National Motors® totally enclosed fan cooled squirrel-cage induction motors are designed and manufactured to meet or exceed the latest IEC standards.
These motors have high efficiency, superior speed-torque and excellent electrical characteristics. These multi-purpose motors are the ideal choice for installation in arduous environmental conditions.
This range offers a variety of induction motors with a power rating of 0.75 KW to high powered motor providing 315 kW. These motors are highly engineered to cope up with sudden load increase, longer thermal life, higher altitudes and voltage variations. All the motors are manufactured under strict quality control procedures (ISO9001) and are fully tested against the applicable standard.
All the motors have IP55 degree of protection. The cooling fan is protected by a cover with a degree of protection IP 2x.
These motors are having Class F insulation. Class F allows a maximum temperature of 155 at the hot spots in the machine. The impregnation of windings is made with thermo-hardening hot paints made of polyester resins which protect effectively against damp and they have a great resistance to warmth.
Motors with Class B and Class H insulation are also available as per request.
Standard motors are wound for delta voltage of 380-415V with frequency of 50Hz or 220-240, 380-460V at 60Hz.
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