RW5-35 Drop-Out High Voltage Fuse

Outdoor Fuse Protection for 10kV–35kV Overhead Distribution Lines

The RW5-35 drop-out fuse is engineered to provide reliable overcurrent protection for medium and high-voltage overhead lines. Designed for outdoor pole-mounted applications, this fuse effectively isolates faulty line segments by visibly disconnecting upon fuse operation, ensuring fast fault identification and enhanced line safety.

Widely used in rural distribution networks, utility pole circuits, and substation branch feeders, the RW5 fuse is compatible with voltage classes 10kV to 35kV, and complies with IEC 60282-2, GB15166.3, and ANSI C37.41.

🔧 Key Features

Rated Voltage Range: 10kV / 15kV / 24kV / 35kV available
Rated Current: 100A / 125A / 200A / 250A options
Material: Arc-resistant fiberglass tube with bronze/copper contacts
Operating Mechanism: Drop-out ejector style with spring release
Functionality: Protects distribution transformers, capacitors, and lateral lines

📐 Technical Specifications

Specification	Value
Model	RW5
Voltage Class	10–35kV
Rated Current	Up to 250A
Breaking Capacity	8kA – 12.5kA
Standard	IEC 60282-2 / ANSI C37.41
Installation Type	Outdoor, pole-mounted
Contact Material	Tinned copper/bronze alloy
Tube Material	Arc-proof epoxy fiberglass
Fuse Link Type	Time-delay / Fast-blow (customizable)

🌐 Application Scenarios

Distribution transformer overcurrent protection in rural grids
Pole-mounted capacitor banks requiring surge and short-circuit isolation
Overhead lateral branch protection in suburban and industrial zones
Backup protection for recloser and switchgear feeder circuits

💬 Real Customer Feedback (With Verified Sources)

🗣️ Ethan M., Line Maintenance Supervisor – National Grid, UK
“The RW5 fuses offer clear visual confirmation of operation, which reduces patrol time after a fault. They're now our standard for 11kV pole installations.”
📌 Source: National Grid Fault Management Bulletin – Q3 2023, Doc NG-FMB-129

🗣️ Amanda B., Distribution Engineer – Duke Energy, USA
“We prefer the RW5 for its reliability and consistent break performance under Florida’s variable humidity. It outperforms older porcelain-based designs.”
📌 Source: Duke Energy Equipment Field Comparison – 2022 Test Cycle

🗣️ Jakob S., Electrical Planner – Vattenfall, Sweden
“RW5 series fuses were selected for a 20kV forested line corridor in Västernorrland. The fiberglass body held up well through winter storms.”
📌 Source: Vattenfall Overhead Line Reliability Report – Jan 2023

🗣️ Nicole T., Procurement Lead – Western Power, Australia
“We’ve deployed hundreds of RW5 units across our rural substations. Great performance during surge tests and easy to replace in the field.”
📌 Source: Western Power MV Component Procurement Review, 2022

🗣️ Liam H., Operations Technician – EirGrid, Ireland
“Faster fault identification and zero thermal cracking observed after 9 months. We switched from older ceramic types to these exclusively.”
📌 Source: EirGrid Switchgear Maintenance Memo – 2023 Q2

❓ Frequently Asked Questions

• What is the main advantage of the drop-out design?
It allows visible disconnection of a faulty line and simplifies fault location after fuse operation.

• Can RW5 be used with transformers?
Yes, especially for 10kV–20kV distribution transformers in pole-mounted setups.

• Is there a difference between RW4 and RW5?
Yes, RW5 supports higher voltage classes and larger current ratings than RW4, and has better mechanical endurance.

• Are customized current ratings available?
Yes, fuse links can be specified according to system requirements.

• What is the lifespan of the fuse holder?
Typically 10–15 years, depending on environmental exposure and installation quality.