Page 191 - The ROV Manual - A User Guide for Remotely Operated Vehicles 2nd edition
P. 191
180 CHAPTER 8 Cables and Connectors
FIGURE 8.27
(a) The molded connector (above left) has little strain relief and subsequently prone to wire breakage behind the connector body. The lower molded connector distributes the load over a greater length, resulting in longer service life. (b) Polyurethane-molded boot provides strain relief for any size cable.
FIGURE 8.28
Cable gland with strain relief.
Lubrication
(Courtesy Strantech.)
(a) (Courtesy SeaTrepid.) (b) (Courtesy Ocean Innovations.)
Lubrication is needed for O-rings and rubber surfaces. While opinions vary, the authors recom- mend the use of silicone grease such as Dow Corning DC-4 or DC-111 for the O-ring and 3M Food Grade Silicone Spray Lubricant for the connector body. Food grade silicone spray (Figure 8.29) is important as the propellants are noncorrosive.
Dry versus wet mate connectors
• Dry mate connectors must be mated in a dry environment before they are deployed.
• Underwater mateable/pluggables can be mated or demated underwater but with power off.
