RW11-10 — 12 kV Porcelain Drop-Out Fuse Cutout
The most widely deployed cutout on Chinese 10kV distribution networks — glazed porcelain body, silver-plated copper contacts, fiberglass arc-extinguishing tube. Proven for transformer and line-branch protection.
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Overview
The RW11-10 is a 12 kV porcelain drop-out (expulsion) fuse cutout for overhead distribution networks. On fault, the fuse link melts, the arc is quenched inside the tube, and the tube drops by gravity to form a visible isolation gap — combining overcurrent protection and visible disconnection in one passive, hot-stick-operable device.
Available in 100 A and 200 A, common (drop-out) and load-break versions. Built and type-tested to IEC 60282-2 / GB 15166.3.
Technical Specifications — RW11-10
| Model | RW11-10 (porcelain) |
|---|---|
| Rated Voltage | 12 kV |
| Rated Current | 100 A / 200 A |
| Rated Breaking Current (sym.) | 12 kA |
| Lightning Impulse (BIL) | 85 kV |
| Power-Frequency Withstand (1 min) | 42 kV |
| Creepage Distance | 240 mm (Grade III) — higher for Grade IV pollution |
| Weight (100A / 200A) | 5.2 / 5.5 kg |
| Insulator | Porcelain |
| Standards | IEC 60282-2 / GB/T 15166.3 |
Electrical ratings per IEC 60282-2 / GB 15166.3; values confirmed on type-test report.
Range
| Model | Voltage | Current | Breaking | Weight |
|---|---|---|---|---|
| RW11-10/100 (drop-out) | 12 kV | 100 A | 12 kA | 5.2 kg |
| RW11-10/200 (drop-out) | 12 kV | 200 A | 12 kA | 5.5 kg |
| RW11-10 load-break | 12 kV | 100/200 A | 12 kA | 7 / 7.5 kg |
Also available in other voltages (12 / 24 / 36 kV) and materials (porcelain & polymer) — see sidebar. 400 A and custom on request.
Key Features
Dual Function
Overcurrent protection + visible disconnection in one passive device.
Hot-Stick Operable
Open/close from the ground; ~25° downward tilt for positive drop-out.
Silver-Plated Contacts
Silver-plated copper contacts for low, stable contact resistance over decades of outdoor service.
IEC / GB Type-Tested
Breaking, impulse, dry/wet power-frequency and mechanical endurance per IEC 60282-2 / GB 15166.3.
Applications
Distribution Transformers
Primary-side protection for pole-mounted transformers.
Overhead Line Branches
Sectionalizing and overcurrent protection for laterals and taps.
Capacitor Banks
Overcurrent and switching-transient protection.
FAQ
Porcelain or polymer?
Common or load-break?
What breaking capacity do I need?
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