Low Frequency Voltage Boost (Ku); Current Limit - Siemens 6SE2101–1AA01 Operating Manual

Voltage
%
100
90
80
70
60
50
40
30
20
Boost
Ku
10
0 10 20
Figure 2: Voltage/Frequency Characteristic Curves

1.4.2 Low Frequency Voltage Boost (Ku)

The output voltage can be boosted in 0.1% steps up to 30% for low frequencies from 0 Hz. This may be required
to give additional starting torque in some applications. The amount of voltage boost decreases linearly until
100% voltage is achieved.
If required, automatic boost may be used (see section 5.3.2, Parameter P19) . This measures the motor
characteristics and selects a suitable boost voltage at first switch–on.

1.4.3 Current Limit

The maximum output current available from the inverter can be adjusted to provide thermal protection of the
motor and/or limit the maximum motor torque (see section 5.3.2, parameters P17 and P18) .
1/4
1
0 5
4
30 40 50 60 70
2 3
80 90 100 110 120
English
400
Frequency