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1. Overview of VG 95218-66 

**VG 95218-66** defines the technical specifications for a specialized type of cable used in **demanding environments**, such as military, aviation, and industrial applications. It ensures cables are reliable, durable, and safe under extreme conditions.

Key Characteristics: 

• Double Screened: Enhanced protection against EMI and RFI (Radio Frequency Interference).
• Halogen-Free Materials: Reduces the release of toxic gases and corrosive fumes in fires.
• Low Fire Hazard: Limits flame spread, smoke production, and overall fire risks.
• Triple Formation: Three conductors arranged for signal integrity and reduced cross-talk.
• Robust Sheath: Provides mechanical protection and environmental resistance.

 

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2. Construction of VG 95218-66 Cables 

1. Conductor: 
- Typically made of **annealed copper**, which may be tinned for corrosion resistance. 
- Stranded construction ensures flexibility and durability. 

2. Insulation: 
- Made of **halogen-free materials**, ensuring minimal toxicity and compliance with environmental standards. 

3. Double Screening: 
- **Primary Screen**: Applied to individual conductors for EMI protection. 
- **Secondary Screen**: Applied to the entire cable assembly for enhanced shielding. 
- Materials include aluminum foil or braided copper for optimal shielding effectiveness.

4. Sheath: 
- Outer sheath made of halogen-free, flame-retardant polymer, offering protection from mechanical wear, UV radiation, and chemicals.

5. Triple Formation: 
- Three individually insulated and screened conductors twisted together to maintain signal integrity and minimize electromagnetic interference.

6. Halogen-Free, Low Fire Hazard Properties: 
- Reduces the spread of flames. 
- Minimizes smoke generation and release of corrosive gases, ensuring safety in enclosed environments like vehicles or control rooms.

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3. Applications of VG 95218-66 Cables 

These cables are designed for environments requiring high reliability, safety, and EMI protection. Common applications include:

• Military Applications: Wiring for vehicles, command systems, and communication devices.
• Aerospace and Aviation: Signal and power cables in aircraft and drones.
• Industrial Settings: Environments with high electromagnetic interference, such as factories or control rooms.
• Marine and Offshore Installations: Wiring for ships, submarines, and offshore platforms where fire safety is critical.
• Rail and Transportation: Electrical systems for trains, metros, and trams, ensuring reduced fire risks in tunnels or stations.

Example Use Case: 
In a **military vehicle**, VG 95218-66 cables are used to connect sensitive communication equipment, ensuring signal integrity even in environments with high EMI, while also meeting fire safety standards.

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4. Advantages of VG 95218-66 Cables 

1. Superior EMI Protection: 
- Double screening ensures minimal electromagnetic interference, critical for sensitive signal transmission. 

2. Enhanced Fire Safety: 
- Halogen-free materials reduce the spread of flames and smoke. 
- Minimizes corrosive gases, protecting life and equipment in confined spaces.

3. Durability: 
- Robust sheath and construction withstand harsh environmental conditions, including mechanical stress, chemicals, and UV radiation.

4. Signal Integrity: 
- Triple formation and individual screening reduce cross-talk and ensure consistent signal transmission.

5. Compliance with Standards: 
- Meets stringent military and industrial specifications for safety, reliability, and performance.

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5. Testing Requirements for VG 95218-66 Cables 

Cables conforming to **VG 95218-66** undergo rigorous testing to ensure compliance with performance and safety standards:

1. Electrical Tests: 
- **Insulation Resistance Test**: Ensures insulation maintains its integrity under voltage. 
- **Conductor Resistance Test**: Verifies the conductivity of the copper or tinned copper core. 

2. EMI Testing: 
- Tests the cable's shielding effectiveness against electromagnetic and radio frequency interference.

3. Fire Performance Tests: 
- Flame propagation tests to verify the cable limits flame spread. 
- Smoke density tests to confirm low smoke production. 
- Toxicity tests to measure emissions of halogen and corrosive gases.

4. Mechanical Tests: 
- Tensile and elongation tests for sheath and insulation materials. 
- Abrasion resistance tests for the sheath. 

5. Environmental Tests: 
- Resistance to UV radiation, temperature extremes, and moisture.

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6. Compliance and Standards 

Related Standards for VG 95218-66 Cables: 

 

Standard	Purpose
VG 95218	General series for military-grade electrical cables.
IEC 60332	Flame retardancy tests for fire-resistant cables.
EN 50267	Halogen acid gas measurement during combustion.
EN 61034	Measurement of smoke density during fire tests.

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7. Conclusion 

**VG 95218-66** specifies cables that combine high performance, reliability, and safety. These cables are designed for environments requiring superior electromagnetic shielding, fire safety, and mechanical durability, making them indispensable in **military, aerospace, and industrial applications**.

Key Takeaway: 
VG 95218-66 cables are engineered to deliver exceptional performance in demanding environments, ensuring safety, reliability, and compliance with stringent standards.

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