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● Outline
The ZN28A-12 series indoors high vacuum circuit breaker is the three phase ac 50Hz rated voltage is the 10kv indoors installment, mainly is installs in the stationary switch cabinet makes the electrical facility for the industry and mining enterprise power plant and the transformer substation the protection and the control using of, and is suitable the frequent operation the place This model vacuum circuit-breaker conforms to GB1984 - 1,989 "A.c. high voltage Circuit breaker" the standard stipulation
● Use environment and condition
A. The ambient temperature is not higher than +40 ℃ , is not lower than -10 ℃ (permission in -30 ℃ time storage and transport);
B. The sea dials highly is not bigger than 1000 or is not bigger than 3000 (sea to dial highly should in ordering note);
C. The air relative humidity date mean value is not bigger than 95% The monthly mean value is not bigger than 90% full gas and steams the steam pressure daily average value not to be bigger than 2.2×10-3Mpa; The monthly mean value is not bigger than 1.8 × 10-3Mpa;
D. Earthquake does not surpass 8;
E. Does not have the fire, the detonation, the serious contamination chemistry corrosion and the fierce vibration place
●Product main technology parameter
a.The fixed parameter see Table 1
|
Serial number |
Name |
Unit |
ZN28A-12/
1000.1250-20 |
ZN28A-12/
1250.1600-25 |
ZN28A-12/1600
2000-31.5 |
ZN28A-12/
1250.3150-40 |
|
1 |
Rated voltage |
kv |
12 |
12 |
12 |
12 |
|
2 |
Nominal current |
A |
630.1000.1250 |
630.1250.1600 |
1250.1600.2000 |
2000.2500.3150 |
|
3 |
The rating short-circuits the drop-out current |
KA |
20 |
25 |
31.5 |
40 |
|
4 |
The rating short-circuits the pass to gather the electric current |
KA |
50 |
63 |
80 |
100 |
|
5 |
The rating moves the steady state current |
KA |
50 |
63 |
80 |
100 |
|
6 |
Fixed heat-stable electric current |
KA |
20 |
25 |
31.5 |
40 |
|
7 |
Fixed heat-stable time |
S |
4 |
4 |
4 |
4 |
|
8 |
The rating short-circuits the drop-out current to open breaks the number of times |
time
|
50 |
50 |
50 |
50 |
|
9 |
Fixed operation sequence |
|
C — 0.3s — CO — 180s— CO |
|
10 |
1min labor frequency pressure resistance (has effect value) |
kv |
42 |
42 |
42 |
42 |
|
11 |
Lightning surge voltage |
kv |
75 |
75 |
75 |
75 |
|
12 |
Mechanical life |
time |
10000 |
10000 |
10000 |
10000 |
b. The machinery adjustment parameter see Table 2
|
Serial number |
Name |
Unit |
Data |
|
1 |
The contact opens the distance |
mm |
11 ± 1 |
|
2 |
Contact travelling schedule |
mm |
4 ± 1 |
|
3 |
Three-phase analysis and synthesis floodgate no same time |
ms |
≤ 2 |
|
4 |
Gathers floodgate the contact bounces the time |
ms |
≤ 2 |
|
5 |
Alternates with the center distance |
mm |
250 ± 5 |
|
6 |
Evenly divides equally the floodgate speed (in front of contact oil buffer) |
m/s |
0.7 ± 1.3 |
|
7 |
Average gathers floodgate speed |
m/s |
0.4 ± 0.8 |
|
8 |
Moves contact accumulation permission attrition thickness |
mm |
3 |
|
9 |
Each electric conduction return route resistance |
μΩ |
≤ 45(31.5KA 为 for 40) |
•The contour and installs the size
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