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GREEGOO Electric Co.,Ltd.
No.6 Floor,Jinye Mansion, Lvzhuang, Liushi, Yueqing, Zhejiang, 325604 P.R. China
Tel: +86-577-62776000
Mob: +86-159 5877 6000
Fax: +86-577-62776006
E-mail: Peter@greegoo.com
Skype: greegoo_peter
MSN: greegoo_peter@hotmail.com
Visit us on the web at...
http://www.greegoo.com
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Vacuum Circuit Breaker (ZN28-12, ZN28A-12 indoor type)
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| Summarize |
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ZN28-12 series vacuum circuit breaker is HV indoor switchgear with rated 12Kv, Tri-phase AC50Hz. The product conforms to GB1984-89standard, the whole of which is 2catgory with installation of switch body disconnecting with operating mechanism and installation of switch body combined with operating mechanism. Integration body structure, namely, basic type N28-12; The product can match with CD17CD10A type DC electro-operating mechanism and CT17,CT19type spring energy storing type operating mechanism. |
Main technical specifications: |
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Type
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Unit
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Data
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20kA
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25kA
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31.5kA
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40kA
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Rated voltage
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KV
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12
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Rated current
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A
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630,1000
1250 |
1250,
1600 |
1250,1600
2000,2500 |
1600,2500
3150 |
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Rated short circuit breaking current
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kA
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20
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25
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31.5
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40
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Rated short circuit switch-off on current (peak value)
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kA
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50
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63
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80
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100
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Rated peak withstand current
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kA
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50
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63
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80
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100
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4Srated short time withstand current
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kV
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20
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25
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31.5
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40
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Rated insulating level
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1min P.F withstand voltage (rated switch-off before and after)
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kV
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42(fracture48)
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Impulse withstand voltage(rated switch-off before and after)
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75(fracture85)
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Rated operating sequence
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Break-0.3s-close and break-180s-close and break
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Mechanical endurance
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Time
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10000
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Rated short circuit breaking current breaking time
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Time
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30
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20
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Operating mechanism rated switch-on voltage(DC)
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V
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110, 220
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220
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Operating mechanism rated switch-on current(DC)
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A
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71
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128
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Operating mechanism rated switch-off voltage(DC)
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V
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110, 220
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Operating mechanism rated switch-off voltage(DC)
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A
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3.0, 1.5
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Opening distance of contact
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mm
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11+1
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Over travel of contact
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mm
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4+1
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Different period of three phade switch-off on
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ms
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≤2
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Bounce time of contact switch-on
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ms
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≤2
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Average switch-off speed
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m/s
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1.2+0.3
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Average switch-on speed
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m/s
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0.6+0.2
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Switch-off time
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Operating under max. voltage
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s
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≤0.06
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Operating under min. voltage
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≤0.08
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Switch-on time
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s
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≤0.1
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Each phase primary feedback circuit resistance
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μΩ
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≤50
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≤35
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Permit abrasion total thickness of dynamic and static contactor
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mm
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3
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Damping range of oil buffer
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mm
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10
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Dimension |
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| ZN28-12 acuum circuit breaker |
|
 |
 |
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Type
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20kA, 25kA, 31.5kA
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40kA
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Code
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a
|
b
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c
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d
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e
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f
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a
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b
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c
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d
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e
|
f
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Data
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230
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600
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707
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560
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293
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227¡À1
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275¡À1
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690
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842
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652
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342
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227¡À
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ZN28A-12 acuum circuit breaker |
|||
 |
 |
 |
 |
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Type
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20kA, 25kA, 31.5kA
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40kA
|
||
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Code
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a
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b
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a
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b
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Data
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250
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610
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275
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690
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Keywords: zn28-12, zn28a-12
