Cable Terminations and Transmission Lines

A poorly made cable termination is one of the most common causes of a fault that only shows up years later.

The risk at the cut point

Terminating and jointing HV and MV cables has to restore an even electric field distribution at every point where the insulation is cut. A job done wrong lets the electric field concentrate at the cut point, which leads to insulation breakdown over time.

Cable Terminations and Transmission Lines

What's Included

HV and MV cable termination assembly
Heat-shrink and cold-shrink type selection
Cable jointing
Transmission line route planning
Cable thermal resistance and spacing calculation
Insulation resistance and partial discharge testing

Direct burial

This is the most economical laying method, but it can't be used at road crossings or along routes where digging isn't possible.

Horizontal directional drilling (HDD)

This is the preferred method along routes where digging isn't possible; the upfront cost is higher.

A single assembly error in a cable termination can surface years later as an insulation breakdown.

Frequently Asked Questions

What is the difference between heat-shrink and cold-shrink terminations?

Heat-shrink is the more economical option, while cold-shrink gives a more reliable result in environments with high moisture or dust exposure.

Why does partial discharge testing matter?

It catches assembly defects that aren't visible to the eye before energization, preventing faults that would otherwise show up later.

Do cables laid in parallel affect each other?

Yes, groups of cables laid close together raise each other's temperature and can reduce carrying capacity, which is why a spacing calculation is done.

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