Mitsubishi Electric FATEC FR-A800 Manual page 127

7
REVIEW OF INSTALLATION ENVIRONMENT
(8) When driving an explosion-proof motor with an inverter
An explosion-proof motor has an authorization system in combination with the driving inverters.
Check the following points for installing them.
(a) For the existing explosion-proof motor for commercial power supply drive and a safety
explosion-proof motor, the inverter operation is not available.
The motor must pass the explosion-proof test by Ministry of Health, Labor and Welfare in
combination with the inverter. The Technology Institution of Industrial Safety organizes the
test.
The combination of the explosion-proof motor and the inverter which has passed the test in
advance can be used. However, only the inverters which have the same model (including the
capacity) as the one passed the test can be used. Furthermore, operation range is limited
within the certified terms.
The inverter-driven dedicated explosion-proof type motor and inverter are prepared by
Mitsubishi. For the details, refer to the catalog.
(b) Take the test to use the rating out of the certified terms or model that has not been passed
the test.
(c) When using the inverter option together, refer to the Instruction Manual.
(d) Using a safety explosion-proof motor in combination with an inverter is not economical not
only because it costs the test fee but also the operation condition (such as reduction in
incurred loss and improvement of cooling effect) is strictly restricted.
It is recommended to use the explosion-proof motor which has been passed the test.
(e) The inverter itself is a non-explosion proof structure. Always install it in a non-explosion
location.
7.3 Problems and measures when using inverter
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