Drop-out fuse

Product Description：

The Outdoor Cutout Fuse 300A Porcelain Type is designed for protecting overhead distribution networks and pole-mounted transformers. Made with high-strength porcelain insulation, the cutout provides stable dielectric performance, enhanced arc-extinguishing capability, and reliable overload and short-circuit protection. The drop-out mechanism ensures clear visual disconnection during faults, making it suitable for rural, urban, and industrial power distribution systems.

Product Advantages：

• Porcelain body provides strong insulation and weather resistance

• Drop-out design offers clear visual indication after fuse operation

• Suitable for 300A rated current and common distribution voltages

• Effective short-circuit and overload protection for transformers

• Corrosion-resistant hardware for long-term outdoor use

• Stable performance under rain, dust, UV exposure, and temperature changes

Application Scenarios：

1. Pole-Mounted Transformer Protection：Installed on the primary side of transformers; the fuse link melts under fault current, causing the fuse holder to drop and isolate the circuit.

2. Overhead Distribution Line Protection：Mounted on poles along distribution feeders to protect line segments against overloads or short circuits.

3. Branch Line or Tap Line Protection：Placed at tap points; if a downstream fault occurs, only the branch fuse operates, preventing feeder outages.

4. Industrial and Outdoor Utility Installations：Used to safeguard outdoor power equipment such as motors, pumps, and distribution switchgear from abnormal currents.

5. Rural Electrification and Long-Distance Feeders：Installed strategically along long feeders to isolate faults quickly and improve system reliability.
   

Quality Assurance：

Every fuse cutout is tested for power-frequency withstand voltage, mechanical strength, temperature cycling, contact resistance, and fuse-link compatibility following ANSI standards.

FAQ:

Q1: What fuse links are compatible?

A1: Standard 100A–300A fuse links for overhead distribution.

Q2: Does the porcelain body resist contamination?

A2: Yes, it performs well in dusty or humid outdoor environments.

Q3: Is visual inspection easy after operation?

A3: Yes, the drop-out mechanism provides a clear open gap.

Features:

1. Provide overload protection and short circuit protection

2. Compact in size

3. Cheap price

4. Easy to install

Our advantages：

1. Zhejiang Reacon Electric Co.Ltd., is a professional manufacturer and seller of fuses

2. The copper parts are hot-dip galvanized, which has strong corrosion resistance and is safer and more reliable

3. Using high-quality contacts: with a long creepage distance, good waterproof performance, and reduced maintenance in the later stage

4. Stainless steel cover: The steel parts are hot-dip galvanized

5. High strength insulators: Ceramic insulator brackets have advantages such as high temperature resistance, smooth color, and strong hardness

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