Product Overview
NH-KGG/NH-KFG series silicone fire-resistant control cables deliver critical circuit protection in life-safety systems during extreme fire events. Engineered for 450/750V control circuits, these cables maintain operational integrity for ≥3 hours at 750°C+ flames while resisting temperatures from -50°C to +180°C. Featuring all-silicone or fluoroplastic-silicone hybrid construction with optional shielding/armoring, they ensure uninterrupted power for fire pumps, emergency lighting, elevator communications, and signal systems in high-risk environments.
Key Features & Benefits
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Fire Survival: Guaranteed ≥3 hours circuit integrity at 750-1000°C (IEC 60331)
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Extreme Temperature Range: -50°C to +180°C continuous operation
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Toxic Gas Prevention: Halogen-free, low-smoke (IEC 60754-1/2)
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Multi-Hazard Resistance: Flame retardant (IEC 60332-3), UV/ozone/radiation/waterproof
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Mechanical Resilience: Withstands crushing (steel armor) and chemical corrosion
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EMI Protection: Copper braid/tape shielding for signal-critical systems
Critical Applications
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Emergency power circuits in high-rise buildings
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Fire pumps & elevator communication systems
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Petrochemical refineries & offshore platforms
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Power plants & nuclear facilities
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Subway tunnels & mining operations
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Steel mills & smelting furnaces
Cable Construction
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Conductor:
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High-purity copper core (tinned for corrosion resistance)
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Insulation:
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NH-KGG: Industrial-grade silicone rubber
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NH-KFG: Fluoroplastic (superior chemical/thermal stability)
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Shielding (Optional):
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Braided copper (P) or copper tape (P2)
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Armoring (Optional):
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Steel tape (22) or steel wire (32)
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Outer Sheath:
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Reinforced silicone rubber (abrasion/chemical resistant)
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Product Matrix & Selection Guide
| Model | Construction | Key Applications | Fire Integrity |
|---|---|---|---|
| NH-KGG | Silicone core/sheath | Fixed indoor installations | ≥3h @ 750°C |
| NH-KGGP | + Copper braid shielding | EMI-sensitive control rooms | ≥3h @ 750°C |
| NH-KGG22 | + Steel tape armor | Direct burial, high-crush zones | ≥3h @ 750°C |
| NH-KGGRP | Flexible + shielding | Mobile fire systems, robotic arms | ≥3h @ 750°C |
| NH-KFG | Fluoroplastic core + silicone sheath | Acid/alkali exposure areas | ≥3h @ 950°C |
| NH-KFGP-22 | Shielding + steel armor | Nuclear plants, submarine tunnels | ≥3h @ 950°C |
Technical Specifications
| Parameter | Value | Test Standard |
|---|---|---|
| Rated Voltage | 450/750V AC | IEC 60502-1 |
| Fire Resistance | ≥3h circuit integrity (750-950°C) | IEC 60331/BS 6387 |
| Temp Range | -50°C to +180°C (continuous) | IEC 60811 |
| Bending Radius | ≥6 × cable diameter | IEC 60273 |
| Flame Propagation | Cat. A (≤2.5m damage) | IEC 60332-3 |
| Smoke Density | ≤60 (IEC 61034) | IEC 61034-2 |
| Acid Gas Emission | pH ≥4.3, conductivity ≤10μS/mm | IEC 60754-2 |
Material Performance
| Component | Advantage |
|---|---|
| Silicone Rubber | Maintains elasticity at -50°C; self-extinguishing at 180°C |
| Fluoroplastic | Resists acids/alkalis at 200°C+; lower smoke emission |
| Copper Shielding | 95% EMI attenuation (100kHz-1GHz) |
| Steel Armor | Withstands 4000N crush force (IEC 60229) |
Engineering Selection Criteria
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Fire Scenario:
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Standard fire: NH-KGG series (750°C)
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Extreme hydrocarbon fire: NH-KFG series (950°C)
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Movement Requirements:
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Fixed routes: KGG/KFG models
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Dynamic systems: KGGR/KFGR models (flex life: >20,000 cycles)
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Environmental Threats:
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Chemical exposure: Fluoroplastic-core (NH-KFG)
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EMI interference: P/P2 shielded models
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Crush/rodent risk: 22/32 armored variants
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Certifications:
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Mandatory: CE, RoHS 3.0, IEC 60331
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Optional: UL 2196, BS 7846, EN 50200
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Installation Note: Minimum bending radius = 6D. Use ceramic guides in high-temperature zones (>150°C). Armored cables require gland plates meeting IEC 62444.
Compliance: Exceeds IEC 60331-21/25, IEC 60754-1/2, and EN 50200 for PH30/90/120 fire ratings. Custom configurations available for nuclear/offshore applications.