Mitsubishi Electric FR-D720S SC EC Instruction Manual page 33

Installation
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.
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 pres-
sure will deteriorate dielectric strength.
Maximum 1000m above sea level for standard operation. After that derate by 3% for every extra
500m up to 2500m (91%).
Vibration, impact
The vibration resistance of the inverter is up to 5.9m/s
plitude for the directions of X, Y, Z axes.
Vibration or impact, if less than the specified value, applied for a long time may make the mech-
anism loose or cause poor contact to the connectors. Especially when impact is imposed re-
peatedly, caution must be taken as the part pins are likely to break.
● Countermeasures
– Provide the enclosure with rubber vibration isolators.
– Strengthen the structure to prevent the enclosure from resonance.
– Install the enclosure away from sources of vibration.
FR-D700 SC EC
Enclosure design
2
at 10 to 55Hz frequency and 1mm am-
2 - 9