Rated Voltage 0.6/1 kV and Below XLPE Insulated PVC Sheathed (Flame Retardant, Fire-Resistant) Control Cable (KYJV Series)

Executive Standards
- Q/320481SS008-2023: Enterprise-specific technical standard (core basis).
- GB/T 19666: General rules for flame retardant and fire-resistant wires and cables (covering combustion characteristics).

Model Code Definitions
- K: Control cable series.
- YJ: Cross-linked polyethylene (XLPE) insulation.
- V: Polyvinyl chloride (PVC) sheath.
- R: Flexible conductor construction (stranded fine copper wires).
- P / P2 / P3 / P4: Shielding structure (e.g., P-copper wire braid; P2-copper tape wrap; P3-aluminum/plastic composite tape wrap).
- 22 / 32: Armoring structure (22-double steel tape armor; 32-fine steel wire armor).
- Z(A/B/C): Flame retardant property code (Class A/B/C flame retardant).
- N: Fire-resistant property code (maintains circuit continuity under fire).

Product Specification Range
The conductor uses high-quality annealed copper wire, with a wide specification range that can meet the wiring needs of large and complex control systems:
1. (2–61) cores × (0.5–2.5) mm²
2. (2–37) cores × (4, 6) mm²
3. (2–7) cores × 10 mm²

Core Technical Parameters
1. Rated voltage (U₀/U): 600/1000 V (i.e., 0.6/1 kV).
2. Rated operating temperature:
   - Maximum continuous permissible conductor operating temperature: 90°C.
   - Maximum conductor temperature during short circuit (max. 5 s): 250°C.
3. Ambient temperature requirements:
   - Ambient temperature during installation should not be lower than 0°C; preheating is required if below this temperature.
   - Minimum temperature for storage and fixed installation use is typically not lower than -15°C.
4. Bending radius:
   - Non-armored and flexible cable constructions: generally not less than 6 times the cable outer diameter.
   - Armored or shielded cables: generally not less than 12 times the cable outer diameter.

Product Structural Characteristics
- High-performance insulation layer: XLPE material has a three-dimensional network molecular structure, giving the cable outstanding mechanical and physical properties and strong chemical corrosion resistance.
- Multiple shielding options: For environments sensitive to electromagnetic interference, high-coverage metal wire braid (P) or copper tape wrap (P2) shielding can be configured to effectively ensure the purity of control signals.
- Fire-resistant safety barrier (N type): Fire-resistant types are wrapped with high-performance mica tape over the conductor, ensuring circuit integrity is maintained for at least 90 minutes under fire high temperatures (e.g., 750°C–1000°C).
- Enhanced physical protection: The PVC outer sheath provides good mechanical strength, flame retardant properties, and moisture resistance. Armored types further resist external mechanical pressure and tensile forces.

Applicable Scenarios
- Medium/low voltage substation control: Serving as the backbone connection for remote operation, control, and monitoring circuits.
- Petrochemical and large industrial/mining applications: Suitable for environments with high temperature rise requirements and the presence of certain mechanical stress or corrosion risks.
- Rail transit and hub construction: Used for fire protection, power monitoring, and emergency backup systems in large public facilities such as subways and airports.
- Intelligent factories: Supplying high-grade power control to variable frequency drive systems and precision production line control cabinets.

Selection, Installation, and Maintenance Recommendations
1. Current-carrying capacity margin: Due to the heat resistance of XLPE (90°C), the KYJV series has a larger safe current-carrying margin than the conventional KVV series under the same cross-section.
2. Anti-interference selection: When routing near strong electric fields or variable frequency drives, priority should be given to types with shielding codes (P, P2).
3. Direct burial and protection: For direct underground burial or vertical installation (e.g., in shafts), steel tape armored (22) or steel wire armored (32) products should be selected.
4. End treatment: During installation, ensure the sealing of cable joints to prevent moisture ingress into the cable core, which could degrade insulation performance.