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Topic Title: CU/XLPE/SWA cable sizing - Volt drop Topic Summary: Created On: 06 March 2013 12:35 PM Status: Post and Reply |
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 06 March 2013 12:35 PM
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Hi there
I'm currently looking at using a 35mm² 4-core CU/XLPE/SWA. using table 4E4A from BS7671 this is acceptable as the max current capacity in the book is 115A. Currently i have the following loads on each phase L1 = 50A L2 = 50A L3 = 70A Now the cable length is to be 110m buried in the ground via duct. I've looked into the volt drop, but what i'm after is to determine the volt drop taking into account operating temperature, and PF @0.9. Can anyone help me? |
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06 March 2013 12:46 PM
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Have you looked at Appendix 4, section 6 et seq yet ?
Regards OMS ------------------------- Failure is always an option |
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06 March 2013 02:05 PM
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Hi there
I worked out everything except sin ø. I know my PF is 0.9 which is my cos ø, can you remind me how this is calculated? |
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06 March 2013 02:40 PM
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Cos angle theta = 0.9
angle theta = Cos^-1 = 25.85 degrees Sin angle theta = 0.435 Regards OMS ------------------------- Failure is always an option |
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CU/XLPE/SWA cable sizing - Volt drop
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