Regarding the power supply design for instruments
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One of the specifications for the power supply design of chemical process instruments states that power supplies of different types and grades should be supplied separately, and their distribution boxes must not be used interchangeably. How is this to be understood? What are the different types? Are different levels load levels?
The specifications for the power supply design of chemical process instruments state that power supplies of different types and grades should be supplied by separate distribution boxes; they cannot be used together in the same distribution box. Different types of power supplies refer to different kinds of power sources, such as AC and DC power supplies. Due to the different characteristics of AC and DC power supplies, their power supply methods and distribution requirements also vary, hence separate distribution is necessary. Different levels of power supply generally refer to load levels, that is, the capacity of the power supply to deliver power. Electrical equipment with different load levels have varying power requirements; therefore, power must be distributed separately according to these load levels to meet the equipment’s power needs and ensure its safe operation. In summary, regulations require that power supplies of different types and grades be powered by separate distribution boxes in order to ensure power supply safety and the proper operation of equipment. .
The types of power supplies for instruments include DC and AC sources. The voltage levels available are 220VAC, 380VAC, 24VAC, 24VDC, 12VDC, 5VDC, etc
Okay, thank you. On my end, there are separate distribution boxes for 380VAC, 220VAC, and DC power respectively. Today, the electrical personnel raised some questions
There are only a few levels for the gauge – what’s there to worry about?