LOHER VARIO PLUS Siemens

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LOHER VARIO PLUS motors 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

(type JHWA–... for roller bearings / JHXA-... 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 JHRA–... for roller bearings / JHQA-... 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.

Особенности


  • 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)

Технические данные



Motors:

JH.A / MLFB: 1PS0

Shaft heights:

500, 560, 710, 800

Power range:

355 kW - 10000 kW

Number of poles:

2 - 16 poles, higher pole numbers on request

Voltage range:

3000 V - 11000 V

Rated voltage:

3.3 kV / 4.16 kV / 6 kV / 6.6 kV / 10 kV / 11 kV

Frequency converter:

Line and converter operation

Degree of protection:

IP23, IP55, IP56

Cooling type:

IC 611, IC 616, IC 666, IC 81W, IC 86W, IC 01

Type of construction:

IM B3, IM B35, IM V1

Enclosure:

Welded steel

Bearings:

Roller bearings, sleeve bearings

Standards:

IEC, EN, DIN, VDE

Explosion protection:

N.A.

Type of protection:
without explosion protection

N.A.

Noise level:

max. 85 dB(A) (load, 50 Hz), lower noise versions are available



Features

  • 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 or for 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.

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