IEEE Std 1017.3:2021 pdf free download – IEEE Recommended Practice for Specifying Electric Submersible PumpCable – Polypropylene Insulation
5.2 Gas blockage for stranded conductors
A 30 cm (12 in) specimen of insulated conductor removed from finished cable should be subjected to a0.03 MPa(5 psi) differential air pressure for a period of l h at 25 °C(77 °F).The sample ends should be cutoff flush with a fine-toothed saw blade, and one end of the sample should have a short section of clear flexibleplastic tubing slid over the insulation to enable the specimen to be pressurized.The tubing should be attachedin place with a small hose clamp [minimum width of binding collar equals 6.4 mm (0.250 in)].The clampshould be tightened with minimum torque to prevent leakage.The opposite end of the sample should be leftsubmerged in water.No air bubbles should be detected at the submerged end of the cable during the test period.
5.3 Construction
The insulation should be extruded on the conductor with thicknesses as specified in 5.3.1 and 5.3.2.5.3.1 Cables without metallic barrier
For 3 kV rated cable, average insulation wall thickness should be 1.9 mm (0.075 in) or more.The insulationminimum wall thickness should not be less than 1.7 mm (0.068 in) at any point.For 5 kV rated cable, theinsulation average wall thickness should be 2.3 mm (0.090 in) or more. The insulation minimum wallthickness should not be less than 2.1 mm(0.081 in) at any point. For 8 kV rated cable, the insulation averagewall thickness should be 2.92 mm (115 mil). The insulation wall thickness should not be less than 2.63 mm(0.104 in) at any point.
5.3.2 Cables with metallic barrier
For 5 kV rated cable, the insulation average wall thickness should be 1.9 mm (0.075 in) or more.The insulationminimum wall thickness should not be less than 1.7 mm (0.068 in) at any point. For 8 kV rated systems,average wall thickness should be 2.29 mm(90 mil) or more.The insulation minimum wall thickness shouldnot be less than 2.06 mm(0.081 in).Considerations other than voltage stress impact the thickness of insulation.
7.2.3.2 Flat cable with metallic (nonlead) barrier
Nonlead metal barriers may be composed of various nonmagnetic metals or alloys (e.g.，Monel,stainless steel, or Inconel), and are applied over and in direct contact with the insulation by a seam-weldedprocess. The metallic barriers should be applied to the individually insulated conductors by forming a coldrolled strip of metal into a tubular configuration around an insulated conductor and performing alongitudinal seam weld. The sheath is seam-welded to an inside diameter larger than that of the insulatedconductor, to protect the latter from the heat generated by the welding operation. It is then cold drawn tofinal size in contact with，and slightly compressing, the insulation of the insulated conductor.No air gapshould be present between the surface of the insulation and the metallic barrier.
7.2.3.3 Flat cable with metallic (nonlead) barrier with encapsulating jacket
Each insulated conductor should have a seam-welded tube applied in accordance with 7.2.3.2 and witha thickness as defined in 6.3. The three conductors should be arranged in a flat configuration withmaintained equal spacing， and an extruded encapsulating jacket applied. Jacket materials，as thosesuggested for harsh environments in 6.1, should be used. Encapsulating jackets should comply with therequirements of IEEE Std 1017.1 TM [B7]. The minimum jacket thickness at any point should be 2 mm (0.080in). These cables typically rely on the encapsulating jacket to provide the mechanical protectioncharacteristics otherwise provided by metallic armor.