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24KV Ceramic Drop Out Fuse Cutout With Arc Extingquishing Chamber

Name: 100 Amp Cut Out
Rated Voltage (kV): 24-27
Impulse Voltage (kV): 150
Power-frequency Withstand Voltage(kV): 65
Creepage Distance (mm): 540
Rated Current (A): 100,200
High Light: Ceramic Drop Out Fuse Cutout
24KV Drop Out Fuse Cutout
Porcelain Expulsion Drop Out Fuse
   
     
Availability:
Quantity:
  • RW12-24/100

  • SASUN

  • 8535100000-2


The 24kV porcelain cut-out fuse (with interrupter) is specially designed for short-circuit protection in medium-voltage distribution systems, integrating ceramic insulator and high-efficiency interrupter to achieve fast breaking (≤10ms) and visible breakpoint isolation. Suitable for:

Harsh Environment: High Pollution (Class IV), Coastal Salt Spray, Industrial Pollution Areas
High short-circuit current scenario: transformer secondary side protection, cable branch box inlet protection
Frequent operation requirements: photovoltaic/wind power collector lines, industrial park ring network system


According to IEC 60282-1, GB/T 15166.2)


Parameters Technical indicators
Rated voltage: 24kV (up to 27.6kV)
Rated current 100A (continuous current-carrying, temperature rise≤65K)
Breaking capacity 12.5kA (symmetrical RMS)16kA (symmetrical RMS with interrupter design)
Arc extinguishing performanceArc extinguishing time≤ 15ms (at 12kA fault current)
Creepage distance: ≥750mm (ceramic umbrella skirt anti-fouling flash design)
Power Frequency Withstand Voltage 65kV/1min (dry), 50kV/1min (wet)
Lightning impulse withstand voltage 150kV (peak, 10 times each of positive and negative polarity)
Mechanical Strength The flexural strength of the porcelain body ≥ 12kN, and the contact pressure ≥ 300N
Application scenarios
New energy stations: photovoltaic inverters, box transformers high-voltage side protection
Industrial power distribution: electric arc furnace transformer inlet protection in steel plants
Urban power grid: overcurrent protection of underground cable ring main unit
Mine power supply: mobile substation protection in high-vibration environmentsInterrupter material
High temperature resistant ceramic + metal arc extinguishing grid (arc ablation resistant)
Operating life2000 times of mechanical ≥ and 50 times of electrical ≥
Degree of protection IP66 (dust and water resistant)


Key technology of arc extinguisher
Arc extinguishing grid design:

Multi-layer V-shaped metal grids (copper-tungsten alloy) split the arc and force cooling to reduce the free gas pressure.
The grid spacing is ≤ 2mm, and the arc voltage gradient ≥ 200V/mm.
Air blowing arc extinguishing:

Arc energy is used to decompose gas-producing materials (e.g., polyamide) to produce longitudinal arc blowing of high-pressure gases.
Gas production ≥ 50 L/kA (when 12 kA is broken).
Sealing structure:

Silicone rubber sealing ring is used between the interrupter and the porcelain body, which can withstand high arc temperature (instantaneous ≥3000°C)


Precautions
⚠️ Safety Warning:

Insulated operating rods (length ≥ 2m) and full protective equipment must be worn for live operation;
After the breaking operation, it is necessary to wait for more than 5 minutes, and then reset after the arc extinguishing chamber is cooled;
The use of hyperparameters (e.g., replacing a 36kV system with a 24kV fuse) is prohibited.
If you need specific model parameters or customized solutions from suppliers, please provide:

System short-circuit current level (12kA/16kA/20kA)

Pollution Rating (Class III./Class IV)

Remote condition monitoring is required (integrated sensor optional)

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Sasun International Electric Co., Ltd, was established in 2001, As a professional manufacturer & exporter on high voltage overhead line product in China

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