A
The Australian Standard on intrinsic safety contains the following:
3.6.2 Restrictions on Safe Area Equipment
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If the equipment is mains-fed, it shall be fed through a suitably fused, double-wound transformer
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Does this mean that swictch mode power supplies cannot be used to supply an IS circuit? If so, what is the advantage safety-wise of a double-wound fused transformer as opposed to a fused switchmode power supply?
3.6.2 Restrictions on Safe Area Equipment
...
If the equipment is mains-fed, it shall be fed through a suitably fused, double-wound transformer
...
Does this mean that swictch mode power supplies cannot be used to supply an IS circuit? If so, what is the advantage safety-wise of a double-wound fused transformer as opposed to a fused switchmode power supply?