GB2085238A - Electrical power cable installations - Google Patents

Electrical power cable installations Download PDF

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Publication number
GB2085238A
GB2085238A GB8130858A GB8130858A GB2085238A GB 2085238 A GB2085238 A GB 2085238A GB 8130858 A GB8130858 A GB 8130858A GB 8130858 A GB8130858 A GB 8130858A GB 2085238 A GB2085238 A GB 2085238A
Authority
GB
United Kingdom
Prior art keywords
cable
installation
cables
wall members
power cable
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.)
Granted
Application number
GB8130858A
Other versions
GB2085238B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Balfour Beatty PLC
Original Assignee
BICC PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BICC PLC filed Critical BICC PLC
Priority to GB8130858A priority Critical patent/GB2085238B/en
Publication of GB2085238A publication Critical patent/GB2085238A/en
Application granted granted Critical
Publication of GB2085238B publication Critical patent/GB2085238B/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/10—Cooling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/03—Cooling

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Abstract

In an electric power cable installation in which the cables 1 are installed in the air or a gas in a horizontal or only moderately inclined position, convective cooling is improved by providing walls 2 spaced one on each side of the cable or cables so as to form a draught space. The walls are plastics or aluminium hyperbolic sheets. Telecommunication cables present in the installation are located below the power cables. <IMAGE>

Description

SPECIFICATION Electric power cable installations This invention relates to electric power cable installations in which at least one power cable is installed in the air (or another gas), whether in the open atmosphere or in a building, tunnel or other enclosed air space.
The object of the invention is to increase the effectiveness of convective cooling and thereby increase the amount of power that can be safely transmitted through the cable.
In accordance with the invention, an electric power cable installation includes at least one cable installed in the air in a horizontal or moderately inclined position and a pair of wall members spaced one on each side of the cable or cables so as to form a draught space containing the cable or cables and open above and below.
In this way the heat dissipated by the cables produces an updraught in the draught space by the chimney effect leading to greater convective heat loss than in open airspace.
Normally the wall members will be imperforate or nearly so; they may for example be of thin sheet metal or of stiff plastics sheet material. Normally they will be spaced from the cable or cables and extend continuously, or nearly so, from end to end of the installation.
Preferably the wall members are shaped to provide a waisted shape for the draught space; a hyperbolic curve is considered ideal as providing a considerable Venturi effect.
When there is more than one cable, they are preferably supported one above the other in a vertical array; a preferred form of support is described in the specifications of our Patents Nos.
1580213 and 1580214. When the installation includes communication, signalling or control cables, they are preferably arranged below the power cables to minimise heating from them.
The accompanying drawing is an isometric sketch of a portion of a power cable installation in accordance with the invention.
A number of power cables 1 are arranged vertically one above the other on suitable supports (not shown) such as those described in the specification of Patent No. 1580213. A pair of wall members 2 formed from aluminium sheet curved to form a hyperbolic passage-way between them complete the installation.
1. An electric power cable installation including at least one cable installed in the air in a horizontal or moderately inclined position and a pair of wall members spaced one on each side of the cable or cables so as to form a draught space containing the cable or cables and open above and below.
2. An installation as claimed in Claim 1 in which the wall members are imperforate.
3. An installation as claimed in Claim 1 or Claim 2 in which the wall members are of thin sheet metal.
4. An installation as claimed in Claim 1 or Claim: in which the wall members are of stiff plastics sheet material.
5. An installation as claimed in any one of the preceding claims in which the wall members are spaced to provide a waisted shape for the draught space.
6. An installation as claimed in Claim 6 in which the draught space is hyperbolic.
7. An electric power cable installation substantially as described with reference to the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Electric power cable installations This invention relates to electric power cable installations in which at least one power cable is installed in the air (or another gas), whether in the open atmosphere or in a building, tunnel or other enclosed air space. The object of the invention is to increase the effectiveness of convective cooling and thereby increase the amount of power that can be safely transmitted through the cable. In accordance with the invention, an electric power cable installation includes at least one cable installed in the air in a horizontal or moderately inclined position and a pair of wall members spaced one on each side of the cable or cables so as to form a draught space containing the cable or cables and open above and below. In this way the heat dissipated by the cables produces an updraught in the draught space by the chimney effect leading to greater convective heat loss than in open airspace. Normally the wall members will be imperforate or nearly so; they may for example be of thin sheet metal or of stiff plastics sheet material. Normally they will be spaced from the cable or cables and extend continuously, or nearly so, from end to end of the installation. Preferably the wall members are shaped to provide a waisted shape for the draught space; a hyperbolic curve is considered ideal as providing a considerable Venturi effect. When there is more than one cable, they are preferably supported one above the other in a vertical array; a preferred form of support is described in the specifications of our Patents Nos. 1580213 and 1580214. When the installation includes communication, signalling or control cables, they are preferably arranged below the power cables to minimise heating from them. The accompanying drawing is an isometric sketch of a portion of a power cable installation in accordance with the invention. A number of power cables 1 are arranged vertically one above the other on suitable supports (not shown) such as those described in the specification of Patent No. 1580213. A pair of wall members 2 formed from aluminium sheet curved to form a hyperbolic passage-way between them complete the installation. CLAIMS
1. An electric power cable installation including at least one cable installed in the air in a horizontal or moderately inclined position and a pair of wall members spaced one on each side of the cable or cables so as to form a draught space containing the cable or cables and open above and below.
2. An installation as claimed in Claim 1 in which the wall members are imperforate.
3. An installation as claimed in Claim 1 or Claim 2 in which the wall members are of thin sheet metal.
4. An installation as claimed in Claim 1 or Claim: in which the wall members are of stiff plastics sheet material.
5. An installation as claimed in any one of the preceding claims in which the wall members are spaced to provide a waisted shape for the draught space.
6. An installation as claimed in Claim 6 in which the draught space is hyperbolic.
7. An electric power cable installation substantially as described with reference to the accompanying drawings.
GB8130858A 1980-10-14 1981-10-13 Electric power cable installations Expired GB2085238B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8130858A GB2085238B (en) 1980-10-14 1981-10-13 Electric power cable installations

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8033138 1980-10-14
GB8130858A GB2085238B (en) 1980-10-14 1981-10-13 Electric power cable installations

Publications (2)

Publication Number Publication Date
GB2085238A true GB2085238A (en) 1982-04-21
GB2085238B GB2085238B (en) 1984-08-08

Family

ID=26277215

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8130858A Expired GB2085238B (en) 1980-10-14 1981-10-13 Electric power cable installations

Country Status (1)

Country Link
GB (1) GB2085238B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1507323A1 (en) * 2003-08-13 2005-02-16 Abb Research Ltd. Enclosed switchgear with heat-dissipating elements
WO2008098866A3 (en) * 2007-02-16 2008-11-13 Siemens Ag Electric energy transfer device comprising an enclosed housing
EP2983258A1 (en) * 2014-08-08 2016-02-10 General Electric Company Electrical equipment and a method of manufacturing

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1507323A1 (en) * 2003-08-13 2005-02-16 Abb Research Ltd. Enclosed switchgear with heat-dissipating elements
US7272003B2 (en) 2003-08-13 2007-09-18 Abb Research Ltd Encapsulated switching devices having heat emission elements
CN1581618B (en) * 2003-08-13 2010-05-26 Abb研究有限公司 Switch device and radiation board for the device
WO2008098866A3 (en) * 2007-02-16 2008-11-13 Siemens Ag Electric energy transfer device comprising an enclosed housing
EP2983258A1 (en) * 2014-08-08 2016-02-10 General Electric Company Electrical equipment and a method of manufacturing
CN105392325A (en) * 2014-08-08 2016-03-09 通用电气公司 Electrical equipment and manufacturing method
US9622374B2 (en) 2014-08-08 2017-04-11 General Electric Company Electrical equipment and a method of manufacturing
CN105392325B (en) * 2014-08-08 2020-01-21 Abb瑞士股份有限公司 Electrical device and method of manufacture

Also Published As

Publication number Publication date
GB2085238B (en) 1984-08-08

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee