Electric Protection System Energize-To-Run For Generator Set, Industrial and Marine Diesel Engines Caterpillar


Overspeed Calibration

Usage:

3304 10E



图 1g00564355

7W-2743 电子转速开关(ESS)

(1) 超速确认按钮

(2) 复位按钮

(3) 超速指示灯

(4) 密封螺塞以调整发动机转速

(5) 密封螺塞以调整盘机终止转速

(6) 密封螺塞以调整机油步位压力转速设定值

按下超速确认按钮时,超速标定可提高超速设定值,或超速标定可降低超速设定值,以关闭发动机。 发动机以超速设定的 75% 运转时,超速设定值正确。 按下超速确认按钮时,发动机随之关闭。

使用以下步骤调整超速设定值。

  1. 从密封螺塞 (4) 上拆下安全锁线和密封圈。 从超速调整螺钉的检修孔上拆下密封螺塞 (4) 。

  1. 使用小螺丝刀以 "MAX(最大值)"箭头方向或顺时针方向轻轻地转动超速调整螺钉。 将螺钉转动 20 次。 超速调整螺钉可改变 ESS 内的电位计设定值。 超速调整螺钉不会导致电位计损坏。 而且,如果螺钉以错误的方向转动,则无法拆下螺钉。

  1. 以所需超速设定值转速的 75% 运转发动机。 请参阅转速技术规格图。

  1. 发动机以超速设定值转速的 75% 运转时,按下 "VERIFY(确认)"按钮 (1) 。 按下按钮时,以与 "MAX(最大值)"箭头相反的方向或逆时针方向缓慢转动超速调整螺钉,直至超速指示灯 (3) 亮起。 如果 ESS 连接至燃油关断电磁阀(FSOS)和空气关断电磁阀,如有配备,发动机将关闭。

  1. 为使 ESS 复位,按下 "RESET(复位)"按钮 (2) 。 必须手动复位空气关断阀,如有配备。

  1. 顺时针方向缓慢转动超速调整螺钉一圈。 重复步骤 3、4 和 5。 可能需要更多调整,获得正确的设定值。 顺时针方向转动超速调整螺钉,增加超速设定值。 逆时针方向转动超速调整螺钉,降低超速设定值。

  1. 超速设定值正确时,在超速调整螺钉的检修孔中安装密封螺塞 (4) 。 将螺钉拧紧至 0.20 ± 0.03 N·m (1.8 ± .3 lb in) 的扭矩。 如果盘机终止转速标定和机油步位转速标定也完成,则安装安全锁线和密封圈。

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