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AMD5x Passive Infeed Unit and AMD5x Servo Drive - User Guide
ANCA MOTION
D-000129 Rev 09
66
Harmonics and Reactive Power Compensated Supplies
5.5.1
The PIU input diode bridge is a non-linear load to the mains supply and generates low frequency conducted
harmonic effects in the frequency range up to 9 kHz. The non-linear currents cause non-sinusoidal voltage drops
across the internal resistance of the mains supply transformer and therefore distort the voltage at the point of
common coupling (PCC). This may affect other equipment connected at the PCC, especially if multiple drives are
connected from same supply. Calculation of exact harmonics and voltage distortion is site specific, but the
harmonics can be reduced to acceptable levels defined by EN 61000-3-12 with the addition of an Line Reactor
(inductor) as specified by
Table 24: Recommended EMC components for a 380-480V L-L 3
See
also
10.8.2.3 European Low Voltage Directive EN 61000-3-12
Warning!
A Line Reactor is required to allow proper function of the PIU, and to limit conducted harmonics on the
mains supply. Under no circumstances attempt to operate the PIU without a line reactor fitted.
In mains supply installations equipped with reactive power compensation capacitors, the harmonic currents
drawn by the PIU may cause resonances excited by the harmonic currents being drawn. Therefore, it is strongly
recommended that any power compensation capacitor equipment be fitted with suitable reactor protection and
damping to prevent harmonic resonances.
3 Phase Supply System Wiring
5.5.2
shows the recommended EMC components for wiring of a 3 phase supply system. An EMI filter and a
3 phase line reactor (inductor) are installed on the input power side.
Circuit
Breaker
or Fuses
Isolation
Switch
EMI Filter
X2
P.E.
P.E.
Line Inductor
P.E.
Chass is
AMD5x PIU
1
2
3
4
Emergency Stop
Con tactors
Figure 5-6: EMC components installation for a 3 phase supply
Table 24: Recommended EMC components for a 380-480V L-L 3 Phase supply
PIU Power Rating
3 Phase EMI Filter
Line Reactor
15kW
Schaffner
FN3258-30-33 (30A)
or FN258-30-33 (30A)
Schaffner RWK 3044-30-92 (1mH 30A )
or MTE RLW-002805 (1.3mH 28A)
or TDK B86305L0030R000 (1mH 30A)
or BLOCK LR3 40-4/30 (1mH 30A)
24kW
Schaffner
FN3258-42-33 (42A)
or FN258-42-33 (42A)
Schaffner RWK 3044-48-92 (0.61mH 48A)
or MTE RLW-004603 (0.55mH 46A)
or TDK B86305L0046R000 (0.64mH 46A)
or BLOCK LR3 40-4/45 (0.65mH 45A)