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2 Engineering
2.4 Electrical power network
Rapid Link 5 · RAMO5 · RASP5 05/20 MN034004EN www.eaton.com
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2.4 Electrical power network
2.4.1 Mains connection and configuration
The RAMO5 and RASP5 Rapid Link modules can be connected and operated
with all neutral-earthing AC power networks (see IEC 60364 for more infor-
mation in this regard).
Figure 16: AC power networks with earthed center point (TN-/TT networks)
It is not permitted to connect or operate frequency inverters in asymmetri-
cally grounded TN networks (phase-grounded Delta network, grounded
Delta, USA), non-grounded networks, or high-resistance grounded
(over 30
Ω ) IT networks.
.
2.4.2 Mains voltage and frequency
The standardized rated operating voltages (IEC 60038, VDE017-1) of utility
companies guarantee the following conditions at the transition points:
• Deviation from the rated voltage value:
±10 % or less
• Deviation in the voltage balance:
±3 % or less
• Deviation from the rated frequency value:
±4 % or less
The lower voltage value also makes allowance for the permitted voltage drop
of 4 % in consumer networks, 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 permitted frequency range in all voltage ranges is 50/60 Hz here
(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 earthing measures are a prerequisite for the effective use
of further measures such as screen earth kit or filters here.
Without respective grounding measures, further steps are
superfluous.
L2
N
L1
L3
PE
L2
PEN
L1
L3