E-34 | WG20 Geared Motors
18. Optional motor devices
18.1. Anti-condensation heating
18.2. Drain
18.3. Forced cooling
Brake, encoder, temperature controller, anti-condensation heating, forced ventilation, etc. are present only on special order.
Additional devices are to be connected according to the valid wiring diagrams.
Under certain climatic conditions, an anti-condensation heater may be required e. g. when there are great uctuations in
temperature or the motor is at rest in a humid atmosphere. For heater connection, see the motor terminal box.
Before energizing the motor, always make sure that the (optional) anti-condensation heating is switched off.
If motors are subject to great uctuations in temperature or extreme climatic conditions, humid air can condense inside the
machine. We recommend using a drain.
■ Open the drain depending on the environment and operating conditions. Afterwards, close the drain plug.
■ Before installing motors with drain, check that the mounting position is correct!
Figure 13: Detail of the drain plug position on drive endshield
■ The forced cooling must be connected according to the wiring diagram below (see also in forced cooling
terminal box).
■ If the motor is operated with a frequency inverter, it´s not allowed to connect the forced cooling to the frequen-
cy inverter. Connect the forced cooling to an EXTERNAL power supply.
IEC frame size Phases / Connection
Voltage range [V]
50 Hz 60 Hz
63 - 180
3~ / Star 346 - 525 380 - 575
3~ / Delta 200 - 303 220 - 332
1~ / Delta Steinmetz 230 - 277 230 - 277
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