Prerequisites
In order to do this task, the following prerequisites must be met.
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All relevant work instructions, procedures and standards must be available. |
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The mounting ring has been installed. |
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The steel conduit is mounted with all installation work finalized. |
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All relevant drawings have been approved by the classification society. |
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All relevant personnel (skilled shipyard workers, ship electricians) and their tools must be available. |
You must be equipped with a standard set of tools. This tool set must comprise the normal tools for electronic and electromechanical tasks, such as screwdrivers, pliers, spanners,
a cable stripper etc. Each tool must be provided in various sizes. We recommend that all tools are demagnetized to protect your equipment.
The following tools and consumables are required.
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Fish tape (wire pulling tool) with suitable length |
Context
All necessary precautions must be made to avoid damage to the cables while pulling them through the steel conduit.
NoteMake sure that all welding has been finalized before you pull the cables through the steel conduit. Heat may cause serious
damage to the cables and the transducer.
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Allow the transducer cables to move freely when the drop keel moves up and down. The cables can be placed inside or outside the drop keel depending on the keel design. |
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Secure the cables here. |
The transducer cables must be properly fastened at the bottom of the drop keel, and fully supported while lowering and hoisting the drop
keel. Proper arrangements must be made to handle the cable slack when the drop keel is in its upper position. Depending on the drop keel design, the cable slack can be kept on the outside of the drop keel, or inside it.
The cables must be permitted to move freely when the drop keel is lowered and hoisted. It is important to avoid sharp edges or protruding elements, as these may cause damage to the cables. Observe the limitations for the cable minimum bending radius. Any damage to a cable may cause water ingression. Water follows the cable cores into the transducer, and causes damage that can not be repaired.
NoteWherever the cables are unprotected outside the drop keel, use a flexible conduit for protection.