1. ZN63 VS1 series 3 phase indoor 24kv 630A 1250a vcb vacuum circuit breaker
ZN63-24 indoor H.V. vacuum circuit breaker is an indoor switchgear with three-phase, rated voltage of 24kV, control and protection for industrial and mining enterprises, power plants and substations, electrical facilities, and for frequent operation place adopting VET operating mechanism and circuit breaker integrated design can be used as a fixed installation unit can also be equipped with special advance mechanism, the composition of handcart unit used some of the main circuit can use the whole solid seal post with high reliability, maintenance-free, in order to achieve smaller circuit breakers, can be equipped with KYN28A 24 and other handcart switch cabinet. In the home it can also be used with fixed switchgear.
2. Main features:
⚫Mechanical and electrical durability During rated current, breaking times can reach to 10000, 20000 During rated
short-circuit current, breaking times can reach to 20, 30 and 50 times.
⚫ The circuit breaker has complete functions. It is used to switch on/off various loads as specified by DL standards, such as method 1-5, capacitor, out-of-phase conditions.
⚫ Easy maintenance Normally, it just needs to clean the operating mechanism and add lubricants.
⚫Vertical insulating tube Protect it from various environmental impacts.
⚫With complete product portfolio Rated current from 630A to 4000A Rated short-circuit current form 20kA to 50kA
⚫ It has the features of series, strong versatility, convenient use and easy maintenance. All products have passed
500 running-in tests according to reliability principle in the factory before delivery, so as to ensure the reliability.
⚫ We will provide you with qualified and high-efficient after-sales service.
3. Model
4. Main Technical Parameters
Main technical parameters for ZN63 Indoor Vacuum Circuit Breaker
| Item |
Unit |
20kva |
25kA |
31.5kA |
40kA |
50kA |
| Rated Voltage |
kV |
24 |
| Max working voltage |
kV |
24 |
| Rated Current |
A |
630 |
1250 |
1250
1600
2500
3150 |
1250
1600
2500
3150 |
1250
2500
3150 |
| Rated short circuit breaking current |
kA |
20 |
25 |
31.5 |
40 |
50 |
| Rated short circuit making current (peak) |
kA |
50 |
63 |
80 |
100 |
125 |
| Rated peak withstand current |
kA |
50 |
63 |
80 |
100 |
125 |
4s rated short time
withstand current |
kA |
20 |
25 |
31.5 |
40 |
50 |
Rated
insulation
level |
Power frequency withstand voltage |
kV |
42(fracture48) |
| Impulse withstand voltage |
75(fracture85) |
| Rated sequence of operation |
|
0-0.3s-CO-180s-CO |
| Mechanical life |
time |
10000 |
| Breaking times of rated short circuit breaking current |
time |
50 |
| Operating voltage |
V |
AC/DC110, 220 |
| Clearance between open contacts |
mm |
11±1 |
| Over travel (contact spring reduction length) |
mm |
4±0.5 |
| Three-phase opening/closing asynchrunous |
ms |
≤2 |
| Contact closing bounce time |
ms |
≤2 |
| Avarage opening speed |
m/s |
0.9~1.2 |
| Avarage closing speed |
m/s |
0.4~0.8 |
Opening
time |
Under max operation voltage |
s |
≤0.05 |
| Under min operation voltage |
≤0.08 |
| Closing time |
s |
≤0.1 |
| Each phase main loop resistance |
µΩ |
≤40 |
| Allowable attrition thickness of moving and fixed contact |
mm |
3 |
5. Application
Maximum temperature: +40℃; Minimum temperature:-25℃.
Altitude above sea level: Maximum installation altitude: 2500m.
Humidity: Monthly average humidity 95%; Daily average humidity 90% .
Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
No frequent violent shake.
6. Factory
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