SIEMENS VFD – Variable Frequency Drives
SIEMENS VFD
Save 20-50% on energy costs and gain reliable control of HVAC Equipment with new BT300 VFDs.
While constantly expected to do more with less, managing energy consumption and optimizing occupant comfort remains of utmost importance to facility managers. They require products that will integrate seamlessly into existing equipment and building management systems. The highly efficient BT300 delivers all this and more.
Variable Frequency Drives
BT300 Variable Frequency Drives

Siemens BT300 VFDs are designed specifically for the rigorous demands of today’s HVAC systems. Built-in features like a real-time clock, energy savings optimization programming and an easy-to-use and read interface get HVAC equipment up and running quickly and accurately.
BT300 Variable Frequency Drive

Siemens engineers have retooled and field tested our VFD portfolio to ensure it delivers optimum results.Available in frame sizes up to 250 hp, the BT300 is well-suited for demanding HVAC environments. Using the BT300 helps save 20-50% of energy compared to equipment with little or no control. Built-in features like a real-time clock, energy savings optimization programming and a sleep function help measure energy savings.
Highlights:
- Energy savings up to 50% when operating fans and pumps
- Drives up to 250 hp
- User-friendly control panel with intuitive interface
- Reliable control for a wide range of HVAC applications, including special control option in the event of fire
- Complete system integration with Siemens expertise
- Ethernet capabilities include BACnet IP and Modbus TCP
- Environment safe – RoHS compliant
BT300 Variable Frequency Drive Bypass Options

Siemens is proud to introduce the BT300 Variable Frequency Drive offering with Conventional or Electronic Bypass options. The BT300 VFD with Conventional or Electronic Bypass is designed with the same sophisticated and industry-leading features of the BT300 VFD. This provides peace of mind to customers in mission critical facilities.
Electronic Bypass
The Electronic Bypass utilizes internal control boards that act as the brains and eliminate the control wiring, relay logic, and terminal blocks. They are replaced with advanced built-in features that are accessible from an electronic keypad.
Features:
- Advanced Keypad with Start-Up Wizards and Displays
- Full Bypass Control – even if the Bypass Board Fails
- Auto Bypass
- Pass Through I/O
- Additional HVAC I/O Capability
- Essential Service
Conventional Bypass
The Conventional Bypass utilizes selector switches and indicator lights as primary functions.
Features:
- Advanced Keypad with Start-Up Wizards and Displays
- Two Drive Bypass Configuration Options
- 22 mm Components with Wide Viewing Angle
SED2 Legacy VFD Information
Designed specifically for HVAC applications, the SED2 VFD supports a wide variety of digital and analog I/O for diverse control capability. Built-in PID features control pumps and fans, and an integral system protocol can interface P1/N2 networks. Using the SED2 multi-level parameter access, operators can quickly pinpoint relevant data.
Feature | Function | Benefit |
---|---|---|
Available as Open IP20, NEMA Type 1, IP54 (NEMA Type 12) | Various enclosure choices and price options | Allows choice of proper cost/performance balance |
Built-in SBT P1 and JCI N2 (Metasys®) building automation system protocols for easy network integration | Reduced wiring cost, faster start-up, advanced system control via direct BMS control | Reduces total installation costs |
LON and Modbus interfaces optional | Integrates to existing BMS protocols | Allows seamless integration with existing BMS network |
Low Harmonics design | Eliminates most application needs for line reactors | Reduces system power stresses and demands |
Custom PID algorithm | PID appropriate for HVAC systems built in to every unit | Fast and accurate process and pressure control |
Pump controller/cascading functions | Pump staging for open loop, constant pressure, and constant flow-type applications, eliminating the need for separate pump controller | Reduces programming and commissioning time for reduced overall installation costs |
Accepts a wide variety of digital and analog I/O types, including direct Ni 1000 RTD sensor level inputs | Has built-in scaling for SBTs NI-1000W sensors; 0-10v and 0-20/4-20ma input signals are also available | Compatible with all common I/O, providing flexibility for many applications |
Belt failure detection with or without an external sensor | Enhances system diagnostics and safety | Provides system performance and warning feedback |
Multi-level program access | Allows user to custom configure and limit operator access and certain parameter settings | Provides security for escalation of technical issues |
One common interface throughout all power ranges | Know how to use one, know how to use them all | Minimizes training, maximizes familiarity |
Optional Advanced Operator Panel for uploading/downloading parameters | 4 x 30 character backlit multi-language LCD display; Alphanumeric display, self-contained memory, built-in basic scheduling function | Provides 4 line display to make programming and diagnostics easier |
Essential Service mode | Allows VFD to ignore all faults and continue to run in critical applications (commonly referred to as smoke purge) | Enhances critical functionality, meeting specifications for critical control |
Service mode for applications requiring continuous, uninterruptible operation | Maintains equipment up-time | Prevents costly shut downs |
Built-in Hand/Auto selection | Simplified control | No need for additional accessories |
UL, CSA, CE certifications | Meets agency requirements | Meets customer requirements |