Subsea Electro-Hydraulic Pump Unit

The system comprises an electro-hydraulic unit that connects to hydraulic driven equipment (underwater hammer, vibrator, etc.) for underwater operations and was developed through a research program. Only approx. 200 runtime hours in use.
Equipment Info
Manufacturer
Berendsen PMC Hydraulikk (now Servi Motion Control)
Year built
2000
Condition
Used
Ownership
Terms
As-is, where is
Part No
One OFF
Location
Norway
ID
1335
Seller
Dockstr User Verified user

User since May 2019

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Details

Electric Motor: (26) Refer to numbering in attached drawing.
Model/type: From BEVI Norge AS, SKG 315M-44
Motor effect: 160 kW @ S6-30% operation i.e. continuous operation with full load 30% of a 10 minute period, 132 kW @ normal load.
Operational voltage: 3 x 400 V Y, 3 x 690 V Δ, frequency 50 Hz.
Revolutions: 1485 RPM (4-poles)
Max power consumption: @ 400 V: 272 A, @ 690 V: 158 A
Start power consumption: approx. 8 x max power consumption.

Includes 150 m electric cable.  

Hydraulic Pump (21)
Model/type: Kawasaki K3VG280-1ANR-4000

Max operational pressure: 220 bar
Design pressure: 250 bar
Max oil delivery volume: 400 l/min @ 220 bar.

Submersible Tank (32) with Volume & Pressure Compensator (30)
Submersible tank (32):  Steel tank with total volume approx. 800l.
Compensator (30):
The tank is fully filled with hydraulic oil and the compensator with a spring loaded piston ensures that there is always a positive differential pressure inside the tank. With variations in oil volume, hydrostatic pressure from the surrounding water and hydraulic oil temperature, the compensator will be pushed outward with increasing oil volume and inward with decreasing oil volume.

Oil Cooling System
The cooling loop comprises a hydraulic driven water pump (20) that circulates sea water through the cooler (17). The cooler’s oil side is connected to the return line from attached equipment. A separate pump (24) for this purpose is mounted directly onto the main hydraulic pump (21).

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