Power supply issues in explosion-proof areas
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If a device can be powered by both 24 volts and 220 volts, which power source is better to use in an explosion-proof area? Why?
Reply to 1# 383919796: 24V is safe, but our flow meters use 220V AC to ensure the proper voltage.
I think either one will work; 24V DC is preferable!
Owners generally require the use of 24VDC, as it is safe to touch with bare hands without any issues. From a design perspective, 220VAC is more convenient (personal opinion), as there is no need to consider cable length calculations resulting from voltage reduction. For explosion protection, as long as it meets the requirements of the area in question, it is sufficient.
It depends on the explosion-proof specifications of the instrument. Since there are two options for the power supply, the instrument’s application for explosion-proof certification must also include additional requirements regarding the power supply. If a 220VAC power supply is an option, its explosion protection certification will definitely not be intrinsically safe; it can only be flameproof or purged. If a 24VDC power supply is chosen, it can be intrinsically safe or adopt other explosion-proof forms. Additionally, it is necessary to consider the level of the explosion-proof zone at the actual site; if it is Zone 0, only intrinsically safe instruments powered by 24VDC or pneumatic instruments can be used.
OP, technically, as long as 220ACV or 24DCV meets the explosion-proof requirements and power supply specifications, it will do. However, in engineering installation design, voltage sources below 36V are generally chosen to ensure safety.
A 24-volt voltage is better; the lower the voltage, the less likely sparks will occur, making it safer~~~
In terms of safety, it definitely supports 24V```
Conventionally, 220V AC or 24V DC is used; either option will meet the explosion-proof requirements as well as the power supply specifications. However, if the device requires a high current, 220V AC is a better choice; for instruments and small solenoid valves, 24V DC is suitable
Wherever possible to meet the requirements of on-site instruments, a 24VDC power supply is still the preferred choice.