AOpen DE7200 Series Provozní pokyny stáhnout pdf (Strana 61)

OPERATING INSTRUCTIONS

30 Sep 13 4-23

DE-7200VFDCentrifuge

EMERGENCY SHUTDOWN

Two options are available to stop the centrifuge in an emergency: Electric power shutdown or

mechanical shutdown. The type of emergency dictates the shutdown method. If emergency is

electricity related, power must be shut down immediately. However, if the emergency requires the

fastest possible means of stopping the bowl, the alternative mechanical shutdown procedure

should be used to bring the bowl to a stop more quickly.

Electric Power Shutdown

1. Immediately interrupt power by pressing the EMERGENCY STOP button on the control

cabinet or centrifuge. The bowl will then coast to a stop, which may take more than 15

minutes.

Note!

Pressing EMERGENCY STOP immediately removes power from the bowl,

conveyor, and pump motors, allowing the bowl to coast to a stop. This may

take more than 15 minutes depending on the bowl

speed and amount of

material inside the bowl

2. Open the fused disconnect supplying electric power to the machine.

Mechanical Shutdown

The fastest method to stop the bowl is to click on STOP on the Operation screen or display the

Bowl VFD screen and click on Bowl Is Coasting, as shown in Figure 4-22, below. The bowl will

then be brought to a controlled stop by the bowl VFD. If a fault is present, the screen will display

the message Bowl Is Coasting; Fault Present. In this case, the fault must be cleared before VFD

control can be selected.

Figure 4-22. Bowl VFD Screen During Shutdown Under VFD Control

Note!

If a fault is present, controlled stoppage of the bowl motor is not possible

until the fault is cleared.

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AOpen DE7200 Series Provozní pokyny Strana 61