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Home Products Mineral insulated fire resistant cable

Mineral insulated fire resistant cable

Home Products Mineral insulated fire resistant cable

Mineral insulated fire resistant cable

[ Mineral insulated fire resistant cable ]

Mineral insulated fire resistant cable

[ Product Overview ]

Mineral insulated fireproof cable is a special cable that uses magnesium oxide (MgO) as insulation material and copper tube as sheath. It has excellent characteristics such as fire resistance, high temperature resistance, explosion-proof, smokeless and non-toxic. The product complies with international standards such as BS 6387 and GB/T 13033, and is the first choice cable for key places such as fire protection systems and emergency power supply.

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Product Details

Economical

Safe and Reliable

High Insulation Strength

Easy Installation

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Product Categories

model	name	conductor	insulation	jacket	Temperature grade
BTTZ	Heavy copper core and copper sheath	copper	Magnesium Oxide	copper	250℃
BTTVZ	Lightweight copper core and copper sheath	copper	Magnesium Oxide	copper	105℃
NG-A	Lightweight copper core copper sheathed cable	copper	Mica tape	aluminum	950℃
YTTW	Flexible copper sheathed cable	copper	Mica tape	copper	1000℃

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Technical Parameters

Electrical properties

The insulation resistance should be ≥1000MΩ・km under the test condition of 20℃ to ensure good insulation performance.

The voltage withstand test uses industrial frequency and requires a voltage of 3.5kV for 5 minutes to test the equipment's ability to withstand voltage.

The standard value of working capacitance is specified as ≤120pF/m. This test needs to be performed at a frequency of 1kHz to measure its capacitance characteristics under working conditions.

The above parameters and their corresponding standard values and test conditions are important indicators for evaluating electrical performance and are of key significance for ensuring the normal operation and safe use of equipment.

Fire performance

According to the BS 6387 test standard, under multiple harsh test conditions of 950℃ flame burning, mechanical vibration interference and water spray, after 3 hours of testing, it finally passed the test successfully and demonstrated excellent performance.

According to the IEC 60331 test standard, after continuous testing for 3 hours in a high temperature environment of 750°C, the device can still maintain a full power-on state, demonstrating good stability and reliability.

According to the GB 31247 test standard, the combustion calorific value is tested, requiring the combustion calorific value to be ≤1.8MJ/kg. The actual test results meet the standards and comply with relevant requirements.

These different test standards and their corresponding test conditions and results comprehensively and meticulously evaluate the performance of products in different dimensions, providing strong verification of product quality.

Mechanical environmental performance

In terms of tensile strength, the standard of BTTZ is ≥200N/mm², while the standard of NG-A is ≥150N/mm². In comparison, BTTZ has stronger tensile properties.

Regarding the bending radius, BTTZ is required to reach 6D, while NG-A is 10D, which means that BTTZ is superior to NG-A in bending flexibility and is easier to perform bending operations during construction.

The operating temperature parameters show that BTTZ can work normally in an environment of -40℃ to 250℃. The operating temperature range of NG-A is wider and it can operate stably in an environment of -40℃ to 1000℃. NG-A has a better ability to adapt to extreme temperatures.

In the face of a short circuit, both BTTZ and NG-A can withstand a high temperature of 1000°C for 5 seconds, and the two are comparable in their ability to withstand short-circuit temperatures.

BTTZ and NG-A have their own advantages and disadvantages in different parameters. BTTZ has advantages in tensile strength and bending radius, while NG-A has more advantages in operating temperature range. The same short-circuit temperature tolerance provides reliable protection for both in extreme circuit failures.

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Product Features

Absolutely fireproof

Passed 1000℃/3h fire resistance test (traditional cables only need 90min)

Smokeless and non-toxic when burning (smoke density ≤5%)

Super protection

Copper sheath waterproof and explosion-proof (IP68 protection grade)

Radiation and corrosion resistant (suitable for nuclear power plants)

Long-term stability

Expected lifespan: 50 years (common cables: 15-20 years)

Magnesium oxide insulation does not age

Intelligent monitoring

Optional integrated fiber optic temperature measurement system

Real-time monitoring of cable status

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Typical Applications

conductor:

Annealed copper (round/sector)

insulation:

High density magnesium oxide powder (BTTZ) or mica tape (NG-A)

jacket:

Copper tube (BTTZ, thickness 0.5-1.2mm)
Aluminum tube + PVC outer sheath (NG-A)

Section range:

1.5-400mm² (single core) / 1.5-25mm² (multi-core)

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Selection Guide

Choose according to fire resistance requirements

If you need to meet the 3-hour fire resistance requirement, it is recommended to use BTTZ type cable, which has been verified by the BS 6387 CWZ test standard and can maintain stable performance under the test of fire for a long time.

For scenarios where the fire resistance time requirement is 1.5 hours, NG-A cable is a suitable choice. It complies with the GB/T 19216 test standard and can ensure uninterrupted power transmission within the corresponding time.

The YTTW cable can meet the 1-hour fire resistance requirement and has been tested according to the IEC 60331 test standard. It can effectively ensure the normal use of the cable in a short-term fire environment.

Different cable models correspond to different fire resistance time requirements, and their quality is controlled through corresponding testing standards. The adaptation of these standards and models provides a scientific basis for cable selection in engineering design, helping to ensure the safety and reliability of the power system in fire scenarios.

Select by laying method

When faced with direct burial or underwater laying conditions, BTTZ cable becomes an ideal choice due to its copper sheath sealing characteristics. This sealing structure can effectively resist soil corrosion and water penetration, ensuring long-term and stable operation of the cable.

In the bridge laying scenario, NG-A cable stands out with its lightweight feature. Its lightweight material is not only easy to install and carry, but also reduces the bearing pressure of the bridge and improves the laying efficiency and safety.

YTTW cables are perfectly adapted to the needs of cable laying in mobile places due to their flexibility. Even in the case of frequent movement and bending, they can maintain good electrical performance and reduce the risk of failure caused by mechanical stress.

Different laying conditions have different requirements for cable performance. The above corresponding solutions are accurately matched according to the characteristics of each cable, providing reliable guarantees for various complex laying projects and effectively improving the stability and durability of the power transmission system.

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Installation Guidelines

Special tool requirements

A hydraulic end capping machine must be used

Moisture-proof sealing should be done immediately after cutting

Special tool requirements

Fixed spacing ≤ 1m (horizontal) / 0.8m (vertical)

Bending radius ≥ 6D (BTTZ) / 10D (NG-A)

Grounding requirements

Both ends of the copper sheath are grounded (grounding resistance ≤ 4Ω)

Use copper braid transition connection

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Quality Assurance

In terms of implementation standards, the project strictly follows GB/T 13033 and IEC 60702 standards to ensure that every link from product development to production meets the dual international and domestic regulatory requirements, ensuring the reliability and stability of product quality.

Regarding the warranty period, the project provides a warranty service of up to 10 years (including installation), covering the entire life cycle of the product. Whether it is a performance problem of the product itself or a quality defect related to the installation process, it will receive timely and professional after-sales guarantee.

In terms of certification, the project has obtained a number of authoritative certifications such as CE, UL, and CNAS. These certifications are comprehensive recognition of product safety, quality, and corporate management systems, demonstrating the project's competitiveness and credibility in the international market.

The above project commitments such as implementation standards, warranty period and certification fully reflect the project's strict control over quality and responsibility to customers, providing solid and reliable cooperation guarantees for partners and users.

[: 008 ]

Comparison with Traditional Solutions

In terms of fire resistance time, MI cable performs well, reaching ≥3 hours, while the fire resistance time of mica tape fireproof cable is relatively short, ≤1.5 hours. MI cable has more advantages under the long-term test of fire.

In terms of waterproof performance, MI cable has an IP68 waterproof standard and can adapt to extreme humid environments such as underwater. The waterproof level of mica tape fireproof cable is IP54, and its protection ability is slightly inferior, which makes it difficult to meet the needs of high humidity and water immersion scenarios.

In terms of cable service life, the MI cable has a design life of up to 50 years, far exceeding the 20 years of mica tape fire-resistant cable. It does not require frequent replacement during long-term use, reducing maintenance costs and construction risks.

In terms of installation difficulty, MI cable requires professionals and equipment to install due to its special structure and performance requirements; mica tape fireproof cable adopts conventional installation method, which is easier to use and suitable for ordinary construction teams.

In summary, MI cable has superior performance in fire resistance, waterproofness and life, but has high installation requirements; although mica tape fireproof cable is slightly weaker in these aspects, it is easier to install. Both have their own characteristics, and in practical applications, they need to be reasonably selected according to project requirements.

Service Support

Design support:

Free fire resistance calculations

Installation training:

On-site guidance of terminal production

Testing services:

Provide third-party fire resistance test report

Note: BTTZ cables need to be stored in a dry environment (humidity ≤ 60%). It is recommended to perform a 1000V megohmmeter test after installation. Titanium alloy sheath models can be customized for special environments (such as the seabed and space).

Mineral insulated fire resistant cable

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After-sales Service

After signing the contract, our company will conduct on-site inspections of the product’s usage environment, provide product technical data sheets, installation manuals, and answer any customer inquiries. We offer high-quality configuration plans based on product characteristics and the environment.

We guarantee timely supply upon receiving the delivery notice, ensuring the product quality meets customer requirements. Our professional after-sales team will transport the products to the specified location and assist with acceptance and storage instructions.

Before installation, we provide technical training and installation guidance to ensure the product meets customer environment and technical performance requirements.

Our after-sales service department offers 24/7 support. We will respond to customer issues promptly and provide solutions. For on-site service, within the city, technicians will arrive within 3 hours, and for out-of-city locations, within 6 hours, to provide excellent technical support.

Our products come with a 5-year warranty, with a lifespan of no less than 40 years under normal use. During the warranty period, we will provide free repair or replacement for any product-related issues and assume all associated responsibilities.

Technical Service

001

Material Supply and Transportation Service

002

Installation Guidance

003

Issue Resolution and On-site Service Response Time

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Warranty Period and Quality Assurance Commitment

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Product