RW12-15
RW12-15 drop-out fuse cutout
Outdoor RW12-15 drop-out fuse cutout protecting distribution transformers and overhead line tee-offs at 12(15) kV against short circuits and overloads.
Key parameters
- Rated voltage
- 12(15) kV
- Rated current
- 100 / 200 A
- Rated short-circuit breaking current
- 8; 12.5; 16 kA (100 A); 12.5; 16 kA (200 A)
- Rated lightning impulse withstand voltage
- 125 kV
- Creepage distance
- 330 mm
Design
- Upper terminal clamp (cast copper, 3 µm hot tin plating).
- Top cover (high-quality 304 stainless steel, integral with the terminal clamp).
- Upper contact plate (one-piece, 2 mm thick) — improved conductivity.
- Upper moving contact (304 stainless steel spring withstands high pressure).
- Operating hook (the fork-shaped hook reliably guides the fuse tube into the "closed" position).
- Fuse tube (UV-resistant, non-hygroscopic, durable).
- Trunnion (3 µm silver plating) — the fuse tube does not sway sideways during closing, high precision.
- Lower fixed contact (not visible in the photo): the current path through the silver-plated shunt plate does not pass through the hinge axis.
- Drop-out mechanism (ensures rapid release of the fuse tube end; the flexible conductor is quickly thrown clear).
- High-strength insulator (self-cleaning surface, high strength, excellent workmanship).
Note: all iron parts are hot-dip galvanised (coating thickness over 80 µm), stainless steel — high-quality grade 304; cast parts — optionally precision-cast brass or aluminium bronze.
Main technical parameters
| Parameter | Unit | RW12 | RW12 |
|---|---|---|---|
| Rated voltage | kV | 12(15) | 12(15) |
| Rated current | A | 100 | 200 |
| Rated frequency | Hz | 50 | 50 |
| Rated current of the base | A | 100 | 200 |
| Rated short-circuit breaking current | kA/A | 8/100; 12.5/100; 16/100 | 12.5/200; 16/200 |
| Power-frequency withstand voltage, wet | kV | 45/55 | 45/55 |
| Power-frequency withstand voltage, dry | kV | 50/55 | 50/55 |
| Rated lightning impulse withstand voltage | kV | 125 | 125 |
| Creepage distance | mm | 330 | 330 |
| Mechanical endurance | operations | 500 | 500 |
| Altitude | m | 1000 | 1000 |
| Ambient temperature | °C | −40 … +70 | −40 … +70 |
| Overall dimensions | cm | 50×36×12.5 | 50×36×12.5 |