Справочник Пользователя для Siemens Outboard Motor S120

Motor components of the built-in motor and options 

 

3.2 Thermal motor protection 

Table 3- 1 

Cooling method 

Size 

Cooling jacket 

Integrated cooling 

1FW609 

X 

 

1FW613 

X 

 

1FW615 

X 

 

1FW616 

 

X 

1FW619 

 

X 

1FW623 

 

X 

1FW629 

 

X 

3.2 

Thermal motor protection 

3.2.1 

Description of the temperature sensors 

Temperature sensor 

1FW6 stators are equipped with the two temperature monitoring circuits described below 

(Temp-S and Temp-F) in order to protect the stator against excessive thermal stress and to 

monitor the temperature during commissioning and operation. 

Temp–S 

There are two temperature shutdown circuits, consisting of PTC temperature sensors (PTC 

elements), for monitoring the motor winding: 
●  1 x PTC 130 °C element for each phase winding (U, V, and W), i.e. switching threshold at 

130 °C, and 

●  1 x PTC 150 °C element for each phase winding (U, V, and W), i.e. switching threshold at 

150 °C. 

The PTC elements for the two temperature shutdown circuits are connected in series, with 

each element connected to a triplet. 
The characteristics of the PTC elements comply with DIN VDE 0660 Part 303, DIN 44081, 

and DIN 44082 (see also the table below). 
The cable connection is also monitored with PTCs 80 °C on the housing. A PTC 80 °C is 

connected to the PTC 130 °C triplet and a PTC 80 °C is connected to the PTC 150 °C triplet 

in series. 
 
Function: 
Each PTC element has a "quasi-switching" characteristic, that is, a sudden increase in 

resistance occurs at the rated response temperature ϑ

NAT

 (switching threshold). As a result 

of the low thermal capacity and the good thermal contact between the PTC element and the 

motor winding, the sensors - and therefore also the system - quickly respond to inadmissibly 

high stator temperatures.  

 

1FW6 Built-in torque motors 

44

 

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