Place of Origin : Ningbo,China
Post Date : 12-04-2012
Expiry Date : 12-05-2012

24kv 50 ( 60 ) Hz Outdoor Vacuum Circuit Breakers For Power System 12kv Substation
1. Summary

ZW32-24 type outdoor high voltage vacuum circuit breaker is three-phase AC,

50(60)Hz outdoor power distribution equipment with the rated voltage of 24kv,

Used to open and close the load current, Over load current, And short circuit current in the electric power system. 

Also used to protect and control the circuit in substation, Mining and industrial enterprises,  

And frequently used in the operation places such as rural power network. 

2. Using environmental condition 
A. The altitude above sea level does not over 2, 000 meters; 
B. Surrounding air temperature: -40 ℃ ~+40 ℃ ; 
C. The wind speed is not bigger than 34m/s; 
D. The air filthy should be with in Ⅲ degree
E. Installing places: Not flammable,  the explosion hazard,  chemistry corrode place; 
F. Does not have the regular fierce vibration

 

3. Technical parameter

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Table 1  Circuit Breaker's Main Technical Data |
　 | 　 | 　 | Data |
NO | Item | Unit | 24kv |
1 | Rated voltage | KV | 24 |
2 | Rated frequency | Hz | 50 |
3 | Rated current | A | 630/1250 |
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 |
7 | Rated short circuit closing current(peak) | 　 | KA | 50/63 |
8 | Rated operating sequence | 　 | O-0.3s-CO-180s-CO |
9 | Mechanical life | Time | 10000 |
10 | Rated short circuit breaking current breaking times |   | 0 |
11 | 1min power frequency withstand current | (wet) | KV | 50/64 |
(dry) | KV | 65/79 |
12 | Lightning impulse withstand voltage(peak) | KV | 125/145 |
13 | Secondary circuit power frequency withstand voltage (1min) | V | 2000 |
　 |
 Table2 Circuit Breaker's Main Mechanical Data |
NO | Item | Unit | Data |
24kv |
1 | Clearance between contacts | Mm | 12±1 |
2 | Contact's overtravel | Mm | 3.5±1 |
3 | Open speed | M/s | 1.4±0.2 |
4 | Closing speed | M/s | 0.7±0.2 |
5 | Contact closing jumping time | 　 | Ms | ≤2 |
6 | Pole center distance | Mm | 380±1.5 |
7 |  Three pole open/close non-simultaneity | 　 | Ms | ≤2 |
8 | Each pole conducting circuit resistance | 　 | μΩ | ≤70 |
9 | Closing time | Ms | 25-60 |
10 | Open time | Ms | 20-60 |
11 | Motor's rated power | 　 | W | 40 |
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