Dependable China SEP Series Insulators from Leading Suppliers | High-Quality Factory Manufacturing for Power Networks
SEP Series Insulators introduction
The SEP series electrical insulators fall into the category of medium - and low - voltage insulators. The upper and lower ends are designed as cylinders, while the middle part features a hexagonal prism. The hexagonal prism has six flat and corresponding planes, which provide excellent support for using a clamping wrench during the assembly process. When operators use a clamping wrench to install or remove the busbar insulators, the wrench can precisely fit onto the planes of the hexagonal prism, creating a stable and strong point of force. This design not only significantly improves the assembly efficiency and reduces the workload of operators but also ensures the accuracy and reliability of the installation process. Operators can easily control the installation force and angle, enabling the insulators to be installed accurately in the designated positions, laying a solid foundation for the stable operation of the subsequent electrical systems.
In terms of size specifications, the SEP series low-medium voltage insulators cover a relatively wide range. Their height generally ranges from 16 to 80 mm, and the diameter ranges from 15 to 65 mm. This diverse size design is intended to meet the needs of different customers and various application scenarios. For some electrical equipment with limited space, smaller - sized insulators can perform their insulating function within the confined space. In contrast, for some large - scale electrical systems, larger - sized insulators can provide stronger support and better insulation performance. The different combinations of height and diameter allow the SEP series insulators to flexibly adapt to various complex electrical environments, demonstrating their strong versatility and adaptability.
Low-medium voltage electrical insulators specification
| Product features(Technical Data) | Meet ROHS 2.0 environmental requirements Colors, inserts, materials can be customized according to customer requirements |
| Type | SEP series(SEP-type hexagonal support insulators) |
| Product height | 16-80mm |
| Product diameter | 15-65mm |
| Thread | M4-M12 |
| Insert material | brass, steel |
| Raw material | unsaturated resin (BMC/DMC) |
| MOQ | 100 pcs |
| Working temperature | -40-140℃ |
| Flame retardant grade | UL94 V0 (3mm) |
| Hot wire temperature | 960℃ |
| Operating voltage (AC) | 600-3200V |
| Working voltage (DC) | 800-4500V |
| Test items | low and high temperature test, pressure resistance, torque strength, tension, bending force, pressure, insulation resistance, ROHS, flame retardant |
| Certificates | CE, REACH, ELV, SGS |
| Quality System | ISO9001, ISO14001, IATF16949 |
production workshop
Product certification
UL, CE, ROHS, REACH, IATF16949, ISO9001, ISO14001, PSCR

UL

CE

IATF16949

ISO9001

ISO14001

PSCR

ROHS

REACH
Product packaging
Product application case
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Frequently Asked Questions (FAQ)
What are the main applications of SEP series insulators?
SEP series electrical insulators are low-medium voltage support components widely used in electrical cabinets, distribution boards, and busbar systems to secure and insulate electrical conductors.
What is the advantage of the hexagonal prism design in SEP insulators?
The hexagonal prism design features six flat surfaces that provide a stable grip for clamping wrenches. This enables operators to apply force accurately and securely during assembly and disassembly, improving installation efficiency and reliability.
What are the dimensions and custom options available?
The height ranges from 16 to 80 mm and the diameter ranges from 15 to 65 mm. Thread sizes range from M4 to M12. Colors, insert options (brass or steel), and custom raw materials can be adjusted to meet specific requirements.
What is the operating temperature range and flame retardancy?
SEP series insulators can withstand temperatures from -40°C to 140°C. They feature a flame retardant grade of UL94 V0 (3mm thickness) and a hot wire temperature limit of 960°C.
What certifications do these electrical insulators possess?
Our products are fully compliant with RoHS 2.0 requirements and hold certificates including CE, REACH, ELV, SGS, UL, IATF16949, ISO9001, and ISO14001.





