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If you have a question regarding coaxial, telephone, and building wire, power cable, insulation, extrusion, bunching, stranding, braiding, etc. post it here.

TOPIC: Cure value of cv cure xlpe cores

Cure value of cv cure xlpe cores 2 years 11 months ago #223

Can any one suggest how one can improve upon the hot set value(percentage elongation) of cured XLPE cores which fall on the borderline?
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Re: Cure value of cv cure xlpe cores 2 years 11 months ago #224

Hello,

Please carefully read this WAI forums thread especially Sahota's response:
www.wirenet.org/forum/viewmessages.cfm?Forum=8&Topic=657

Thank you.

Regards
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
519 641- 3212
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Re: Cure value of cv cure xlpe cores 2 years 11 months ago #225

Dear Peter,

I think I have not expressed myself correctly. What I meant was I HAVE ALREADY PRODUCED A FEW KILOMETERS OF CORE WHEREIN I AM GETTING HOT SET VALUES AROUND 175% to 180%-may be the preheater failed...is there any process by which I can improve these values to around 110% to 125% ?

With kindest regards,
R.C.Jhalani
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Re: Cure value of cv cure xlpe cores 2 years 11 months ago #226

From the comment it seem that you are talking about CV cured cores. In mean peroxide cure cables, the relation is very critical in between the temperature and half life of peroxide.

When we using pre-heater, we are actually supplying heat internally or in other words we are keeping the material and external heat for activating the peroxide breakdown. As the process was activated but remained uncompleted due to insufficient heat sum because of pre-heater trip, you keep the insulated core in some hot environment or as it is for some days. You will find the improvement.

You can use degassing chambers for this purpose.
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Re: Cure value of cv cure xlpe cores 2 years 11 months ago #227

Thanks
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