Active Heave Compensation data :
Design parameters :
AHC SWL : 5T
Displacement : 3m
Wave period :12s

Heave (Hoisting) speed required : 54m/min
Acceleration required : 0.6m/s2
Level of Active Heave Compensation typically : ~95%

Loading forces to deck structure :
1. Dynamic overturning moment : 1380 KN.m
2. Dynamic vertivcal force : 220 KN
3. Dynamic horizontaa force  : KN

Electric Motor :
Power Supply : 440V/60Hz/3Ph
Protection Grade : IP56
Insulation Grade : F
Space Heater : 230V/60Hz/1Ph
Power consumption : 132KW

Control System
Control handle :
1. Main control valve
2. Spring centred control handles
- Hoisting up / down motion 
- Luffing up / down motion knuckle jib 
- Luffing up / down motion main boom
- Slewing right / left motion
- All motions are of infinite variable (stepless) control from zero to full speed.
3. Instruction and name plates in English
4. Dynamic load radius chart

Control Model :
1. Normal
2. Active Heave Compensation (AHC)

Safety System
1. Control system
-  Load limiting system
2. All main hydraulic circuits are protected from over-pressure by relief valves
set to values corresponding to crane’s capacities
- Overload protection
- Emergency stop
3. Drive system
- Electric motor
- Thermistor protection
- Hydraulic power unit
- High hydraulic oil temperature alarm / stop
- Low hydraulic oil level alarm / stop
4. Slewing machinery
- Load holding valve which will hold motion in case of hydraulic pressure drop
- Fail safe multi-disc brake

Slew bearing
- Reputable and recognized Maker
- Bolts and nuts of high tensile steel
Slew gear
- Gear with brake, motor and load control valve as one complete unit
- Internal pinion drive

5. Luffing machinery
- Load holding valve which will hold motion in case of hydraulic pressure drop
- Luffing cylinder(s) designed to reduce speed before reaching end positions

6.Hoisting machinery
Main winch
- Manual Overload Protection System (MOPS)
- Load holding valve which will hold motion in case of hydraulic pressure drop
- Fail safe multi-disc brake. Brake is spring operated and pressure released
- 5 turns of wire rope remain on winch drum when all wire rope is paid out
- Hook stop in upper and lower most positions

7. Wire sheaves
- Fixed wire sheave bracket
- Grease nipples

Hydraulic Arrangement
1. Hydraulic system
- Open loop system
- Hydraulic motor(s)
- Fixed displacement bent axis piston motor(s) for slewing motion.
- Fixed displacement bent axis piston motor(s) for winch(es) of fixed speed
2. Hydraulic oil tank
- Integrated in crane
- Hatch for inspection and cleaning
- Drain valve
- Full flow return filter(s), pressure and drain filters for sensitive circuits,
eg pilot and feed circuits
- Sight glass with temperature indicator
- Level switch for low level alarm and low, low level stop
- Temperature sensor for cooler control and automatic stop in case
of overheating
3.  Hydraulic lines
- Pipes:Mild steel material,Painted
- Pipe fittings: Zinc plated mild steel material.External fittings are painted
and protected by Denso tape or Tectyl against corrosion.
- Hoses:High rubber quality for best resistance against sunlight and
salinity,Wire breaded for applicable specified hydraulic pressure ratings
- Hose couplings: Zinc plated mild steel material, External couplings are
painted and protected by Denso tape or Tectyl against corrosion
4. System cleanliness
- All components are thoroughly cleaned prior to installation.
- Cleanliness to NAS level 8

Electric Arrangement
1. Power supply:Slipring assembly for transfer of electric power to
crane’s rotating sections
2. Electric motor(s) (for applicable zone)
- Motor rating S6-40 % ID / S1-100 % CD
- Protection class IP54.
- Insulation class F.
- Temperature rise class F.
- Stillstand heating against condensation
- Squirrel cage
- Self-cooling (fan)
3. Electric motor starter
- Protection class IP56.
- Safety door (main isolation) switch
i. Start push button – green colour.
ii. Stop push button – red colour.
iii. Emergency push / pull button – red colour.
iv. Lamps
- Power on – white colour
- Running – green colour
- Stillstand heating – blue colour
v. Stillstand heating control
vi. Potential-free contact for motor running feedback.

Surface Treatment
1. External treatment
- Pedestal, crane house and boom
i. Surface preparation to ISO 8501-1, SA 2.5
ii. First coat zinc rich epoxy primer to 50 µm dry film thickness
iii. Second coat two pack epoxy to 100 µm dry film thickness
iv. Third coat polyurethane finish to 65 µm dry film thickness
v. Total; three coats to 200 µm dry film thickness
2. Internal treatment
- Pedestal and crane house
i. Surface preparation to ISO 8501-1, SA 2.5
ii. First coat zinc rich epoxy primer to 40 µm dry film thickness
iii. Second coat two pack epoxy to 75 µm dry film thickness
- Oil tank (integrated in crane house)
i. 16.2.2.1 Surface preparation to ISO 8501-1, SA 2.5
ii. 16.2.2.2 First coat zinc rich epoxy primer to 40 µm dry film thickness
- Boom
No treatment as fully closed steel box structure.

Lubrication
- All grease nipples to GB standard.
- Crane:Fully lubricated for first set of operating hours

Price & terms : Please enquire using the email form below.

If you cannot find the Offshore Crane that you need,
please send us an email to mail@worldoils.com stating your
requirements and we shall find it for you.

We can arrange delivery of containers where needed.

The details mentioned above are believed to be accurate but are not guaranteed.

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