Description
Used product. Schaffner FS21884-140-07-1 EMC/RFI filter, specifically intended for use in the PV-Field → Inverter connection. The component is designed to suppress high-frequency electromagnetic interference present on the DC lines of photovoltaic systems, helping to reduce conducted interference toward the inverter and the photovoltaic field.
⚙️ Technical Specifications
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Brand: Schaffner
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Model: FS21884-140-07-1
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Type: DC EMC/RFI filter
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Nominal voltage: 900 VDC
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Rated current: 140 A @ 55°C
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Climatic category: 25/100/21
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Application: PV-Field / Inverter
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Connection: cable version
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Polarity: + / −
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PE: protective earth connection
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Construction: shielded metal enclosure, with integrated power wiring.
The FS21884 family includes configurations specifically designed for photovoltaic applications; Schaffner documentation identifies the photographed version as FS21884-140-07-1.
⚡ Function in the Photovoltaic System
The filter is installed in series between the photovoltaic field and the inverter, respecting the polarity indicated on the enclosure.
Its main function is to attenuate conducted interference and high-frequency components generated mainly by the inverter switching stages. In this way, it contributes to the electromagnetic compatibility of the system and limits the propagation of interference along the DC lines.
The marking on the component clearly distinguishes the two sides:
PV-Field → photovoltaic field side
Inverter → inverter side.
🏭 Construction and Installation
The filter features a robust Schaffner metal enclosure, with power connections through high-gauge cables and a dedicated PE connection.
The construction is suitable for industrial and high-power photovoltaic applications. The FS21884 series is documented by Schaffner as an EMC filter family; the exact code FS21884-140-07-1 is also associated with Schaffner code 811793.
🌐 Applications
Suitable for:
- photovoltaic inverters
- high-power PV systems
- high-voltage DC lines
- EMC/RFI interference reduction between the PV field and inverter
- retrofit and replacement of equivalent Schaffner filters, subject to verification of electrical and mechanical compatibility.
🛡️ Safety and Product Condition
The component is used and shows scratches, abrasions, and normal signs of previous installation on the enclosure, visible in the photographs. The cables and terminals show signs of use, but the assembly appears complete.
Attention: 900 VDC and 140 A represent extremely dangerous electrical levels. Before any intervention, the PV field must be completely disconnected, absence of voltage must be verified, and possible residual energy must be considered. Installation must only be carried out by qualified personnel.
📦 Package Contents
- 1 × Schaffner FS21884-140-07-1
- complete filter with power wiring and PE connections as visible in the photographs.
🚀 Final Description
The Schaffner FS21884-140-07-1 is a 900 VDC / 140 A @55°C high-power DC EMC/RFI filter, designed for PV-Field/Inverter applications. Its metal construction and power connections make it suitable for use in industrial photovoltaic systems where it is necessary to limit the propagation of electromagnetic interference on DC lines. The exact photographed code is FS21884-140-07-1, with Schaffner reference 811793.
