Application
AC high-voltage falling fuse (DRWU-12) is a protective device for outdoor high voltage overhead 12kV power distribution system which is the preferred equipment of a power supply station and industrial user. It provides entire range protection for transformer, capacitor and cable of the distribution system. It also provides thorough range protection for segment points and branch lines of overhead line. It can provide reliable protection according to the accurate time current characteristic to prevent overload and short circuit within a contemporary range which is from the minimum breaking current to the maximum breaking current.
Product meets following standards
GB/T15166.3 AC high-voltage fuse and expulsion fuse
DL/T640 ordering technical conditions for outdoor AC high-voltage falling fuse and fuse-link
Characters
The conductive part of this product is plated with outdoor silver. Insulating material use resin and fibrous material which have excellent mechanical properties, electrical properties and chemical corrosion resistance. Our company’s insulator instead of porcelain insulator. It has strong resistance to electricity. It can enhance reliability of contact conduction and extend service life.The insulator adopts the unique design of a long strip U-shaped groove. It has an insulator cover on the top. Its whole structure forms a watch box for the contact head which prevents rain, snow, freezing rain and dew from dripping on the contact head. The two sides umbrella skirt of insulator with U-shaped groove act as a slope guide, which prevents dew, rain and snow from dripping on the contact head, therefore, the effect of integral insulation is achieved. It ensures good switching performance and reliable mechanical performance of the product on the matter in any harsh environment. It has a high level of anti-pollution.
1 The product has good breaking performance.It can break various overload current of the rated breaking current or below.The minimum breaking current is 5A.Its performance meets the requirements of international IEC standards.
2 Due to the use of stepwise exhaust and the covered inner arc suppression tube on the melt,this reasonably solves the contradiction of breaking current and extends the lower limit range of the breaking current.
3 The insulator and upper and lower contacts are mechanically clamped,has high mechanical strength.The parts adopt stamping parts which have strong interchangeability and are easy to maintain.The upper contact adopts cylindrical surface contact which is easy to operate.
Main technical parameter
AC high-voltage falling fuse (DRWU-12) is a protective device for outdoor high voltage overhead 12kV power distribution system which is the preferred equipment of a power supply station and industrial user. It provides entire range protection for transformer, capacitor and cable of the distribution system. It also provides thorough range protection for segment points and branch lines of overhead line. It can provide reliable protection according to the accurate time current characteristic to prevent overload and short circuit within a contemporary range which is from the minimum breaking current to the maximum breaking current.
Product meets following standards
GB/T15166.3 AC high-voltage fuse and expulsion fuse
DL/T640 ordering technical conditions for outdoor AC high-voltage falling fuse and fuse-link
Characters
The conductive part of this product is plated with outdoor silver. Insulating material use resin and fibrous material which have excellent mechanical properties, electrical properties and chemical corrosion resistance. Our company’s insulator instead of porcelain insulator. It has strong resistance to electricity. It can enhance reliability of contact conduction and extend service life.The insulator adopts the unique design of a long strip U-shaped groove. It has an insulator cover on the top. Its whole structure forms a watch box for the contact head which prevents rain, snow, freezing rain and dew from dripping on the contact head. The two sides umbrella skirt of insulator with U-shaped groove act as a slope guide, which prevents dew, rain and snow from dripping on the contact head, therefore, the effect of integral insulation is achieved. It ensures good switching performance and reliable mechanical performance of the product on the matter in any harsh environment. It has a high level of anti-pollution.
1 The product has good breaking performance.It can break various overload current of the rated breaking current or below.The minimum breaking current is 5A.Its performance meets the requirements of international IEC standards.
2 Due to the use of stepwise exhaust and the covered inner arc suppression tube on the melt,this reasonably solves the contradiction of breaking current and extends the lower limit range of the breaking current.
3 The insulator and upper and lower contacts are mechanically clamped,has high mechanical strength.The parts adopt stamping parts which have strong interchangeability and are easy to maintain.The upper contact adopts cylindrical surface contact which is easy to operate.
Main technical parameter
| Model | DRWU-12/100-6.3 | DRWU-12/200-12.5 |
| Rated voltage (kV) | 12 | 12 |
| Rated current (A) | 100 | 200 |
| Rated breaking current (kA) | 6.3 | 12.5 |
| Interrupting characteristics | It can break any short circuit and overload current up to 6.3kA,minimum breaking current is 5A | It can break any short circuit and overload current up to 12.5kA,minimum breaking current is 15A |
| Effective value of 1 min power-frequency dry withstand voltage | 42 | 42 |
| Effective value of 1 min power-frequency wet withstand voltage | 30 | 30 |
| Peak value of lightning impulse withstand voltage (kV) | 75 | 75 |
| Temperature rise at all conductive areas and contact points | 35 | 35 |
