UL 244A-2003《设备的固体控制器》

1.1 These requirements cover component electronic controls intended to be factory installed on or in
appliances and other utilization equipment rated 600 V or less, used in ordinary dry locations as defined
in the National Electrical Code, NFPA 70, and that comply with the requirements for such appliances and
equipment.
1.2 For a control covered by this standard, it is assumed that:
a) No voltage greater than 600 V above ground will be present in a control,
b) An isolation transformer, if provided, will generally furnish power at a lower potential than the primary voltage, and
c) The output of the control will not be located in a circuit operating at greater than 600 V
above ground in the end-use product.
If conditions other than these are provided, consideration shall be given to the need for additional requirements.