0 About this manual
0.4 Mains supply voltages
DC1 Frequency Inverter 10/12 MN04020003Z-EN www.eaton.com 7
0.4 Mains supply voltages
The rated operating voltages stated in the following table are based on the
standard values for networks with a grounded star point.
In ring networks (as found in Europe) the rated operating voltage at the trans-
fer point of the power supply companies is the same as the value in the con-
sumer networks (e.g. 230 V, 400 V).
In star networks (as found in North America), the rated operating voltage at
the transfer point of the utility companies is higher than in the consumer net-
work.
Example: 120 V 115 V, 240 V 230 V, 480 V 460 V.
The DC1 frequency inverter's wide tolerance range takes into account a per-
missible voltage drop of 10% (i.e. U
LN
- 10%) while, in the 400-V category,
it takes into account the
North American
mains voltage of
480 V + 10 %
(60 Hz).
The permissible connection voltages for the DC1 series are listed in the
Technical Specifications section in the appendix.
The rated mains voltage operational data is always based on mains frequen-
cies of 50/60 Hz within a range of 48 to 62 Hz.
0.5 Units
Every physical dimension included in this manual uses international metric
system units, otherwise known as SI (Système International d’Unités) units.
For the purpose of the equipment's UL certification, some of these dimen-
sions are accompanied by their equivalents in imperial units.
Table 1: Unit conversion examples
designation
US-American value SI value Conversion value US-American
designation
Length 1 in (’’) 25.4 mm 0.0394 inch
Power
1HP=1.014PS 0.7457 kW 1.341 horsepower
Torque
1 lbf in 0.113 Nm 8.851 pound-force inches
Temperature 1°F (T
F
) -17.222 °C (T
C
) T
F
=T
C
×9/5+32 Fahrenheit
Speed
1rpm 1min
-1
1 Revolutions per minute
Weight 1lb 0.4536 kg 2.205 pound
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