project name |
unit |
hvelectricalapparatus |
transformer |
imelertrical anpparatus |
rated voltage |
kv |
6;12 |
6/0.4;10/0.4 |
0.4 |
rated capacity |
kva |
|
1200~1250 |
|
ⅱ 50~400 |
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rated current |
a |
630,800,1250 |
|
200~2000 |
rated breaking current |
a |
load switch 630a |
|
15~63 |
ka |
the combination of electrical appliances depends on the fuse |
|||
rated short time withstand current |
ka |
20 ka |
200~400kva |
15×1 |
25 ka |
>400kva |
30×1 |
||
rated peak withstand current |
ka |
31.5;50 |
200~400kva >400kva |
30 |
rated making current |
ka |
31.5:50 |
|
|
power frequency withstand voltage |
kv |
phase to ground and phase to phase 42 |
oil immersed 35 |
≤300v;2 |
isolated south fracture 48 |
dry 35 |
>300v;2.5 |
||
lightning impulse withstand voltage (peak) |
kv |
phase to ground and phase to phase 75 |
75 |
|
isolation fracture 85 |
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cabinet protection level
|
|
ip3x |
ip2x |
ip30 |
level of noise |
db |
|
oil immersed<55 |
|
dry<65 |
|
notes: when transformer capacity is less than 200kva, items 5, 6 is not required.