and this magnetic field can make Electric arc is evenly distributed on contact surface, maintains low arc voltage, so that vacuum interrupter has dielectric strength after higher arc Resume speed, small arc energy and small corrosion rate.So, just improve the ability of vacuum interrupter drop-out current and make Use the life-span.Breaker 12 directly carries out arc extinguishing processing, avoids because non-SF6 gases are under insulation effect, arc extinguishing is incomplete Effect.

Embodiment 2

Embodiment 2 is substantially the same manner as Example 1, in addition to, the pressure release of anti-internal arcing is installed on described gas tank 16 Device I163.Pressure relief device I163, pressure relief device can be the various dresses that can carry out pressure release in the electrical apparatus such as relief valve Put, vent pressure can be adjusted as needed, ensure that, the pressure in gas tank 16 will not be too high, and switchgear is safe, steady It is fixed.

Embodiment 3

Embodiment 3 and embodiment 1 or 2 are essentially identical, in addition to, described cable vault 4 is provided with pressure relief device II41.Let out Pressure device can be the various devices that can carry out pressure release in the electrical apparatus such as relief valve, automatic decompression device, ensure that, gas Pressure in case 16 will not be too high, and switchgear is safe and stable.

Embodiment 4

Embodiment 4 and embodiment 1 or 2 or 3 are essentially identical, and difference is, the three-station 13 of this programme uses The anglec of rotation is 90 ° of three-station, because static contact is arranged to the C-shaped configuration of no bin, it is necessary to set angle initialization only Need to reach 90 °, avoid because operating mechanism caused by the irregular angle of existing 105 ° of switch is being operated When, switchs not in place or excessive, ensure that switch is stable in switching action, folding efficiency high.

Embodiment 5

Embodiment 5 is substantially the same manner as Example 1, and difference is, bus 14 is naked copper rod, the one end of bus 14 and three works The moving contact 133 of bit switch 13 connects, the other end and outlet casing tube 15 connect.Bus 14 is naked connection bus；It is outside directly with Insulating gas contacts, it is not necessary to is closed using outer sleeve.Fixed sealing type or outside setting must be used in normal design Bus, because this programme employs the arc extinguishing device in non-SF6 gases, vacuum interrupter make it that its arc quenching effect is more preferable, its Under conditions of ensureing designed distance, insulating properties and arc extinction performance are fine, can ensure insulation and arc extinguishing using naked connection bus Effect it is up to standard, and can reduce environmental pollution, it is cost-effective.

Schematically the invention and embodiments thereof are described above, this describe it is no restricted, not In the case of the spirit or essential characteristics of the present invention, the present invention can be realized in other specific forms.Institute in accompanying drawing What is shown is also one of embodiment of the invention, and actual structure is not limited thereto, any attached in claim Icon note should not limit involved claim.So if one of ordinary skill in the art is enlightened by it, do not departing from In the case of this creation objective, the frame mode similar to the technical scheme and embodiment are designed without creativeness, all should Belong to the protection domain of this patent.In addition, the word of " comprising " one is not excluded for other elements or step, "one" word before element It is not excluded for including " multiple " element.The multiple element stated in claim to a product can also by an element by software or Person hardware is realized.The first, the second grade word is used for representing title, and is not offered as any specific order.

Claims (10)

1. one kind is without isolated switchgear under bin static contact non-SF 6 gas insulative, it is characterised in that：Including air chamber (1), mechanism Room (2), control room (3), cable vault (4) and pressure releasing chamber (5), air chamber (1) include mother device (11), the breaker being sequentially connected (12), three-station (13), bus (14), outlet casing tube (15) and gas tank (16), three-station (13), breaker (12), bus (14) is arranged in closed gas tank (16), and mother device (11), outlet casing tube (15) are arranged on gas tank (16) housing On, be filled with non-SF6 insulating gas in gas tank (16), mother device (11) be arranged on the outside part of gas tank (16) and switchgear or Inlet wire cable connection, it is connected in the internal part of gas tank (16) with the static contact (131) of three-station (13), described stationary contact Head (131) is the static contact without bin.

2. one kind according to claim 1 exists without isolated switchgear under bin static contact non-SF 6 gas insulative, its feature In：Described non-SF6 insulating gas is the forming gas of nitrogen, carbon dioxide, dry air or non-greenhouse effects.

3. one kind according to claim 1 exists without isolated switchgear under bin static contact non-SF 6 gas insulative, its feature In：Described mother device (11) is fixed sealing type mother device, and mother device (11) is arranged on the top or sidepiece or top of gas tank (16) Installed simultaneously with sidepiece.

4. a kind of without isolated switchgear under bin static contact non-SF 6 gas insulative according to claim 1 or 3, it is special Sign is：Described three-station (13) is the rotary three position switch of three-phase synchronous disconnecting link formula, and three-station (13) is logical Cross sealing flange (162) to be connected with the three-position switch operation mechanism (22) of mechanism chamber (2), three-position switch operation mechanism (22) Actuating three-station arrives connection position, isolated bit and ground connection position respectively；After grounding contact (132) three-phase short circuit with gas tank (16) shell Body is connected, and static contact (131) is connected with breaker (13) leading-out terminal, and moving contact (133) couples with bus (14).

5. one kind according to claim 1 exists without isolated switchgear under bin static contact non-SF 6 gas insulative, its feature In：Described breaker (12) is the insulation on solid-sealing vacuum arc extinguishing breaker, including a main shaft connection three-phase breaker Pull bar, main shaft are connected by circuit breaker operation mechanism (21) of the sealing flange (161) with gas tank (16) outside, circuit breaker operation mechanism (21) actuating three-phase breaker synchronously completes combined floodgate or separating brake；Breaker (12) end of incoming cables is connected with bus device (11), leading-out terminal It is connected with the static contact (131) of three-station (13).

6. one kind according to claim 5 exists without isolated switchgear under bin static contact non-SF 6 gas insulative, its feature In：Described bus (14) is naked copper rod, and bus (14) one end is connected with the moving contact (133) of three-station (13), is another End is connected with outlet casing tube (15).

7. a kind of without isolated switchgear under bin static contact non-SF 6 gas insulative according to claim 1 or 6, it is special Sign is：Described outlet casing tube (15) is fixed sealing type；It is connected in the internal part of gas tank (16) with bus (14), in gas tank (16) outside part is connected with outlet cable.

8. one kind according to claim 1 exists without isolated switchgear under bin static contact non-SF 6 gas insulative, its feature In：Described gas tank (16) is welded by stainless steel plate.

9. a kind of without isolated switchgear under bin static contact non-SF 6 gas insulative according to claim 1 or 8, it is special Sign is：The pressure relief device I (163) of anti-internal arcing is installed on described gas tank (16).

10. one kind according to claim 1 is without isolated switchgear under bin static contact non-SF 6 gas insulative, its feature It is：Described cable vault (4) is provided with pressure relief device II (41).