Motors acc. to NEMA

Efficiency knows no limits

General description

NEMA motors (National Electrical Manufacturers Association) for the North American market distinguish themselves as a result of their dynamic design – and especially as a result of their efficiency. The motors with copper die-cast rotor offer NEMA Premium Plus efficiencies that are above the NEMA Premium Standard and currently are the highest available in the market. The generation of general purpose and severe duty NEMA motors will be available in frame sizes 140 to 440 with power ratings of between 1 and 400 HP (Horse Power).

Energy-saving motors with efficiency classes Energy Efficient (NEMA MG-1 Table 12-11) and NEMA Premium (NEMA MG-1 Table 12-12) comply with the US EISA legislation for minimum efficiencies. Our NEMA Premium efficiency class exceeds the even higher efficiencies specified in the NEMA standards. The motors are mechanically and electrically compliant with NEMA MG1. In addition to the minimum efficiencies specified in the US, these motors also fulfill the minimum efficiency requirements for Canada (CSA) and Mexico (NOM).

NEMA-Motor

Technical data overview

Brief overview

Voltage and power range:

208 - 230 / 460 V, 575 V, 60 Hz,
1- 400 HP (0.75 - 300 kW)

Frame sizes and designs:

NEMA framesizes 140 to 440

Pole number and frequencies:

2, 4 and 6-pole, 60 Hz

Ambient conditions:

Surface cooled (t.e.f.c.) with degrees of protection IP54 / IP55

Customer benefits

  • Copper die-cast rotors optimize the efficiency 
    The motors with copper die-cast rotor offer efficiencies that lie above the NEMA Premium variants. This version reduces the motor lifecycle costs as a result of the lower energy consumption.

  • Can be easily modified for high versatility
    The mounting feet can be changed-over (aluminum frame) and they have 8- hole mounting feet (gray cast iron frame). These features make it easier to modify the motors – ensuring a high degree of versatility. They also reduce the inventory costs – both for the OEM as well as also for service and maintenance.

  • A design that fulfills each and every requirement
    We have motors with light aluminum frames or with rugged gray cast iron frames – the optimum motor for each and every application. Both of these versions are available in the three efficiency classes. They are a precise fit for each operating period.


Typical applications

NEMA motors are suitable in all types of industries, in sectors such as the automobile, textile, printing, chemical branches as well as in cross-industry applications – for example in conveyor technology. The HVAC sector (Heating, Ventilating & Air Conditioning), which requires extremely light motors are typical applications for our so-called General Purpose motors – either with gray cast iron or aluminum frames. Severe duty motors in a full gray cast iron design are suitable for use in tough ambient conditions – for instance in the pulp and paper industry. The Severe Duty SD100 IEEE 841 motor version even exceeds the stringent IEEE 841 Standards applicable in the crude oil and chemical industries.