4.3 Requirements for the cable handling system
Cable system overview
When the pump is installed in a discharge tube, it is critically important that a correct cable
support and protection system is used. Correct cable support is especially important with
long cables and closed discharge tubes. Due to the complexity of designing cable support, it
is highly recommended to use the Flygt Lift and Cable Handling System. The Flygt system
provides spring-controlled tensioning and an integrated guide wire system.
If the cables are supported by another system, then the cable support system must have the
following characteristics:
• Cables must be supported in such a way, that they do not come in contact with any hard
surface which could abrade the cable sheathing. Examples of surfaces include pump and
tube components, lifting cables or wires and any other hardware.
• Cables should be bundled together, by using components that do not cut or abrade the
cables.
• Correct strain relief and support at prescribed intervals must be provided.
Consequence of an inadequate cable support
The movement of the cable due to inadequate cable support can cause the signal leads to
fail. The failure of the signal leads indicates that the other parts of the cable are vulnerable to
damage. Continuing to operate the product can result in a hazardous situation. For a safe
operation, the cable must be replaced and the support for the cable must be enhanced.
The Flygt Lift & Cable Handling System
The following figure shows major parts of the optional Flygt Lift & Cable Handling System,
designed for this pump.
4 Installation
P7030, P7035, P7040 Installation, Operation, and Maintenance Manual
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