● General
FN5-12R(L) Series indoor AC Medium voltage switch-fuse combination, after all - round type test and long-term trial operation, has met the performance requirement of IEC420 Alternating-current Medium Voltage Switch-fuse Combinations (ver.1990) and GB3804 3-63KV Alternating Current Medium Voltage Load Switches. Compared to the same product at broad, it has the same level of technology, and is compact and light. It’s mainly used for ring main unit and box substation and has widely applied for power distribution of 10KV lines. It realizes three positions for switching, isolating and earthing, ffectively avoiding phase-loss operation of equipment.
● Main Technical Parameters
Rated voltage (KV) | I min power frequency withstand voltage (KV) | Rated current (A) | 4s thermal stability current A | Dynamic current (Peak)(KA) | Rated breaking current (A) | Short circuit marking current (KA) |
12 | 42 | 400 | 12.5 | 31.5 | 400 | 31.5 |
48 | 630 | 20 | 50 | 630 | 50 |
● Rated Parameter of Fuse
Model | Rated voltage (KV) | Rated current (A) | Rated current of fuse-element A |
SDLA*J | 12 | 50 | 6,3,10,20,25,31,5,40 |
SFLA*J | 12 | 100 | 50,63,71,80,100 |
SKLA*J | 12 | 125 | 125 |
Outline and Installation Size
FN5-12RD(L) indoor AC high voltage load break switch
1. Chassis
2. Insulator
3. Fuse tube
4. Release
5. Moving contact
6. Arc-extinguishing chamber
7. Guide plate
8. Fixed contact
9. Opening and closing mechanism
10. Interlock device
11. Operating mechanism of LBS
Earth switch
2. Installation Diagram for Coupling of Load Break Switch and CS6-1
1. Load break switch
2. Flexible connection
3. 3/4 welded steel tube
4. Operating mechanism
