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5 RAMO5 motor starter
5.2 Features
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Rapid Link 5 · RAMO5 · RASP5 05/20 MN034004EN www.eaton.com
5.2 Features
RAMO5 ( Ra pid Link mo tor control unit) is an electronic motor starter for
direct start-up of three-phase motors up to 6.6 A ( ≙ 3 kW at 400 V).
RAMO5 uses thyristors and relays for switching in the power circuit.
This makes it possible for the units to have a lifespan of more than 10 million
switching cycles.
RAMO5 is available in two versions with respect to the direction of rotation:
• RAMO5- D … = DOL starter for one direction of rotation
• RAMO- W … = Reversing starter for two directions of rotation (FWD, REV)
After run-up, the speed of the controlled motor is constant and is determined
by the frequency of the supply voltage (power bus, 50/60 Hz). The three-
phase motor protection allows protected operation of three-phase motors in
the range from 0.3 A (
≙ 90 W at 400 V) to 6.6 A ( ≙ 3 kW at 400 V).
This enables the so-called thermistor motor protection to be implemented in
conjunction with the integrated thermistor monitoring.
The built-in transistor switch allows actuation of spring-loaded brakes with
DC air solenoid valve. A controlled supply voltage of 180 V AC, 230 V AC or
400 V AC is output for the brake rectifier (
￫ Figure 64, page 107).
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DANGER
Open only in voltage-free state!