Superior EMC Performance for Marine VFD Applications: A Comprehensive Guide to Feichun M2XCH-EMC Cables

Eliminating EMI in Marine VFD Systems: The Feichun M2XCH-EMC Cable Solution

When it comes to marine applications, particularly those involving Variable Frequency Drives (VFDs), electromagnetic interference (EMI) is a critical concern.

For over a decade, Feichun has been at the forefront of delivering specialized cabling solutions designed to address this issue and ensure the efficient, safe operation of electrical systems in challenging environments.

The Feichun M2XCH-EMC 1,8 / 3 (3,6) kV cable is a standout example of this commitment to high-performance and reliability.

Designed primarily as a motor supply cable for frequency converter-controlled low-voltage AC drives (VFDs) on ships, the M2XCH-EMC provides exceptional electromagnetic compatibility (EMC).

With superior shielding to minimize EMI, this cable ensures optimal VFD performance and long-term durability in harsh marine conditions.

The M2XCH-EMC cable is built for medium voltage applications, making it ideal for various electromechanical and electronic equipment installations.

With its high-performance shielding and rugged construction, it guarantees stable operation and compliance with industry standards, safeguarding sensitive onboard systems.

This guide will provide an in-depth look at the M2XCH-EMC cable’s construction, technical specifications, installation guidelines, and troubleshooting tips, giving engineers and installers the knowledge they need to maximize performance in their marine VFD systems.

The Critical Role of EMC in Marine VFD Systems and the M2XCH-EMC Solution

Addressing the Complex EMC Challenges of Marine VFD Installations

VFDs are essential for controlling the speed and torque of motors in many marine applications.

However, these devices can generate high-frequency switching noise that, if not properly controlled, can cause significant EMI. This interference can disrupt surrounding electronic systems, including sensitive navigation, communication, and control equipment, posing a safety risk to vessels and their operations.

One major source of EMI in VFD systems is common-mode currents, which can cause ground loops and exacerbate interference. These currents often flow along the cable shields and, without proper shielding, can radiate into the environment, affecting critical systems and leading to malfunctions.

The Feichun M2XCH-EMC cable addresses these issues head-on by offering advanced shielding designed to reduce EMI to a minimum. Its superior EMC performance ensures that sensitive onboard systems remain free from interference, maintaining the safety and reliability of the vessel's operations.

With the increasing demand for high-performance VFDs in the marine industry, it is essential to use cables that are not only capable of managing the electrical demands but also designed to combat EMI. The M2XCH-EMC cable provides the solution to these challenges, offering a robust and effective means of ensuring electromagnetic compatibility (EMC).

Technical Specifications and Standards Compliance

Engineered for Superior EMC Performance: Technical Specifications

The Feichun M2XCH-EMC cable is designed to meet and exceed international standards, making it a reliable choice for marine installations. Below are the key technical specifications and standards compliance details:

• Construction Standard: IEC 60092 / 353, a standard for marine electrical installations.

• Tests and Material Standards: IEC 60092 / 350-360, covering electrical, mechanical, and environmental testing.

Conductor:

Material: Electrolytic, stranded, annealed copper wire (IEC 60228 Class 2; Class 5 and/or tinned on request).

Class 2: Standard copper conductor for general use.

Class 5: Flexible copper conductor for easier installation in confined spaces.

Tinning: Optional for corrosion resistance and improved conductivity.

Insulation:

• Material: Cross-linked polyethylene (XLPE) compound. XLPE provides excellent electrical properties, resistance to high temperatures, and protection against voltage spikes and partial discharges.

Inner Covering:

• Material: Separating foil and/or halogen-free compound, offering additional insulation and mechanical protection.

Enhanced Shielding:

Material: Copper/polyester tape (100% coverage) and copper wire braided screen (min. 90% coverage).

Copper/polyester tape (100% coverage): Offers exceptional high-frequency shielding effectiveness, essential for mitigating switching noise from VFDs.

Copper wire braided screen (min. 90% coverage): Provides robust mechanical protection and shields against low-frequency noise.

Optional: Tinned copper wire braid (for enhanced corrosion resistance).

Outer Sheath:

Material: Halogen-free, flame retardant, UV resistant, polyolefin-based compound (SHF1).

Halogen-free: Reduces toxic fumes and corrosive gases in case of fire.

Flame retardant: Meets stringent fire safety standards.

UV resistant: Prevents degradation from exposure to sunlight.

SHF 1: Specifies the material’s flame retardancy and low smoke emission.

Electrical Characteristics:

• Rated Voltage: 1.8 / 3 (3.6) kV.

• Test Voltage: 6.5 kV.

Environmental and Mechanical Properties:

• Working Temperature: -40°C to +90°C.

• Minimum Bending Radius (Fixed): 6xD (6 times the cable’s overall diameter).

• Flame Retardancy: IEC 60332 / 1-2, IEC 60332 / 3-22 Cat A.

• Ozone Resistance: IEC 60811 / 403.

• UV Resistance: EN 50289-4-17 A&B, ISO 4892-2&3.

• Shielding Effectiveness: DIN EN 50147-1. This standard ensures high shielding effectiveness across a relevant frequency range, providing excellent protection against EMI.

Installation Guidelines and Best Practices for Enhanced EMC Performance

Achieving Optimal EMC Performance: Installation Recommendations

Proper installation is crucial for ensuring the Feichun M2XCH-EMC cable delivers the best possible EMC performance.

The following best practices are recommended for achieving optimal results:

Minimum Installation Temperature: The cable should be installed at temperatures no lower than -15°C to avoid damaging the cable's components during installation.

Cable Handling: Handle the cable carefully to avoid damaging the shielding layers. The integrity of the shielding is critical to maintaining effective EMI protection.

Cable Routing: Follow these guidelines to minimize EMI:

Keep VFD cables separated from sensitive cables (e.g., signal, communication, or data cables).

Avoid parallel runs with other cables whenever possible.

Minimize the length of the VFD cables.

Use dedicated cable trays or conduits for VFD cables.

Ensure proper grounding to minimize ground loops.

Bending Radius: Adhere to the minimum bending radius of 6xD to prevent mechanical stress on the cable and to maintain its shielding effectiveness.

Termination and Connection:

Use appropriate EMC cable glands and connectors to ensure a continuous, low-impedance shield connection.

Employ proper shield termination techniques: Ensure 360° shield termination at both the drive and motor ends to maximize shielding effectiveness.

Use low-impedance grounding and bonding methods to connect to the vessel’s grounding system.

Troubleshooting and Maintenance (EMC Focus)

Maintaining EMC Performance: Troubleshooting and Best Practices

To ensure that the Feichun M2XCH-EMC cable continues to deliver optimal performance, it’s essential to address common installation mistakes and to troubleshoot potential EMC issues:

Common Installation Mistakes:

Improper shield termination (e.g., pigtail connections).

Inadequate grounding or bonding.

Incorrect cable routing.

Troubleshooting EMC Issues:

Interference with Other Equipment: Use spectrum analyzers or other diagnostic tools to measure EMI and identify interference sources.

Motor Noise or VFD Issues: Poor EMC performance may contribute to motor noise or other VFD-related issues. Check the shield connections and grounding system to troubleshoot.

Technical Information (Tables and Data)

Detailed Technical Specifications for Feichun M2XCH-EMC Cables

Conclusion

The Feichun M2XCH-EMC cable is the ideal solution for mitigating electromagnetic interference (EMI) in marine VFD systems. With its advanced shielding, superior construction, and strict compliance with international standards, it ensures that critical onboard systems are protected from EMI, leading to more efficient and reliable operations.

By following best practices for installation, maintenance, and troubleshooting, operators can maximize the cable's performance and extend its lifespan, ensuring continued safety and reliability for marine applications.

Note: This is just part of the standard parameters of our products. Please contact our Engineer if you need more. And the information contained within this webpage is for guidance only and is subject to change without notice or liability. All dimensions and specifications are nominal and are subject to normal manufacturing tolerances. All pictures shown are for illustration purposes only. The actual product may vary. All the information is provided in good faith and is believed to be correct at the time of publication.