Starter Ground Circuit Test Description
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图 1 | g01275957 |
本测试测量起动马达 (R) 接地导线的电压降。 测量测试点 (7) 和测试点 (3) 两端的电压降。
电压降会使起动马达接地回路的指示灯点亮。 电压降必须大于 1.30 ± 0.15 伏。 灯点亮是了为说明有缺陷。
仅在"测试步骤 B,起动"的过程中故障才会显示。
该故障可能的原因如下:
- 开关由于电压降过大而断开
- 连接至机架的电缆连接电压降过大
注: 将断开开关作为起动马达接地电路的一部分进行测试。
起动马达有三种接地方式。
- 将单电缆从蓄电池负极接线柱直接连接至起动马达负极接线柱。 测试点 1 连接至测试点 2。 分析仪无法检查电压降。
- 断开开关位于接地电缆中。 开关位于蓄电池负极接线柱和起动马达负极接线柱之间。 分析仪检查断开开关。 此外,分析仪检查开关连接至起动马达的电缆。
- 起动马达负极接线柱连接至机架上。 蓄电池负极接线柱连接至机架上的不同位置。 接头类型包括断开开关。 分析仪检查接头和开关。 在机架上清洁电缆接头通常可排除该故障。
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