Siemens SINAMICS G120XA 30kW Frequency Converter

Technical Overview

30kW 3AC 380-440V VFD for pumps/fans. Features IP20, MODBUS RTU, BACnet MS/TP, USS, and 97% efficiency for energy savings.

Key Features

Integrated Fieldbus: Supports MODBUS RTU, BACnet MS/TP, and USS protocols for seamless connectivity.
Comprehensive Protection: Features an IP20 protection rating.
Certified Quality: Certified with RoHS, CCC, ISO 9001, and CE standards.
Robust Construction: Constructed with steel material in Frame Size FSD.
User-friendliness: Optimized user interfaces with optional IOP-2 Intelligent Operator Panel and SINAMICS G120 Smart Access web server module for easy setup and commissioning.
Energy Efficiency: Exceeds 98% efficiency, includes ECO mode, bypass function, and an energy/flow calculator for monitoring savings.
Integrated hardware and software functions for enhanced efficiency.
Designed for pump and fan applications in water/wastewater and HVAC.

Technical Specification Matrix

Parameter	Value
Product Type	SINAMICS G120XA
Input Number of Phases	3 AC
Input Line Voltage	380 ... 440 V +10 % -20 %
Input Line Frequency	47 ... 63 Hz
Rated Current (LO)	56.00 A
Output Number of Phases	3 AC
Output Rated Voltage	400 V
Rated Power IEC 400V (LO)	30.00 kW
Rated Current 400V (IN)	58.00 A
Rated Current 380V (IN)	59.00 A
Max. Output Current	64.00 A
Pulse Frequency	4 kHz
Output Frequency for Vector Control	0 ... 240 Hz
Output Frequency for 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
Power Factor cos φ 1	0.99
Efficiency η	0.97
Sound Pressure Level (1m)	62.2 dB
Power Loss	0.924 kW
Filter Class (integrated)	Unfiltered
EMC Category (with accessories)	without
Communication Interfaces	USS, Modbus RTU, BACnet MS/TP
Standard Digital Inputs	6
Digital Outputs (Relay Changeover Contact)	4 (DC 30 V, 1.0 A resistive load)
Analog / Digital Inputs	2 (Differential input, 12 bit resolution)
Analog Outputs	2 (Non-isolated output)
PTC/KTY Interface	1 motor temperature sensor input
Protection Rating	IP20
Frame Size	FSD
Physical Weight (kg)	17.9
Dimensions L x W x H (cm)	23.9 x 20 x 47.2

Industrial Applications

1. Water Pumping Station Control

This converter is suitable for controlling large pumps in municipal water treatment plants or irrigation systems. Its 30 kW power rating and 380-440V 3AC input are ideal for industrial-grade pumps, while the IP20 rating is acceptable for installation in enclosed electrical rooms.

Problem Solved

Provides precise control over pump speed to maintain constant water pressure or flow, significantly reducing energy consumption and extending pump lifespan through optimized soft starts and stops.

Variable Frequency Drive (VFD)pump control30kW3-phase400VModbus RTUenergy efficiency

2. HVAC System Fan Control in Commercial Buildings

The SINAMICS G120XA is an excellent choice for regulating large air handling unit (AHU) fans in commercial buildings. Its 30kW rated power can drive substantial fans, and the integrated BACnet MS/TP communication facilitates seamless integration with building management systems (BMS). The 97% efficiency contributes to significant energy savings.

Problem Solved

Optimizes air flow and pressure in HVAC systems based on real-time demand, leading to improved indoor air quality, enhanced comfort, and substantial reductions in operational energy costs.

HVACfan controlBuilding Management System (BMS)BACnet MS/TP30kWVFDenergy saving

3. Industrial Compressor Motor Regulation

In manufacturing or process industries, this 30kW drive can effectively regulate the speed of compressor motors. Its capability to handle 380-440V 3AC input and provide a regulated output frequency (up to 550 Hz for V/f control) makes it versatile for various compressor types. An appropriate electrical cabinet is required due to its IP20 rating.

Problem Solved

Matches compressor output precisely to actual compressed air demand, eliminating wasteful 'blow-off' operations and ensuring stable system pressure, which drastically reduces energy consumption and mechanical wear.

Compressormotor controlVFD30kW400VUSS communicationpressure regulationindustrial automation