Totally Enclosed Fan Cooled Motor

National Motors’ NM Series consists of motors designed for fire pump applications as specified in NFPA 20 (Standard for the Installation of Stationary Pumps for Fire Protection). They are designed as per the requirements of NEMA MG-1 standard Design B. Totally Enclosed Fan Cooled Enclosures provide better protection from the outside environment including dust, airborne contaminants, and many other weather disturbances. The enclosed casing of TEFC motor seals the inner windings, contacts, and bearings from external sources such as dust and grit.

National Motor’s also offers totally enclosed fan cooled squirrel-cage induction motors that are designed and manufactured to meet or exceed the latest IEC standards where UL certification are not mandatory. This range offers a variety of induction motors with a power rating of 0.75 kW to high powered motor providing 315 kW.

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Features
  • NEMA Energy efficient design
  • Performance As per NFPA 20
  • 3 Phase
  • 15 Service Factor
  • Locked rotor ratings are as per NFPA 20 recommendations.
  • Rolled Steel & Cast Iron construction frame.
  • Rated Ambient Temperature 50°C.
  • UL File No. EX26863
  • Stainless Steel name plate
  • RAL 3000 Standard red painted.
  • IP55 Degree of Protection
  • Altitude rating of 1000 meters above sea level
  • F1 foot mounting
Specifications

UL LISTED TEFC MOTORS

SERIES: NM, PERFORMANCE RATINGS: COMPREHENSIVE RANGE

2 POLE AVAILABLE RATINGS: 10 HP - 500 HP**

Rated Voltage

380-400-415v (50Hz), 208-230v* (60Hz), 380-400v (60Hz), 440-460v (60Hz) & 575 (60Hz)

Rated Speed

2923 - 2980 (50Hz) & 3506 - 3575 (60Hz)

 

4 POLE AVAILABLE RATINGS: 10 HP - 400 HP**

Rated Voltage

380 - 415V (50Hz), 208 - 230v (60Hz), 380-400v (60Hz), 460v (60Hz) & 575v (60 Hz)

Rated Speed

1460 - 1480 RPM (50Hz) & 1750 - 1780 RPM (60Hz)

 

** These values only indicate the overall range available in this series. For the availability of any specific ratings and details of its certification, kindly send us an inquiry and we shall gladly assist.

CUSTOM DESIGNED TEFC MOTORS

SERIES: NM, PERFORMANCE RATINGS: COMPREHENSIVE RANGE

 

2 POLE AVAILABLE RATINGS: 1 HP - 250HP**

Rated Speed

2825 - 2975 (50Hz) & 3390 - 3570 (60Hz)

 

** These values only indicate the general range available in this series. For the availability of any specific ratings not mentioned, kindly send us an inquiry and we shall gladly assist.

 

 

Resources

Certified TEFC Motor - General Catalogue

Download

Custom TEFC Motor - General Catalogue

Download

Installation, Operation & Maintenance Manual - NM Series

Download

Revit File

Download

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