Centrifugal fan requires emergency stop in the following situations. The operation of the emergency stop is to push the main motor stop button, and then handle the problem of after stop.
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A. Centrifugal fans break out sudden strong vibration, and vibration amplitude is more than tripping values.
B. The centrifugal fan body internal parts have touch scraping or abnormal friction sound.
C. Bearing or sealing parts have smoke, or the bearing temperature rise sharply to the alarm value.
D. Oil pressure is lower than the alarm value and can not return to normal value.
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E. The liquid level of oil tank is low, and empty absorption phenomenon has appeared.
F. Axis displacement values appear obvious sustained growth, and achieve alarm value.