Technology / Motors / Externally Ventilated: A motor using an external cooling system. This is required in applications where the motor's own fan will not provide sufficient cooling: this is true for certain duty cycle applications, slow speed motors, also in environments with extreme dirt. Often a duct with an external blower is used to bring clean air into the motor's air-intake.
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Technology / Motors / Totally-Enclosed Pipe Ventilated Machine: A totally-enclosed machine except for openings so arranged that inlet and outlet ducts or pipes may be connected to them for the admission and discharge of ventilating air. Air may be circulated by me MORE
Technology / Motors / Totally- Enclosed Non-Ventilated Enclosure: Has no provisions for external cooling to the enclosing parts. The motor is cooled by heat radiation from the exterior surfaces to the surrounding atmosphere. MORE
Technology / Motors / Open Pipe-Ventilated Machine: An open machine except that openings for admission of ventilating air are so arranged that inlet ducts or pipes can be connected to them. Air may be circulated by means integral with machine or by mea MORE