麦收时节,骄阳似火。一天中午,某村麦场上浓烟滚滚,火苗冲天,一场大火使农民兄弟辛苦一年收获来的7万多斤小麦顷刻间化为灰烬,损失4万余元。 造成这次麦场起火的原因是这样的:该麦场用的打麦机的电源,接在架在麦场上的临时木电杆上,木电杆上安装一小型控制箱。但从小控制箱引至打麦电动机的是三根铝芯橡皮绝缘电线,直接拖放在地上。三根线的中间均有接头,接头用黑胶布包扎,其中有两个线头没有错开。由于黑胶布包扎的线头受潮,绝缘性能越来越差,相间泄漏电流逐渐增大。起火前某村民发现电线接头处有“啪、啪……”放电声,遂用螺丝刀欲把两根线隔开,但刚将螺丝刀插入,即引起相间短路,弧光立刻引燃了附近的麦草而酿成惨祸。 通过这起麦场大火,应从中吸取的教训是: 1.场间所有线路和用电设备,均应由电工安装,并 Wheat harvest season, the sun seems like fire. One day at noon, a village of wheat fields billowing smoke, the sky flames, a fire peasant brothers harvested a year to more than 70,000 kilos of wheat into an instant ashes, the loss of 4 million yuan. The cause of the fire in the field was such that the power supply to the wheat field was connected to a temporary wooden pole mounted on a wheat field and a small control box mounted on the wooden pole. But the small control box leads to the wheat motor is three aluminum core rubber insulated wire, directly on the ground. There are joints in the middle of the three wires, the joints are covered with vinyl tape, two of which are not staggered. Due to the vinyl tape banding damp, insulation performance is getting worse, phase leakage current gradually increased. Before the fire, a villager found that there was “pop, pop ......” discharge sound at the wire joint, and then he wanted to separate the two wires with a screwdriver. However, just inserting the screwdriver, which caused short-circuit between phases, the arc immediately ignited the wheat straw nearby Lead to disaster. Lessons learned from this blast of cornfields are: 1. All wiring and electrical equipment in the field should be installed by an electrician and