CT8-B系列氧化锌避雷器用均压电容器
CT8-B series HV ceramic capacitor used for
ZnO lighting arrester
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l 产品特点
高介电常数，低介质损耗，很好的电容温度稳定性。
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l 主要用途
用于500kV、750kV、1000kV氧化锌避雷器的并联电容器，周围介质为空气，氮气或SF6气体。
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l Feature
1. High permittivity, low dissipation factor
2. Capacitance values are largely unaffected by
the changes of temperature.
3. Using barium titanate for dielectric material
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l Application
Used for 500kV, 750kV and 1000kV ZnO lightning arrester voltage distribution systems, and the surrounding gas can be air, N2 or SF6 .
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图例：CT8-B
 
1. 产品名称的表示方法 (Explanation of Part Numbers)
例(Example) ： CT8-B-1
其中(Thereinto)：CT8-B 表示系列编号(Code of series)
1 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
（1V1kHz pF）
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静电容量（额定电压下 pF）
Capacitance (UR)
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容量偏差
capacitance tolerance
(%)
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外形尺寸
Dimension（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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R
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CT8-B-1
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3.5
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500
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700
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±10
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24
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6
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26
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23
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2
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CT8-B-5
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3.85
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785
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1100
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30
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10
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26
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23
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2
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CT8-B-6
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3.85
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250
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350
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24
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6
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26
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23
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2
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CT8-B-10
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3.4
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860
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1210
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33
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10
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27
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24
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2
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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℃，1kHz ，1V和额定电压条件下分别测量
Measured under 25℃, 1kHz, 1V and rated voltage.
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3
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温度特性
Temperature Characteristics
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B
Y5P
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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 (D.F.)
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≤1.5%
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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-B-1
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17.5kVAC/1min
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CT8-B-5
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17.5kVAC/1min
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CT8-B-6
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17.5kVAC/1min
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CT8-B-10
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15kVAC/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-B-1
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35kV
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CT8-B-5
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30kV
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CT8-B-6
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30kV
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CT8-B-10
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30kV
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7
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局部放电
Partial discharge
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＜3pC
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CT8-B-1
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≥8kVAC
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CT8-B-5
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≥8kVAC
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CT8-B-6
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≥8kVAC
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CT8-B-10
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≥8kVAC
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8
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绝缘电阻值
Insulation resistance
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>1.5×104MW
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直流1kV充电60秒后测试
Measured at 25℃, 1kVDC for 60s
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