Chapter 2: SAFETY
Operating Manual FU3AM-03
Page 9 of 30
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In the event of contaminated cooling air (dust, fluff, aggressive gases and grease), which
might adversely affect the functioning of the frequency inverter, adequate counter-
measures must be taken, e.g. separate air feed, installation of filters, regular cleaning,
etc.
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The units are designed for mounting in suitable card racks .
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The unit must be mounted vertically.
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Ensure unimpeded access of cooling air and egress of discharged air. Clearances for
incoming and outgoing air must be complied with.
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If the frequency inverter is continuously exposed to oscillation or vibration, vibration ab-
sorbers may be required.
2.7 Electrical Installation
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The regulator contains components sensitive to electrostatics. Before installation and
service work in the terminal clamp area, the staff must free itself of electrostatic electricity.
The discharging can be achieved by touching a grounded metal surface beforehand.
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To protect the power supply cables, the recommended cable protection fuse is required
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The motor should be equipped with a temperature sensor . Evaluation can be performed
by the FU3AE-04 or a suitable analyser.
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Control wiring and power cables must always be spatially separated from each other.
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Set-value inputs must be shielded.
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Conductor diameters for power supply and motor wiring must be at least 1,5 mm²!
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Observe the current local safety regulations.
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Use 60/75°C copper wire only
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Tightening torque for field wiring terminals
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Use in a pollution degree 2 environment
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“Use Class 1 wire only” or equivalent
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”Suitable for use on a circuit capable of delivering not more than 5kA rms symmetrical
amperes” for a max. voltage of 480 V.
Motor over temperature sensing according UL 508C is not provided by the drive or
equivalent.
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