Electrical Stress Control In Cable Joints And Terminations

Today we overview chapter 7 stress control in polymeric medium voltage cable accessories. The book covers the installation of medium voltage cable terminations separable connectors cable joints and associated lv mv hv power cable accessories such as cable glands lugs and cable cleats. This is why all mv joints and terminations have stress control components whose function is to reduce the electric stress at the screen edge and other positions of high stress to acceptable levels.

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Conclusion hopefully this clarifies some of the cable jointers questions.

Electrical stress control in cable joints and terminations.

Traditional geometric stress cone. The following information has been republished with kind permission of 3m electrical. It doesn t matter the type of cable or manufacturer the. Sometimes some types of cable splices can be a back to back cable termination like the stop joint pictures i showed in a previous post.

This method reduces the electrical stress at the shield discontinuity by extending the shield and gradually increasing the thickness of insulation under the shield. Figure 55 shows the stress control method used from the earliest days of cable accessory development. Another common method is heat shrinkable stress control tubing that is used to control high electrical stresses at insulation screen terminating point in medium voltage plastic and paper insulated cable joints and terminations up to 36 kv. Choosing cable terminations to reduce electrical stress.

This is a stress cone which. Control and dissipate electrical stress through deflection.

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