Shielded Control Cables (KVVP Series): Technical Parameters, Electrical Performance, Structures & Applications Explained

What Are Shielded Control Cables?

Shielded control cables are widely used for signal transmission and control systems in industrial automation and electrical equipment. Typical models include:

• KVVP: Copper core PVC insulated PVC sheathed copper tape shielded control cable

• KVVRP: Flexible shielded control cable

• KVVP22: Steel tape armored shielded control cable

These cables are designed according to GB/T 9330-2008 standard, and flame-retardant versions may comply with IEC 60332-3 (IEC 337-8) requirements.

They are mainly used for electrical control, instrumentation, and signal transmission systems.

Electrical and Mechanical Performance Parameters

1. DC Resistance

At 20°C temperature:

• 0.4 mm copper conductor: ≤ 148 Ω/km

• 0.5 mm copper conductor: ≤ 95 Ω/km

This ensures stable signal transmission with low power loss.

2. Dielectric Strength

• Between conductors: 1 kV / 1 min, no breakdown

• Between conductor and shield: 3 kV / 1 min, no breakdown

This guarantees safe operation under rated voltage conditions.

3. Insulation Resistance

• Control cables: ≥ 10,000 MΩ·km

• HYAT cables: ≥ 3,000 MΩ·km

High insulation resistance ensures excellent electrical isolation and long-term reliability.

4. Working Capacitance

• Average value: 52 ± 2 nF/km

This parameter ensures stable signal transmission performance in long-distance control systems.

5. Far-End Crosstalk Protection

• At 150 kHz: ≥ 69 dB/km

High anti-interference capability ensures accurate signal transmission in industrial environments.

Rated Voltage & Temperature Performance

• Rated voltage: 450/750V

• Long-term operating temperature: 70°C or 95°C options

• Installation temperature: not lower than 0°C

These properties make shielded control cables suitable for both indoor and industrial environments.

Bending Radius Requirements

Proper installation is critical to maintain cable performance:

• Non-armored cable: ≥ 6 × outer diameter

• Armored or copper tape shielded cable: ≥ 12 × outer diameter

• Flexible shielded cable: ≥ 6 × outer diameter

Cable Structure & Design

Typical structure includes:

• Conductor (copper)

• PVC insulation

• Shielding layer (copper tape or braided shield)

• Inner filling (optional)

• Outer PVC sheath

This structure provides excellent electromagnetic interference (EMI) protection.

Core Counts & Common Sizes

• Core range: 2 cores to 61 cores

• Common production range: 2 to 37 cores

Standard conductor sizes:

• 0.75 mm²

• 1.0 mm²

• 1.5 mm²

• 2.5 mm²

• 4 mm²

• 6 mm²

Applications of Shielded Control Cables

KVVP series cables are widely used in:

• Industrial automation systems

• Power station control systems

• Instrumentation and monitoring systems

• Manufacturing production lines

• Petrochemical plants

• Building electrical control systems

• Communication and signal transmission networks

They are especially suitable for environments with strong electromagnetic interference (EMI).

Key Advantages

• Strong anti-interference performance (EMI shielding)

• Stable signal transmission over long distances

• High insulation resistance and safety performance

• Flexible structure options (armored / non-armored)

• Suitable for complex industrial environments

Conclusion

Shielded control cables (KVVP series) are essential components in modern industrial automation and electrical control systems. With excellent electrical performance, strong shielding capability, and wide application adaptability, they are widely used in power, manufacturing, and infrastructure projects.