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ansen
3.4. The standard elements of the cooling systems
1) Positive displacement pump P with incorporated pressure
relief valve.
Electric motor protection according to IP 54 (IEC)
Standard voltage range is either 230V/400V, 50Hz or
276/480V, 60Hz
2) Oil-to-air cooler B
A separately driven fan forces an air stream through the
cooler.Standard voltage range is either 230V/400V, 50Hz or
276/480V, 60Hz
3) Oil-to-water cooler C using fresh water in counter flow.
Max. water pressure: 8 bar
An oil-to-water cooler C for cooling with seawater can be
supplied upon special request.
4) Flow switch M f controls the oil flow into the gear unit.
This switch can trigger an alarm signal when the oil supply is
inadequate. In such an event, the gear unit has to be stopped at
once and the cause of the interruption of the oil supply has to be
removed.
5) Filter F with incorporated pressure relief valve
6) Thermostatic valve V ct1 in the oil circuit to by-pass cooler
at low temperatures so as to limit oil pressure
7) Thermometer I t to give actual monitored oil temperature
8) Temperature switch M t1 at the cooler outlet to indicate a
high temperature condition
9) Optional devices
The cooling system can be equipped with following standard
options:
- Temperature switch M t2 monitoring the motor of the air
cooler (air cooling system)
- Thermostatic valve V ct2 in the water supply circuit
(water cooling system) to conserve water
- Duplex filter F for continuous operation, with incorporated
pressure relief valve
- Electrical and/or visual contamination indicator
incorporated in the filter
Note: when a cooling system is fitted, the oil level must be checked
after a short test run of the cooling system (cooler should be filled with
oil).
Air and water cooling system
V ct2
t°
I t t°
F
F
B
M
P
DESCRIPTION
C
V ct1
M t1
M t2
M f
t°
M
V ct1 t°
Optional accessories:
Base plate M10
Heater:
Immersion oil heater for low temperature start-up is optional.
The heater can be removed without disassembling the gear unit.
Bearing monitoring:
temperature: Pt100 at high and/or low speed shaft
vibration: nipple at high and/or low speed shaft
Oil level:
switch or oil sight glass
Oil sump temperature:
fixed alarm or adjustable alarm or meter Pt100
Sound pressure level
The chart shows the maximum sound pressure level at 1 meter, with
90% probability for Hansen P4 gear units at 1500 rpm input speed.
Certified sound pressure level on request
85
80
75
70
65
60
10
Pa (absorbed power kW) for SF≤2,5 and n1=1500rpm
Shipping conditions
Inspection prior to shipment
•
No load test
•
Conformance check to the acknowledgment of order
Protection
• Painting:
- outer side housing: all Hansen P4 gear units are standard
provided with a two component epoxy coating.
Improved surface protection : good corrosion protection for many
years in a non-aggressive atmosphere.
Dry film thickness : average 100 µm (primer included).
Excellent base for all kinds of special paints, these can also be
applied on site after a longer period of time.
Suitable to apply humidity resistant paint and high resistant paint
as an option.
- inner side housing: oil resistant paint
- inner components: sprayed with rust preventive oil
• Shaft extensions: greased and protected with waxed waterproof
paper
Lubricants
• Units are shipped without oil.
• Grease lubrication points are factory filled.
For information relating to storage, handling, installation, starting-up
and maintenance, refer to the Service Manual which is supplied with
each unit.
DESCRIPTION
refer to page A1
100
500
A4
HANSEN P4991227 03/2021
E
EN
A4
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