4 Operational
4.6 Help cards
DC1…20… and DC1…OE1 Variable Frequency Drives 02/20 MN040059EN www.eaton.com 135
When the DC1 variable frequency drive is used with its default settings,
parameter P-08 will show the drive’s rated operational current. The motor
protection function can be adjusted to match the motor being used by
changing this value to the rated motor current. If the motor current exceeds
the value set in P-08, the dots on the display (I x t) will flash to indicate that
there is an overload. If this overload is present for a prolonged period of time,
the DC1 variable frequency drive will switch off the output in order to protect
the motor, and the display will show I.t-trP in order to indicate this.
At this point, the motor will coast to a stop.
The computed value for the thermal motor model may be saved depending
on how parameter P-51 has been configured.
Table 29: Thermal memory (T-Memory Enable)
Example of a motor rating plate
DC1-3402D3… variable frequency drive (rated operational current of 2.3 A)
for three-phase mains connection with a voltage of 400 V.
Figure 78:Motor rating plate, P-08 = 1.9 A at 400 V
P-51
Storage function Description
0 OFF The computed thermal model for the motor will be deleted when the
supply voltage is switched off (= default setting).
1
ON The computed thermal model for the motor will be automatically saved
when the supply voltage is switched off and used again when the supply
voltage is switched back on.
￫
This motor needs to be connected with a star configuration.
1410 min
230/400 V 3.2/1.9 A
50 Hz
-1
0.75 kW
cos ϕ 0.79
P-07
P-08
P-10
P-09
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