1 Device series DC1-S…
1.7 Selection Criteria
20 DC1-S…20…, DC1-S…OE1 Variable Frequency Drives 05/21 MN040058EN www.eaton.com
1.7 Selection Criteria
The variable frequency drive’s rated output current I
e
must be greater than or
equal to the rated motor current, while the motor’s and variable frequency
drive’s voltage must match the supply voltage U
LN
of the mains that is
providing power.
Figure 9: Selection criteria
When selecting the drive, the following criteria must be known:
• Mains voltage = rated operating voltage of the motor (e. g. 1~ 230 V),
• Motor type and characteristics (e.g., AC motor with run capacitor)
• Rated motor current
• Ambient conditions: ambient air temperature, control cabinet installation
with IP20 degree of protection or direct local installation with IP66
degree of protection.
Example based on figure 9
• Mains voltage: 1~ 230 V, 50 Hz
• Rated operational current: 5.1 A
• Control panel installation
→ IP20 degree of protection
• Ambient air temperature max. 50 °C without output reduction, IP20
￫ Variable frequency drive that should be selected: DC1-S27D0FN-A20CE1
• DC1-S2…: single-phase main terminal, rated operating voltage: 230 V
• DC1-…7D0…: 7 A – The variable frequency drive’s rated operational
current (output current) guarantees that the motor will be supplied with
the required rated operational current (5.1 A).
￫
The variable frequency drive needs to be selected on the basis
of the motor current first, not on the basis of the motor output
power in kW (kilowatts) or HP (horsepower).
The efficiency and output of single-phase AC motors in
particular will vary heavily among different models.
1370 rpm
1 AC 230 V
5.1 A
50 Hz
0.75 KW
cos ϕ 0.94
P-07
P-08
P-10
P-09
L1
/L
L2/N
L3
U
V
W
1
2
3
4
5
6
7
8
9
10
11
30 μF/450 V
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