main features of the product:
1. the structure is a single-fracture interrupter in the form of variable opening range and double nozzles. the circuit breaker has the ability to break both short and long arcs. the nozzle under the best scheme strengthens the de-ionization effect of the arc gap after contact separation and improves the recovery strength of the insulating medium between contacts after short-circuit current crosses zero.
2. strong current capacity. the silver plating on the electrical contact surface has been conducted automatically with international leading technology, instead of manual silver plating, through the introduction of toshiba's automatic silver plating production line in japan. the plating has the uniform thickness, high hardness and strong adhesion, making the current capacity of the product stronger. the current capacity of the whole gis reaches 6300 a.
3. the product adopts an aluminum enclose, which has the advantages of light weight, low temperature rise and corrosion resistance. the shell opening adopts one-step stretch forming technology to avoid the irregularity of the shell interface. the outer surface of the aluminum shell is coated with thu iron red epoxy primer and b05 acrylic polyurethane enamel, which has excellent corrosion resistance.
4. excellent insulation performance. the production of basin insulators and post insulators adopts the automatic pouring in the production line of hubers company (germany), and the whole process from mixing and heating of resin and filler to pouring and forming is finished completely under sealed conditions. make sure the material is uniform and there are no bubbles inside the insulator.
5. excellent sealing performance. on the basis of finish machining, the shell flange and sealing surface have adopted advanced "rolling technology" to make the degree of sealing surface finish up to 0.8, thus ensuring the sealing performance of the sealing surface.
6. it meets the requirements of iec 62271-1, iec 62271-100, iec 62771-102, iec 62271-203 and other relevant standards;
main technical parameters:
|
no. |
item |
unit |
data | |
|
1 |
rated voltage |
kv |
550 | |
|
2 |
rated current |
a |
6300 | |
|
3 |
rated frequency |
hz |
50/60 | |
|
4 |
rated short-time withstand current /time |
ka/s |
63/3 | |
|
5 |
rated peak withstand current（peak） |
ka |
160 | |
|
6 |
rated power-frequency withstand voltage |
phase-to-earth |
kv |
740 |
|
across isolating distance |
kv |
740 318 | ||
|
7 |
rated switching impulse withstand voltage |
phase-to-earth |
kv |
1300 |
|
across isolating distance |
kv |
1175 450 | ||
|
8 |
rated lightning impulse withstand voltage |
phase-to-earth |
kv |
1675 |
|
across isolating distance |
kv |
1675 450 | ||
|
9 |
rated sf6 gas pressure (20℃) |
cb compartment |
mpa |
0.6 |
|
other compartments |
mpa |
0.4/0.5 | ||