NF EC1000SA, Instruction Manual

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3.4 Main Operation Example
EC1000SA 3-28
3.4.7 Using limiter functions
a) Using current limiter
The EC1000SA includes a peak current limiter function and a RMS current limiter function.
Limiter settings are retained separately for 100 V and 200 V ranges.
Setting range limits can be set for output voltage and output frequency.
See “5.3.7 Peak current limiter settings” .
See “5.3.8 RMS current limiter settings” .
Table3-12. Current Limiter Setting Ranges
Setting Setting Range Resolution Initial Value
Peak current
limiter (positive)
100 V range +10.0 A to +42.0 A 0.1 A +42.0 A
200 V range +5.0 A to +21.0 A 0.1 A +21.0 A
Peak current
limiter (negative)
100 V range
−
42.0 A to
−
10.0 A 0.1 A
−
42.0 A
200 V range
−
21.0 A to
−
5.0 A
0.1 A
−
21.0 A
RMS current
limiter
100 V range 1.0 A to 10.5 A 0.1 A 10.5 A
200 V range 1.0 A to 5.3 A 0.1 A 5.3 A
For a capacitive load or inductive load, the peak current limiter may not achieve the peak current
value as set, due to overshooting or undershooting the set current value, or variable output current
waveforms while the limiter is operating.
For an inductive load, operation of the limiter can cause the current to vary and, as a result, an output
overvoltage may occur.
Note with caution that the peak current limiter may allow overshooting, depending on the load, and
therefore may not achieve the peak current value as set.
For an inductive load, operation of the limiter can cause an output overvoltage, triggering the
overvoltage protection function. In this case, the peak current limiter settings (positive and
negative) should be reduced.
If the output current or frequency suddenly increases, due to an output short, etc., the limiter
response may not be quick enough, so the output overcurrent protection function may be triggered.
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CAUTION
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CAUTION