Seeking help with issues between electrical systems and instruments
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Why are the wires in the electrical circuit and between the DCS some at 220VDC and some at 220VAC? Are high-voltage motors different from low-voltage motors?
It’s different: high-voltage motor control uses DC220V, while low-voltage motor control uses A,C220V
May I ask if the voltage measurement in this electrical circuit is taken with respect to ground? Still measure between wires?
May I ask if the voltage measurement in this electrical circuit is taken with respect to ground? Still measure between wires?
May I ask if the voltage measurement in this electrical circuit is taken with respect to ground? Still measure between wires?
What you’re saying has nothing to do with instruments at all
Are all DCS systems 24DC?
Electrical components and devices with 220V voltage can be controlled using 24V low-voltage power
In general low-voltage circuits, AC220V voltage is used, as it is easy to obtain power between the LN terminals. The control circuits are designed to remain operational; without power, control functions cease to work. However, in power systems or some DCS systems, DC220V is used to prevent failures in the power supply system, and a DC power supply can be used to provide the DC220V operating power.
There are many DC versions for high voltage, such as DC220V, 110V, and 24V, while there are many AC versions for low voltage, like AC220, AC110, and AC24. This is likely related to the control components used.