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Strain type insulator arc used where the conductors are
Dead ended
At intermediate anchor towers
Any of the above
None of the above
Dead ended
Strain type insulators are designed to handle the high mechanical tension exerted by transmission line conductors. They are essential at locations where the line terminates or changes direction to maintain mechanical stability and provide electrical insulation.
Strain type insulators are designed to handle the high mechanical tension exerted by transmission line conductors. They are essential at locations where the line terminates or changes direction to maintain mechanical stability and provide electrical insulation.
TmaxтАЛ=╧ГтЛЕA тАФ where TmaxтАЛ is the maximum mechanical tension, ╧Г is the permissible stress, and A is the conductor cross-section.
The strain insulator consists of an assembly of porcelain or glass discs connected in series, arranged horizontally or at an angle to the line of pull. By distributing mechanical stress across multiple units, they prevent conductor snapping while maintaining necessary clearance from the grounded tower structure.
Used in long straight runs to provide anchor points every few kilometers.
Essential at dead-end towers (line termination).
Installed at sharp corners or angles where line tension is redirected.
Consists of a string of disc insulators placed in a horizontal position.
High mechanical strength to withstand heavy conductor tension.
Modular design allows replacement of individual damaged discs.
Heavier and more complex to install than pin insulators.
Requires more physical space due to horizontal mounting.
Dead-end points of transmission lines.
Corners and sharp bends in routes.
River crossings and long spans where tension is extreme.
For low voltage lines, shackle insulators may be used as strain insulators.
Option A is correct as dead-ended conductors impose maximum tension.
Option B is correct because intermediate anchor towers balance the mechanical stress of long line segments.
C is correct тАФ Strain insulators are versatile components used wherever the conductor undergoes a change in direction, ends, or requires mechanical anchorage.
Always remember: Pin insulators are for support, whereas strain insulators are for tension management.