LOHER VARIO PLUS series have a modular cooling design featuring double-flow inner cooling for a high power density and a homogeneous temperature distribution.2 versions are available:
Mounted air-water heat exchanger (JNWK–... type for roller bearings / JNXK-... for sleeve bearings):Optimum cooling is guaranteed specifically for these series due to the harmonized and coordinated heat exchanger. The motor power loss is dissipated through the cooling water and is therefore de-coupled from the ambient temperature. The heat exchangers are available in a wide variety of versions with single and double pipe types. The high quality heat exchanger materials used are adapted to the specific requirements.Mounted air-air heat exchanger (type JNRK–... for roller bearings / JNQK-... for sleeve bearings):The motors are equipped with air-air heat exchangers. The cooling pipes are manufactured out of galvanized steel; stainless steel versions are available for especially aggressive atmospheres.
JN.K / MLFB: 1PS1
500, 560, 710
200 kW - 5600 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
Line and converter operation
Degree of protection:
IP23, IP55, IP56
IC611, IC616, IC666, IC81W, IC86W, IC01
Type of construction:
IM B3, IM B35, IM V1, IM V10
Roller bearings, sleeve bearings
IEC, EN, DIN, VDE
II3G Ex nA II T3
Type of protection:
without explosion protection
max. 85 dB(A) (Load, 50 Hz), lower noise versions are available
Also available for exceptional requirements - such as dust explosion protection.
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.
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.
All motors have a double flow inner cooling for a high power density and a homogeneous temperature distribution.
Complies with almost all of the user requirements and specifications (no deviation philosophy)
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 2 for
Branch Oil & Gas