Drop off fuses
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Economic and useful
1、 Purpose
HRW12 series drop fuses are widely used in the primary side of 15-36kV distribution line transformer as backup protection and for system and equipment switching operation. These series are installed on the 15-36kV distribution line branch line, which can reduce the power outage range, because it has an obvious disconnection point and has the function of isolation switch, which creates a safe working environment for the maintenance section of the line and equipment.
Shutdown and power transmission operations are allowed even in the case of load.
Our products are reasonable in design, safe and reliable, easy to use, and its performance conforms to the national standard IEC 60282-2.
2、 Use environment
a. The altitude shall not exceed 3000m;
b. There is no conductive dust and corrosive flammable and explosive gas in the surrounding air environment;
c. The height above the ground is 0-30m, and the maximum wind speed is 35m/s; The height above the ground is 30-50m, and the maximum wind speed is 45m/s.
d. The earthquake intensity shall not exceed magnitude 5;
e. The annual temperature difference ratio is within -5℃+ 45 ℃.
Product model | Rated voltage | Rated current | Lightning impulse withstand voltage | 1 min power frequency withstand voltage | Creepage distance |
HRW12-15/100 | 15kV | 100A | To ground 125 kV Fracture 130kV | To ground 50 kV Fracture 76 kV | ≥525mm |
HRW12-33/100 | 33kV | 100A | To ground 250 kV Fracture 260 kV | To ground 95 kV Fracture 105kV | ≥1080mm |
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