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Countermeasure against harmonics
I am considering to use four FR-F540-15K units to control the pump speed.
What should I do with to suppress harmonics?
The four units are the total load.
What should I do with to suppress harmonics?
The four units are the total load.
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Answer
The following countermeasure against harmonics is available with the inverter.
The values are quoted from the harmonic suppression guidelines.
1. Insert the AC reactor (FR-BAL).
Effect: 5th harmonics 38%, 7th harmonics 14.5%
2. Insert the DC reactor (FR-BEL). Some of the old inverter types do not support this reactor.
Effect: 5th harmonics 30%, 7th harmonics 13%
3. Install the high power factor converter (FR-HC).
Effect: 5th harmonics 0%, 7th harmonics 0% (harmonics current = 0%)
The harmonic suppression guidelines defines the upper limit value of the harmonics current depending on the contract demand. Take a measure so that this upper limit value is not exceeded.
The values are quoted from the harmonic suppression guidelines.
1. Insert the AC reactor (FR-BAL).
Effect: 5th harmonics 38%, 7th harmonics 14.5%
2. Insert the DC reactor (FR-BEL). Some of the old inverter types do not support this reactor.
Effect: 5th harmonics 30%, 7th harmonics 13%
3. Install the high power factor converter (FR-HC).
Effect: 5th harmonics 0%, 7th harmonics 0% (harmonics current = 0%)
The harmonic suppression guidelines defines the upper limit value of the harmonics current depending on the contract demand. Take a measure so that this upper limit value is not exceeded.
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- Inverter, magnet motor drive
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