20KV热缩电缆附件简介:
20KV热缩电缆附件包括热缩电缆终端和热缩电缆中间接头,适用于电缆截面积,25-630mm2.
20KV热缩电缆附件技术指标:
序号 No. | 试 验 项 目 Testing Items | 试验条件及标准 Testing Conditions and Standards | 试 验 结
果 Results | 备注 Remarks |
1 | 工频耐压 | 54kV5min 不闪络、不击穿 | 通过 Pass | |
2 | 局部放电 Partial discharge test | 在20kV下,放电量≤10pc The magnitude of the discharge at 20kV shall not exceed 10pc | 通过 Pass | |
3 | 冲击电压试验 Impulses voltage test | 125kV,±10次 不闪络、不击穿 Neither breakdown nor flashover shall occur at 10 positive and 10 negative impulses of 125 kV | 不击穿、不闪络 No breakdown no flashover | |
4 | 恒压负荷循环(在空气中)Heating cycle (in air) | 导体施加电压35kV,并加热至(95-100)°C。其中温度稳定2h,冷却3h,共3次循环。Temperature stability 2h, cooling 3h,3 cycles in air at the conductor temperature of 95°C to 100 °C and 35kV
| 不击穿及由以下试验评定试验结果 No breakdown. Evaluation by the following test results | |
5 | 局部放电(正常运行时导体最高温加5-10°C) Partial discharge(at the normal operation the conductor's high temperature add 5-10 °C) | 在20kV下,放电量≤10pc The magnitude of the discharge at 20kV shall not exceed 10pc | 通过 Pass | |
6 | 恒压负荷循环试验 Heating cycle voltage test | 导体施加电压35kV,并加热至(95-100)°C。其中温度稳定2h,冷却3h,共60次循环。(30次在空气中,30次在水中) Temperature stability 2h, cooling 3h ,60 cycles at the conductor temperature of 95°c to 100 °c and 35kV(30 times in air and 30 times in water) | 不击穿及由以下试验评定试验结果 No breakdown. Evaluation by the following test results | |
7 | 局部放电(正常运行时导体最高温加5-10°C和环境温度下)Partial discharge(at the normal operation the conductor's high temperature add 5-10 °C and environment and temperature) | 在20kV下,放电量≤10pc The magnitude of the discharge at 20kV shall not exceed 10pc | 通过 Pass | |
8 | 热稳定试验 Thermal short-circuit test | 在23kA下,短路2次,无可见损伤 No visible deterioration at 23kA,2 short circuit | 通过 Pass | |
9 | 动稳定试验 Dynamic short-circuit test | 在81kA下,短路1次,无可见损伤 No visible deterioration at 81kA,1 short | 通过 Pass | |
10 | 冲击电压试验 Impulses voltage withstand | 125kV,±10次 | 不击穿、不闪络 No breakdown no flashover | |
11 | 交流耐压 AC withstand voltage test | 30kV,15min. | 不击穿、不闪络 No breakdown no flashover | |
12 | 潮湿试验 Humidity tests | 15kV,300h | 不发生击穿、闪络和过电流释放 No breakdown no flashover no over-current release | 户内终端 Indoor Termination |
13 | 盐雾试验 | 15kV,1000h | 不发生击穿、闪络和过电流释放 No breakdown no flasho | 户外终端 Outdoor Termination |
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