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EMI attenuation

10 Min Read
AS/NZS 1802 (Australian/New Zealand Standard 1802) establishes the technical requirements for flexible mining cables used in underground and open-pit mining operations across Australia, New Zealand, and the broader Pacific region. Type 241 within this standard designates unarmoured flexible power cables rated at 0.6/1 kV with a Class 5 copper conductor, suitable for mobile mining equipment and drag cable applications. The standard was initially published in 1993 and has been progressively updated (most recently 2019) to incorporate advances in materials science and safety requirements. AS/NZS 1802 Type 241 employs a single-core earth architecture: the cable contains one dedicated protective earth conductor of specified cross-section, positioned at a fixed location within the cable cross-section (typically at the "6 o'clock" position relative to the three phase conductors at 12, 4, and 8 o'clock). This single-core design reflects a pragmatic engineering philosophy: the earth conductor is sized to carry fault currents, provide equipotential grounding for equipment frames, and enable protective relay operation in the event of phase-to-frame faults.
Technical Department
on20/05/2026

AS/NZS 1802 Type 241 vs. VDE 0250: Complete Earthing Differences Guide

AS/NZS 1802 (Australian/New Zealand Standard 1802) establishes the technical requirements for flexible mining cables used in underground and open-pit mining operations across Australia, New Zealand, and the broader Pacific region. Type 241 within this standard designates unarmoured flexible power cables rated at 0.6/1 kV with a Class 5 copper conductor, suitable for mobile mining equipment and drag cable applications. The standard was initially published in 1993 and has been progressively updated (most recently 2019) to incorporate advances in materials science and safety requirements. AS/NZS 1802 Type 241 employs a single-core earth architecture: the cable contains one dedicated protective earth conductor of specified cross-section, positioned at a fixed location within the cable cross-section (typically at the “6 o’clock” position relative to the three phase conductors at 12, 4, and 8 o’clock). This single-core design reflects a pragmatic engineering philosophy: the earth conductor is sized to carry fault currents, provide equipotential grounding for equipment frames, and enable protective relay operation in the event of phase-to-frame faults.
1 Min Read
GAALFLEX® CONTROL 500 CP Lean: Advanced EMI-Suppressed Oil-Resistant Multi-Core Control Cable for Harsh Industrial Environments (300/500 V Nominal, 3 kV Test Voltage per DIN VDE 0281, −40 to +80°C Fixed Installation / −5 to +70°C Flexible Application, Class 5 Flexible Red Bare Copper per IEC 60228 and DIN VDE 0295, PETP Foil Wrapping Plus Overall Tinned Copper Wire Braid Screen Providing ≥85 dB EMI Attenuation Across Industrial Frequency Spectrum, Grey PUR Special Compound Outer Sheath (RAL 7001) Delivering Superior Oil Resistance
Technical Department
on07/05/2026

GAALFLEX® CONTROL 500 CP Lean

GAALFLEX® CONTROL 500 CP Lean: Advanced EMI-Suppressed Oil-Resistant Multi-Core Control Cable for Harsh Industrial Environments (300/500 V Nominal, 3 kV Test Voltage per DIN VDE 0281, −40 to +80°C Fixed Installation / −5 to +70°C Flexible Application, Class 5 Flexible Red Bare Copper per IEC 60228 and DIN VDE 0295, PETP Foil Wrapping Plus Overall Tinned Copper Wire Braid Screen Providing ≥85 dB EMI Attenuation Across Industrial Frequency Spectrum, Grey PUR Special Compound Outer Sheath (RAL 7001) Delivering Superior Oil Resistance
6 Min Read
FeiChun FLEXIDRUM® MEDIUM Water Cables with Core Copper Screen (3E Architecture): Advanced Electromagnetic Shielding & Submersion Power Transmission (1.8–18/30 kV) for Dredging Equipment, Pumping Systems & Underwater Electronics: Comprehensive Technical Analysis of Individual Tinned Copper Core Screening Architecture Providing Electromagnetic Interference (EMI) Suppression for Sensitive Control Electronics in Aquatic Environments, Ground Loop Elimination Through Distributed Copper Screen Design Preventing Conducted & Radiated Noise Coupling to Sensor/Control Signal Pathways, Water-Resistant Screening Materials (Tinned Copper) Preventing Galvanic Corrosion of Shield Components in Freshwater/Saltwater/Brackish Water Environments, Multi-Voltage Screening Variants (MR/KR/QR/SR/WR/UR/XR) Addressing Diverse Dredging & Pumping Equipment Architecture Requirements, Complete Electromagnetic Compatibility (EMC) Framework Enabling Integration of Cable Systems into Modern Dredger/Pump Control Architectures with Real-Time Monitoring & Automated Equipment Control, Field-Proven 15+ Year Submersion Performance with Integrated Shielding Maintaining Effectiveness Throughout Service Life, Comparative Analysis vs. Unscreened & Standard Marine Shielded Alternatives, and Advanced Procurement Strategy for Complex Aquatic Equipment Systems Requiring Simultaneous Waterproofing & Electromagnetic Compatibility in Harsh Submersion Environments Modern dredging and underwater pumping equipment increasingly integrates automated control systems, real-time monitoring electronics, and distributed sensor networks requiring reliable signal transmission in electromagnetically hostile aquatic environments: high-voltage power conductors generating strong electromagnetic fields (12/20 kV and 18/30 kV systems produce 500–2000 V/m field strengths), continuous water contact creating conductive pathways enabling ground-loop formation, saltwater environments with inherent conductivity (~50,000 μS/cm) establishing electrochemical noise coupling mechanisms, and distributed equipment separated by long cable runs creating antenna-loop configurations amplifying EMI effects. FeiChun's FLEXIDRUM® MEDIUM water cables with core copper screen (3E architecture) address these unified power-control integration challenges through individual tinned copper screen conductors encircling each power core, creating Faraday-cage-equivalent shielding suppressing EMI penetration to power conductor pathways, ground-return architecture enabling proper grounding preventing ground-loop formation, water-resistant screening materials (tinned copper) preventing shield corrosion throughout multi-decade submersion service life, and integrated screening design maintaining electromagnetic effectiveness simultaneously with complete waterproofing.
Technical Department
on27/04/2026

FLEXIDRUM® MEDIUM (N)TSCGEWÖU WATER…/3E

FeiChun FLEXIDRUM® MEDIUM Water Cables with Core Copper Screen (3E Architecture): Advanced Electromagnetic Shielding & Submersion Power Transmission (1.8–18/30 kV) for Dredging Equipment, Pumping Systems & Underwater Electronics: Comprehensive Technical Analysis of Individual Tinned Copper Core Screening Architecture Providing Electromagnetic Interference (EMI) Suppression for Sensitive Control Electronics in Aquatic Environments, Ground Loop Elimination Through Distributed Copper Screen Design Preventing Conducted & Radiated Noise Coupling to Sensor/Control Signal Pathways, Water-Resistant Screening Materials (Tinned Copper) Preventing Galvanic Corrosion of Shield Components in Freshwater/Saltwater/Brackish Water Environments, Multi-Voltage Screening Variants (MR/KR/QR/SR/WR/UR/XR) Addressing Diverse Dredging & Pumping Equipment Architecture Requirements, Complete Electromagnetic Compatibility (EMC) Framework Enabling Integration of Cable Systems into Modern Dredger/Pump Control Architectures with Real-Time Monitoring & Automated Equipment Control, Field-Proven 15+ Year Submersion Performance with Integrated Shielding Maintaining Effectiveness Throughout Service Life, Comparative Analysis vs. Unscreened & Standard Marine Shielded Alternatives, and Advanced Procurement Strategy for Complex Aquatic Equipment Systems Requiring Simultaneous Waterproofing & Electromagnetic Compatibility in Harsh Submersion Environments Modern dredging and underwater pumping equipment increasingly integrates automated control systems, real-time monitoring electronics, and distributed sensor networks requiring reliable signal transmission in electromagnetically hostile aquatic environments: high-voltage power conductors generating strong electromagnetic fields (12/20 kV and 18/30 kV systems produce 500–2000 V/m field strengths), continuous water contact creating conductive pathways enabling ground-loop formation, saltwater environments with inherent conductivity (~50,000 μS/cm) establishing electrochemical noise coupling mechanisms, and distributed equipment separated by long cable runs creating antenna-loop configurations amplifying EMI effects. FeiChun’s FLEXIDRUM® MEDIUM water cables with core copper screen (3E architecture) address these unified power-control integration challenges through individual tinned copper screen conductors encircling each power core, creating Faraday-cage-equivalent shielding suppressing EMI penetration to power conductor pathways, ground-return architecture enabling proper grounding preventing ground-loop formation, water-resistant screening materials (tinned copper) preventing shield corrosion throughout multi-decade submersion service life, and integrated screening design maintaining electromagnetic effectiveness simultaneously with complete waterproofing.