40.5kV Outdoor Vacuum Circuit Breaker
Product Overview And Usage
ZW7A-40.5: CT is built-in or externally, and the external insulation is the physical appearance of silicone rubber or porcelain.
Product Model And Meaning
Working Conditions
Normal use conditions
a. Ambient air temperature, minimum -30°, maximum +40°; the average temperature measured within 24 hours does not exceed 35°;
b. The altitude does not exceed 1000m;
c. The pollution level of the surrounding air shall not exceed level II;
d. The surrounding air is not obviously polluted by dust, smoke, corrosive or flammable gas, steam or salt spray;
e. The thickness of icing shall not exceed 20mm;
f. The wind speed is not more than 34m/s;
g. The seismic fissure does not exceed 8 degrees;
h. Humidity conditions:
The average value of relative humidity measured within 24h, not exceeding 95%;
The average value of the water vapor pressure measured within 24h does not exceed 2.2kPa;
The average monthly relative humidity does not exceed 90%;
The average monthly water vapor pressure does not exceed 1.8kPa;
If the above-mentioned normal use conditions are exceeded, please consult with the manufacturer in advance, and please specify when ordering;
Abnormal use conditions
Including the extreme use environment such as altitude above 1000 meters, rapid temperature change, icing above 20mm, heavy pollution, severe condensation, mildew, sand, dust, severe cold, scorching heat, vibration, impact, swing, etc., please negotiate in advance when ordering.
Main Technical Parameters Of Zw7 Series Products
No. |
Description |
Unit |
Data |
||
1 |
Rated voltage |
kV |
40.5 |
||
2 |
1min Rated power frequency withstand voltage 1min |
kV |
95 |
||
3 |
Rated lightning impulse withstand voltage |
kV |
185 |
||
4 |
Rated frequency |
Hz |
50 |
||
5 |
Rated current |
A |
630, 1250, 1600, 2000, 2500 |
||
6 |
Rated short-time withstand current |
kA |
20 |
25 |
31.5 |
7 |
Rated peak withstand current |
50 |
63 |
80 |
|
8 |
Rated short-circuit breaking current |
20 |
25 |
31.5 |
|
9 |
Rated short-circuit making current |
50 |
63 |
80 |
|
10 |
Rated short-circuit duration |
s |
4 |
||
11 |
DC component of rated short-circuit breaking current |
|
51 |
||
12 |
Peak value of transient recovery voltage (TRV) |
kV |
114 |
||
13 |
Rated power supply voltage of closing and opening devices and auxiliary circuits |
V |
DC/AC 220V,DC/AC 110V |
||
14 |
Rated operating sequence |
|
O-0.3s-CO-15s-CO |
||
15 |
Opening time |
ms |
20~50 |
||
16 |
Closing time |
30~80 |
|||
17 |
DC time constant of rated short-circuit breaking current |
45 |
|||
18 |
Rated cable charging breaking current |
A |
50 |
||
19 |
Service life |
|
E2-C2-M2 (10000) |
||
20 |
Rated short-circuit breaking current breaking times |
Times |
20 |
Assembly Adjustment Parameter Table Of Zw7 Series Products
No. |
Description |
Unit |
Data |
1 |
Contact opening distance |
mm |
20±2 |
2 |
Contact stroke |
4±1 |
|
3 |
Average closing speed (measurement contact just before closing to 10mm before closing) |
m/s |
0.8±0.3 |
4 |
Average opening speed (measurement contact is just divided to 10mm apart) |
1.6±0.3 |
|
5 |
Bounce time of contact closing |
ms |
≤5 |
6 |
Bounce time of contact closing |
≤2 |
|
7 |
Three-pole contact opening in different periods |
≤2 |
|
8 |
Main circuit resistance of each pole |
μΩ |
≤100(Without instrument transformer) |
9 |
Note: The above parameters refer to the rated operating voltage |
Installation Dimensions
At an altitude of 1000 meters (center distance of 710mm), an altitude of 2000 meters (center distance of 780), and an altitude of 3000 meters (center distance of 850), the overall dimensions of the circuit breaker are as follows:
At an altitude of 4000 meters (center distance 920), at 5000 meters (center distance 1000) meters, the overall dimensions of the circuit breaker are as follows: