4. Advanced Operation
PROGRAMMABLE AC/DC POWER SOURCE
64
4.1.2 Using RMS Current Limiter
Effective value of output current is limited by the RMS current limiter. While the limiter is working,
icon
is displayed and LIMIT LED illuminates.
Setting values of RMS current limiter are variable, and kept independently for each of 100 V and
200 V ranges.
You can choose whether to make the output off or not upon the triggering of the RMS current
limiter. If you choose to set the output off, specify the continuous operation time of limiter until the
output off becomes effective. Whether output off is set or not and the time setting are common
regardless of the output ranges.
For the default setting range, see
10.13
.
--------
Notes
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It will take time from the limiter starts operation until the output current is restricted enough,
because the RMS current limiter needs to calculate effective value. Use the peak current
limiter to limit the current quickly. For peak current limiter, see
4.1.1
.
RMS current limiter may not be able to limit output current sufficiently if the load impedance
is very small (e.g. output short circuit). Also, RMS current protection may work in this case
and then output is turned off.
When the number of units is increased or decreased based on the power unit energization
setting, the setting is reset to the factory default setting corresponding to the capacity.
In the polyphase system, the setting of the RMS current limiter is common to all phases.
If the output off after the continuous operation of the limiter for the specified duration is
enabled, the setting of output-off phase is ignored.
-----------------------------------------------------------------------------------------------------------------------------
Operation procedure
1.
Push [Limiter] soft-key to select 2:Irms Limiter (or push I key). Opens the RMS current limiter
set window.
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