How can the instrumentation field provide electrical load information to the electrical engineering field?
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For example, in a project, AI accounts for 100 points; of this, 40 points are related to redundancy, 50 points to DI, 60 points to AO, 80 points to DO, and 90 points to RTD. There are also 20 externally powered flow meters (24V DC), 30 solenoid valves (24V DC), and 5 chromatographs. Could an expert calculate the electrical load required by these instruments and suggest an appropriate value? How much should be set aside as a reserve?
Bro, as for the system’s power consumption, it is determined by the integrator, mainly based on the power usage of the equipment inside the cabinet and that of other electrical devices. As for those on-site instrumentation devices, you can see that it’s all specified in their respective specifications. However, you need to clearly distinguish between VA and KW.
LS is right; it seems that KW is not equal to KVA. What is the relationship between these two?
KVA includes both active power and reactive power; it is known as apparent power. This post was last edited by qf2008 on 2009-4-17 at 16:02.]
I would like to ask the experts: Does the AC power consumption value inside the cabinet already include the calculated value of the subsequent DC power consumption (at points that are not powered from an external source)? When applying for an increase in funding, it’s sufficient to provide the sum of the AC power consumption values of several controllers, right?
Manufacturers of various devices such as AI, DI, AO, and DO all provide nameplate specifications that include capacity (kVA, kW). Add up the capacities of the spare devices and perform the calculations yourself. The sum of these capacities primarily determines the size of UPS that needs to be purchased; by increasing the UPS capacity appropriately, it can then be submitted to the electrical engineering team.