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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: 22KV distribution cables

22KV distribution cables 2 years 6 months ago #403

Please advise how to determine the size of 22KV power cables?
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Re: 22KV distribution cables 2 years 6 months ago #404

Hello Francis;

After noting where you live, we are pretty much at a loss as to the standards used by your country. They may be English. First check with the technical people at your local hydro company(s) and find out what specifications are used. Then locate and purchase those specifications. There also will be various qualification tests that must be submitted for approval to verify your manufacturing ability.

Regards
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
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Re: 22KV distribution cables 2 years 6 months ago #405

Hi Peter,

Singapore follow the IEC60502-2:2005 standard for power cables. I understand we need to know the impedence of the transformer to size the 22KV cable correctly. Perhaps you could advise me what are the formula.

Cheers

Francis
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Re: 22KV distribution cables 2 years 6 months ago #406

Hello again Francis;

Sizing power cables to connect to existing or planned transformers (primary side) is the responsibility of the local hydro engineering design group. They will not let anybody else do those calculations for them.

Cable sizing and supply and supply of the proper fused disconnects (secondary side) (Two fused disconnects - One at the transformer and one at main distribution panel inside the building.) are the responsibility of the electrical consulting engineer for that building and the sizing calculations are usually checked by the transformer manufacturer or perhaps by the owner of the transformer if it belongs to the local hydro. (All to ensure the transformer is properly protected as well as the building!)

If you want to get more information on this subject, I suggest you contact the electrical engineering department of your local university.

Kindest regards
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
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Re: 22KV distribution cables 2 years 6 months ago #407

Hi Vettecoupe

Thanks and noted

Francis
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