An on-cable pressure barrier device, manufacturing method for manufacturing said device and electric compressor line comprising said device

Abstract

An on-cable pressure barrier device (6) mounted on a cable comprising an insulating sheath (3d) surrounding a plurality of individually insulated wires (3e), the portion of the cable within the on-cable pressure barrier device being stripped of all insulating material so as to expose a conductive core (6d1, 6d2) of each wire (6c1, 6c2) of the plurality of wires, the conductive core (6d1, 6d2) of each wire (6c1, 6c2) of the plurality of wires (6c1, 6c2) of the plurality of wires (6c1, 6c2) of the plurality of wires (6c1, 6c2) of the plurality of wires (6c1, 6c2) being stripped of the insulating material. The on-cable pressure barrier device (6) comprises a resin portion (6f) extending over the first portion (6d1) of the bare conductive core of each wire connected to the first portion (3c1) of the cable by the first portion (6d1) of the wire, the second portion (6d2) of the bare conductive core of each wire connected to the second portion (3c2) of the cable through the second portion (6c2) of the wire extends to the outside of the resin portion (6f), the bare conductive core of each wire and the resin portion (6f) being capable of stopping diffusion of gas entering from the first portion of the cable.

Description

Technical Field

[0001] The present invention relates to a sealing barrier for cable connections, particularly for cable connections in pressurized environments. Background Technology

[0002] Electric compressors incorporate the compressor and turbine within a single hermetically sealed housing, thereby reducing the risk of leakage. In some implementations, electric compressors also include magnetic bearings or AMB (an abbreviation for "active magnetic bearing").

[0003] Such electric compressors are typically used to pressurize explosive substances like natural gas or hazardous gases like carbon dioxide. In these applications, the electric compressor operates at internal pressures much higher than atmospheric pressure. Due to the hazardous gases involved, such electric compressors are usually placed in restricted access areas, such as ATEX or HAZLOC areas. ATEX stands for "Atmosphere Explosible" in French and refers to the European Directive on hazardous and explosive atmospheres. This is the European standard equivalent to the US standard HAZLOC. HAZLOC stands for "HAZardous LOCation" and is the US standard on hazardous and explosive atmospheres.

[0004] The control cabinet used to control such an electric compressor is not located in a restricted access area like the electric compressor itself, but in a safe area that complies with the ATEX directive.

[0005] Attached Figures Figure 1 An example is shown of an electric compressor ICL (an abbreviation for "moto-compressor line"), which includes a medium-voltage junction box 1 that connects a control cabinet 2 to an electric compressor 3. A first cable 2c connects the control cabinet 2 to the medium-voltage junction box 1, and a second cable 3c connects the medium-voltage junction box 1 to the electric compressor 3.

[0006] The medium-voltage junction box 1 and the electric compressor 3 are both located in the ATEX area, while the control cabinet 2 is located in the safety area as outlined in the attached figure 5.

[0007] Each cable 2c and 3c includes the insulation sheath 2d and 3d and at least two conductors 2e and 3e. Each cable 2c and 3c is ATEX certified.

[0008] These cables 2c and 3c are connected to the medium-voltage junction box 1 and the control cabinet 2 through cable sealing joints 2a, 2f and 3f.

[0009] Control cabinet 2 is connected to electric compressor 3 via ATEX-certified connectors 3a and 3b. The ATEX-certified connectors provide a first pressure barrier for gas diffusion via electrical connection.

[0010] However, a complete or partial failure of connectors 3a and 3b may cause gas leakage in the second cable 3c. The gas can then diffuse along cable 3b to the medium-voltage junction box 1. The insulating sheath 3d will then act like a hose, conveying the gas from connectors 3a and 3b to the medium-voltage junction box.

[0011] In this situation, there is a risk of gas accumulating in the medium-voltage junction box 1, and a risk of gas diffusing secondary along the first cable 2c into the control cabinet 2 in the safe area.

[0012] The arrows indicate the first gas diffusion and the second gas diffusion.

[0013] Such secondary diffusion would damage the ATEX / HAZLOC partition and become a hazard to personnel and facilities housing electric compressors.

[0014] To mitigate such potential failures, it is necessary to prevent gas from accumulating in the medium-voltage junction box and from secondary diffusion through the first cable 2c.

[0015] Typically, a cover 4b and a gas detector 4c are installed. In the event of gas diffusion via the second cable 3c, gas accumulated in the medium-voltage junction box 1 is discharged through the vent valve 4a and guided through the cover 4b to the gas detector 4c. Once gas is detected, a signal is issued, which is associated with an alarm and / or emergency plan. Such an emergency plan may include shutting down the electric compressor 3 or notifying on-site personnel of the incident.

[0016] It is understandable that triggering such alarms or emergency plans can slow down or hinder the operation of facilities, including those with electric compressors.

[0017] There is a need for an electric compressor that can mitigate any risk of gas diffusion while maximizing its operating time.

[0018] The literature GB1188286, DE2209629 and DE2440826 are known.

[0019] Document GB1188286 discloses a method for forming a gas seal in a cable. The method involves removing the insulating sheath and adding a porous material instead of the insulating sheath, thereby allowing gas to diffuse out of the cable.

[0020] However, the method does not disclose how to prevent the gas from further diffusing through the gas seal in the cable.

[0021] Documents DE2209629 and DE2440826 disclose methods for sealing cables after splitting. These documents relate to restoring the integrity of the sheath but do not mention gas diffusion or potential barriers to such diffusion.

[0022] These documents did not solve this technical problem. Summary of the Invention

[0023] The object of this invention is a pressure barrier device for a cable, which includes an insulating sheath surrounding a plurality of individually insulated conductors. Within the pressure barrier device, all insulation material is stripped from the cable to expose the conductive core of each of the plurality of conductors. The pressure barrier device includes a resin portion extending over a first portion of the exposed conductive core of each conductor connected to a first portion of the cable, and a second portion of the exposed conductive core of each conductor connected to a second portion of the cable extending outside the resin portion. The exposed conductive core of each conductor and the resin portion are capable of preventing the diffusion of gas entering from the second portion of the cable.

[0024] The pressure barrier device on the cable may include a housing equipped with a vent valve that communicates with the interior of the housing containing atmospheric air.

[0025] The comb-like component can be installed and secured to the housing in a removable manner to keep the wires separated.

[0026] Multiple conductors may include at least two conductors of at least two different specifications or diameters.

[0027] The comb can be installed and removably secured to the housing to keep the wires spaced apart. Due to the varying spacing between the teeth of the comb, it can accommodate different wire specifications.

[0028] The comb-shaped component can be placed on the exposed conductive core of the wire.

[0029] Two comb-shaped components can be provided, each of which is mounted on one side of the exposed conductive core of the wire.

[0030] The housing may include three parts, with the first part corresponding to one half of the housing and extending from the first part of the cable to the second part of the cable. The other half of the housing is divided into a second part and a third part, with the second part extending to the second part of the cable and the third part extending to the first part of the cable.

[0031] Another object of the present invention is an electric compressor pipeline comprising a cable pressure barrier device as described above, wherein the electric compressor pipeline includes a medium-voltage junction box connected to a control cabinet via a first cable and connected to the electric compressor via a second cable, each cable comprising an insulating sheath surrounding at least two individually insulated conductors, the medium-voltage junction box, the electric compressor, and the second cable being located in a hazardous or explosive environment, the control cabinet and the first cable being located in a safe environment, and the cable pressure barrier device being mounted on the second cable to mitigate gas diffusion from the electric compressor to the control cabinet via the medium-voltage junction box.

[0032] Another object of the present invention is a method for manufacturing a pressure barrier device on a cable as described above, the method comprising the following steps:

[0033] a. Determine the appropriate location of the pressure barrier device on the cable.

[0034] b. At the determined location, remove the insulation sheath of the cable without cutting the conductors contained therein.

[0035] c. For each conductor exposed due to the removal of the cable's insulation sheath, remove a portion of the conductor's insulation sheath to expose the conductive core.

[0036] d. Insert the cable through the washers located on opposite sides of the first part of the housing, with the cable residing within each washer such that the cable between the two washers is without its insulating sheath.

[0037] e. Install the second part of the housing to form an airtight seal with the first part of the housing.

[0038] f. Curable resin is poured into the housing such that a first portion of the exposed conductive core of each conductor, together with each conductor between the first exposed conductive core portion and the first washer, is encapsulated in the resin, the first washer contacting the cable extending from the pressure barrier device on the cable to the medium-voltage junction box.

[0039] g. To cure the resin.

[0040] Another object of the present invention is a method for manufacturing a cable pressure barrier device comprising a three-part housing as described above, the method comprising the following steps:

[0041] a. Determine the appropriate location of the pressure barrier device on the cable.

[0042] b. At the determined location, remove the cable's insulation sheath without cutting the included conductors.

[0043] c. For each conductor exposed due to the removal of the cable's insulation sheath, remove a portion of the conductor's insulation sheath to expose the conductive core.

[0044] d. Insert the cable through the washers located on opposite sides of the first part of the housing, with the cable residing within each washer such that the cable between the two washers is without its insulating sheath.

[0045] e. Install the second part of the housing to achieve an airtight seal with the first part of the housing.

[0046] f. Curable resin is poured into the housing such that a first portion of the exposed conductive core of each conductor, together with each conductor between the first exposed conductive core portion and the first washer, is encapsulated in the resin, the first washer contacting the cable extending from the pressure barrier device on the cable to the medium-voltage junction box.

[0047] g. Allow the resin to cure, and then install the third part of the housing, so that it achieves an airtight seal with both the first and second parts of the housing. Attached Figure Description

[0048] The invention will be better understood by studying specific implementations of various embodiments, which are considered by way of completely non-limiting example and illustrated in the accompanying drawings, wherein:

[0049] [ Figure 1 The image shows an electric compressor including a medium-pressure junction box with a vent valve and a detector.

[0050] [ Figure 2 An electric compressor including a cable pressure barrier device according to the invention is shown.

[0051] [ Figure 3 The main components of the pressure barrier device on the cable are shown.

[0052] [ Figure 4 The main components of a cable pressure barrier device, including comb-shaped elements, are shown, and

[0053] [ Figure 5 The main part of the housing of the pressure barrier device on the cable is shown. Detailed Implementation

[0054] Attached Figures Figure 2 An electric compressor according to the present invention is illustrated. (See accompanying drawings.) Figure 1 The components shared by the illustrated control systems have the same reference numerals.

[0055] The electric compressor includes a medium-voltage junction box 1 that connects the control cabinet 2 to the electric compressor 3. A first cable 2c connects the control cabinet 2 to the medium-voltage junction box 1, and second cables 3c1 and 3c2 connect the medium-voltage junction box 1 to the electric compressor 3. The first cable 2c and the second cables 3c1 and 3c2 are connected together by a connecting plate 1a included in the medium-voltage junction box 1.

[0056] The medium-voltage junction box 1 and the electric compressor 3 are both located in the ATEX area, while the control cabinet 2 is located in the safety area as outlined in the attached figure 5.

[0057] Each cable (2c, 3c1, 3c2) includes insulation sheaths (2d, 3d) and multiple conductors (2e, 3e). Each cable is ATEX certified.

[0058] The medium-voltage junction box includes a first cable sealing connector 2f, through which a first cable 2c is connected to the control cabinet 2. The control cabinet 2 includes its own cable sealing connector 2a, through which the first cable 2c is connected.

[0059] The medium-voltage junction box includes a second cable sealing joint 3f, through which second cables 3c1 and 3c2 are connected.

[0060] Control cabinet 2 is connected to electric compressor 3 via ATEX certified connectors 3a and 3b.

[0061] With regard to the attached drawings [ Figure 1 The illustrated control system describes a similar risk of gas diffusion, where gas can diffuse from the electric compressor 3 to the medium-voltage junction box 1 via the second cables 3c1 and 3c2, even when using ATEX-certified cables 2c, 3c1, and 3c2 and ATEX-certified connectors 3a and 3b.

[0062] To prevent such gas diffusion and any consequences (gas accumulation in the medium-voltage junction box 1 or further diffusion through the first cable 2c), a cable pressure barrier device 6 is provided on the second cables 3c1 and 3c2. More precisely, the first portion 3c1 of the second cable connects the medium-voltage junction box 1 to the cable pressure barrier device 6. The second portion 3c2 of the second cable connects the cable pressure barrier device 6 to the electric compressor 3. Although both portions 3c1 and 3c2 are listed, as will be apparent in this specification, the second cables 3c1 and 3c2 are not interrupted during the installation of the cable pressure barrier device 6.

[0063] Attached Figures Figure 3The main components of the cable pressure barrier device 6 according to the invention are illustrated. The cable pressure barrier device 6 is particularly advantageous because its installation does not require interruption of the support cables 3c1, 3c2 (i.e., the conductors included in the second cables 3c1, 3c2 remain intact during installation).

[0064] The pressure barrier device 6 on the cable includes a housing 6a, a vent valve 6b, two gaskets 6g and 6h, and a resin part 6f.

[0065] The housing 6a is designed to be opened into at least two parts for placement on the second cables 3c1, 3c2.

[0066] The second cables 3c1 and 3c2 are fixed in the housing 6a by the gaskets 6g and 6h, which makes the housing 6a airtight.

[0067] The insulation sheath 3d of the second cables 3c1 and 3c2 included in the housing 6a is stripped. Therefore, at least one of the multiple conductors 3e included in the second cables 3c1 and 3c2 is loose within the housing 6a.

[0068] To enable the cable pressure barrier device 6 to achieve its barrier performance, a portion of the insulation sheath of each conductor 6c1, 6c2 is stripped, exposing its conductive cores 6d1, 6d2. Within the cable pressure barrier device 6, each conductor includes a first portion 6c1 with its insulation sheath, a first exposed conductive core portion 6d1, a second exposed conductive core portion 6d2, and a second portion 6c2 with its insulation sheath. Although both portions 6c1, 6c2 of each conductor are listed, as will be apparent in this specification, the conductors 6c1, 6c2 and their exposed conductive cores 6d1, 6d2 are not interrupted during the installation of the cable pressure barrier device 6.

[0069] Then, a resin portion 6f is formed in the housing 6a such that it covers the first portion 6d1 of the exposed conductive core of each wire 6c1, 6c2 and the first portion 6c1 of each wire to the first washer 6g, through which the first portion 3c1 of the second cable passes. The resin portion 6f extends into the housing 6a in other directions.

[0070] The remaining portion of the housing remains unresin-free and includes a second portion 6d2 of the exposed conductive core of each wire and a second portion 6c2 of each wire leading to a second washer 6h, through which a second portion 3c2 of the second cable passes.

[0071] Regarding gas diffusion within the insulating sheath 3d of the second section 3c2 of the second cable, the gas is released into the housing 6a through the second section 6d2 of the exposed conductive core of each conductor extending to the outside of the resin section 6f.

[0072] However, due to the mating contact between the resin portion 6f, the first portion 6d1 of each exposed conductive core, and the first portion 6c1 of each conductor, gas diffusion cannot propagate further, particularly along the first portion 3c1 of the second cable and the first portion 6d1 of each conductor. The gas is then discharged through the vent valve 6b.

[0073] Therefore, it should be understood that the internal space of the housing 6a includes atmospheric air, at least one gas (in the event of gas leakage within the housing), or a mixture of atmospheric air and at least one gas. The atmospheric air, at least one gas, or mixture of atmospheric air and at least one gas within the housing has a pressure corresponding to, equivalent to, or close to atmospheric pressure. In a preferred embodiment, the atmospheric air, at least one gas, or mixture of atmospheric air and at least one gas within the housing has a pressure equal to atmospheric pressure. The object of the present invention is to provide an internal space of the housing that is not pressurized relative to the external air environment due to the action of the vent valve 6b.

[0074] To fully understand the working principle of the pressure barrier device 6 on the cable, it is necessary to first understand the basic laws of diffusion.

[0075] Gas diffusion occurs when a pressure difference exists between two connected regions. In this application, the electric compressor 3 is included within a housing in which the gas is pressurized. The electric compressor 3 must be powered and controlled, which means that at least one cable 3c1, 3c2 is present. Cables 3c1, 3c2 are connected via an ATEX-certified connector as described above. This connector is designed to form a first pressure barrier against gas diffusion.

[0076] However, in some cases, the first pressure barrier may fail, and gas can still diffuse through the second cable sheath 3d and the insulation sheaths of each individual conductor 6c1, 6c2, which then act as conduits. Upon reaching the pressure barrier device 6 on the cable, the second cable sheath 3d is interrupted at the second gasket 6h. Any gas that diffused through the second cable sheath 3d then diffuses into the atmosphere around the gasket or within the pressure barrier device housing 6a on the cable.

[0077] In a similar manner, after reaching the pressure barrier device 6 on the cable, the insulation sheath of each conductor is interrupted at the exposed core portions 6d1 and 6d2.

[0078] Then, any gas that diffuses through the conductor insulation sheath diffuses within the pressure barrier device housing 6a on the cable.

[0079] In both cases, any gas that diffuses within the housing 6a of the pressure barrier device on the cable is then discharged into the ATEX atmosphere through the vent valve 6b. The vent valve 6b is used to maintain the pressure within the housing 6a at atmospheric pressure. This venting prevents gas from accumulating in the housing 6a. Finally, due to the fit between the resin portion 6f, the first portion 6d1 of the exposed conductive core of each conductor, and the housing 6a, there is no longer a path for further gas diffusion. The pressure is also maintained at a lower level due to the vent valve 6b, further preventing gas diffusion.

[0080] It is evident that the pressure barrier device 6 on the cable can be regarded as a second pressure barrier to resist the diffusion of gas originating from the electric compressor 3.

[0081] In some implementations, after the conductive cores 6d1 and 6d2 of wires 6c1 and 6c2 are exposed, there is a risk of short circuit or arcing between these wires. To keep the exposed conductive cores 6d1 and 6d2 spaced apart, a comb-like member 6e is then installed and removably secured to the housing 6a, as shown in the attached figure. Figure 4 As illustrated, the comb 6e is clearly made of a non-conductive material. Another advantage of the comb 6e is the ease of setting the resin portion 6f, which is achieved by providing a visual indication of the amount of resin to be poured, especially when the comb 6e is placed on the bare conductive cores 6d1, 6d2 of the wire.

[0082] When the comb 6e is used as such a visual indicator, it is located between the first portion 6d1 and the second portion 6d2 of the exposed conductive core of each wire 6c1, 6c2. It should be noted that the comb 6e can be removed before the curable resin is poured and allowed to cure. After the resin has cured, the comb is embedded within the resin portion 6f and can no longer be removed.

[0083] In other embodiments, the comb 6e can be placed further away from the exposed conductive cores 6d1 and 6d2 of the conductors, which still include their insulating sheaths, provided that the exposed conductive core portions 6d1 and 6d2 are kept at an appropriate distance from each other to mitigate the risk of short circuits and arcing. In still other embodiments, two combs can be provided on the exposed conductive core portions 6d1 and 6d2 of the conductors, or one comb can be provided on each side of the exposed conductive core portions 6d1 and 6d2 of the conductors.

[0084] In some alternative embodiments, conductors 6c1 and 6c2 have at least two different specifications or diameters. Due to the different spacing between the teeth, at least one comb-like member 6e can accommodate different conductor specifications, thereby forming openings of different sizes.

[0085] It should be emphasized that the continuity of the second cables 3c1 and 3c2 will not be altered by the installation of the pressure barrier device 6 on the cable. The first portion 3c1 and the second portion 3c2 of the second cable are only intended to mark portions of the second cable on one side and the other side of the pressure barrier device 6 on the cable.

[0086] A method for manufacturing a pressure barrier device on a cable will now be described. This method includes the following steps.

[0087] During the first step, the position of the pressure barrier device 6 on the cable is determined on the second cable 3c1, 3c2 that connects the medium-voltage junction box 1 to the electric compressor 3.

[0088] At the determined location, the insulation sheath 3d of the second cables 3c1 and 3c2 is removed along a cable length equal to the length of the housing 6a of the pressure barrier on the cable. The insulation sheath 3d is removed without cutting the conductors 6c1 and 6c2 contained therein.

[0089] Then, each individual conductor 6c1, 6c2 included in the second cables 3c1, 3c2 is untied and unwound. A limited portion of each conductor 6c1, 6c2 is stripped of its insulation sheath, exposing the conductive cores 6d1, 6d2.

[0090] During the second step, the second cables 3c1 and 3c2 are inserted through washers 6g and 6h, respectively, in such a manner that washers 6g and 6h are each positioned at the end of the insulating sheath 3d after a portion is removed in the first step of the manufacturing process. The second washer 6h is located on the electric compressor 3 side, and the first washer 6g is located on the medium-voltage junction box side.

[0091] Gaskets 6g and 6h are disposed in the first part of housing 6a.

[0092] Then, the second part of the housing 6a is sealed with the first part of the housing 6a.

[0093] A curable resin, particularly PU (an abbreviation for "Polyurethane"), is poured into the housing to fill it, such that the first exposed conductive core portion 6d1 of each wire 3c1, 3c2, together with the first portion 3c1 of each wire portion between the first exposed conductive core portion 6d1 and the first washer 6g, is partially enclosed in the resin.

[0094] In a specific implementation, at least one comb-shaped member 6e is attached to the housing in a removable manner before the curable resin is poured.

[0095] The resin can be a UV-curable resin or a heat-curable resin, the latter being preferred because heat can be applied through the housing. It should be understood that once the resin has cured, at least one comb-shaped member 6e is no longer removable.

[0096] The housing 6a has been described as comprising at least two parts. However, a three-part housing is preferred. (See attached figures) Figure 5 The example illustrates a three-part housing 6a.

[0097] The first part 6a1 corresponds to half of the housing 6a and extends from the first washer 6g to the second washer 6h.

[0098] The other half of the shell is divided into a second part 6a2 and a third part 6a3.

[0099] During the manufacturing process, the second portion 6a2 is installed before the curable resin is poured. The first portion 6a1 and the second portion 6a2 then form a container in which the curable resin can be poured from an opening corresponding to the location of the third portion 6a3. In one embodiment, the second half of the housing extends between the second portion 6a2 and the third portion 6a3 such that the second portion covers at least all of the resin portion 6f. This is advantageous because it reduces the risk of the curable resin flowing outside the housing 6a after it has been poured in.

[0100] Once the resin has cured, the third part 6a3 of the housing 6a is sealed by the first part 6a1 and the second part 6a2.

[0101] It should be understood that the attached diagram [ Figure 3 ]、[ Figure 4 ]and[ Figure 5 The diagram shows a vent valve 6b on the same side where the second gasket 6h is installed. However, the vent valve 6b is advantageously installed such that it is located in a part of the housing that is prone to any gas buildup.

[0102] If the density of the gas under consideration is higher than the density of the atmosphere surrounding the pressure barrier device 6 on the cable, it is more appropriate to position the vent valve 6b at the very top of the housing 6a.

[0103] If the density of the gas under consideration is lower than the density of the atmosphere surrounding the pressure barrier device 6 on the cable, it is more appropriate to position the vent valve 6b at the bottom of the housing 6a.

[0104] A pressure barrier device on a cable has been described in conjunction with an electric compressor in an electric compressor pipeline. However, it is evident that a pressure barrier on a cable can be used on any cable connected to a pressurized environment that may be subject to gas migration.

[0105] Pressure barrier devices on electric compressor lines and cables can mitigate gas diffusion to the electric compressor in the event of a leak in the ATEX connector.

[0106] Reference List :

[0107] 1: Medium voltage junction box

[0108] la: Connecting plate

[0109] 2: Control cabinet

[0110] 2a: Control cabinet cable sealing joint

[0111] 2c: First cable

[0112] 2d: First cable insulation sheath

[0113] 2e: Multiple conductors, at least two conductors, within the first cable

[0114] 2f: First cable sealing joint

[0115] 3: Electric compressor

[0116] 3a, 3b: ATEX connectors

[0117] 3c, 3c1, 3c2: Second cable

[0118] 3d: Second cable insulation sheath

[0119] 3e: Multiple conductors, at least two of which are inside the second cable

[0120] 3f: Second cable sealing joint

[0121] 4a: Vent valve

[0122] 4b: Cover

[0123] 4c: Gas detector

[0124] 5: Boundary between ATEX zone and security zone

[0125] 6: Pressure barrier device on cable

[0126] 6a: Shell

[0127] 6a1: First part of the shell

[0128] 6a2: Second part of the shell

[0129] 6a3: Third part of the shell

[0130] 6b: Vent valve for pressure barrier device on cable

[0131] 6c, 6c1, 6c2: Conductors included in the multiple conductors of the second cable

[0132] 6d, 6d1, 6d2: The conductive core of the wire

[0133] 6e: Comb-like component

[0134] 6f: Resin portion

[0135] 6g: First washer

[0136] 6h: Second washer

Claims

1. A pressure barrier device (6) for cables, said pressure barrier device being intended to be installed on cables (3c1, 3c2), said cables (3c1, 3c2) comprising an insulating sheath (3d) surrounding a plurality of individually insulated conductors (3e), characterized in that, The cables (3c1, 3c2) within the cable pressure barrier device (6) have all insulation stripped to expose the conductive cores (6d1, 6d2) of each of the plurality of conductors (6c1, 6c2). The cable pressure barrier device (6) includes a resin portion (6f) extending over the first portion (6d1) of the exposed conductive core of each conductor connected to the first portion (3c1) of the cable via the first portion (6d1) of the conductor, and extending to the outside of the resin portion (6f) over the second portion (6d2) of the exposed conductive core of each conductor connected to the second portion (3c2) of the cable via the second portion (6c2) of the conductor, and the exposed conductive cores of each conductor and the resin portion (6f) prevent the diffusion of gas entering from the second portion (3c2) of the cable.

2. The cable pressure barrier device according to claim 1, wherein the cable pressure barrier device (6) includes a housing (6a) equipped with a vent valve (6b), the vent valve (6b) communicating with an internal space of the housing (6a) including atmospheric air, the housing (6a) including the exposed conductive core of the conductor, the first portion (6d1) of the conductor, the second portion (6c2) of the conductor and the resin portion (6f).

3. The cable pressure barrier device according to claim 2, wherein the comb (6e) is removably attached to the housing (6a) to keep the conductors spaced apart.

4. The cable pressure barrier device according to claim 1, wherein the plurality of conductors comprises at least two conductors of at least two different specifications or diameters.

5. The cable pressure barrier device according to claim 4, wherein the cable pressure barrier device (6) includes a housing (6a) equipped with a vent valve (6b) communicating with an internal space of the housing (6a) including atmospheric air, the housing (6a) including the exposed conductive core of the conductor, the first portion (6d1) of the conductor, the second portion (6c2) of the conductor and the resin portion (6f), a comb (6e) being removably fixed to the housing (6a) to keep the conductors spaced apart, the comb (6e) including at least two teeth, a conductor being inserted between the at least two teeth, the comb (6e) being adaptable to different conductor specifications due to the variable spacing between the teeth.

6. The cable pressure barrier device according to claim 3 or 5, wherein the comb (6e) is placed on the exposed conductive core (6d1, 6d2) of the conductor.

7. The cable pressure barrier device according to any one of claims 3, 5 or 6, wherein two comb-shaped members are provided, each comb-shaped member being mounted on one side of the exposed conductive core (6d1, 6d2) of the conductor.

8. The cable pressure barrier device according to any one of claims 2, 3, 5 to 7, wherein the housing (6a) comprises three parts, a first part (6a1) corresponding to one half of the housing (6a) extending from the first part (3c1) of the cable to the second part (3c2) of the cable, the other half of the housing (6a) being divided into a second part (6a2) and a third part (6a3), the second part (6a2) extending to the second part (3c2) of the cable, and the third part (6a3) extending to the first part (3c1) of the cable.

9. An electric compressor pipeline including a pressure barrier device (6) on a cable according to any one of claims 1 to 8, wherein the electric compressor pipeline includes a medium-voltage junction box (1) connected to a control cabinet (2) via a first cable (2c) and connected to an electric compressor (3) via a second cable (3c1, 3c2), each cable (2c, 3c1, 3c2) including an insulating sheath (2d, 3d) surrounding at least two individually insulated conductors (2e, 3e), the medium-voltage junction box (1), the electric compressor (3) and the second cable (3c1, 3c2) being located in a hazardous or explosive environment, the control cabinet (2) and the first cable (2c) being located in a safe environment, and the pressure barrier device (6) on the cable being mounted on the second cable (3c1, 3c2) to mitigate gas diffusion from the electric compressor (3) to the control cabinet (2) via the medium-voltage junction box (1).

10. A method for manufacturing a pressure barrier device on a cable according to claims 2, 3, 5 to 7, wherein the manufacturing method comprises the following steps: a. Determine the appropriate position of the pressure barrier device (6) on the cable (3c1, 3c2). b. At the determined location, remove the insulating sheath (3d) of the cable without cutting the conductors (6c1, 6c2) included therein. c. For each conductor (6c1, 6c2) exposed due to the removal of the insulation sheath (3d) of the cable, a portion of the conductor insulation sheath is removed, exposing the conductive core (6d1, 6d2). d. The cable is inserted through washers (6g, 6h) disposed on opposite faces of the first part of the housing, the cable residing within each washer (6g, 6h) such that the cable (3c1, 3c2) between the two washers (6g, 6h) is at least partially without its insulating sheath. e. Install the second part (6a2) of the housing to form an airtight seal with the first part (6a1) of the housing. f. Curable resin is poured into the housing (6a) such that the first portion (6d1) of the exposed conductive core of each wire and the first portion (6c1) of each wire between the first exposed conductive core portion (6d1) and the first washer (6g) are enclosed in the resin, the first washer (6g) contacting the first portion (3c1) of the cable extending from the pressure barrier device (6) on the cable to the medium-voltage junction box (1). g. To cure the resin.

11. A method for manufacturing a pressure barrier device on a cable according to claim 8, the method comprising the following steps: a. Determine the appropriate location of the pressure barrier device (6) on the cable. b. At the determined location, remove the insulating sheath (3d) of the cable without cutting the conductors (6c1, 6c2) included therein. c. For each conductor (6c1, 6c2) exposed due to the removal of the insulation sheath (3d) of the cable, a portion of the conductor insulation sheath is removed, exposing the conductive core (6d1, 6d2). d. The cable is inserted through washers (6g, 6h) disposed on opposite faces of the first part of the housing, the cable residing within each washer (6g, 6h) such that the cable between the two washers (6g, 6h) is at least partially without its insulating sheath. e. Install the second part (6a2) of the housing to achieve an airtight seal with the first part (6a1) of the housing. f. Curable resin is poured into the housing (6a) such that the first portion (6d1) of the exposed conductive core of each wire and the first portion (6c1) of each wire between the first exposed conductive core portion (6d1) and the first washer (6g) are enclosed in the resin, the first washer contacting the first portion (3c1) of the cable extending from the pressure barrier device (6) on the cable to the medium-voltage junction box (1). g. Curing the resin and then installing the third part (6a3) of the housing, such that an airtight seal is achieved with both the first part and the second part of the housing.

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