CA1204478A - Insulating coating for fire proof electrical conductor - Google Patents
Insulating coating for fire proof electrical conductorInfo
- Publication number
- CA1204478A CA1204478A CA000441867A CA441867A CA1204478A CA 1204478 A CA1204478 A CA 1204478A CA 000441867 A CA000441867 A CA 000441867A CA 441867 A CA441867 A CA 441867A CA 1204478 A CA1204478 A CA 1204478A
- Authority
- CA
- Canada
- Prior art keywords
- layer
- insulating coating
- coating
- mica
- layers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
ABSTRACT
INSULATING COATING
The invention relates to an insulating coating conserving dielectric characteristic over a very wide range of temperatures.
This coating is constitued by a layer of mica, a glass fabric and a layer of polytetrafluorethylene.
This coating is mainly intented for protection against fire of electrical conductors fluid conduits, connecting components or equipments. Its more particulary applied to the protection of the electrical control, illuminating or sofety circuits in the nuclear chemical, oil, aeronautic, naval and space industries.
INSULATING COATING
The invention relates to an insulating coating conserving dielectric characteristic over a very wide range of temperatures.
This coating is constitued by a layer of mica, a glass fabric and a layer of polytetrafluorethylene.
This coating is mainly intented for protection against fire of electrical conductors fluid conduits, connecting components or equipments. Its more particulary applied to the protection of the electrical control, illuminating or sofety circuits in the nuclear chemical, oil, aeronautic, naval and space industries.
Description
Lowe The present invention relates to an insulting coating conserving its dielectric characteristics over a very wide range of temperatures.
Safety imperatives require that, in certain cases of use such as are encountered in the nuclear, oft, aeronautic, space, naval, chemical, etc.. industries, the circuits conveying energy or transmitting monitoring or control signals, withstand for a sufficient time the high temperatures due for example to a fire or, for the electrical circuits, to an abnormal rise in intensity of the electric current which passes through them, so as to enable the staff to be evacuated and equipment to be saved.
In the case of short circuits or over intensity, It is desired that the considerable increase in temperature of the conductor, or even the fusion thereof, does not provoke a fire by combustion of the coating.
To respond wholly or partly to these requirements, ceramic coatings, associated or not Vito glass fires, are already usual Further-more, coatings exist, particularly for electrical cables, which result from the association of fabrics of glass fires and metallic oxide.
The electrical cables intended for these uses exist in reinforced or non-reinforced form, depending on whether they are protected, at manufacture, from the risks of deterioration of mechanical origin by a rigid metal coating or whether they must be introduced, during asset-by, into metal tubes intended to ensure protection thereof. The rein-forced cables are constituted by one or more conductors insulated by a substance with low carbon content, protected by a cylindrical shell obtained by winding a metal ribbon or by a metal tube. The non-reinEorced cables are also constituted by conductors insulated by substances with low carbon content, but are sheathed by a complex of glass fire and silicone rubber or any other noncombustible material.
Among the insulating coatings presenting considerable resistance to high temperatures, those described in the following patents may be cited:
- FRY 381 377 which describes a coating constituted by a metal tube packed with magnesia.
- FRY 257 555 which describes a coating composed of a layer of inorganic noncombustible fires constituting a heat insulator and of a layer of halogen bonded to non-combustible fires by a resin.
-Aye 462 771 which describes a coating constitu~e(l by g78
Safety imperatives require that, in certain cases of use such as are encountered in the nuclear, oft, aeronautic, space, naval, chemical, etc.. industries, the circuits conveying energy or transmitting monitoring or control signals, withstand for a sufficient time the high temperatures due for example to a fire or, for the electrical circuits, to an abnormal rise in intensity of the electric current which passes through them, so as to enable the staff to be evacuated and equipment to be saved.
In the case of short circuits or over intensity, It is desired that the considerable increase in temperature of the conductor, or even the fusion thereof, does not provoke a fire by combustion of the coating.
To respond wholly or partly to these requirements, ceramic coatings, associated or not Vito glass fires, are already usual Further-more, coatings exist, particularly for electrical cables, which result from the association of fabrics of glass fires and metallic oxide.
The electrical cables intended for these uses exist in reinforced or non-reinforced form, depending on whether they are protected, at manufacture, from the risks of deterioration of mechanical origin by a rigid metal coating or whether they must be introduced, during asset-by, into metal tubes intended to ensure protection thereof. The rein-forced cables are constituted by one or more conductors insulated by a substance with low carbon content, protected by a cylindrical shell obtained by winding a metal ribbon or by a metal tube. The non-reinEorced cables are also constituted by conductors insulated by substances with low carbon content, but are sheathed by a complex of glass fire and silicone rubber or any other noncombustible material.
Among the insulating coatings presenting considerable resistance to high temperatures, those described in the following patents may be cited:
- FRY 381 377 which describes a coating constituted by a metal tube packed with magnesia.
- FRY 257 555 which describes a coating composed of a layer of inorganic noncombustible fires constituting a heat insulator and of a layer of halogen bonded to non-combustible fires by a resin.
-Aye 462 771 which describes a coating constitu~e(l by g78
-2 -a b akocl insul;ltin~, malarial matter hl~l~r~ lad with Solon oil, Ire eta by a metal sheath.
- FRY 482 769 which describes a heat-resistant, flexible, refractory, insulating coating composed of a porous basic material, a refractory coating capable of melting with the basic porous material at high temperature.
- FRY 206 563 which describes a high temperature insulation composed of a borosilicate glass and silica, which is melted at high temperature to form a mass having a viscosity greater than the viscosity of the glass and the silica at -the same temperature.
- FRY 360 530 which describes a frilled, vitrifiable body based on glass and quartz.
- USE 602 636 which describes a coating constituted by a helical covering with a glass malarial, with open weave, bearing a coating of synthetic rubber, flame-resistant, protected by a shc~th of polyvinylchlorkle.
- USE 632 412 which describes a self-adhesive tape constituted by an inter polymer lined with a glass cloth.
- US-f\.3 013 902 which describes materials coated with colloidal alum Noah.
- USE 0~5 336 which describes the preparation of lo in;ltcd ceramic products with glass cloth.
- European 8û.107217.4 which describes an insulating coaxing of ceramics constituted by polyamide and mica.
In an attempt to respond to the particularly severe requirements of certain uses, particularly on oil platforms, in the mining industries and nuclear power stations, installations in explosion- and fire-proof conduits have been imposed. This type of installation, although limiting the effects of self-propagation and the disengagement of fumes, presents the drawback of confining the heat to inside the conduit, which has for its effect to destroy the insulator and to create ruptures of cables or short circuits.
Furthermore, the majority of the above-mentioned coatings, although they ensure protection of the electrical cables and maintain tile insulation indispensable for a determined duration, do not allow ., 47~3 the installations to be subsequently reused without all the wirings having been previously replaced. The destructive effect is further accentuated when extinction means such as the projection of sea water of immersion are used.
Not to mention the fluid conduits which supply compressed gas or hydraulic liquid to the remote equipment which is vital to maintain in operation. The supply pipes which are generally used are only very imperfectly protected from direct heat and their constitution is not designed to resist for a sufficiently long time a considerable rise in temperature.
It is an object of the coating according to the invention to overcome the previously described drawbacks, as with this coating, in fact, when a temperature of about 1000C is attained, the glass fires which come into its composition are converted into a gel which is presented in the form of a pasty foam which constitutes a continuous dielectric and thermal barrier which reinforces the insular lion and protection of the conductor or the conduit. After lowering of the temperature, this protective barrier is converted into a layer of glass-coated mica, due to the disappearance, by combustion, of the polytetrafluoroethylene.
More particularly, this invention provides an insulating coating comprising a first layer comprised of mica, a second layer comprised of polytetrafluoroethylene on said first layer and a third layer comprised of glass fabric on said second layer, said coating maintaining its dielectric and thermal properties between -200C and 1,000C, and being converted to a gel at high temperature, wherein said gel maintains insulating properties at such high temperature and upon cooling from such high temperatures.
In consequence, this coating conserves its in-sulfating characteristics and its tightness, even after destruction of the combustible elements which are included in its basic composition (PTFE); this conserves for the installation its operational value even after a fire. This particular feature is of capital importance for the remote control of nuclear reactors after an incident having brought about a considerable increase in temperature in the hot go -pa-part, and for maintaining in operation the equipment directly acting for the survival of persons or for continuing a mission, as is the case in particular in aeronautics, the navy, aerospati.al operations and on drilling platforms.
Moreover, this coating may be obtained by ribboning, which makes it possible to envisage use thereof as desired, to protect certain fluid conduits passing through particularly exposed zones.
This coating is mainly characterized in that it conserves its dielectric and thermal properties between -~00C and 1000C and in that it is converted into a gel which maintains the insulation at high--------------------~478 temperatures and ensures insulation and tightness during cooling.
It is constituted by a layer of mica, a glass fabric end a layer of polytetrafluorethylene (PTFE). The layer of mica is obtained by win-ding, in one or more layers, a ribbon constituted by a lass tire fabric impregnated with a binding agent supporting particles of mica; the layer of polytetrafluoroethylene which is superposed on the layer of mica, is obtained by winding in one or more layers or by extrusion;
the lass fabric which is superposed on the layer of polytetrafluorethylene is obtained by winding a ribbon or by weaving elementary fires directly above the preceding layer.
The layer of mica is turned towards the conductor or the mom-bier to be protected and this protection is completed by a polymerization of the polytetrafluorethylene which ensures adherence between the layers.
The ribbons, of which the thickness is 0.06 mm to 0.12 mm, are wound with overlapping, for example by 50%, so as to double the thickness of the layer.
The gel obtained a high temperature vitrifies during drop in temperature to constitute, with the particles of mica which coat the element to be protected, a dielectric, tight insulating coating connect tying all the components of the circulate.
his coating may be produced as desired, from a ribbon obtained by superposition and adhesion of the different layers of materials entering in the composition of the complex; this enables protection to be ensured of elements or components other than electrical conductors or reinforce-mint of the protection against fire of existing installations.
his coating is in two forms, depending on whether it is question of protecting a supple conductor, a rigid conductor, a connecting combo-next or an equipment of particular form.
In the case of conductors, the ideal solution consists in superpo-sing a ribbon of mica, a polytetrafluorethylene protection and a glass fabric.
In the case of insulation of elements other than wires, the solution consists in superposing a ribbon of mica, a glass fabric and a polytetrafluorethylene insulation.
Other characteristics end a Ivanta~es will appear in the following description of a coating made according to the invention, intended for to row Sheehan of electrical Jon l l lyres, Levine by Wily of Ryan ill example.
Protection, at manufacture, of the conductors is effected as lot lows:
- A ribbon constituted by a glass fire fabric impregnated with a binding agent, generally silicon, supports the particles of mica and is preferably wound so that the particles of mica are turned towards the conductor, in one or more layers.
- layer of polytetrafluorcthylene is obtained by winclin~, above the preceding layer, of a ribbon or by extrusion.
- glass fire fabric is superposed on the layer of polytetrafluor-ethylene by ribboning or weaving elementary fires directly around the conductor.
This protection is completed by a polymerization of to poultry fluorethylene, which is presented in the form of impregnation in the case ox the glass fabric or of the covering of the fires in the case of direct weaving, and of the continuous layer obtained by ribboning or by extrusion. The effect of this polymerization is to obtain the ache-fence of the two upper layers and a certain adherence of the layer of polytetrafluorethylene with the ribbon supporting the particles ox mica, when the latter are turned towards the conductor.
According to a variant, protection of the flexible conductors may be obtained by superposition of a ribbon of mica, as defined previous-lye of a glass fabric the form of a braid or a ribbon, and of an insular lion of polytetrafluorethylene obtained by ribboning or extrusion.
This protection is completed by a treatment of connection similar to that described in the preceding case.
Ribboning operations are effected with an overlapping chosen so that at all points of the periphery of the cable, there are one or more thicknesses of each of the ribbons of which the width and thickness are defined as a function of the diameter of the wire.
The mica is turned towards the conductor so as to facilitate the laying bare which precedes the connecting operations and to obtain go a film of mica coaled with glass altar solidification of the Mel obtained at very high temperature, in order to facilitate disconnection of the colonial! if nccss;lry.
Conversion of the coating, by heating to about 1000(~ than cooling, may be sought a priori on rigid installations on which a perfect tightness is necessary, in order for example to shelter the components coming within their constitution from an aggressive or damp ambience.
In fact, the coating of the conductors according to the invention may be extended, by ribboning, to the other elements of the circuit so that, after fusion and solidification of the coating, the whole of the installation is coated with glass continuously and consequently in tight manner.
The coating according to the invention is mainly intended ion protection against fire, of electrical conductors, fluid conduits, connecting components or equipment.
It is more particularly applied to the protection of the electrical control, illuminating or safety circuits in the nuclear, chemical, oil, aeronautic, naval and space industries.
Of course, the invention is not limited to the embodiments described liereinabove, from which other forms and other embodiments may be provided without dcpartin~ from the scope of the invention.
- FRY 482 769 which describes a heat-resistant, flexible, refractory, insulating coating composed of a porous basic material, a refractory coating capable of melting with the basic porous material at high temperature.
- FRY 206 563 which describes a high temperature insulation composed of a borosilicate glass and silica, which is melted at high temperature to form a mass having a viscosity greater than the viscosity of the glass and the silica at -the same temperature.
- FRY 360 530 which describes a frilled, vitrifiable body based on glass and quartz.
- USE 602 636 which describes a coating constituted by a helical covering with a glass malarial, with open weave, bearing a coating of synthetic rubber, flame-resistant, protected by a shc~th of polyvinylchlorkle.
- USE 632 412 which describes a self-adhesive tape constituted by an inter polymer lined with a glass cloth.
- US-f\.3 013 902 which describes materials coated with colloidal alum Noah.
- USE 0~5 336 which describes the preparation of lo in;ltcd ceramic products with glass cloth.
- European 8û.107217.4 which describes an insulating coaxing of ceramics constituted by polyamide and mica.
In an attempt to respond to the particularly severe requirements of certain uses, particularly on oil platforms, in the mining industries and nuclear power stations, installations in explosion- and fire-proof conduits have been imposed. This type of installation, although limiting the effects of self-propagation and the disengagement of fumes, presents the drawback of confining the heat to inside the conduit, which has for its effect to destroy the insulator and to create ruptures of cables or short circuits.
Furthermore, the majority of the above-mentioned coatings, although they ensure protection of the electrical cables and maintain tile insulation indispensable for a determined duration, do not allow ., 47~3 the installations to be subsequently reused without all the wirings having been previously replaced. The destructive effect is further accentuated when extinction means such as the projection of sea water of immersion are used.
Not to mention the fluid conduits which supply compressed gas or hydraulic liquid to the remote equipment which is vital to maintain in operation. The supply pipes which are generally used are only very imperfectly protected from direct heat and their constitution is not designed to resist for a sufficiently long time a considerable rise in temperature.
It is an object of the coating according to the invention to overcome the previously described drawbacks, as with this coating, in fact, when a temperature of about 1000C is attained, the glass fires which come into its composition are converted into a gel which is presented in the form of a pasty foam which constitutes a continuous dielectric and thermal barrier which reinforces the insular lion and protection of the conductor or the conduit. After lowering of the temperature, this protective barrier is converted into a layer of glass-coated mica, due to the disappearance, by combustion, of the polytetrafluoroethylene.
More particularly, this invention provides an insulating coating comprising a first layer comprised of mica, a second layer comprised of polytetrafluoroethylene on said first layer and a third layer comprised of glass fabric on said second layer, said coating maintaining its dielectric and thermal properties between -200C and 1,000C, and being converted to a gel at high temperature, wherein said gel maintains insulating properties at such high temperature and upon cooling from such high temperatures.
In consequence, this coating conserves its in-sulfating characteristics and its tightness, even after destruction of the combustible elements which are included in its basic composition (PTFE); this conserves for the installation its operational value even after a fire. This particular feature is of capital importance for the remote control of nuclear reactors after an incident having brought about a considerable increase in temperature in the hot go -pa-part, and for maintaining in operation the equipment directly acting for the survival of persons or for continuing a mission, as is the case in particular in aeronautics, the navy, aerospati.al operations and on drilling platforms.
Moreover, this coating may be obtained by ribboning, which makes it possible to envisage use thereof as desired, to protect certain fluid conduits passing through particularly exposed zones.
This coating is mainly characterized in that it conserves its dielectric and thermal properties between -~00C and 1000C and in that it is converted into a gel which maintains the insulation at high--------------------~478 temperatures and ensures insulation and tightness during cooling.
It is constituted by a layer of mica, a glass fabric end a layer of polytetrafluorethylene (PTFE). The layer of mica is obtained by win-ding, in one or more layers, a ribbon constituted by a lass tire fabric impregnated with a binding agent supporting particles of mica; the layer of polytetrafluoroethylene which is superposed on the layer of mica, is obtained by winding in one or more layers or by extrusion;
the lass fabric which is superposed on the layer of polytetrafluorethylene is obtained by winding a ribbon or by weaving elementary fires directly above the preceding layer.
The layer of mica is turned towards the conductor or the mom-bier to be protected and this protection is completed by a polymerization of the polytetrafluorethylene which ensures adherence between the layers.
The ribbons, of which the thickness is 0.06 mm to 0.12 mm, are wound with overlapping, for example by 50%, so as to double the thickness of the layer.
The gel obtained a high temperature vitrifies during drop in temperature to constitute, with the particles of mica which coat the element to be protected, a dielectric, tight insulating coating connect tying all the components of the circulate.
his coating may be produced as desired, from a ribbon obtained by superposition and adhesion of the different layers of materials entering in the composition of the complex; this enables protection to be ensured of elements or components other than electrical conductors or reinforce-mint of the protection against fire of existing installations.
his coating is in two forms, depending on whether it is question of protecting a supple conductor, a rigid conductor, a connecting combo-next or an equipment of particular form.
In the case of conductors, the ideal solution consists in superpo-sing a ribbon of mica, a polytetrafluorethylene protection and a glass fabric.
In the case of insulation of elements other than wires, the solution consists in superposing a ribbon of mica, a glass fabric and a polytetrafluorethylene insulation.
Other characteristics end a Ivanta~es will appear in the following description of a coating made according to the invention, intended for to row Sheehan of electrical Jon l l lyres, Levine by Wily of Ryan ill example.
Protection, at manufacture, of the conductors is effected as lot lows:
- A ribbon constituted by a glass fire fabric impregnated with a binding agent, generally silicon, supports the particles of mica and is preferably wound so that the particles of mica are turned towards the conductor, in one or more layers.
- layer of polytetrafluorcthylene is obtained by winclin~, above the preceding layer, of a ribbon or by extrusion.
- glass fire fabric is superposed on the layer of polytetrafluor-ethylene by ribboning or weaving elementary fires directly around the conductor.
This protection is completed by a polymerization of to poultry fluorethylene, which is presented in the form of impregnation in the case ox the glass fabric or of the covering of the fires in the case of direct weaving, and of the continuous layer obtained by ribboning or by extrusion. The effect of this polymerization is to obtain the ache-fence of the two upper layers and a certain adherence of the layer of polytetrafluorethylene with the ribbon supporting the particles ox mica, when the latter are turned towards the conductor.
According to a variant, protection of the flexible conductors may be obtained by superposition of a ribbon of mica, as defined previous-lye of a glass fabric the form of a braid or a ribbon, and of an insular lion of polytetrafluorethylene obtained by ribboning or extrusion.
This protection is completed by a treatment of connection similar to that described in the preceding case.
Ribboning operations are effected with an overlapping chosen so that at all points of the periphery of the cable, there are one or more thicknesses of each of the ribbons of which the width and thickness are defined as a function of the diameter of the wire.
The mica is turned towards the conductor so as to facilitate the laying bare which precedes the connecting operations and to obtain go a film of mica coaled with glass altar solidification of the Mel obtained at very high temperature, in order to facilitate disconnection of the colonial! if nccss;lry.
Conversion of the coating, by heating to about 1000(~ than cooling, may be sought a priori on rigid installations on which a perfect tightness is necessary, in order for example to shelter the components coming within their constitution from an aggressive or damp ambience.
In fact, the coating of the conductors according to the invention may be extended, by ribboning, to the other elements of the circuit so that, after fusion and solidification of the coating, the whole of the installation is coated with glass continuously and consequently in tight manner.
The coating according to the invention is mainly intended ion protection against fire, of electrical conductors, fluid conduits, connecting components or equipment.
It is more particularly applied to the protection of the electrical control, illuminating or safety circuits in the nuclear, chemical, oil, aeronautic, naval and space industries.
Of course, the invention is not limited to the embodiments described liereinabove, from which other forms and other embodiments may be provided without dcpartin~ from the scope of the invention.
Claims (14)
1. An insulating coating comprising a first layer comprised of mica, a second layer comprised of polytetra-fluoroethylene on said first layer and a third layer com-prised of glass fabric on said second layer, said coating maintaining its dielectric and thermal properties between -200°C and 1,000°C, and being converted to a gel at high temperature, wherein said gel maintains insulating properties at such high temperature and upon cooling from such high temperatures.
2. An insulating coating according to Claim 1, wherein the first layer of mica is made by winding, in one or more layers, of ribbon comprised of a glass fiber fabric impregnated with a binding agent supporting particles of mica; wherein the second layer of polytetrafluoroethylene is obtained by winding of a ribbon in one or more layers or by extrusion;
and wherein the third layer of glass fabric is obtained by winding a ribbon or by weaving elementary fibers directly on the preceding layers.
and wherein the third layer of glass fabric is obtained by winding a ribbon or by weaving elementary fibers directly on the preceding layers.
3. An insulating coating according to Claim 1 or Claim 2, wherein the polytetrafluoroethylene is polymerized to ensure adherence between the layers.
4. An insulating coating according to Claim 2, wherein the ribbons are wound with adequate overlapping so as to modulate the thickness of the coating layer.
5. An insulating coating according to Claim 1 or Claim 2, wherein the thickness of the ribbons is from 0.06 mm. to 0.12 mm.
6. An insulating coating according to Claim 1, wherein the gel obtained at high temperature vitrifies during drop in temperature to constitute, with the particles of mica a dielectric and tight insulating coating connecting all the layers.
7. An insulated conductor comprising a conductor having an insulating coating thereon, said insulating coating comprising a first layer comprised of mica, a second layer comprised of polytetrafluoroethylene on said first layer and a third layer comprised of glass fabric on said second layer, said coating maintaining its dielectric and thermal properties between -200°C and 1,000°C, and being converted to a gel at high temperature, wherein said gel maintains insulating properties at such high temperature and upon cooling from such high temperature.
8. An insulated conductor according to Claim 7, wherein the first layer of mica is made by winding, in one or more layers, of ribbon comprised of a glass fiber fabric impregnated with a binding agent supporting particles of mica; wherein the second layer of polytetrafluoroethylene is obtained by winding of a ribbon in one or more layers or by extrusion; and wherein the third layer of glass fabric is obtained by winding a ribbon or by weaving elementary fibers directly on the preceding layer.
9. An insulated conductor according to Claim 7, wherein the third layer of glass fabric is impregnated with polytetrafluoroethylene.
10. An insulated conductor according to Claim 7, 8 or 9, wherein the polytetrafluoroethylene is polymerized to ensure adherence between said layers.
11. An insulated conductor according to Claim 8, wherein the ribbons are wound with adequate overlapping so as to modulate the thickness of the coating layer.
12. An insulated conductor according to Claim 8, wherein the thickness of the ribbons is from 0.06 to 0.12 mm.
13. An insulated conductor according to Claim 7, wherein the gel obtained at high temperature vitrifies during drop in temperature to constitute with particles of mica a dielectric and tight insulating coating connecting all the layers.
14. An insulated conductor according to Claim 7 or 8, wherein said coating is heated to a temperature to produce said gel and then cooled so as to provide said conductor, with a tight fitting insulating coating thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000441867A CA1204478A (en) | 1983-11-24 | 1983-11-24 | Insulating coating for fire proof electrical conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000441867A CA1204478A (en) | 1983-11-24 | 1983-11-24 | Insulating coating for fire proof electrical conductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1204478A true CA1204478A (en) | 1986-05-13 |
Family
ID=4126590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000441867A Expired CA1204478A (en) | 1983-11-24 | 1983-11-24 | Insulating coating for fire proof electrical conductor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1204478A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113215832A (en) * | 2021-05-28 | 2021-08-06 | 扬州腾飞电缆电器材料有限公司 | Anti-fracture flame-retardant fireproof wrapping tape and preparation method thereof |
-
1983
- 1983-11-24 CA CA000441867A patent/CA1204478A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113215832A (en) * | 2021-05-28 | 2021-08-06 | 扬州腾飞电缆电器材料有限公司 | Anti-fracture flame-retardant fireproof wrapping tape and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4806416A (en) | Insulating coating | |
| FI87832C (en) | SKYDDSHOELJE MOT YTTRE VAERME- OCH ELDPAOVERKAN FOER STRAENGFORMIGA VAROR SAMT SAETT FOER FRAMSTAELLNING AV ETT SKYDDSHOELJE | |
| US3692924A (en) | Nonflammable electrical cable | |
| EP0203129B1 (en) | Fire-proof flexible insulating coating for conduits, wires, electric cables and optical fibres | |
| US4595793A (en) | Flame-resistant plenum cable and methods of making | |
| GB2130459A (en) | A flexible electrical heating or temperature measuring element | |
| US2800524A (en) | Electric cable | |
| KR20120002817A (en) | Fire resistant cable | |
| JP2648343B2 (en) | communication cable | |
| CA1204478A (en) | Insulating coating for fire proof electrical conductor | |
| EP0151179B1 (en) | Flame-resistant plenum cable and methods of making | |
| US4835054A (en) | Intumescent protective covering for electrical cables | |
| US6720498B2 (en) | Electrical line | |
| CN211089101U (en) | High-temperature-resistant flexible fireproof cable intermediate joint | |
| JPS62154505A (en) | Fire resistant flexible insulating covering for pipe, wire, cable and optical fiber | |
| US2863032A (en) | Flexible glass insulated heater wire | |
| CN208368204U (en) | A kind of organic fire prevention flexible cable | |
| CN208538539U (en) | A kind of new structure controllable high-temperature-resgelant cable | |
| GB2161655A (en) | Protector means for a cable | |
| KR20140093362A (en) | Radiationproof and Noncombustible Temperature wire | |
| CN210667880U (en) | Flexible mineral insulation fireproof cable | |
| US5309539A (en) | Communication cable | |
| CN212570490U (en) | High temperature resistant flame retarded cable structure | |
| CN219349848U (en) | Power cable for energy storage equipment | |
| CN219143854U (en) | Environment-friendly medium-voltage flame-retardant fire-resistant cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |