Справочник Пользователя для Siemens Outboard Motor S120

Motor components of the built-in motor and options 

 

3.3 Cooling 

During continuous operation, the motor can only be loaded to the extent that the effective 

continuous torque M

eff

 does not exceed the rated torque M

N

. As a result, therefore, the 

effective power loss cannot exceed the rated power loss P

V,N

. 

⎟

⎜

0

HII

 

If the actual effective loss is impossible to predict or too complex to calculate, the total 

combined continuous power loss (table values) of all the motors deployed can be used 

instead to calculate the required cooling power. 
In this case, the resulting discrepancy vis-à-vis the actual effective power loss may mean 

that the cooling system is overdimensioned. 
The cooling system must be sufficiently powerful to ensure the required coolant pressure 

even at the maximum volume flow rate. 

3.3.2 

Coolant 

Provision of the cooling medium 

The customer must provide the cooling medium. Only water with anti-corrosion agent should 

be used as the cooling medium.  

 

WARNING 

 

Oil must not be used as a coolant because it is incompatible with materials used in motors 

with a cooling jacket and may cause O-rings to corrode. In motors with integrated cooling, 

oil can corrode the hoses of the cooling system inside the motor. 

 

Reason for the use of water with an anti-corrosion agent 

The use of untreated water may lead to considerable damage and malfunctions due to water 

hardness deposits, the formation of algae and slime, as well as corrosion, for example: 
●  Worsening of the heat transfer 
●  Higher pressure losses due to reductions in cross-sectional area 
●  Blockage of nozzles, valves, heat exchangers and cooling ducts 
For this reason, water as a cooling medium must contain an anti-corrosion agent that reliably 

prevents deposits and corrosion even under extreme conditions. 

 

1FW6 Built-in torque motors 

52

 

Configuration Manual, 05/2009, 6SN1197-0AE00-0BP3