Prerequisites
Before you can do this task, the following prerequisites must be met:
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The SU90 system is turned off. |
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The circuit breaker for the 3-phase AC power is closed. AC power is connected. |
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The transducer is in its upper position with the Upper Limit Switch (S304) activated. |
You must be equipped with a standard set of tools. This tool set must comprise the normal tools for electronic and electromechanical tasks. Each tool must be provided in various sizes. We recommend that all tools are demagnetized to protect your equipment.
Context
This task serves two purposes.
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You will verify that the transducer can be lowered and hoisted with local control. |
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You will find the best way to secure the transducer cable so that it moves freely during lowering and hoisting. |
WARNINGHigh voltages are used. This equipment must be serviced only by qualified personnel familiar with the construction and operation of the SU90 system, as well as the potential hazards involved. Failure to observe this precaution could result in bodily injury.
Procedure
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1 |
Make sure that you have sufficient water depth below the keel before you lower the transducer. |
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Locate the hand crank inside the Motor Control Unit. Remove the hand crank from its storage position. |
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Locate the Motor Protecting Switch (S301). Press the operating handle upwards to position ON. |
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Locate the Hoist/Lower Switch (S302). Set the switch to position LOWER. |
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Locate the Hand Crank Safety Switch (S303). |
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Check the training direction of the hoisting motor by very briefly pressing the Hand Crank Safety Switch (S303). |
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If the transducer was hoisted:
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To disconnect power, disengage the circuit breaker for the 3-phase AC voltage. |
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Remove the cover on the power connections terminal box on the hoisting motor. |
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Reverse two of the three 3-phase cable connections. |
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To apply power, close the circuit breaker for the 3-phase AC voltage. |
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Check the training direction of the hoisting motor by very briefly pressing the Hand Crank Safety Switch (S303). |
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Locate the Hoist/Lower Switch (S302). Set the switch to position STOP. |
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Put the hand crank back to its storage position in the Motor Control Unit. |
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Make sure that you have sufficient water depth below the keel before you lower the transducer. |
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Make sure that the transducer cables can move freely when the transducer is lowered and hoisted. |
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Locate the Hoist/Lower Switch (S302). Set the switch to position LOWER.
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Lowering is automatically stopped when the Lower Limit Switch is activated. |
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If necessary, the transducer can be stopped in any position by setting the Hoist/Lower Switch to STOP. |
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Locate the Hoist/Lower Switch (S302). Set the switch to position HOIST.
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Hoisting is automatically stopped when the Upper Limit Switch is activated. |
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If necessary, the transducer can be stopped in any position by setting the Hoist/Lower Switch to STOP. |
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Repeat the hoist and lower operations to find the best way of securing the transducer cable. |
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Locate the Hoist/Lower Switch (S302). Set the switch to position STOP. |
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Locate the Motor Protecting Switch (S301). Press the operating handle down to position OFF. |
Result
Requirements |
Results |
The lowering and hoisting functionality is operational. |
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The transducer cable moves freely during lowering and hoisting. |
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The transducer cable is secured. |
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Date and signature: |