Page 215 - The ROV Manual - A User Guide for Remotely Operated Vehicles 2nd edition

204 CHAPTER 8 Cables and Connectors
Example steel wire stength member
Optical fibers, 3:
Corning NexCor optical fiber 245-micron UV-acrylate buffer on each-w-200-kpsi proof-test Attenuation in completed cable <= 1.5 dB/kmat 131020nm & any point losses <= 0.2 dB
304 SS Tubing:
gel filled & laser welded around the optical fibers
Inner coax circuit:
24 strands #34 AWG tin-plated copper wires helixed around SS tube DC resistance at 20oC: <= 12.5 Ω/1000 ft 0.014" polypropylene rated at 700 V DC
Outer coax circuit:
42 strands #34 AWG tin-plated copper wires helixed around PP Ins DC resistance at 20oC: <= 7.5 Ω/1000 ft 0.021" polypropylene rated at 700 V DC
FIGURE 8.47
Steel wire strength member.
• Near neutrally buoyant (Figure 8.49)
• Positively buoyant (floats) (Figure 8.50)
• Water-sampling tow-cable
Standard cables include:
• CAT-5, CAT-5e, CAT-6, etc.
• Coax components:
 50 or 75 Ω characteristic impedance
 30 or 20 pF per foot capacitance
 MIL-SPEC coaxes per MIL-C-17
Nitronic-50 armor wires: 24 × 0.047” at 3.4" LH Lay 36 × 0.037" at 3.7" LH Lay
Cable core jacket: 0.030" polyurethane
Polyester binder tape
Cable core void filling: depolymerized rubber
Power Conductors, 8:
#22 (19 × .0063") tin-copper DC resistance at 20oC:
<= 17 Ω/1000–ft
0.021" nominal wall cross-linked polyethylene rated at 1500 vrms
Overall diameter = 0.510 +/– 0.010 " Cable length = 1340 +/– 10 ft
Weight in air = 361 lb/1000 ft nom Weight in sea = 283 lb/1000 ft nom Long-term working load = 3200 lb max Short-term working load = 6200 lb max Breaking strength = 19,000 lb min Minimum bend diameter = 21 "
(Courtesy Falmat.)
FLAMAS CABLE