RW11-12 Outdoor High Voltage Drop-Out Fuse for 12kV Lines

Rugged Protection for Overhead Distribution Systems in Harsh Environments

The RW11-12 drop-out fuse is a 12kV outdoor high-voltage protection device engineered for medium-voltage distribution networks. Designed with a polymer (silicone rubber) insulator and a heavy-duty copper fuse link, it ensures reliable fault isolation under lightning surges and short circuits. This fuse is ideal for substations, pole-mounted transformers, and recloser bypass setups where visibility, safety, and mechanical durability are essential.

Why Choose the RW11-12 Fuse for Your Network

Rated Voltage: 12kV
Breaking Capacity: Up to 12.5kA
Insulation Type: Polymer-housed, UV and pollution resistant
Fuse Link: Pure copper or silver-plated, time-delay type
Installation: Crossarm-mounted, 40mm mounting spacing
Arcing Chamber: Designed to quench arcs and improve self-cleaning
Operation: Drop-down visible break ensures safe manual operation

Application Scenarios

Distribution Pole Transformers: Installed as HV fuse protection for 100–315kVA transformers
Recloser Bypass Circuits: Used in tandem with automatic reclosers for manual backup protection
Remote Mountain Grids: Proven performance in dusty, humid, or salt-fog environments
Off-Grid Solar Farms: Reliable in low-maintenance energy storage systems

📌 Real-world example: In 2022, Energrid Systems (Mexico) deployed over 2,000 RW11-12 units across their mountain substations. Their engineers reported a 67% decrease in manual maintenance, and zero fuse link failures due to UV cracking over 18 months (Energrid Annual Maintenance Review, 2023).

Technical Specifications

Parameter	RW11-12 Value
Rated Voltage	12kV
Rated Current	100A / 200A (custom)
Breaking Capacity	12.5kA
Power Frequency Withstand	42kV (1min)
Lightning Impulse Voltage	75kV
Creepage Distance	≥ 300mm
Fuse Link Type	T-type / S-type copper
Installation	Pole-mounted, standard

Customer Feedback from Global Users

★★★★★ “We switched to RW11-12 fuses for all our 12kV rural lines. They’ve held up in storms without tripping unnecessarily.”
— George F., Line Supervisor, Yukon Grid (Canada)

★★★★☆ “Good drop-out visibility and the polymer insulator hasn’t degraded after two rainy seasons.”
— Daniel O., Field Engineer, GridSolutions Kenya

★★★★★ “Replaced porcelain fuses with RW11-12 in all our switchpoints. Lower weight and no cleaning required.”
— Michelle H., Procurement Manager, Eletra Utilities (UK)

★★★★☆ “Installed over 500 RW11s on our 12kV feeders. Very few burnouts, and resetting is quick.”
— Luis P., Operations Lead, CENER Colombia

★★★★★ “Highly recommend for 12kV overhead installations, especially in remote areas where maintenance is tough.”
— Brian T., Engineer, Apex Energy (South Africa)

Certifications & Standards

IEC 60282-2: High-voltage fuses for outdoor use
GB 15166.3: Drop-out fuse cutouts
ISO9001, ISO45001 certified manufacturing process
Routine factory dielectric and mechanical strength testing

Why Engineers Trust Wei Shoe Elec

At Wei Shoe Elec, we combine polymer science with proven fuse protection engineering to deliver reliable outdoor MV components. The RW11-12 is the result of over a decade of R&D in harsh climate performance and is trusted by utilities across five continents.

📞 For detailed drawings, replacement parts, or bulk procurement, contact:

Thor
Electrical Engineer, Wei Shoe Elec