HPFF vs Solid dielectric cable
HPFF vs Solid dielectric cable
(OP)
What, if any advantage do HPFF cables have over solid dielectric cables? 115 through 345kv.
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HPFF vs Solid dielectric cable
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RE: HPFF vs Solid dielectric cable
http://okonite.com/okonite-wire-and-cable-product-...
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: HPFF vs Solid dielectric cable
RE: HPFF vs Solid dielectric cable
I thought the comparison chart may be useful in that it gives you some questions to ask and verify independently.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: HPFF vs Solid dielectric cable
RE: HPFF vs Solid dielectric cable
Most utility today prefer XLPE because the environment concern with potential oil spill. If oil filled cable need to be used, most utility prefer HPFF because the minimum space required, better mechanical protection and potential to cool the oil and control the line capacity.
For submarine application, the majority of the oil cable used is SCFF. If there is chance to direct burying the cable, or the phase have to be segregated for installation or safety reasons, SCFF have a chance to be used since its ampacity performance are better than the HPFF as shown in the graph below
RE: HPFF vs Solid dielectric cable
1. Loss of electric supply results in dropping pressure. This can increase restoration time in that power must first be applied to the substation from an external source.
2. Fault finding and repair appears far more difficult. I'd rather skip all the extras needed. Here is a good blog on that:
http://hackaday.com/2015/07/27/find-and-repair-a-2...
RE: HPFF vs Solid dielectric cable
Si duri puer ingeni videtur,
preconem facias vel architectum.
RE: HPFF vs Solid dielectric cable
HPFF have some significant drawbacks if compared to solid insulation, the most significant being cost and environmental issues.
Si duri puer ingeni videtur,
preconem facias vel architectum.
RE: HPFF vs Solid dielectric cable
I see it much the same way with HPFF. While I have some sense, would you happen to know how reactance, capcitance, and surge impedance differs in solid dielectric cables vs HPFF?
RE: HPFF vs Solid dielectric cable
Yes, SCFF is self containerd fluid filled.
For the same voltage and cross-section, the capacitance of a solid insulated cable is generally lower if compared to HPFF due to the lower permittivity of XPLE if compared to paper-oil insulation. The surge impedance thus is generally higher in XLPE cables.
SCFF cables can use paper oil insulation (in this case their capacitance is almost the same of HPFF ones) or mixer Paper-Polypropylene Laminated (PPL) insulation; in the latter case their capacitance is lower if compared to HPFF but still somewhat higher than XLPE ones.
Si duri puer ingeni videtur,
preconem facias vel architectum.
RE: HPFF vs Solid dielectric cable