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Detailed Product Description
ZN28-12 Indoor AC Vacuum Circuit Breaker (VCB) is
mainly equipped inside the mantal-enclosed switchgear to protect
and control the electrical equipments. It confirms to the standards
of IEC 60056.
Technical parameter
serial number
Item
Uint
Data
20KV
25KV
31.5KV
40KV
1
Rated voltage(KV)
KV
12
2
Rated current(A)
A
630,1000
1250
1250,1600
1250,1600
2000,2500
1600,2500
3150
3
Rated short-circuit break current
KV
20
25
31.5
40
4
Rated short-circuit close current(peak value)
KV
50
63
80
100
5
Rated peak value withstand current
KV
50
63
80
100
6
4SRated little withstand current
KV
20
25
31.5
40
7
Rated in sulation level
Industrial frequency withstand voltage
KV
45(fracture48)
Thunder impulse withstand voltage
75fracture84
8
Rated operation order
Off-0.3s on and off-180s-on and off
9
Mechanical life-span
times
10000
10
Rated short-circuit cruuent break and close
time
times
30
20
11
Speak and move organization amount equal to the
voltage of the floodgate(DC)
V
110,220
220
12
Speak and move mechanism amount shut the electric
current of floodgate(DC)
A
71
128
13
Speak and move organization amount assign the
voltage of the floodgate(DC)
V
110,220
14
Speak and move organization amount assign the
electric current of floodgate(DC)
A
3.0,1.5
15
Switching distanc of the contact
mm
11
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