24kv ZW32 Outdoor Air Circuit Breakers for mining, industrial enterprises, substation
Air Circuit Breakers Technical parameter
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Table 1 Circuit Breaker's Main Technical Data |
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Data |
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NO |
Item |
Unit |
24kv |
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|
1 |
Rated voltage |
kV |
24 |
|
|
2 |
Rated frequency |
Hz |
50 |
|
|
3 |
Rated current |
A |
630/1250 |
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|
4 |
Rated short circuit breaking current |
|
kA |
20/25 |
|
5 |
Rated peak withstand current |
|
kA |
50/63 |
|
6 |
Rated short time withstand current/ lasting time |
kA/s |
20/4 , 25/4 |
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|
7 |
Rated short circuit closing current(peak) |
|
kA |
50/63 |
|
8 |
Rated operating sequence |
|
O-0.3s-CO-180s-CO |
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|
9 |
Mechanical life |
time |
10000 |
|
|
10 |
Rated short circuit breaking current breaking times |
|
20 |
|
|
11 |
1min power frequency withstand current |
(wet) |
kV |
50/64 |
|
(dry) |
kV |
65/79 |
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12 |
Lightning impulse withstand voltage(peak) |
kV |
125/145 |
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|
13 |
Secondary circuit power frequency withstand voltage (1min) |
V |
2000 |
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Table2 Circuit Breaker's Main Mechanical Data |
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NO |
Item |
Unit |
Data |
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|
24kv |
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1 |
Clearance between contacts |
mm |
12±1 |
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|
2 |
Contact's overtravel |
mm |
3.5±1 |
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3 |
Open speed |
m/s |
1.4±0.2 |
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|
4 |
Closing speed |
m/s | ||
