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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 |
1 rated voltage |
kv |
12 |
12 |
12 |
12 |
|
2 |
nominal currents |
A |
630.1000.1250 |
630.1250.1600 |
1250.1600.2000 |
2000.2500.3150 |
|
3 |
fixed short-circuit drop-out current |
KA |
20 |
25 |
31.5 |
40 |
|
4 |
fixed to short-circuit the pass fixed to gather electric current |
KA |
50 |
63 |
80 |
100 |
|
5 |
to move the steady state current |
KA |
50 |
63 |
80 |
100 |
|
6 |
fixed thermally stable electric currents |
KA |
20 |
25 |
31.5 |
40 |
|
7 |
fixed thermally stable time |
S |
4 |
4 |
4 |
4 |
|
8 |
fixed to short-circuit the drop-out current to open break the number of times |
次 |
50 |
50 |
50 |
50 |
|
9 |
fixed operations sequence |
|
Minute — 0.3s — Gathers the minute — 180s— Gathers the minute |
|
10 |
1min labor frequency pressure resistance(Has
Effect value
) |
kv |
42 |
42 |
42 |
42 |
|
11 |
lightning surges voltage |
kv |
75 |
75 |
75 |
75 |
|
12 |
mechanical lives |
次 |
10000 |
10000 |
10000 |
10000 |
B. The machinery adjustment parameter see Table 2
|
Serial number |
Name |
Unit |
Data |
|
1 |
contact starts is apart from |
mm |
11 ± 1 |
|
2 |
contacts travelling schedules |
mm |
4 ± 1 |
|
3 |
three-phase minute Gathers Floodgate no Same time nature |
ms |
≤ 2 |
|
4 |
Gathers Floodgate contacts to bounce time |
ms |
≤ 2 |
|
5 |
to alternate with center distance |
mm |
250 ± 5 |
|
6 |
evenly to divide 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 |
accumulation permissions attrition thickness |
mm |
3 |
|
9 |
each electric conduction return route resistance |
μΩ |
≤ 45(31.5KA 为 40) |
• The contour and installs the size
ZN28A － 12/630A/1600A/2500A/3150A Minute writing style machine composition
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