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To avoid a fire hazard consider the implications of overheating in the
unlikely event of a fault in the PP600. The power dissipation in a fault
condition is approximately given by the sum of the following for
the two channels:
(<Power supply voltage> - <rated voltage for lighting>) * <max current delivered by Power supply>
Either limit the power supply output current(s) so that not more than 30W can
be dissipated in the PP600, or mount the unit in an enclosure.
To limit the power, set the power supply output voltages to the minimum value
required by the LED light and the PP600 together. Chose a PSU that limits its
output current by design, by setting the current limit on the supply (if this
feature exists) or use fuses. Remember to derate the fuse, if mounted in an
enclosure, as the temperature will be higher than ambient.
An enclosure may also be required for other parts of the system such as power
supplies and will provide mechanical and environmental protection in
industrial applications.
If an enclosure is used, the enclosure should be metal or plastic (with a
flammability rating of UL94 V1 or better); with no holes below or to the sides
of the PP600 when mounted. Cable entries below the PP600 should be via
glands that have a flammability rating as before. Observe the specified gap
between the PP600 and any other part or side of the enclosure.
