Eaton Rapid Link RAMO5, Manual

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2 Engineering
2.12 Motor and Application
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Rapid Link 5 · RAMO5 · RASP5 10/19 MN034004EN www.eaton.com
2.12 Motor and Application
2.12.1 Motor selection
General recommendations for motor selection:
• RAMO5 and RASP three-phase AC motors with squirrel-cage rotor and
surface-cooling can be basically connected to the output of the rapid link
modules; the output is also suitable for three-phase asynchronous
motors or standard motors. Other motor types, such as external-rotor
motors, slip-ring motors, reluctance motors, or synchronous or servo
motors can also be connected provided their electrical and connection
characteristics are the same as those of asynchronous motors and their
manufacturer has approved them for the application.
• Only motors with at least temperature class F (155 °C max. steady state
temperature) should be connected to the frequency-controlled RASP5.
• Choose 4-pole motors where possible (with synchronous speeds of:
1500 min
-1
at 50 Hz or 1800 min
-1
at 60 Hz).
• Operating conditions for S1 operation according to IEC 60034-1.
• The rated operational current of motor and RAMO5 or RASP5 should be
the same (avoid overdimensioning the motor!).
2.12.2 Motor and circuit type
The motor’s stator winding can be connected in a star or delta circuit as per
the rated operational data on the rating plate.
Figure 28: Example of a motor ratings plate
Figure 29: Configuration types:
Star-connected circuit (left), delta circuit (right)
A three-phase motor with the rating plate shown in Figure 28 can only be run
on the RAMO5 (U
LN
= 400 V) in a star connection.
The rated operational current of the motor with 2 A at 400 V requires a
Rapid Link module (RAMO5 or RASP5) with a rated operational current of at
least 2 A.
/ 400 V 230
3.5 / 2
0,75 S1 0.79 φ cos
kW
rpm 1430 50 Hz
A
U1 V1 W1
W2 U2 V2
U1 V1 W1
W2 U2 V2