What power level or what conditions apply to pumps that require an electrical signal to be sent to the control room?
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I would appreciate some guidance from those who know more O(∩_∩)O Thank you
This also needs to be determined based on the design documents. From the examples I’ve encountered, only the motors of particularly important unit equipment have current supplied to the control room.
Everyone says so, but no clear regulations have ever been established to settle things definitively
Those over 37 kilowatts are led to the control room
It mainly depends on the importance of the equipment driven by the motor; even motors that are less than 37 KW and are very important will have current routed to the control room
Pumps that are particularly important in the process flow – those that can cause the plant to shut down due to interlocks or lead to serious safety incidents – are pumps whose load is closely related to the process conditions. For pumps whose load can be adjusted as part of the process, design considerations related to equipment safety and process requirements allow the current signal from the drive motor to be sent to the DCS or to any location where it is needed for display. What I am familiar with are mainly variable-frequency pumps; I have never seen ones that operate at the power frequency. Such as the high-pressure liquid oxygen pump in gasification units!
It’s 37kW, so there should be an on-site ammeter, right?
With variable frequency, it is necessary to introduce the current signal; during the discussion last night, this current signal was also introduced to the DCS for the motors that control the air coolers with variable frequency
Generally, there are process requirements, which have little to do with the power level.