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Mitsubishi Electric FR-E720-0.1K(SC) Instruction Manual Page 18

Fr-e700 series.
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(3)
Dust, dirt, oil mist
Dust and dirt will cause such faults as poor contact of contact points, reduced insulation or reduced cooling effect due to
moisture absorption of accumulated dust and dirt, and in-panel temperature rise due to clogged filter. In the atmosphere
where conductive powder floats, dust and dirt will cause such faults as malfunction, deteriorated insulation and short circuit in
a short time.
Since oil mist will cause similar conditions, it is necessary to take adequate measures.
Countermeasures
Place in a totally enclosed enclosure.
Take measures if the in-enclosure temperature rises. (Refer to page 10)
Purge air.
Pump clean air from outside to make the in-panel pressure higher than the outside-air pressure.
(4)
Corrosive gas, salt damage
If the inverter is exposed to corrosive gas or to salt near a beach, the printed board patterns and parts will corrode or the
relays and switches will result in poor contact.
In such places, take the measures given in Section 3.
(5)
Explosive, flammable gases
As the inverter is non-explosion proof, it must be contained in an explosion proof enclosure. In places where explosion may be
caused by explosive gas, dust or dirt, an enclosure cannot be used unless it structurally complies with the guidelines and has
passed the specified tests. This makes the enclosure itself expensive (including the test charges). The best way is to avoid
installation in such places and install the inverter in a non-hazardous place.
(6)
Highland
Use the inverter at the altitude of within 1000m. If it is used at a higher place, it is likely that thin air will reduce the cooling
effect and low air pressure will deteriorate dielectric strength.
(7)
Vibration, impact
The vibration resistance of the inverter is up to 5.9m/s
Z axes. Vibration or impact, if less than the specified value, applied for a long time may make the mechanism loose or cause
poor contact to the connectors.
Especially when impact is imposed repeatedly, caution must be taken as the part pins are likely to break.
Countermeasures
Provide the panel with rubber vibration isolators.
Strengthen the structure to prevent the panel from resonance.
Install the panel away from sources of vibration.
Installation of the inverter and enclosure design
2
at 10 to 55Hz frequency and 1mm amplitude for the directions of X, Y,
1
9

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