Subsea SWL capacity can be increased by compensator systems.ģ phase 440 V, 60 HZ, 1194 amp 728 kW required.Ĭondition (upgraded and totally rebuilt in 2003): Winch hoist system is equipped with a Variable Constant Tension System. Lift Height with 8 fall/620 m, with 2 fall/2620 m The crane can also perform sealifts (subsea construction) with 400 Te SWL at 600 m depth and e.g. SWL capacity with short boom and 100% Counterweight:Ĭurrent SWL capacity with Main Hoist and long boom (rigged up as shown on pictures): SWL capacity with short boom and 0% Counterweight:ġ0 Te / 13.6 - 45.6 m radius (aux. Main winch has wire rope capacity of 2 x 2900 m wire x 40 mm diameter Ø. operation radius is 56 m with long boom aux. SWL 200 Te), or alternatively with short boom section (max.
With our example of 2 tonne at 3 metres, if the load or sling length causes the hook to be so high that the inner boom cannot be used for the lift, then probably an 8 tonne metre crane would be the size required.Ī winch rope crane will give a vertical lift as seen in Figure 2 (therefore no increase in radius), so this consideration is not applicable to UNIC & Cobra telescopic boom cranes fitted with winches.The crane was previously installed on a semi-submersible platform and can either be operated in standard set-up (max.
The resulting increase in the radius can be substantial and is often sufficient to over pressurize the luff rams and to activate the overload protection (if fitted) which may prevent the crane moving into the required position. The operator may not get sufficient hook height to clear the base of the load over the tray body. In this configuration, only the outer boom can be raised. To handle a high load of near crane capacity, the inner boom must be vertical (or near to vertical), and the outer boom pointing down, with the hook above the centre of the load. You would need a crane rated at 6 tonne metres or better to do the job BUT it is important to consider the physical size of the load you are lifting. But with high or long slung loads, this calculation can lead to an embarrassment! If we say that we need to lift 2 tonne at 3 metres, we would look for a 6 tonne metre crane. Caution: Heavy (in close) lifts have a complication.
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