Siemens SINAMICS G120XA 90kW Variable Frequency Drive

Technical Overview

90kW 3AC 380-440V variable frequency drive for pump, fan, and compressor applications, featuring IP20 protection and Modbus RTU.

Key Features

Designed for pump, fan, and compressor applications.
3-phase input voltage 380-440 V (-20% to +10%).
Rated power 90 kW.
IP20 protection.
Integrated fieldbus: MODBUS RTU, BACnet MS/TP, USS.
Supports induction, permanent magnet synchronous, and synchronous reluctance motors.
Integrated safety function: Safe Torque Off (STO) to SIL 3.
Intelligent application functions: deragging, multi-pump control, fire mode.
High efficiency of 98%.
Unfiltered for EMC (requires external filtering for specific categories).

Technical Specification Matrix

Parameter	Value
Input Number of Phases	3 AC
Input Line Voltage	380-440 V (+10% / -20%)
Line Frequency	47-63 Hz
Rated Input Current (LO)	164.00 A
Rated Input Current (380V)	174.00 A
Output Number of Phases	3 AC
Rated Output Voltage	400 V
Rated Power IEC 400V (LO)	90.00 kW
Rated Output Current (LO)	164.00 A
Max. Output Current	181.00 A
Pulse Frequency	4 kHz
Output Frequency (Vector Control)	0-240 Hz
Output Frequency (V/f Control)	0-550 Hz
Overload Capability (LO)	110% base load current IL for 60 s in a 600 s cycle time
Power Factor λ	0.75-0.93
Offset Factor cos φ	0.99
Efficiency η	0.98
Sound Pressure Level (1m)	73.1 dB
Power Loss	2.160 kW
Integrated Filter Class	Unfiltered
EMC Category (with accessories)	without
Safety Function	Safe Torque Off (STO)
Communication Interfaces	USS, Modbus RTU, BACnet MS/TP
Standard Digital Inputs	6
Digital Outputs (Relay)	4 (changeover contact, DC 30 V, 1.0 A resistive load)
Analog Inputs	2 (differential input, 12 bit resolution)
Analog Outputs	2 (non-isolated)
Motor Temperature Sensor Input	1 (PTC, KTY, PT1000, Thermo-Click)
Protection Class	IP20
Frame Size	FSF
Physical Weight (kg)	66.8
Dimensions L x W x H (cm)	36 x 30.5 x 70.9

Industrial Applications

1. HVAC Systems for Large Commercial Buildings

This drive is suitable for controlling large-scale ventilation fans and circulation pumps within commercial building HVAC systems. Its 90 kW power output and 380-440V 3AC input precisely match the requirements for high-capacity air handling units and chilled water pumps.

Problem Solved

Enables energy-efficient variable speed control of large HVAC motors, reducing energy consumption and operational costs by adjusting motor speed based on demand, rather than running at full capacity continuously. The IP20 rating allows for installation within electrical cabinets commonly found in building plant rooms.

Variable Frequency DriveHVACFan ControlPump ControlEnergy Efficiency90 kW380-440VIP20

2. Water Treatment Plant Pumping Stations

Ideal for controlling high-power centrifugal or submersible pumps in water/wastewater treatment facilities, such as those used for raw water intake, clarified water transfer, or effluent discharge. The 90 kW rating handles substantial fluid movement.

Problem Solved

Provides precise flow control and pressure regulation for water pumping applications, preventing water hammer, reducing wear on mechanical components, and optimizing treatment processes. The integrated Modbus RTU/BACnet MS/TP communication facilitates seamless integration into SCADA or Building Management Systems.

Water/WastewaterPumping StationFlow ControlPressure Regulation90 kWModbus RTUBACnet MS/TPCentrifugal Pump

3. Industrial Air Compressor Control

This converter can be used to regulate the speed of 90 kW industrial air compressors, common in manufacturing plants for pneumatic tools, process air, or conveying systems.

Problem Solved

Optimizes compressor performance by matching air output to demand, significantly reducing energy waste associated with fixed-speed compressors running unloaded. The robust 380-440V 3AC input and overload capability (110% for 60s) ensure reliable operation in demanding industrial environments.

Industrial AutomationAir CompressorSpeed ControlEnergy Saving90 kW380-440VOverload Capability