Eaton Rapid Link RAMO5, Manual

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2 Engineering
2.4 Electrical power network
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Rapid Link 5 · RAMO5 · RASP5 10/19 MN034004EN www.eaton.com
2.4 Electrical power network
2.4.1 Mains connection and configuration
The Rapid Link modules RAMO5 and RASP5 can be connected and operated
with all control-point grounded AC power networks (see IEC 60364 for more
information in this regard).
Figure 16: AC power networks with grounded center point (TN-/TT networks)
The connection and operation of frequency inverters to asymmetrically
grounded TN networks (phase-grounded Delta network “Grounded Delta”,
USA) or non-grounded or high-resistance grounded (over 30
Ω ) IT networks is
not permissible.
.
2.4.2 Mains voltage and frequency
The standardized rated operating voltages (IEC 60038, VDE017-1) for power
suppliers (EVU) guarantee the following conditions at the transition points:
• 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 voltage value below also allows for the permitted voltage drop of 4 % in
the consumer circuits, i.e. a total of U
LN
- 14 %:
400 V - 15 % - 400 V + 10 % (380 V - 10 % - 480 V + 10 %)
(340 V - 0 % - 440 V + 0 %) (342 V - 520 V)
The permissible frequency range for all voltage categories is 50/60 Hz
(45 Hz-0 % - 66 Hz+0 %).
￫
Measures for electromagnetic compatibility are mandatory in a
power drive system, to meet the legal standards for EMC- and
Low Voltage Directive.
Good grounding measures are a prerequisite for the effective
use of further measures, such as a screenground kit or filters.
Without respective grounding measures, further steps are
superfluous.
L2
N
L1
L3
PE
L2
PEN
L1
L3