Selection of power cables for instrument valves at different voltage levels
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I would like to ask: generally, solenoid valves operate at 24VDC or 220VDC, while instruments use 220VAC power. Valves can be powered by either 220VAC or 380VAC; for valves powered by 220VAC or 380VAC, YJV cables are usually chosen. This type of cable is selected regardless of the power level. As for the power supply for solenoid valves and instruments, I’m a bit unsure about what to use. In the past, control cables were used directly, with both shielded and unshielded versions being employed in designs. However, the current-carrying capacity of control cables isn’t clearly specified, and indeed, control cables are meant for control circuits. I’d like to know how others make their choices. For the power supply of 220VAC switch valves, should a three-core cable be used, with one core for switching control and the other two for power, and is it more appropriate to use a control cable or a power cable in this case?
For valves operating at 220VAC and 380VAC, it is appropriate to use YJV-type power cables, as these cables possess excellent insulation properties and voltage resistance, making them suitable for high-voltage applications. For 24VDC and 220VDC solenoids as well as instrument power supplies, shielded or unshielded control cables can be used. Although it is not easy to determine the current-carrying capacity of control cables, they are designed primarily for low-voltage and signal transmission, and they are sufficient for use in control circuits. For general industrial applications, if the power requirements of solenoids and instruments are not particularly high, control cables are usually sufficient to meet the needs. For the power supply and control of 220VAC switch valves, a three-core control cable is a common choice; if higher environmental requirements exist (such as the need for interference resistance), a shielded control cable would be more appropriate. In general, depending on the voltage level and application, selecting the appropriate cable type is key to ensuring the safe and stable operation of the system. .
Thank you, thank you! You explained it in great detail