Rated Electric Fuse Cutout / Composite Fuse Cutout 10kv

Our 10kV Rated Electric Fuse Cutouts and Composite Fuse Cutouts provide essential overcurrent and short-circuit protection for power distribution systems. Designed for outdoor use, these devices are ideal for safeguarding transformers and main distribution lines in 50Hz AC networks with voltages up to 35kV.

Available in two variants:

• Standard Fuse Cutouts – For basic circuit protection

• Load-Break Fuse Cutouts – Enhanced models capable of interrupting load currents

Innovative Construction

Each Fuse cutout features:

• Durable insulating base with fixed contacts

• Fuse tube assembly combining:

  • Inner arc-quenching tube (gas-generating material)

  • Outer protective sleeve (bakelite or epoxy-glass composite)

• Spring-assisted mechanisms in load-break models

Advanced Protection Mechanism

1. Normal Operation:

   • Fuse tube remains closed via tension from the fuse link

   • Continuous current flows through fixed and moving contacts

2. Fault Conditions:

   • Overcurrent melts fuse link, initiating arc

   • Arc-quenching tube generates high-pressure gas to extinguish arc vertically

   • Mechanical release allows fuse tube to drop, creating visible isolation

3. Load-Break Functionality:

   • Insulating link manually operates contacts

   • Auxiliary switches create controlled arc in quenching chamber

   • Narrow gas channels ensure rapid arc extinction at current zero

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Technical Specifications

Parameter	Model HRW3-10/100	Model HRW3-10/200
Rated Voltage	10kV	10kV
Current Rating	100A	200A
Breaking Capacity Range	10-100MVA	20-200MVA
Dry Withstand Voltage	42kV	42kV
Wet Withstand Voltage	34kV	34kV

Industry Applications

• Transformer Protection: Installed on HV side of distribution transformers

• Line Protection: Critical for main distribution feeders

• Renewable Energy: Grid-tied solar/wind farm connections

Note: All models comply with international safety standards for outdoor high-voltage applications.