MotorsCVAB-NSingle-phase external rotor motors 230V 50Hz, IP55, class F, with thermal protection, speed controllable by tension.Working temperature from -40ºC to 60ºC.CVAT-NThree-phase 4 and 6 pole motors 230/400V 50Hz, IP55, class F, with thermal protection (PTC), speed controllable by inverter.Working temperature from -20ºC to 40ºC.On request, explosion proof versions in accordance to ATEX Directive, for three phase models.Working temperature from -20ºC to +40ºC. ATEX Flameproof - Gas: In standard ATEX version flameproof motors are without thermal protection. If used with frequency inverter,flameproof motors with a PTC-type thermal protection must be specified at order. II 2G Exd IIB T4 II 2G Exd IIB+H2 T4 (with motor Exd IIC T4) ATEX Increased safety - Gas: II 2G Exe IIC T3To select CVAT-N ATEX refer to performance curves, or Easyvent.Note electrical data may vary for ATEX motors.