Schaffner Group
User and Installation Manual
Ecosine FS42842
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Filter selection
ecosine
®
harmonic filters need to be carefully selected to get maximum benefits.
Step 1: supply frequency
Determine, whether the system in question will be operated in a 50Hz or 60Hz electricity grid, and select
the corresponding filter family according to the following table:
50Hz grid
Europe, Middle East, parts of Asia, parts of South America
FS42842
60Hz grid
North and Central America, parts of Asia, parts of South America
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Note:
a 50Hz filter will not provide satisfying harmonics mitigation in a 60Hz grid, and vice versa.
Step 2: supply voltage and configuration
Verify, that the supply voltage and configuration is suitable for standard ecosine
®
harmonic filters according
to the following table:
50Hz grid
Nominal voltage 380-500VAC ±10%
TN, TT, IT configuration
Step 3: real rectifier/drive input power
The individual filter must be selected by the actual rectifier/drive input real power (kW, HP). It is important
to select the filter as close as possible to the effective input power of the rectifier/drive.
Note that FS42842 (50Hz) filters show double ratings in the selection table. Depending upon the grid
voltage, the same filter is rated for two different rectifier/drive input real power values. For 380/400/415V
lines, the filters have a lower power rating than for 500V systems.
Note that if the rectifier/drive is being operated very close to its rated power, then the filter can be selected
by the motor drive’s nominal power rating. However, if the drive will be operated e.g. at only 66% of its
rated power, then a smaller filter should be selected in order to get maximum harmonics mitigation
performance and the optimum in terms of filter cost, size, and weight.
Please refer to the following examples:
Example 1:
Power line rating: 400V, 50Hz
Drive rating: 380-500V, 50-60Hz, 15kW, 22.5A, diode rectifier Planned
rectifier/drive input real power: 15kW (100% of drive rating)
Recommended filter according to the filter selection table FS42842: Type FS42842-32-33
Example 2:
Power line rating: 500V, 50Hz
Drive rating: 380-500V, 50-60Hz, 15kW, 22.5A, diode rectifier Planned
rectifier/drive input real power: 15kW (100% of drive rating)
Recommended filter according to the filter selection table FS42842: Type FS42842-24-33
Example 3:
Power line rating: 400V, 50Hz
Drive rating: 380-500V, 50-60Hz, 15kW, 22.5A, diode rectifier
Planned rectifier/drive input real power: 10kW (66% of drive rating)
Recommended filter according to the filter selection table FS42842: Type FS42842-24-33
