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| 标准Stands | ||||||||||||||||||||
| GB/Z 18890-2002《额定电压220kV(Um=252kV)交联聚乙烯绝缘电力电缆及其附件》 IEC 62607:1999 《额定电压150kV（Um=170kV)以上至550kV（Um=550kV）挤出绝缘电力电缆及其附件-试验方法和要求》 |
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| 特性与用途Propety and Function | ||||||||||||||||||||
| 交联聚乙烯绝缘电力电缆导体工作温度高，传输容量大，电气性能优良，电缆附件简单，安装敷设方便等优点，因此在当今电力系统中使用广泛。 Cross-linked polyethylene insulated power cable are featured with high allowable working temperature of conductor,huge transmission capacity,excellent electric properties,simple cable accessories and convenient installment and laying, so that they are widely used in the power system today. 电缆适用于工频额定电压为127/220kV（Um=252kV),中心点直接接地的输电线路系统。 The cable can be applied to the neutral-point solid grounded power transmission line system with A.C.rated voltage 127/220kV(Um=252kV). |
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| 使用特性Properties of Applition | ||||||||||||||||||||
| 1.电缆正常运行时导体允许的长期最高温度为90℃ 1.During the normal operation of cables,the max permissible continuous operation temperature of conductor should not exceed 90℃ 2.短路时（最长持续时间不超过5秒）电缆导体允许的最高温度为250℃。 2.Conductor short-circuit temperature should not exceed 250℃(when max sustaining period will not exceed 5 seconds). 3.电缆安装时允许的最小弯曲半径一般为电缆直径的25倍。 3.The min permissible bending radius during the cable laying is normally 25 times of the diameter of cables. 4.电缆敷设时不受落差限制。 4.Free from restrictions of level difference along the route during the cable laying. 5.低于0℃敷设时，必须预先加温。 5.Pre-heated is needed when the temperature is below 0℃ during the cable laying. |
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| 型号名称 Type and Description | ||||||||||||||||||||
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220kV电力电缆