As part of the trade fair SPS IPC Drives 2014, the ATB Group introduced its new transnorm motor range for the first time. The company will launch the surface-cooled motor already at the beginning of 2015.
The new series covers a power range from 180 kW to 2,250 kW with frame sizes from 315 to 560 mm in high- and low-voltage and with 2 to 8 poles. Detailed technical data are given in the table below:
|Low-voltage range||High-voltage range|
|Voltage||400/690 V||3.6/6/11 kV|
|Power||200-2,000 kW||180-2,250 kW|
|Frequency||50/60 Hz||50/60 Hz|
|Motor type||asynchronuous motor with cage rotor||asynchronuous motor with cage rotor|
|Mode of duty||direct duty type S1||direct duty type S1|
|Class of insulation||155 (F); 180 (H)||155 (F); 180 (H)|
|Temperature rise class||155 (F) / 130 (B) *||155 (F) / 130 (B) *|
|Degree of protection||IP 55||IP 55|
|Degree of protection of terminal box||IP 65||IP 65|
|Method of cooling||IC 411, IC 416||IC 411, IC 416|
|Type of construction||IMB3, IMV1||IMB3, IMV1|
|Ambient temperature||-20°C up to 40°C||-20°C up to 40°C|
|Altitude||up to 1,000 m above sea level||up to 1,000 m above sea level|
|* Inverter drive motor 155 (F)||Subject to modiications|
|Power factor||cos j||0.88||0.9||0.92||0.89||0.86||0.88|
|Power factor||cos j||0.89||0.84||0.88||0.89||0.9||0.89|
|Further frame sizes on request||Subject to modiications|
Developed at the site ATB Schorch the new transnorm motor has been thermally optimized using state-of-the-art CFD software (Computational Fluid Dynamics) and provides high power reserves. The ATB design team designed a special rib geometry and optimized the flow pattern in the light of aerodynamic rules, thereby achieving a maximum of heat transfer (see figure 1). Furthermore, a design-perfected internal fan and an axial external fan lead to an efficient transfer of internal heat loss to the external cooling circuit of the machine.
Exceptional is also the ratio of low weight to high performance. By using modular accessories the new transnorm motor can easily and quickly be tailored to customers' special requirements. It is also suitable for the inverter operation. With its compact design, this engine series is also ideally suited for retrofit.
A corresponding Ex version of this series is currently being developed.
Typical applications for this engine series are:
- mills and granulators