CT8-D系列SF6断路器用高压陶瓷电容器CT8-D series HV ceramic capacitor used for SF6 circuit breakers
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l 产品特点
耐电强度高，体积小，可靠性高。
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l 主要用途
用于SF6高压断路器的断口并联，
可均匀断口电压，改善开断特性。
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l Features
1. Small size.
2. Low dissipation factor and low heating value.
3. High strengh of dielectric.
4. High reliable internal construction.
5. Using strontium titanate for dielectric material.
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l Application
1. HV SF6 circuit breakers voltage distribution systems.
2. Pulse HV power supplies.
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图例：CT8-D系列
 
1. 产品名称的表示方法 (Explanation of Part Numbers)
例(Example) ： CT8-D-3
其中(Thereinto)：CT8-D 表示系列编号(Code of series)
3 表示类型编号(Code of product type)
2. 产品规格 (Product profile)
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产品名称
Part no.
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额定电压
Rated voltage
（kVAC）
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静电容量
Capacitance（pF）
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容量偏差
Capacitance
tolerance(%)
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外形尺寸(mm)
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φD
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φd
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L
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H
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R1
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R2
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CT8-D-3
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20
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400
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±10
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30
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10
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35
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32
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2
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0.5
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CT8-D-4
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20
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650
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36
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10
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35
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32
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2
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0.5
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CT8-D-6
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20
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910
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40
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10
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33
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30
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3
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0.5
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3. 产品性能 (Electrical characteristics)
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序号
No.
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项目
Items
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技术指标
Specifications
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测试条件
Testing method
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1
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使用温度范围
Operating Temp.Range
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-25—+85℃
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——
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2
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静电容量
Capacitance
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规定允许的误差范围内
Within the specified Tolerance
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在25℃ ，1±0.1kHz ，1V rms
条件下测量
Measured at25℃ with 1± 0.1kHz
and 1V (rms)
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3
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温度特性
Temperature Characteristics
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D
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-25℃、+85℃时的电容量相对于+25℃
时的变化
Compared with the value measured at 25℃, the capacitance change from -25℃ to 85℃ should not exceed the
limit specified.
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4
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介质损耗角正切值
Dissipation Factor
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CT8-D-3
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＜0.3％
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CT8-D-4
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＜0.3％
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CT8-D-6
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＜0.3％
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同2项
The same as No.2
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5
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耐压测试
Withstand voltage
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可耐压，无击穿，无闪络
No failure
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CT8-D-3
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45kVAC/1min
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CT8-D-4
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60kVAC/1min
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CT8-D-6
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60kVAC/1min
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6
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冲击耐受电压
Impact voltage
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无击穿
No failure
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1.2/50μs，正负极性各三次
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CT8-D-3
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110kV
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CT8-D-4
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120kV
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CT8-D-6
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120kV
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7
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局部放电起始电压
Partial discharge
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＜4pC
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CT8-D-3
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35kV
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CT8-D-4
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30kV
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CT8-D-6
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30kV
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8
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绝缘电阻值
Insulation resistance
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>105MW
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直流1kV充电60秒后测试
Measured with DC 1kV within 60sec.of charging under room condition.
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