【Q&A Question 010】April 30, 2016
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This post was last edited by liuquan1100 on 2017-8-7 21:39. [Q&A Question 010] April 30, 2016: What are the various ways to shut down a circulating machine? The answer key will be available after responding; scoring is based on addressing the key points. Indoor stop button, on-site stop button, on-site stop handle, emergency cut-off switch.
There are normal shutdowns and fault shutdowns. A so-called normal shutdown refers to a planned shutdown. A fault shutdown refers to the situation where, in the event of an abnormal condition in the unit, protective devices are activated or a manual shutdown is carried out in order to prevent damage to the unit or to minimize losses. Fault shutdowns are further divided into emergency shutdowns and routine fault shutdowns. During normal shutdown, it is further divided into two methods based on the parameters during the shutdown process: ramp-down shutdown and rated-parameter shutdown. The method of shutting down is determined based on the purpose of the shutdown and the condition of the equipment. For a normal shutdown, if it is intended for maintenance purposes and it is desired to cool the unit as quickly as possible so that the maintenance can begin sooner, a reduced-parameter shutdown should be used whenever possible. Moreover, the duration of this reduced-parameter shutdown should be extended, with the parameters being lowered as much as feasible.
Normal shutdown, interlock shutdown, emergency shutdown, etc
Press the indoor shutdown button, press the outdoor shutdown button, use the on-site manual shutdown handle, and use the on-site manual handle to operate the emergency cut-off switch
Automatic shutdown (power outage, cascading shutdown, fault shutdown), manual shutdown
On-site shutdown button, remote shutdown button, on-site shutdown handle, emergency cut-off device
Can’t understand: normal electronic interlocking, mechanical interlocking, or emergency shutdown?
Indoor shutdown button, on-site shutdown button, on-site shutdown handle, emergency cut-off switch
Normal shutdown, interlock shutdown (i.e., automatic shutdown when parameter alarms reach their upper limits), and shutdown due to fault