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SIMOVERT P 6SE21 Series Inverters
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) .
1.5 Options
The following options are available for use with 6SE21 inverters:
Sinewave Filter Module
NAMUR Interface Module
Relay Module *
Tachometer Interface Unit *
Clear Text Operator Panel *
* These options cannot be fitted in combination with each other.
10
G85139–A1615–U156–A
02.95
1
0
5
4
30
40
50
60
70
Part No. 6SE2100–1FC51/53/55
Part No. 6SE2100–1FC50/52/54
Part No. 6SE2100–1GA00
Part No. 6SE2100–1DA00
Part No. 6SE2100–1CA00
Operating Instructions
2
3
80
90
100
110
120
400
Frequency
Siemens plc 1995
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