LOHER VARIO PLUS

High voltage motors for tailored drive solutions

loher vario plus

Motors with modular cooling from 3 to 10 MW with welded steel enclosure, for maximum safety and availability in demanding applications, predestined for test stands, oil, gas and petrochemical plants. The inner cooling using two shaft-mounted fans ensures a high power density and homogeneous temperature distribution.

Degrees of protection


Your Benefits

  • Safe operation in hazardous areas Zone 1 and 2

  • Compact, reliable and long service life

  • Outstanding suitability for deserts and arctic regions

  • Highly modifiable for individual customer demands and retrofit applications

  • Increased reliability due to availability of redundant cooler and forced ventilation designs

Technical data overview

Brief overview

Shaft heights:

630, 710 mm

Power range:

3 – 10 MW

No. of poles:

2 – 16 poles (higher on request)

Voltage range:

3 – 11 kV (higher on request)

Degree of protection:

IP23, IP55, IP56

Cooling type:

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

Explosion protection:

Non sparking, Zone 2, II 3 G Ex nA IIC T3 Gc
Pressurized, Zone 1, II 2 G Ex px IIC T3 Gb
(Ex tc, Ex e, and Ex pz possible on request)


Features

  • Available in most Ex-protection types including Ex nA and Ex px (Ex tc, Ex e and Ex pz available on request)

  • All motors feature double-flow inner cooling for a high power density and a homogeneous temperature distribution

  • Available in high and low temperature designs

  • Highly modifiable for individual customer demands and retrofit applications

  • Highest degree of flexibility regarding both the electrical and mechanical features e.g.
    - starting characteristics
    - noise requirements
    - vibrvibration limits
    - efficiency requirements

  • Special design for subcritical variable speed operation available

  • Slip ring design available on request

  • Engineered based on international standards (ATEX, NEPSI, EAC (Gost), CCOE certified)

Applications – by industry

industries oil gas siemens

Oil & Gas

industries chemicals siemens

Chemical and Petrochemical


Tailored to the requirements of pumps and compressors in the oil & gas industry, LOHER VARIO PLUS motors are available with explosion protection of Ex nA, Ex e or Ex p specifically to support applications in Zones 1 and 2. Double certification (e.g. with Ex pz and simultaneously Ex nA) can also be implemented on request. The LOHER VARIO PLUS is also available with special coating systems to protect against very humid, salty marine or chemically aggressive environments, plus they also comply with Norsok specifications. Special designs are offered for oil and gas fields in arctic or desert regions, as well as for compliance with API standards and the associated high requirements regarding vibration quality frequently specified in the oil and gas Industry.

 Pumps-Compressors Fans

Tailored to the requirements of agitators and extruders in the petrochemical industry, LOHER VARIO PLUS motors are available with explosion protection of Ex nA, Ex e or Ex p specifically to support applications in Zones 1 and 2. Double certification (e.g. with Ex pz and simultaneously Ex nA) can also be implemented on request. The LOHER VARIO PLUS is also available with special coating systems to protect against chemically aggressive ambient atmospheres. Special designs are offered for compliance with API standards and the associated high requirements regarding vibration quality frequently specified in the petrochemical industry.

 Agitators-Extruders
industries metals siemens

Metals

industries marine siemens

Marine

industries test stands siemens

Test Stands


For rolling mill drives in the metals industries LOHER VARIO PLUS motors are – also in the lower shaft heights from 355 up to 560 mm – available in shockproof, welded steel housing, with high overload capability, forced ventilation and torque rates up to 70 kNm.

For shipbuilding applications such as on board main pumps, thruster or propulsion drives, LOHER VARIO PLUS motors are available with lightweight, space-saving designs, great high vibration quality and low noise level. The motor is also available with special coating systems to protect against aggressive, salty marine environments and fully complies with the specifications of the leading marine classification societies.

 Main propulsion-Thrusters Pumps

The LOHER VARIO PLUS is also utilized in numerous complex and technically sophisticated test stands, such as pump or compressor test beds.

 Test Stands

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1 | 2

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More Information