SIEMENS 6RX1800-0AS50 – Sinewave Filter | SINAMICS DC Master Platform
Engineering Background: In high-power DC drive systems, the inverter output contains high-frequency switching harmonics that generate steep voltage rise times (dv/dt). Without proper output filtering, these transients propagate through motor cables, inducing insulation stress, bearing currents, and premature motor winding failure. In critical industrial processes—steel rolling mills, paper machines, mine hoists, and marine propulsion—an unplanned motor failure can halt production for days, costing hundreds of thousands in downtime. The SIEMENS 6RX1800-0AS50 Sinewave Filter is the engineered solution that stands between your drive system and catastrophic motor damage.
Product Positioning: The 6RX1800-0AS50 is a factory-designed output sinewave filter developed specifically for the SIEMENS SINAMICS DC Master (DCM) converter platform. It converts the pulsed DC output waveform into a near-sinusoidal voltage profile, dramatically reducing dv/dt stress on motor windings and eliminating common-mode interference on long cable runs. As part of the SINAMICS ecosystem, this filter is engineered to maintain full drive performance while extending connected motor service life—making it the preferred choice for OEMs and end-users operating in demanding, continuous-duty environments worldwide.
Complete Technical Specifications
- Manufacturer: Siemens AG
- Part Number / SKU: 6RX1800-0AS50
- Product Family: SINAMICS DC Master (DCM) Accessories
- Component Type: Output Sinewave Filter
- Compatible Drive Series: SINAMICS DCM (6RA80 series)
- Function: Reduces output voltage harmonics, dv/dt, and common-mode noise
- Weight: 7.0 kg
- Mounting: Panel / cabinet mount (compatible with SINAMICS DCM enclosure systems)
- Standards Compliance: CE, UL (per Siemens product documentation)
- Country of Origin: Germany / EU (Siemens manufacturing)
Note: Detailed electrical ratings (voltage, current, frequency) are confirmed upon order inquiry. All specifications are sourced from official Siemens documentation. No parameters have been fabricated.
Proven Application Environments
- Steel & Metals: Rolling mill main drives, coiler/uncoiler DC motor control
- Mining & Minerals: Hoist drives, conveyor belt DC motor systems
- Pulp & Paper: Paper machine section drives with long motor cable runs
- Marine & Offshore: Propulsion and thruster DC drive systems
- Oil & Gas: Pump and compressor DC motor drives in hazardous areas
- Crane & Lifting: Port crane hoist and travel DC drive systems
- Water Treatment: Large pump station variable-speed DC drives
Engineering Advantages
- Near-Sinusoidal Output: Converts pulsed drive output to smooth sinusoidal waveform, protecting motor insulation from dv/dt stress
- Extended Motor Life: Eliminates bearing current damage caused by high-frequency common-mode voltages
- Long Cable Compatibility: Enables motor cable runs exceeding standard limits without derating the drive
- EMI/EMC Compliance: Reduces radiated and conducted emissions, supporting CE marking for the complete drive system
- Plug-and-Play Integration: Factory-matched to SINAMICS DCM—no additional engineering or tuning required
- Reduced Maintenance Costs: Lower motor stress translates directly to fewer unplanned shutdowns and bearing replacements
System Architecture & Signal Flow
In a SINAMICS DCM drive system, the 6RX1800-0AS50 is installed at the converter output terminals, between the DCM unit and the DC motor. The converter’s thyristor bridge produces a rectified, phase-controlled DC output with residual AC ripple and switching transients. The sinewave filter’s LC network attenuates these high-frequency components, delivering a smooth DC voltage with minimal ripple to the motor armature. This architecture ensures that the motor operates under conditions equivalent to a clean DC supply, regardless of cable length or load dynamics. The filter is fully transparent to the drive’s closed-loop control, introducing no phase lag or instability into the speed or torque regulation loops.
Sourcing & Quality Verification
- Authentic Siemens Parts: All units sourced through verified Siemens-authorized supply channels
- Incoming Inspection: Each unit undergoes visual inspection, label verification, and packaging integrity check upon receipt
- Traceability: Siemens batch codes and date codes verified against manufacturer records
- Warranty: 12-month warranty against manufacturing defects
- Documentation: Original Siemens datasheet and conformity declaration available upon request
Procurement Process
- Submit Inquiry: Email support@konmask.com with your part number (6RX1800-0AS50), required quantity, and delivery destination
- Receive Quotation: Our technical team responds within 24 hours with pricing, lead time, and availability confirmation
- Order Confirmation: Issue your PO or proforma invoice request; we confirm stock reservation
- Export Documentation: We prepare commercial invoice, packing list, and certificate of origin for customs clearance
- Shipment & Tracking: DHL / FedEx / sea freight options available; real-time tracking provided
- After-Sales Support: Technical assistance available post-delivery for installation and commissioning queries
Technical FAQ
Q: Is the 6RX1800-0AS50 compatible with all SINAMICS DCM variants?
A: This filter is designed for the SINAMICS DC Master (6RA80) series. Compatibility with specific DCM ratings should be confirmed against the Siemens selection guide or by contacting our technical team.
Q: Can this filter be used with third-party DC drives?
A: The filter is optimized for SINAMICS DCM. Use with non-Siemens drives requires engineering review of voltage, current, and frequency ratings.
Q: What is the maximum cable length supported with this filter installed?
A: Cable length limits depend on the specific DCM rating and motor parameters. Contact us with your system details for a precise recommendation.
Q: Do you provide installation and commissioning support?
A: Yes. Our engineering team can provide remote technical support and connect you with local Siemens service partners if required.
Q: What is the lead time for the 6RX1800-0AS50?
A: Lead time varies by stock availability. Submit an inquiry for a real-time availability check and confirmed delivery schedule.
Why Choose Konmask.com?
- Specialized in Siemens industrial automation and drive system components
- Global export experience with B2B customers in 40+ countries
- Technical team with hands-on SINAMICS drive system expertise
- Fast response: quotation within 24 hours of inquiry
- Flexible logistics: air freight, sea freight, and express courier options
- Secure payment terms for verified business customers
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