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


Overspeed Verification Test

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

发动机以超速设定值的 75% 或更多运转时,超速确认测试可确保电子转速开关中的超速开关将导致发动机停机。

以额定转速运转发动机,并按下超速确认按钮 (1) 一会儿。 按钮可使开关通电,导致发动机停机。 当发动机转速是超速设定值的 75% 或更多时,按下按钮应发生发动机停机。 发动机超速设定值是额定发动机转速的 118%。

这是计算正确发动机超速设定值的一个例子。 额定转速为 1800 rpm 的发动机具有 2125 rpm 的超速设定值。 请参阅转速技术规格图。 超速设定值的 75% 时,超速确认测试会导致发动机停机。 超速设定值是额定发动机转速的 118%。 在这个例子中,2125 的 75% 是 1594 rpm。 发动机转速是 1594 ± 25 rpm 或更多,并按下超速确认按钮时,发动机将停机。

发动机停机后,由于发动机超速,超速指示灯 (3) 将保持亮起,直到按下复位按钮 (2) 。 按下复位按钮 (2) 一会儿后再起动发动机。 超速指示灯 (3) 将熄灭。 进气关断操纵杆和紧急停机开关(ES)也必须在起动发动机前复位。

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