In today’s rapidly developing power infrastructure, gas-insulated substations, due to their compact structure and efficient transmission and distribution capabilities, have become the preferred solution for densely populated urban areas. However, their safety protection faces multiple challenges: moisture infiltration can lead to equipment short circuits, rodent damage can cause cable faults, partial discharge activity threatens stable operation, and there is also the need to guard against combined risks such as fire and electromagnetic interference.

TST SEAL Technology’s independently developed modular through-gap sealing system, with its innovative design, builds a solid sealing barrier for substations. It is widely used in underground cable trenches, foundations, walls, floors, high-voltage switchgear, GIS systems, and equipment rooms, providing IP68 waterproof, fireproof, airtight, rodent-proof, electromagnetic shielding, and explosion-proof functions. Through variable diameter adaptation, spare capacity, and modular design, it replaces traditional sealing methods, saving 70% of space, reducing operation and maintenance costs, and ensuring safe and efficient operation.

Underground Engineering: Blocking Risks at the Source

Underground cable trenches, foundations, and wall penetration points are the first line of defense for safety protection. Traditional sealing methods struggle to cope with partial discharge caused by high humidity environments or physical damage from rodent intrusion.

The TST SEAL modular perforation sealing system completely eliminates these risks through the following design features:

Multiple Protection Certifications: The TST SEALMCT system is certified by authoritative testing institutions (such as the National Fireproof Building Materials Quality Supervision and Inspection Center), achieving the highest IP68 protection rating. It can withstand high-pressure environments from 0.3MPa to 0.5MPa, effectively blocking groundwater vapor infiltration and ensuring long-term dryness in underground areas.

Biological Protection: Special sealing modules effectively block rodent intrusion paths, preventing the risk of cable damage.

Flexible Adaptability: The variable diameter function is compatible with single to multiple cables and pipes of different specifications. Built-in spare capacity supports future expansion, significantly reducing maintenance costs.

Ground Facilities: Comprehensive Protection for Critical Equipment

Perforation sealing of walls, floors, and cabinets above ground is equally crucial. The TST SEAL system, through diverse installation methods such as bolting and welding, is compatible with various building substrates including concrete, steel structures, and sandwich panels, achieving triple protection upgrades:

 Fire Integrity: Restores fire barriers through perforated openings, with a fire resistance rating of up to 3 hours (GB23864 standard), and flame retardant performance meets EN13501-2 E150 certification.

 Electromagnetic Compatibility (EMC): Dedicated electromagnetic shielding modules pass 18GHz high-frequency shielding effectiveness testing, effectively isolating external interference and ensuring stable operation of precision equipment.

 Airtightness and Explosion-Proof: The sealing system prevents the diffusion of harmful gases, and the explosion-proof module meets the application requirements of hazardous areas, eliminating the risk of explosion.

TST SEAL’s Core Advantages: Integrated Solution to Industry Pain Points

Why do the world’s five major classification societies (CCS, ABS, RS, BV, RINA) and the EU Marine Equipment Directive (MED) jointly certify the TST SEAL system? Its differentiated value lies in:

 Full-Scene Protection: A single system integrates fireproofing, waterproofing, airtightness, explosion-proofing, EMC protection, and bio-intrusion resistance, replacing traditional multi-product solutions and mitigating compatibility risks.

 Full Lifecycle Service: Modular design supports non-destructive disassembly and reuse, with a 30-year lifespan significantly reducing long-term costs.

 Efficient Construction: Pre-assembled frames and peelable sealing modules simplify on-site installation, shortening the construction period by more than 50%, making it particularly suitable for renovation projects.

The TST SEAL modular through-hole sealing system covers the entire sealing chain from underground cable trenches to surface high-voltage switchgear, combining fireproofing, explosion-proofing, and electromagnetic shielding performance. It has served major projects such as the State Grid and the Three Gorges Group, becoming an “invisible guardian” of power safety construction.