Page 11 - Abb Motors
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Increased safety cast iron motors – 0.09 – 1000kW Dust-ignition-proof - 0.09 – 1000kW (Ex t, Zone 21
(Ex ec, Zone 2) and Zone 22)
Protection type Ex ec requirement options for use Protection type Ex t requirement options for use with
with an AC drive an AC drive
The motor is tested with the drive or a comparable The motor has been tested together with the drive for
drive. Or, the motor’s temperature class is determined this duty and with the protective device provided
by calculation.
Or, use direct temperature protection with
Note: if use with an AC drive, better to upgrade to a embedded temperature sensors and with a sufficient
ABB flameproof motor with an ABB drive. margin to protect the bearings or rotor. The action
of the protective device must cause the motor to be
1. No hot surfaces in rated conditions
disconnected.
2. No sparking during normal running or starting
1 No hot surfaces outside the enclosure in both rated
and fault conditions
2 Ingress protection class high enough to ensure
no dust can enter the motor
Precision & Reliability ABB Motors | 11
