Fuse Tubes and Electrical Insulation Tubes, Manufactured Since 1983
Tianze Electrical manufactures fuse tubes and electrical insulation tubes for cutout fuses, fuse links, current-limiting fuses and switchgear. Our product lines cover vulcanized fiber, filament wound epoxy glass, G5/G9 glass melamine, ceramic wound and composite constructions, in inside diameters from 5 mm to 800 mm. The factory was founded in 1983, holds ISO 9001 certification, and its fuse tubes passed KEMA testing in the Netherlands in 1990.
Fuse Tube Manufacturing Since 1983
Tianze Electrical Co., Ltd. (formerly Tongxiang Shimen Electrical Factory) has manufactured fuse tubes, insulating tubes and composite tubes for power protection since 1983. The plant is at 78 Xingyuan Road in the Shimen Township Industrial Park, Tongxiang, Jiaxing, Zhejiang, about 120 km from Shanghai and 70 km from Hangzhou, and covers about 50 mu (roughly 33,000 m²) with around 200 production staff.
We supply power protection fuse tubes, arc-extinguishing liners and bushings and fuse link tubes to fuse and switchgear manufacturers including ABB, Cooper, Hubbell, Eaton, SIBA and Littelfuse, as well as to defence-sector customers. Much of that work is co-development: the customer brings the electrical duty, we bring the material and process route.
Production covers seven product families and more than 500 part configurations, from polymer and electronic ceramic composites through to HV, MV and LV fuse tubes. Two national patents have come out of that work. Whether you need 200 prototype pieces or an annual contract volume, the same engineering review applies before anything goes into production.
Trusted by Global Fuse and Switchgear Manufacturers
Our fuse tubes and insulation components are used in production by fuse, cutout and switchgear manufacturers in Europe, North America and Asia. Several of these programmes started as a material or geometry problem the customer’s existing supplier could not solve.
Fuse Tube Product Lines
Each construction solves a different combination of arc behaviour, dielectric strength, mechanical load and operating temperature. Use the four product families below to narrow your selection, then send a drawing so our engineers can confirm material, wall build and machining before quoting.
Certifications and Industry Approvals
Our fuse tubes are produced under an ISO 9001 quality management system and are built to comply with IEC standards. In 1990 our fuse tubes passed testing at KEMA in the Netherlands. Products are also listed as qualified test articles by Xi’an High Voltage Apparatus Research Institute, Shenyang High Voltage Apparatus Research Institute and the China Electric Power Research Institute.
- ISO 9001 — quality management system, in force across all production lines
- KEMA tested — fuse tube testing passed in the Netherlands, 1990
- IEC compliant — products built to IEC standards; see IEC 60282-1 for high-voltage current-limiting fuse requirements
- Provincial High-Tech Enterprise — Zhejiang Province, plus municipal high-tech status
- 2 national patents in composite tube construction
- Exported to 13+ countries — United States, Brazil, Canada, Mexico, United Kingdom, Japan, South Korea, Iran, India, Pakistan, Colombia, Thailand and Egypt
Material certificates, dimensional inspection reports and dielectric test records are issued with each shipment on request. Tell us at RFQ stage which documents your incoming inspection requires, and we will confirm what we can supply before the order is placed.
How to Select the Right Fuse Tube
Choosing a fuse tube is mostly a materials decision, and it is easy to get wrong. The three questions that decide the construction are: what is the arc energy the tube has to handle, what is the continuous operating temperature, and what mechanical load does the assembly put on the tube. Get those three right and the rest is machining.
You do not have to be a materials specialist. Send us the application, the required voltage and temperature range, and a drawing or a sample — our engineering team will prepare a free sample for evaluation. You can reach us by email, phone, WhatsApp, WeChat or video call.
We also take on development work. Where an existing grade does not meet a new temperature or arc-voltage requirement, we develop the material with the customer’s design team. Our ceramic composite tube line was developed this way in collaboration with SIBA.
“Tianze high voltage fuse tube has excellent productivity. Their quality and stability is beyond my expectation.”
— Purchasing engineer, European fuse manufacturer
Read our fuse tube selection guides or send your drawing for a quotation.
Free Sample
Updates
Customer Reviews
Frequently Asked Questions
What materials are fuse tubes made from?
The main constructions are vulcanized fiber, filament wound epoxy glass fiber, G5/G9 glass melamine laminate, ceramic wound fiberglass, epoxy glass canvas, and composite tubes that combine a functional inner liner with a reinforced outer shell. Vulcanized fiber is chosen for arc-quenching and machinability; filament wound epoxy glass for mechanical strength and dimensional stability; glass melamine for high-temperature arc extinction in PV and EV fuses.
What size fuse tubes can you manufacture?
Vulcanized fiber tubes are produced with inside diameters from 5 mm to 65 mm and lengths from 8 mm to 1,000 mm. Filament wound tubes are produced with outside diameters from 8 mm to 800 mm, wall thicknesses from 0.5 mm to 10 mm, and lengths up to 12 m. Sizes outside these ranges are quoted case by case.
Do you supply fuse tubes for 100A and 200A cutout fuses?
Yes. Vulcanized fiber composite fiberglass tubes for 100A and 200A dropout fuse cutouts are a standard product line, supplied in cut lengths from 240 mm to 1,200 mm with machined ends, reamed holes or reduced diameters to the customer’s drawing.
Can you manufacture to our drawing?
Yes. Send the finished-part drawing or a sample together with the material grade, dimensions and tolerances, rated voltage, interrupting duty, operating temperature, quantity and inspection requirements. Our engineers review layer compatibility and machining feasibility, and identify any missing input before quoting.
What certifications does your fuse tube factory hold?
Tianze Electrical operates under ISO 9001 and builds to IEC standards. Our fuse tubes passed KEMA testing in the Netherlands in 1990, and are listed as qualified test articles by Xi’an High Voltage Apparatus Research Institute, Shenyang High Voltage Apparatus Research Institute and the China Electric Power Research Institute.
What is the lead time for a sample?
Free samples of standard sizes are normally prepared within a few working days of the technical review. Custom geometries requiring new tooling take longer; the tooling lead time is confirmed at quotation stage. Once a mould is made for your part, it stays available for repeat orders of that size.