Abstract
Composite hollow core insulators (referred to hereinafter as HCI for short) are used primarily as housings for various high-voltage equipment and apparatus. Owing to their conditions for use, they primarily have to withstand bending and compression loads and since a large number of the electrical equipment are gas insulated (with SF6 and SF6 gas mixtures), they are also subject to internal pressure. Today, if the user so desires, it is possible to design complete substations in silicone composite technology.
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Abbreviations
- 2D:
-
Two-dimensional
- 3D:
-
Three-dimensional
- CIGRE:
-
Conseil International des Grands Réseaux Électriques (International Council on Large Electric Systems)
- DMS:
-
Strain gauge
- FEM:
-
Finite element method
- FRP:
-
Fibre reinforced plastic
- IEC:
-
International electrotechnical commission
- LVDT:
-
Linear variable differential transformer
- MML:
-
Maximum mechanical load
- VHI:
-
Composite hollow core insulator
- MSP:
-
Maximum specified pressure
- O-ring:
-
O-ring (seal/gasket)
- SF6:
-
Sulphur hexafluoride (insulating gas)
- SIP:
-
Specified internal pressure
- SML:
-
Specified mechanical load
- VPE:
-
Cross-linked polyethylene (insulating material for cables)
- ZnO:
-
Zinc oxide (material of the varistors for lightning arresters)
- 1, 2, 3:
-
Subscripts related to the fibre direction and to the two orthogonal directions thereto
- νi,j:
-
Poisson number (for FRP tube, aluminium, glue, epoxy resin)
- σb:
-
Bending stress
- σrz:
-
Shear stress at the interface between tube and end fitting
- d :
-
Tube inner diameter
- D :
-
Tube outer diameter
- E :
-
Average modulus of elasticity of the FRP tube
- E i :
-
Modulus of elasticity (Young’s modulus) (for FRP tube, aluminium, glue, epoxy resin)
- G i, j :
-
Shear modulus (for FRP tube, aluminium, glue, epoxy resin)
- F, Fb:
-
Bending load
- l :
-
Lever arm from the point of the load application to the mouth of the metal end fitting
- M b :
-
External bending moment
- W :
-
Section modulus of the tube
- t :
-
Time
- z :
-
Coordinate in the axial direction of the FRP tube
References
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© 2013 Springer-Verlag Berlin Heidelberg
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Papailiou, K., Schmuck, F. (2013). Composite Hollow Core Insulators. In: Silicone Composite Insulators. Power Systems. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-15320-4_6
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DOI: https://doi.org/10.1007/978-3-642-15320-4_6
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-15319-8
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