Siemens SINAMICS G120C 30 kW Unfiltered Inverter

Technical Overview

Compact 30 kW, 380-480V 3AC unfiltered frequency inverter with integrated PROFINET-PN and Safe Torque Off, IP20 rated.

Key Features

Compact design for space-saving installations.
PROFINET-PN fieldbus integrated for advanced communication.
Safe Torque Off (STO) integrated for critical safety functions.
380-480 V 3AC input voltage range.
Rated power of 30.0 kW with 150% overload for 3 seconds.
I/O interface: 6 Digital Inputs, 2 Digital Outputs, 1 Analog Input, 1 Analog Output.
IP20/UL open type degree of protection.
Unfiltered output.

Technical Specification Matrix

Parameter	Value
Rated Power (Low Overload)	30.0 kW
Input Voltage	380-480 V 3AC +10/-20%
Line Frequency	47-63 Hz
Rated Input Current (LO)	53.00 A
Output Voltage	400V IEC / 480V NEC
Rated Output Current (LO)	58.00 A
Max. Output Current	87.00 A
Overload Capability (LO)	150 % base load current IL for 3 s, then 110 % for 57 s in 300 s cycle
Overload Capability (HO)	200% base load current IH for 3 s, then 150% for 57 s in 300 s cycle
Pulse Frequency	4 kHz
Output Frequency (Vector Control)	0-240 Hz
Output Frequency (V/f Control)	0-550 Hz
I/O Interface	6 DI, 2 DO, 1 AI, 1 AO
Fieldbus Integrated	PROFINET-PN
Degree of Protection	IP20/UL open type
Efficiency η	0.98
Power Factor λ	0.90-0.95
Sound Pressure Level (1m)	72 dB
Power Loss	1040.0 W
Filter Class (integrated)	Unfiltered
Standard Digital Inputs	6
Fail-Safe Digital Inputs	1
Digital Outputs (Relay Changeover Contact)	1 (DC 30 V, 0.5 A)
Digital Outputs (Transistor)	1 (DC 30 V, 0.5 A)
Analog/Digital Inputs	1 (Differential input, 10 bit resolution)
Analog Outputs	1 (Non-isolated output)
Physical Weight (kg)	17
Dimensions L x W x H (cm)	49.5 x 35.6 x 30

Industrial Applications

1. Conveyor Belt Systems for Material Handling

This drive precisely controls the speed and torque of motors driving conveyor belts, allowing for smooth acceleration/deceleration and optimized material flow in manufacturing or logistics facilities. The 30 kW power output and 150% overload capability handle starting loads and variations.

Problem Solved

Provides precise speed control and efficient handling of varying loads on conveyor systems, preventing material spills and optimizing throughput while ensuring safe operation with integrated STO.

Variable Frequency DriveMaterial HandlingConveyor ControlTorque Control30 kW MotorIP20 EnclosurePROFINET

2. Pump and Fan Control in HVAC Systems

The SINAMICS G120C can regulate the speed of pumps and fans in large-scale HVAC (Heating, Ventilation, and Air Conditioning) systems, optimizing energy consumption and maintaining desired pressure or flow rates. Its 30 kW rated power is suitable for significant pumping or ventilation requirements, and the 47-63 Hz input frequency tolerance allows for robust operation.

Problem Solved

Achieves energy efficiency and precise regulation of fluid dynamics (pressure, flow) or air circulation in industrial HVAC applications, reducing operating costs and improving system stability.

HVACPump ControlFan ControlEnergy OptimizationVFD30 kW3-PhasePROFINETIP20

3. Machine Tool Spindle Control (Basic Applications)

For less demanding machine tool applications, this drive can manage the speed and direction of a spindle motor. The high output frequency (up to 550 Hz for V/f control) allows for a range of motor speeds, while the integrated STO provides a critical safety function during maintenance or emergency stops. The 30 kW rating is adequate for medium-duty machining operations.

Problem Solved

Offers reliable and safe speed control for machine tool spindles in applications where precise vector control is not strictly necessary, improving process flexibility and operator safety.

Machine ToolSpindle ControlV/f ControlSafe Torque Off30 kW MotorIndustrial AutomationPROFINET