This kind of situation in the low voltage cable performance is not outstanding, performed very well in the medium voltage cable. Sometimes cable factory test without any problems, laying the site due to the limitation of various conditions on cable directly without taking any measures in winter construction, cable laying completed after the scene test everything is normal, but later came a very short time, the power failure, anatomic failure point, appearance without any mechanical damage, but the internal insulation happens serious breakdown and ablation.
Anyte cable |
In recent years, some new installation of medium voltage 10kv, 35kv cable fault due to various constraints, not at the scene to cable heating measures, directly around 10 ℃ below zero in winter construction installation on site. The power cable in a short time and white and relatively insulation breakdown fault, by accident, cable production and factory test did not appear abnormal, the scene completion test also smoothly. But electrify malfunction in short time, with no doubt this wire and cable to cable heating measures in winter construction is not relevant.
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