Siemens SINAMICS G120C User Manual

• Line impedance
• Actual motor torque
The maximum possible output voltage as a function of the input voltage is provided in the
technical data.
General converter technical data (Page424)
Table 8-61 The characteristic that matches the application
Requirement Application exam‐
ples
Remark Charac‐
teristic
Parameter
The required
torque is inde‐
pendent of the
speed
Conveyor belts,
roller conveyors,
chain conveyors,
eccentric worm
pumps, compres‐
sors, extruders,
centrifuges, agita‐
tors, mixers
- Linear p1300=0
The converter compensates for the
voltage drops across the stator re‐
sistance. Recommended for mo‐
tors less than 7.5kW.
Precondition: You have set the mo‐
tor data according to the rating
plate and have performed the mo‐
tor identi󹪝cation after quick com‐
missioning.
Linear
with Flux
Current
Control
(FCC)
p1300=1
The required
torque increa‐
ses with the
speed
Centrifugal
pumps, radial fans,
axial fans
Lower losses in the motor and con‐
verter than for a linear characteris‐
tic.
Parabolic p1300=2
Table 8-62 Characteristics for special applications
Requirement Application exam‐
ples
Remark Charac‐
teristic
Parameter
Applications
with a low dy‐
namic response
and constant
speed
Centrifugal
pumps, radial fans,
axial fans
If the speed setpoint is reached and
remains unchanged for 5 seconds,
then the converter reduces its out‐
put voltage.
As a consequence, the ECO mode
saves energy with respect to the
parabolic characteristic.
ECO
mode
p1300 = 4
or
p1300 = 7
The converter
must maintain
the motor
speed constant
for the longest
possible time.
Drives in the textile
sector
When reaching the maximum cur‐
rent limit, the converter only re‐
duces the output voltage, but not
the frequency.
Precise
frequen‐
cy charac‐
teristic
p1300 = 5
or
p1300 = 6
Freely adjusta‐
ble U/f charac‐
teristic
- - Adjusta‐
ble char‐
acteristic
p1300 = 3
U/f characteris‐
tic with inde‐
pendent volt‐
age setpoint
- The interrelationship between the
frequency and voltage is not calcu‐
lated in the converter, but is speci‐
󹪝ed by the user.
Inde‐
pendent
voltage
setpoint
p1300 = 19
Advanced commissioning
8.20Motor control
SINAMICS G120C Converters
302 Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK

Siemens SINAMICS G120C Specifications

General

Communication Interfaces	PROFINET, PROFIBUS, USS, Modbus RTU
Protection Class	IP20
Ambient Temperature	-10°C to +50°C
Storage Temperature	-40°C to +70°C
Power Range	0.55 kW to 132 kW
Voltage Range	380 V to 480 V
Output Voltage	0 V to Supply Voltage
Frequency Range	0 Hz to rated output frequency
Control Modes	Vector control with encoder
Protection	Overload, overvoltage, undervoltage, short circuit, ground fault
Relative Humidity	5% to 95%, non-condensing
Altitude	Up to 2000 m without derating