SIRIUS 3RT2 contactors/contactor assemblies
2.4 Configuration
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
125
2.4.6 Changing the polarity of hoisting gear motors
Applications
The 4-pole 3RT25 contactors (2 NO contacts and 2 NC contacts) can be used for changing
the polarity of hoisting gear motors.
Note
The individual device for pole changing is not suitable for reversing operation.
Versions
The entire performance range of 3 to 11 kW/400 V (utilization category AC-3) is covered by
two sizes, S00 and S0, each with a width of 45 mm. The contactors of sizes S00 and S0 are
equipped with AC or DC magnet systems.
Rated powers
A single size covers several versions with different standard motor ratings. The specified
power (in kW) refers to the power output at the motor shaft (in accordance with the
nameplate). The performance range of the 3RT25 4-pole power contactors in size S00
extends up to 5.5 kW at a voltage of 400 V. In size S0, the maximum power value is 11 kW
at a voltage of 400 V. All specified rated powers and rated currents refer to an ambient
temperature of 60 °C.
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