Configuration
6.7 Changing the polarity of hoisting gear motors
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
Manual, 09/2017, A5E03656507120A/RS-AE/006
103
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.
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 performance range of 18.5 kW to
22 kW/400 V (utilization category AC-3) is covered by size S2, up to 37 kW by size S3. All 4-
pole 3RT25 contactors of sizes S00 to S3 are equipped with AC or DC solenoid systems.
The device footprints are the same for all operating mechanism types. In size S0, the
installation depth for contactors with a DC solenoid system is 10 mm larger than that for
versions with an AC solenoid system. In the case of sizes S2 and S3, all operating
mechanism types have the same installation depth.
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