The LOHER VARIO Ex d(e) series has a welded steel enclosure for the highest degree of variability and versatility. Flange rings at the ends of the enclosure increase the torsional stiffness and ensure a vibration-proof mechanical design. The steel version allows various bearing concepts, dimensions can be adapted and a wide range of instruments can be mounted.The surface cooling using flat ribs combined with a defined inner cooling circuit with shaft-mounted fan inside the motor ensure optimum motor utilization. The copper bar rotors used as standard allow starting and operating parameters to be optimized for each and every application.With power ratings up to 2800 kW, these motors are mainly used for conveying, transporting and compressing. The rugged version allows safe, reliable and straightforward operation in Zone 1 both for line and converter operation.
DN.. / MLFB: 1PS4, 1PS5
355, 400, 450, 500, 560, 630
90 kW - 2800 kW
Number of poles:
2 - 16 poles, higher pole numbers on request
380 V - 950 V
380 V / 400 V / 415 V / 500 V / 660 V / 690 V
Degree of protection:
IP55, IP56, IP65, IP67, IP68
IC 411, IC 416
Type of construction:
IM B3, IM B35, IM V1
Roller bearings, sleeve bearings (only for gas group IIB)
IEC, EN, DIN, VDE
II2G Ex d(e) IIB T4, II2G Ex d(e) IIC T4
Type of protection:
without explosion protection
max. 86 dB(A) (Load, 50 Hz), lower noise versions are available
Also available for exceptional requirements such as dust explosion protection or double protection Ex e and Ex d.
Corrosion protection using special paint finishes according to the manufacturer's standard or customer's specification.
The motors are available as special version for polar regions down to -40 °C (without pre-heating of the motor) or desert regions up to +60 °C.
When required, vertical motors can also be equipped with thrust bearings for high axial and radial loads.
Operation with frequency converters is possible without any complex system test.
Wide range of connection systems for large cable cross-sections, high short-circuit strength or phase-segregated version.
Optimized starting and operating parameters and high efficiency by using copper bar rotors as standard.
Complies with almost all of the user requirements and specifications (no deviation philosophy)
Engineered based on international standards (ATEX, NEPSI, GOST-R, CCOE certified)
High level of acceptance in the various sectors. For instance, Shell and DOW recommend these motors
Complete project documentation guarantees minimum planning costs
High degree of cost effectiveness and low operating costs as a result of the optimum electrical and mechanical values
High degree of variability and versatility using a welded steel enclosure (to adapt the dimensions, mounted components)
Used in Ex-Zone 1 and 2 for
Branch Oil & Gas