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The Siemens Mains Interference Filter (3RT2926-1BD00) is designed for industrial automation professionals and machine builders seeking to protect electrical contactors from voltage spikes. Its primary benefit is extending the operational lifespan of contactors, especially those operating at 240V AC. A key consideration is its specific compatibility with motor protection circuit breaker size S2.
| Model Part Number | 3RT2926-1BD00 |
|---|---|
| Brand | Siemens |
The primary function is to suppress voltage spikes generated by electrical contactors, thereby protecting the contactor and extending its lifespan.
It supports nominal coil voltages of 127 - 240V AC at 50/60Hz and 150 - 250V DC.
It is designed for specific applications, particularly those involving contactors operating at 240V AC and compatible with motor protection circuit breaker size S2.
No, the filter operates passively by connecting across the contactor coil and does not require a separate power source.
This indicates the filter has one normally open (NO) and one normally closed (NC) auxiliary contact, which can be used for signalling or additional control functions within the system.
If your system uses contactors at 240V AC, experiences frequent contactor failures, or if the operating environment generates significant electrical noise, this filter is likely beneficial.
The manufacturer part number (MPN) for this filter is 3RT2926-1BD00.
Verify the filter is correctly wired in parallel with the contactor coil. Ensure the filter is rated for the correct operating voltage and that the associated motor protection circuit breaker is correctly sized and functioning.
Check for proper ventilation around the filter. Ensure the filter is not overloaded and that the wiring is secure, as loose connections can cause resistance and heat.
Confirm that the filter is correctly installed and that all connections are tight. Poor grounding or interference from other sources could also be a factor; check the overall system grounding.
Setup: The filter should be installed in close proximity to the contactor it is intended to protect. Connect the filter's input terminals in parallel with the contactor coil. Ensure all connections are secure and made according to the wiring diagrams provided by Siemens. The filter is designed for mounting on standard 35mm DIN rails.
Compatibility: This filter is specifically designed to protect electrical contactors operating at 240 V AC. It is suitable for integration with motor protection circuit breaker size S2, CLASS 10 (A-release 18-25 A, N-release 325 A). Verify coil voltage requirements (127 - 240V AC or 150 - 250V DC) before connecting.
Care: The Siemens Mains Interference Filter is a passive component and generally requires no regular maintenance. Keep the unit clean and free from dust and debris. Ensure ventilation around the unit is not obstructed. Periodically check electrical connections for tightness.
