Connecting The Fan; Figure 3-4 Detailed View Of Fan, ① Fan Unit Terminal Box - Siemens 1PH728 Operating Instructions Manual

Three-phase induction motor ac compact drives

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Transport, assembly, and connection

3.3 Electrical connection

3.3.4

Connecting the fan

Safety notes

Please observe the following safety instructions relating to connecting a fan:

CAUTION

Only operate the motor with fan

If the motor is operated without fan it will overheat because the heat that is generated

cannot be dissipated. Destruction of the motor is the consequence.

Provide a protective circuit that prevents the main motor from being switched on when the

fan unit is not in operation.

CAUTION

An external fan is only suitable for one direction of rotation

The separately-driven fan unit is only designed for one direction of rotation corresponding

to the direction of rotation arrow. Operation with the wrong direction of rotation can cause

overheating or destruction of the motor.

Ensure that the external fan is operated in the proper direction of rotation. The direction-of-

rotation arrow and the direction of movement of the fan impeller are indicated on the rear

side of the blower.

If necessary, switch the direction of rotation by swapping over two phase conductors in the

terminal box.

Connection

Connect the fan in the terminal box of the fan motor.

Figure 3-4

[ID: 337.02]

Detailed view of fan, ① fan unit terminal box

Siemens AG Operating Instructions 2.02 1PH728

A5E00177602A AD

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