The 33-36kV porcelain cut-out fuse is specially designed for high-voltage power distribution system, using high-strength porcelain insulator and double-fracture arc extinguishing structure, which is suitable for overload and short-circuit protection of substation outlet, high-voltage power distribution of industrial and mining enterprises and new energy stations (wind power/photovoltaic booster stations), the core features include:
High voltage adaptability: support 33kV/36kV system, power frequency withstand voltage ≥ 70kV, lightning impulse withstand voltage ≥ 170kV.
High-current breaking: 100A/200A rated current, breaking capacity up to 20kA (symmetrical RMS).
Anti-fouling flashover design: long creepage distance (≥1100mm) and anti-fouling umbrella skirt, suitable for Class IV heavy pollution environment.
| parameter | 100A | 200A |
| Rated voltage | 36kV (up to 40.5kV) | 36kV (up to 40.5kV) |
| Current rating | 100A | 200A |
| Breaking capacity | 20kA（0.3s） | 20kA（0.3s） |
| Power Frequency Withstand Voltage (Dry/Wet) | 70kV/1min, 50kV/1min | 70kV/1min, 50kV/1min |
| Withstand lightning impulse voltage | 170kV | 170kV |
| Creepage distance | ≥ 1100mm (number of umbrella skirts≥ 8 layers) | ≥ 1100mm (number of umbrella skirts≥ 8 layers) |
| Mechanical strength | The flexural strength of porcelain body ≥ 15kN | The flexural strength of porcelain body ≥ 15kN |
| Contact pressure | ≥400N(Copper silver-plated contacts) | ≥500N (Copper silver-plated contacts) |
| Operating life | ≥ 2000 splits and combinations | ≥ 2000 splits and combinations |
| weight | 6.5-7.2kg | 7.8-8.5kg |
Application scenarios
New energy booster station: wind power/photovoltaic 35kV collector line protection
Industrial high-voltage power distribution: protection of main transformer inlet line of chemical plants and steel plants
Urban power grid: overcurrent protection of underground cable ring main unit
Mine power supply: short circuit isolation of mobile high-voltage substation
