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For integrated box transformer (ZGS type), transformer body, HV load switch and fuse protector are immersed in the same oil tank, which substantially reduces the volume of equipment; box cover is sealed with concealed high-strength bolts and oil-resistant NBR gaskets; full consideration is given to water-proof and condensation-proof requirements in the box design; 5% gradient is designed for head cover to prevent standing water; the box door is interlocked at three points, HV compartment may only be opened after opening of LV compartment.
|
Item |
Unit |
Technical parameter |
|
Rated voltage |
kV |
10/0.4 (HV/LV) |
|
Max. working voltage |
kV |
12 (HV side) |
|
Rated frequency |
Hz |
50 |
|
Rated capacity |
kVA |
30-1600 |
|
1min power frequency withstand voltage |
kV |
35 |
|
Lightning surge voltage |
kV |
75 |
|
Cooling method |
|
Oil-impregnated &self-cooling |
|
Breaking current of HV backup fuse protector |
kA |
50 |
|
Breaking current of plug-in fuse protector |
kA |
2.5 |
|
Ambient humidity |
℃ |
-35-+40 |
|
Permissible temperature rise in winding |
K |
65 |
|
No-load voltage regulation |
|
+ 5% or 2*2.5% |
|
Noise level (acoustic power level) |
db |
<55 |
|
IP grade |
|
IP33 |
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