Siemens 6SN1145-1BB00-0FA1 Power Supply 120kW / 156kW

The Siemens 6SN1145-1BB00-0FA1 is a high-capacity power supply module from the SIMODRIVE 611 series. It converts three-phase AC mains into a regulated DC link voltage for feeding multiple drive inverters. Continuous output power is rated at 120kW, with a peak of 156kW for short-term overloads, making it suitable for demanding machine tool and handling applications.

Input and Output Specifications

Input voltage range is 380V to 480V AC, 3-phase, 50/60 Hz. The DC link output voltage is adjustable between 510V and 720V DC depending on mains conditions. Continuous output current is 300A, with peak current up to 390A for 10 seconds. The unit includes a built-in braking chopper for regenerative energy management.

Design and Cooling

The module is housed in a rugged chassis with forced-air cooling via integrated fans. Dimensions are approximately 385mm height, 237mm width, and 270mm depth. Weight is 23 kg. It is designed for mounting in a control cabinet with minimum clearance for airflow. Operating temperature range is 0°C to 40°C, derating above 40°C.

Protection and Monitoring

Features include overvoltage, undervoltage, overcurrent, and overtemperature protection. LED status indicators show ready, fault, and DC link charge. The module provides relay contacts for external monitoring. It complies with EN 61800-3 for electromagnetic compatibility and EN 60204-1 for electrical safety.

Integration with SIMODRIVE

The 6SN1145-1BB00-0FA1 is designed to work with SIMODRIVE 611 digital and analog drive controllers. It supplies the DC link voltage for up to multiple axis modules. The braking chopper can dissipate regenerative energy into an external braking resistor, preventing overvoltage during deceleration.

Applications

Common applications include CNC machine tools, printing presses, winding machines, and test stands. The high power rating supports multiple servo drives simultaneously. It is also used in retrofit projects to replace older power supply units.

Installation Considerations

Proper grounding and line reactors are recommended for reliable operation. The unit requires a 24V DC auxiliary supply for control electronics. Siemens provides detailed dimension drawings and connection diagrams in the hardware manual.

Conclusion

The Siemens 6SN1145-1BB00-0FA1 delivers 120kW continuous and 156kW peak power for multi-axis drive systems. Its robust design, monitoring features, and compatibility with SIMODRIVE 611 make it a critical component for high-performance motion control.