Siemens 411 用户手册

MICROMASTER 411 & COMBIMASTER 411    Operating Instructions 

 

6SE6400-5CA00-0BP0 

117

 

 

Figure 10-1  Current Limit Interaction 

 

Table 10-1 shows sample results comparing current measured with a current 
scope, and the current displayed on the inverter, using measurements taken from a 
variety of inverters at various switching frequencies, current loads, frequency 
setpoints and cable lengths. 

Table 10-1 

Measured Current Monitoring Accuracy 

Switching frequency 

4 kHz 

4 kHz 

Load on inverter 

Nominal load 

4 A 

Nominal load 

7,7 A 

Frequency setpoint 

45 Hz 

45 Hz 

Scope current (long cable)* 

4,00 A 

7,70 A 

Drive current 

4,05 A 

7,46 A 

% difference (inverter/scope)* 

1,32 % 

-3,9 %