High Voltage Stress Relief Mastic
- CCMT
- CHANGCHUN,CHINA
- Based on the order quantity
- 500,000 meters per month
1. The electric field at 11kV – 36kV cable joints and terminals is being uniformized by means of our electric wire adhesive tape, which effectively releases the stress concentration.
2. The gaps between different parts of the installation are sealed tight with our adhesive mastic tape, which also acts as a good conductor to avoid partial discharge.
3. Through our termination tapes, stress relaxation and insulation of cable accessories is obtained so that they work reliably and safely.
Cable joints and terminations in high-voltage cable systems are at risk of developing locally high-stress areas from reasons like shielding discontinuity, structural change, and non-uniform electric field distribution. Extended periods of service might result in partial discharge, insulation degradation, and finally insulation failure, which could negatively impact the safety and reliability of the power supply.
In order to resolve this problem, our stress control mastic is made of a composite of a conductive filler and a polymer elastomer. It helps to evenly distribute the electric field and decrease the gradient stress, thus, minimizing stress concentration in the parts of cable joints and terminations effectively. Beside that, the superb flexible filling feature allows the mastic adapts to various structural gaps, forming a sealing layer that also protects the cable. This stress control combined with insulation protection, moisture-proofing and resistance to the environment, assures long-term stable operation of 33kV, 36kV high-voltage cable terminal parts and other similar cable accessories.
Introduction to Mastic Tape for Cable.
Stress relief tape is a stress control material for the termination and intermediate joints of high-voltage cables. The electric field distribution gets balanced and the stress gradient gets smoothed out by this material, which is the main reason why it effectively reduces stress concentration that could lead to partial discharge and insulation failure. It is a composite product that comprises conductive filler and high-molecular elastomer giving it a combination of outstanding stress control, insulation sealing, moisture resistance as well as environmental resistance. The product satisfies the stress control operational requirement for 33kV and 36kV high-voltage cable accessories over a long period, and ensures cable connections get safe, reliable and lasting electrical protection.
Product Performance Specifications:
| Property | Testing Method | Typical Data |
| Densile | ASTM D 792 | 1.4g/cm³ |
| Tensile Strength | ASTM D 638 | 0.2MPa |
| Ultimate Elongation | ASTM D 638 | 1000% |
| Dielectreic Strength | IEC 243 | 15kV/mm |
| Dielectreic Constant | IEC 250 | 16 |
| Volume Resistance | ASTM D 257 | 1.0×10¹¹Ω·cm |
| Loss Factor(50Hz) | - | 0.03 |
| Heat Shock（105℃） | - | PASS |
Advantages of Stress Control Mastic:
1. Outstanding control of stress: Stress-relief tape evenly spreads out the electric field, getting rid of stress peaks at cable joints and stress cone termination zones. By doing those things, it minimizes the risks of partial discharge and insulation breaking down while enhancing the reliability of the whole operation of the cable accessories.
2. Outstanding ability to fill and seal: Stress control mastics boast high flexibility and plasticity so, it can closely cover installation gaps and irregular regions making a stable seal and, at the same, improves waterproofness, protection against moisture and resistance against environment.
3. Great material compatibility: Adhesive tapes for wires feature good compatibility as well as adhesion with copper, aluminum, lead sheaths, and a variety of polymer insulation materials and can serve as high-voltage cable accessories with different structures.
4. Stability and durability over time: The sealing tape of cable termination is very moisture-proof, anti-ageing, and environment-proof. The electrical performances of the tape are stable when working in environments from -20 degrees Celsius up to around 90 degrees Celsius, thus fitting long-life functioning requirements of both high-voltage cable terminations and joints.
Applications of Cable Termination Sealing Tape:
· Power transmission and distribution systems: Used in high-voltage cable accessories for transmission lines, distribution networks, and substation facilities, providing stable stress control and insulation protection for cable connections.
· Power infrastructure: Designed for constructing power grid, remodeling the power engineering, doing cable installation work. High-quality product that greatly improves the stability of high-voltage cable terminations and connectors at work.
· Industrial power systems: Suitable for high-voltage power supply and distribution systems at various facilities such industrial, petrochemical, metallurgical plants, and mines while satisfying the conditions regarding cable insulation and stress control even under complex operating scenarios.
· Suitable for high-voltage cable connections used in different applications such as wind power, photovoltaic, energy storage, electric transportation, and rail transportation, this insulation material is able to provide an insulated layer which will keep the most important electricity systems working safely for years.
CCMT – Your Top Choice for Waterproof Insulating Sealing Tape.
Since our establishment in 1986, we have always been a company specializing in cable accessories. Throughout all these years, we have constantly been learning from the industry by means of product development and material improvement as well as large-scale production.
By developing for more than forty years, now our company has a whole set of manufacturing system. We possess a production base covering 10,000㎡ with 200 plus professional workforce, 40 sets of high-tech production machines, so as to guarantee a reliable and time-saving cable accessories supply service to customers all over the world.
Throughout the process of manufacturing insulating sealing tape, we have a series of customized machines and equipment to carry out the job. Four large scale sealant extruders working continuously are among the specialized machines in our plant. Besides that, we have also matured in terms of continuous production capabilities of the tapes. Our waterproof insulating sealing tape can produce 500,000 meters per month, which is good enough for meeting the inventory requirements of distributors, large engineering works, and bulk buyers.
We manage production according to the ISO 9001:2015 quality management system (No. 00123Q36311R5M/2200). Our products meet international certification requirements such as CE, SGS, and IEC, and also comply with environmental regulations such as RoHS and REACH.
Serving the Global Market.
We have leveraged our ability to produce high quality products and delivering them consistently as a way of expanding into different international markets and serving both power, industrial and engineering sectors around the globe. Our exports of products are currently covering the Middle East, Asia, Europe and South America. We joined force with RAYCHEM by providing them an ultra thick three-layer co-extruded heat-shrinkable composite tubing for several tens of thousands meters; we have also offered custom-insulating tapes with thousands of rolls for 3M.
Actively Engaging in International Exchanges.
To learn more about market demands worldwide, we have always been joining industry overseas events through exchange activities between different countries.International exhibitions provide opportunities for us to talk with buyers, engineering companies, industry partners from various countries in depth regarding product testing, certifications, purchases in large quantities, etc., and thereby gradually improving our brand's competitiveness in the international cable accessories market.
FAQ:
1. Does stress relief tape have a sealing function?
Yes, the product has excellent flexible filling properties, capable of filling installation gaps and irregular areas, while providing waterproof and moisture-proof sealing protection.
2. What environmental adaptability does high-pressure stress relief sealant possess?
The product has excellent water resistance, moisture resistance and aging resistance, and can maintain stable performance in environments ranging from -20℃ to 90℃, making it suitable for long-term outdoor use and complex operating conditions.
