PSU Series User Manual
30
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
Reverse Current:
Regenerative load
When the power supply is connected to a
regenerative load such as a transformer or
inverter, reverse current will feed back to the
power supply. The PSU power supply cannot
absorb reverse current. For loads that create
reverse current, connect a resistor in parallel to the
power supply to bypass the reverse current. This
description only applies when the bleed resistance
is off.
PSU Load
Resistor
Reverse current
The current output will decrease by the amount of
current absorbed by the resistor.
Ensure the resistor used can withstand the power
capacity of the power supply/load.
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