Eaton PowerXL DC1, Руководство по установке

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2 Engineering
2.2 Electrical power network
38
DC1 Variable Frequency Drive 04/16 MN04020003Z-EN www.eaton.com
2.2.2 Mains voltage and frequency
The standardized rated operating voltages (IEC 60038, VDE 017-1) of power
utilities guarantee the following conditions at the connection point:
• Deviation from the rated value of voltage: maximum ±10 %
•
Deviation in voltage phase balance: maximum ±3 %
• Deviation from rated value of the frequency: maximum ±4 %
The broad tolerance band of the DC1 variable frequency drive considers the
rated value for European as (EU: U
LN
= 230 V/400 V, 50 Hz) and American as
(USA: U
LN
= 240 V/480 V, 60 Hz) standard voltages:
•
115 V, 50 Hz (EU) and 115 V, 60 Hz (USA) for DC1-1D…,
110 V -10 % - 115 V +10 % (99 V -0% - 126 V +0 %)
The internal voltage doubler will increase the mains voltage of 115 V to
produce an output voltage of 230 V (motor voltage).
•
230 V, 50 Hz (EU) and 240 V, 60 Hz (USA) at DC1-12…, DC1-32…
200 V -10 % - 240 V +10 % (180 V -0 % - 264 V +0 %)
•
400 V, 50 Hz (EU) and 480 V, 60 Hz (USA) at DC1-34…
380 V -10 % - 480 V +10 % (342 V -0 % - 528 V +0 %)
The permissible frequency range for all voltage categories is 50/60 Hz
(48 Hz - 0 % - 62 Hz + 0 %).
2.2.3 Voltage balance
Unbalanced voltages and deviations from the ideal voltage shape may occur
in three-phase AC supply systems if the conductors are loaded unevenly and
if large output loads are connected directly. These supply voltage unbalances
may cause the diodes in the variable frequency drive’s rectifier bridge
converter to be loaded unevenly, resulting in premature diode failure.
￫
In the project planning for the connection of three-phase
supplied variable frequency drives (DC1-3…), consider only AC
supply systems that handle permitted asymmetric divergences
in the mains voltage +3 %.
If this condition is not fulfilled, or symmetry at the connection
location is not known, the use of an assigned main choke is
recommended.
￫
For the rated mains contactors for DC1 variable frequency
drives, please refer to
￫
Section 2.5, “Mains chokes“,
page 42.