8271-320  WOODWARD 负载传感器 检查速度控制和执行器

以下步骤仅检查速度控制和执行器，它们必须在并联发电机之前正常工作。由于大多数故障都是在原动机首次运行时出现的，因此这种循序渐进的方法可以在大多数问题发生之前消除它们。第5章(故障排除)的主要部分是进行这些检查。

如果使用负载传感器，暂时拆除速度控制端子11和12和临时跳线端子11至12。在这些试验中，不得并联发电机。如果使用斜坡发生器，暂时拆除速度控制端子10处的电线。如果电容器连接到端子10以提供卸载和加载之间的斜坡，则必须在此测试或校准期间将其移除。保持空转开关接线连接。按指示的顺序进行检查。本节中的端子编号指的是速度控制。

检查所有电气连接是否正确，接线端子螺丝是否紧固;磁性拾音器安装正确，卡箍螺母紧固;执行机构和连杆牢固紧固。如果启动燃油限制存在，在这些测试中，将调整完全顺时针旋转。如果双动态存在，设置开关关闭为慢动态。
现在不要启动原动机。打开调速器电源。如果保险丝或断路器在通电后立即打开，则电池极性(端子14和15)可能是相反的。当电源打开时，执行器轴可以跳跃，但必须迅速回到最低燃料位置。检查1号端子(+)和2号端子(-)的电池电压。512/1712控制必须从10到16 Vdc, 524/1724控制必须从20到32 Vdc。
断开7号端子上的接线或跳线。从端子2(-)到7(+)测量7.2±1.0 V[双动态控制端子2(-)到9(+)]。如果电压正确，将接线重新安装到7号端子。如果电压不正确，请勿使用控制器。

The following steps check only the speed control and actuator, which must work correctly before paralleling the generator. Since most faults appear when the prime mover is first run, this step-by-step approach eliminates most problems before they occur. The main part of Chapter 5 (Troubleshooting) is doing these checks.

If a Load Sensor is used, temporarily remove the wires at speed control terminals 11 and 12 and temporarily jumper terminals 11 to 12. The generator must not be paralleled during these tests. If a Ramp Generator is used, temporarily remove the wire at speed control terminal 10. If a capacitor is connected to terminal 10 to provide a ramp between unloaded and loaded, it must be removed during this test or calibration. Leave the idle-rated switch wiring connected. Do the checks in the order indicated. Terminal numbers in this section refer to the speed control.

1. Check that all electrical connections are correctly made and terminal screws are tight; the magnetic pickup is properly installed and the jam nut is tight; the actuator and linkage are securely fastened. If start-fuel limit is present, turn the adjustment fully clockwise during these tests. If dual dynamics are present, set the switch closed for slow dynamics.

2. Do not start the prime mover now. Turn on governor power. If the fuse or breaker opens as soon as power is applied, the battery polarity (terminals 14 and 15) is probably reversed. The actuator shaft can jump when power is turned on, but must quickly come back to the minimum fuel position. Check the battery voltage at terminal 1 (+) and 2 (–). It must be from 10 to 16 Vdc for 512/1712 controls, and from 20 to 32 Vdc for 524/1724 controls.

3. Disconnect any wiring or jumper on terminal 7. Measure 7.2 ±1.0 V from terminal 2 (–) to 7 (+) [terminals 2 (–) to 9 (+) for dual-dynamics control]. Reinstall the wiring to terminal 7 if voltage is correct. Do not use the control if voltage is incorrect.