Testing The Cooling Of The Motor; Commissioning A Separately Driven Fan - Siemens SIMOTICS 1LE8 Operating Instructions Manual

Low-voltage motors shaft heights 80 ... 355

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Commissioning

7.1 Measures before commissioning

7.1.5

Testing the cooling of the motor

Check that the motor cooling is available for commissioning.

The separately driven fan ensures that the motor is cooled irrespective of the motor speed or

direction of rotation. The separately driven fan is only suitable for one direction of rotation.

Checks before the first test run

Before the first test run, carry out the following checks:

• The separately driven fan is correctly fitted and aligned.

• The rotor runs freely.

• All of the retaining elements and electrical connections are securely tightened.

• The grounding and equipotential bonding connections to the mains have been correctly

made.

• The air flow is not impeded or shut off by flaps, covers or similar.

• If the cooling air is in open circulation, it has only weak, chemically abrasive properties

and a low dust content.

• All protection measures have been taken to prevent accidental contact with moving or live

parts.

Performing the test run

1. Switch the separately driven fan motor on and off briefly.

2. Compare the direction of rotation of the separately driven fan with the specified direction of

rotation. The direction of rotation of the separately driven fan is indicated with an arrow on

the fan cover specifying the direction of rotation or with a terminal designation on the

rating plate of the separately driven fan.

Depending on the version, the fan impeller is visible through the air inlet opening in the

fan cover on the separately driven fan motor.

3. If the direction of rotation is wrong, then interchange two line cables in the separately

driven fan motor terminal box.

Note

Use these operating instructions for motors with separately driven fans.

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1LE8 轴高 80 ... 355

操作说明, 11/2022, A5E52373573A

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