I. Mineral Insulated Fire-Resistant Cable (WTTEZ) Cable Structure:
1. Stranded conductor;
2. Inorganic composite insulation;
3. Inorganic composite expansion filler;
4. Corrugated copper tube sheath;
5. Low-smoke, halogen-free outer sheath;
Features of Mineral Insulated Fire-Resistant Cable (WTTEZ):
① Excellent fire resistance and fire resistance
To ensure the cable can function properly in flames, i.e., maintain structural stability under fire conditions, a fire-resistant and intumescent sheath is incorporated into the cable design. This sheath expands in volume under fire conditions, further stabilizing the cable insulation structure. This ensures that the cable can continue to provide power in fires near the melting point of copper, making it a truly fire-resistant cable.
② Long continuous production lengths, large cross-sections, and excellent bending properties
Long continuous production lengths
The production length of this cable is not limited by processing technology or production equipment, fully meeting power supply requirements. Production lengths up to 2000 meters are possible.
Large Cross-Section
This cable's conductor is constructed from multiple strands of twisted wire, significantly increasing its flexibility. Furthermore, twisted conductors offer excellent production continuity and long processing lengths, reducing the number of joints. The large cross-section of a single-core cable can reach up to 800mm².
Excellent Bendability
The copper sheath is corrugated, increasing the cable's flexibility and providing excellent bendability.
③ High Current Carrying Capacity and Waterproof
High Current Carrying Capacity
This cable can withstand a normal conductor temperature of 180°C. Given the same conductor cross-section, its current carrying capacity far exceeds that of conventional cables.
Waterproof
This cable is protected by a sealed non-magnetic metal tube, offering excellent waterproofing.
④ Explosion-proof, corrosion-resistant, and electromagnetically resistant
Explosion-proof
Because this cable uses a copper sheath, and the filler layer expands and compacts the core after combustion, flammable gases and flames cannot reach connected electrical equipment, making it explosion-proof.
Excellent Corrosion Resistance
Due to the excellent corrosion resistance of copper, no additional protection is required under normal operating conditions. However, in special environments, such as those with strong corrosion to copper, corrosion resistance can be achieved simply by adding a low-smoke, halogen-free outer sheath to the cable.
No Electromagnetic Interference
Because of the shielding of the copper sheath, this cable will not interfere with signal and control lines when installed alongside other cables.
II. Technical Comparison of WTTEZ Inorganic Composite Insulated Fire-Resistant Cable and BTTZ Mineral Insulated Cable
Project: Highly Flame-Retardant Fire-Resistant Cable, Mineral Insulated Cable (BTTZ), Inorganic Composite Mineral Insulated Cable (WTTEZ)
Combustion Performance: Flame Retardant (Class A): Non-flammable, Non-flammable
Smoke: Heavy smoke, Smokeless, Smokeless
Halogen: High halogen, Halogen-free, Halogen-free
Toxicity: Highly toxic, Non-toxic, Non-toxic
Fire Resistance: Meets Class B (750°C-800°C): 90 minutes; Exceeds Class A (950°C-1000°C): 3 hours; Exceeds Class A (950°C-1000°C): 5 hours
Spray Test: Failed, Passed, Passed
Vibration Test: Failed, Passed, Passed
Production Length Requirements: Unlimited, Each section shall not exceed 50 meters. Length is unlimited; no joints are required.
Laying Conditions: Unlimited, Fixed, non-removable Unlimited
III. Other Notes
WTTEZ (Inorganic Composite Insulated Fire-Resistant Cable) offers superior fire resistance, long production lengths, and excellent bending properties, making it a perfect alternative to BTTZ (Mineral Insulated Cable). It offers high-temperature resistance, excellent fire resistance, excellent bending properties, advanced manufacturing technology, and simple installation. Its dual stability in electrical insulation and cable structure under high-temperature fire conditions is unmatched by traditional mineral insulated cables. Furthermore, WTTEZ cable's advanced manufacturing process and simple installation make its overall cost significantly lower than that of mineral insulated cables (BTTZ) under comparable conditions.
