| Breaking Capacity: | High Voltage Circuit Breakers |
|---|---|
| Operation: | Energy-storage Type |
| Speed: | Normal Type Circuit Breaker |
| Arc-extinguishing Medium: | Vacuum |
| Installation: | Fixed |
| Structure: | Vcb |
| Customization: |
|---|
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Audited Supplier Railway Porcelain Clad arc quenching mediumOutdoor ZW7
l ZW7-27.5 series high voltage out door circuit breaker can be used for 50HZ 40. 5kv outdoor high voltage electrical equipment.
l Attached spring operating structure and electromagnet operating structure can manipulate electric opening and closing in a distance, or accumulate energy for manual operation.
l The design performance strictly sticks to our national standard GB1984-89 for high voltage alternating current vacuum circuit breaker, and meet the requirements of International Electro technical Commission (IEC) IEC-56 for high voltage alternating current vacuum circuit breaker.
l Mainly used in controlling and protection of outdoor power transmission and transformation system of 35kv, also in normal operation and short-circuit protection for all kinds of power grid and frequent operation place.
l Highest system voltages Um related to the rated voltages are defined in IEC 60071-1.
l These series of VCBs are ceramic pillar type.
l Vacuum interrupter is installed in upper part of ceramic insulator.
l It has characteristics of well tightness and high temperature endurance, non-combustion and non-exploration, easy mounting, anti-aging and long service life.
Ambient condition
1. Altitude: up to 2500m
2. Ambient temperature: max +50°C min -35°C
3. Maximum daily average temperature °C 40
4. Wind pressure: ≤700Pa (equals to wind speed 37.5m/s)
5. Earthquake intensity: ≤8 degree (as per terms UBN-97: Zone 1)
6. Air contamination degree: degree
7. Max daily temperature variation: ≤25°C
8. Maximum solar radiation: ≤1035 W/m²
9. Isokeraunic level: ≤70
10. Average rainfall annually: ≤1400 mm/a
Mechanical Data
|
Main Technical Data |
|
|
||
|
Rated voltage |
kv |
27.5 |
||
|
Rated frequency |
Hz |
50 |
||
|
Rated lighting impulse withstand voltage |
kv |
185 |
||
|
Rated short-time power frequency withstand voltage(dry) |
kv |
95 |
||
|
Rated short-time power frequency withstand voltage(humid) |
kv |
80 |
||
|
Rated current |
A |
1250 |
1600 |
2000 |
|
Rated short-circuit breaking current |
kA |
20 |
25 |
31.5 |
|
Rated short-circuit making current |
kA |
50 |
63 |
80 |
|
Rated short-time withstand current |
kA |
20 |
25 |
31.5 |
|
Rated peak withstand current |
kA |
50 |
63 |
80 |
|
Rated operations of short-circuit breaking current interruption |
times |
20 |
||
|
Full opening time |
s |
0.1 |
||
|
Rated operating sequence |
|
0-0.3s-CO-180s -CO |
||
|
Rated duration of short-circuit |
s |
4 |
||
|
Rated single capacitor bank breaking current |
A |
400 |
||
|
Contact erosion limit |
mm |
3 |
||
|
Mechanical life |
times |
20000 |
||
|
Weight |
kg |
1100 |
||
Company website:
http://feiteelectric.en.made-in-china.com
Comtact person:Willow Chen
Professional, Creative, Good quality and Excellent service
Welcome your inquiry, Welcome our cooperation!
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