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   ZN28-12、ZN28A-12系列真空负荷开关为额定电压12KV,三相交流50HZ的高压户内开关设备。产品符合GB1984-89标准,该产品总体结构为开关本体与操作机构一体安装或开关本体与操作机构分离安装两面三刀种形式。一体式结构即为ZN28-12基本型;分体式结构为ZN28A-12型,适应于各种固定式开关柜,如GG-1A(Z) XGN2A10(Z)等。

   该产品可配用CD17、CD10A型直流电磁操动机构和CT17、CT19型弹簧储能式操动机构。

   It is used in the network of 12KV and three-phade AC 50HZ and meets GB1984-89 standard.The can be installed together with operating mecha-nism(ZN28-12 type)and installed separately (ZN28A-12 type),for all types of fixed switch cabin.

   It can be equipped with CD17 CD10A type DC electromagnetic operating mechanism and CT17 CT19 type spring-storing type operating mechanism.

主要技术参数 Technical parameter

名称
Name

 

单位
Unit
数据 Data
20KA
25KA
31.5KA
40KA
额定电压
Rated voltage
KV
12
额定电流
Rated current
A

630,1000

1250

1250,1600

1250,1600,

2000,2500

1600,2500

3150

额定短路开断电流
Rated short-circuit switch-off current

KA
20
25
31.5
40

额定短路关合电流(峰值)
Rated short-circuit controlly current (peak)

KA
50
63
80
100

额定峰值耐受电流
Rated peak withstand current

KA
50
63
80
100

4S 额定短时耐受电流
4S rated short-time withstand current

KA
20
25
31.5
40

额定绝缘水平
Rated insulating level

工频耐压(额定开断前后)
Power friquency withstand voltage (before and after rated switch-off)

KV
40(断口48)42(Break 48)

冲击耐压(额定开断前后)
Impulse resisting voltage (before and after rated switch-off)

KV
75(断口 84) 75(Break 84)

额定操作顺序
Rated operating order

分-0.3S-合分-180 S-合分

On-0.3S On-and-Off 180 S-on-and-Off

机械寿命
Mechanical life

次(times)
1000

额定短路开断电流开断次数
Breaking times of rated short-circuit switch-off current

次(times)
30
20

操动机构额定合闸电压(直流)
Operating mechanism rated witch-off voltage(DC)

V
110,220
220

操动机构额定合闸电流(直流)
Operating mechanism rated witch-off current(DC)

A
71
128

操动机构额定分闸电压(直流)
Operating mechanism rated witch-off voltage(DC)

V
110,220

操动机构额外负担定分闸电流(直流)
Operating mechanism rated witch-off current(DC)

A
3.0,1.5

触头开距
Contact distance

mm
11±1

超行程(触头弹筑压缩长度)
Ultra travel(length of contact spring compressing)

mm
4±1

三相分、合闸不同期性
Three-phase switch kn-and-off not the same period

ms
≤2

触头合闸弹跳时间
Contact switch-on jump time

ms
≤2

平均分闸速度(刚分6mm高)
Average wcitch-off speed

m/s
1.2±0.3

平均合闸速度
Average switch-on speed

m/s
0.6±0.2

分闸时间
Switch-off time

最高操作电压下
Under Max.operating voltage

s
≤0.06

最低操作电压下
Under Min.operating voltage

s
≤0.08

合闸时间
Switch-on time

s
≤0.2
≤20

各相主回路电阻
Each phase main return circuit resistance

≤40

动静触头允许磨损累积厚度
Automatec striking and grinding cumulative thickness

mm
3

油缓冲器缓冲行程
Oil cushioning buffer travel

mm
10

 

 

 

 

 

 

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