Page 34 - PHU_User Manual_EN_Rev A
P. 34
PHU Series User Manual
Power limit Power limit. This alarm function is activated when
a power limit is detected.
Considerations
The following situations should be taken into consideration when
using the power supply.
Inrush current When the power supply switch is first turned on,
an inrush current is generated. Ensure there is
enough power available for the power supply
when first turned on, especially if a number of
units are turned on at the same time.
Pulsed or Peaked When the load has current peaks or is pulsed, it is
loads possible for the maximum current to exceed the
mean current value. The PHU power supply
ammeter only indicates mean current values,
which means for pulsed current loads, the actual
current can exceed the indicated value. For pulsed
loads, the current limit must be increased, or a
power supply with a greater capacity must be
chosen. As shown below, a pulsed load may
exceed the current limit and the indicated current
on the power supply ammeter.
Current limit
level
Measured
Ammeter
current
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