Schaffner Group
User and Installation Manual
Ecosine FS42842
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23.5 EN 61000-3-12 current harmonic limits:
Conditions to use Table 4:
1. The phase angle of the 5th harmonic current related to the fundamental phase voltage is in the range
of 90° to 150°.
Note:
This condition is normally fulfilled by equipment with an uncontrolled rectifier bridge and
capacitive filter, including a 3% AC or 4% DC reactor.
2. The design of the equipment is such that the phase angle of the 5th harmonic current has no
preferential value over time and can take any value in the whole interval
(0°…360°).
Note:
This condition is normally fulfilled by converters with fully controlled thyristor bridges.
3. The 5th and 7th harmonic currents are each less than 5% of the reference fundamental current.
