Siemens 411 Manual De Usuario

 

MICROMASTER 411 & COMBIMASTER 411    Operating Instructions  

136 

6SE6400-5CA00-0BP0  

The default switching frequency of the MICROMASTER 411/COMBIMASTER 411 
is 4 kHz. This is usually adequate for most applications and will allow full 
performance to be obtained from all products over the full temperature range. 

Select the switching frequency using P1800. High voltage units are automatically 
derated by reducing the continuous output current if switching frequencies above 4 
kHz are selected. Deratings are shown at P1800 in the System Parameter list. 

The switching frequency will be automatically reduced if the internal temperature of 
the inverter becomes too high (see r0037, inverter temperature). This reduces 
losses and allows continued operation. This feature is controlled by P0290. 

Under extreme conditions of overload, the switching frequency may momentarily 
reduce to protect the inverter. 

Derating applies to constant torque and variable torque settings. Table 10-3 on 
page 136 shows the value to which the maximum outputs are reduced. 

Table 10-3 

Derating with Switching Frequencies 

0,37 

(0,5) 

1.2 1.2 1.2 1.2 1.2 1.2 1.2 

0,55 

(0,75) 

1.6 1.6 1.6 1.6 1.6 1.6 1.2 

0,75 

(1,0) 

2.1 2.1 2.1 2.1 1.8 1.8 1.2 

1,10 

(1,5) 

3.0 3.0 2.7 2.7 1.8 1.8 1.2 

1,50 

(2,0) 

4.0 4.0 2.7 2.7 1.8 1.8 1.2 

2,20 

(3,0) 

5.9 5.9 5.1 5.1 3.5 3.5 2.3 

3,00 

(4,0) 

7.7 7.7 5.1 5.1 3.5 3.5 2.3 

 

The inverter must not be mounted in an upside down orientation. Other mounting 
orientations are possible without derating.