Electronic Modular Control Panel II+ (EMCP II+) Caterpillar


Starting Motor Magnetic Switch - Test - EUI Engines Only

Usage:

3412C 4BZ



图 1g00680589

起动马达继电器的系统示意图(SMR)




图 2g00737896

接线盒和起动马达电磁开关

带有两台起动马达的系统中使用有两个起动马达电磁开关(SMMS)。 一台起动马达使用一个开关。

测试步骤

  1. 从控制面板下方将 DC 接头 2 从控制面板上断开。 从控制面板下方使用 7X-1710 万用表探针 测量接头触点 6(SMMS)和接头触点 11("B-")之间的电阻。 得到的电阻测量值应在以下范围内。

    • 对于单起动马达系统:26 至 33 欧姆

    • 对于双起动马达系统:26 至 33 欧姆

    如果电阻不正确,更换有故障的电磁开关。 如果电阻正确,进行步骤 2。

  1. 断开从小齿轮电磁阀到起动马达的电缆。 对于双起动马达系统,请在两个起动马达上执行该步骤。

  1. 在 SMMS 处的接线盒内,将万用表的正极电缆连接至端子 TS1-24,负极电缆连接至发电机壳体中的 TS1-25。 如果在双起动马达系统中测试第二个电磁开关,则将负极电缆连接至端子 TS1-26。

    注: 步骤 4 的跨接导线仅可保持连接 10 秒钟。

  1. 暂时在端子 1("B+")和端子 4 之间连接一根跨接导线。 测量出电压后,立即断开该导线。 请勿让该导线保持连接超过 10 秒钟。 正确的测量值会从 24 DCV 左右变化至 2 DCV 左右。

如果电压高于 2.0 DCV,更换电磁开关。 如果开关通过步骤 1 和步骤 4 的要求,则表明开关工作正常。 重新连接本步骤中断开的导线和电缆。

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