SINAMICS G120 Modular Frequency Inverter – 0.55–250 kW for Global Industrial Needs
The SINAMICS G120 is a modular frequency inverter designed to meet diverse industrial requirements. With its modular component design and wide power range of 0.55 kW to 250 kW, it enables optimal configuration tailored to specific application needs. Available in three voltage variants compatible with 200 V, 400 V, and 690 V power grids, this series includes a comprehensive safety software package. Safety functions can be commissioned using STARTER or SINAMICS Startdrive software.
Purchase & Ordering
Q: Can the order numbers for 400V and 690V models be used interchangeably?
A: No, they are not interchangeable. The order number prefixes differ by voltage. Always clearly specify voltage class and grid type when placing an order.
Installation & Wiring
Q: After wiring a 690V model, it frequently shows "Overvoltage Fault" – is this a wiring error or inverter defect?
A: This is mostly due to wiring or grid issues. Check grid voltage, verify motor wiring connections, and ensure the brake resistor matches the 690V requirements.
Commissioning & Operation
Q: When commissioning with STARTER software, the safety function (STO) fails to activate – how to fix this?
A: Confirm control unit model compatibility, complete motor parameter configuration, access safety parameter group settings, and check safety circuit wiring.
Maintenance & Troubleshooting
Q: After 3 years of operation, the inverter frequently shows "Overheating Fault" – which parts need replacement?
A: Likely aging cooling fan requiring replacement. Inspect fan for noise or jamming and clean heatsink with compressed air to remove buildup.
Regional Adaptation
Q: Southeast Asian factories have high humidity – how to protect against condensation?
A: Upgrade to IP54-rated control cabinet with moisture-proof heater, seal cable entries with waterproof glands, and clean inverter interior regularly with dry air.