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Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
6
Use
Duty Types and Limit Values
6.2 Use
6.2.1 Motors of category 2G and 2GD
The necessary information for this is listed on the nameplate.
NOTES ON EXPLOSION PROTECTION
• It is not permitted to connect more than one motor to one frequency inverter.
• The voltage at the motor terminal board must projected be to prevent overheating.
• If the motor voltage is too low (undercompensation), slip increases, which causes
higher temperatures in the rotor of the motor.
• If the mechanical load is the same, operation on a frequency inverter causes a
more significant motor temperature rise due to the harmonic content in current and
voltage.
NOTES ON EXPLOSION PROTECTION
• The frequency inverter can only be operated with motors that are permitted for this
operating mode according to the EC prototype test certificate.
• Verification that the motor voltage matches the specifications of the EC prototype
test certificate must be provided during startup.
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