LOHER VARIO

High voltage motors for maximum safety and degree of availability in hazardous zones of the oil and gas industry

LOHER VARIO

Rugged and compact high voltage motors in fin, water jacket and tube cooling from 150 kW up to 7 MW. Designed for applications in extreme environments and hazardous zones, especially in oil, gas and petrochemical industry. Available in all of the usual types of explosion protection – also double protection, degrees of protection up to IP66 (special designs up to IP68), special paint finishes, high and low temperature versions and cooling types tailored to the application – make them predestined for sectors such as oil, gas and petrochemical.

Degrees of protection


The LOHER VARIO is available in three different cooling frame types

LOHER VARIO - Fin cooled 0.15 – 2.8 MW

  • Well suited to Zone 1 and highly explosive environments, including those containing hydrogen.

  • Also certified for low temperatures, suitable for use in arctic environments

  • Extremely rugged due to torsional stiff steel frame

  • On request also available in double protection Ex d and Ex e

  • Double certified motors for use in hazardous zones with gas or dust


Water jacket cooled up to 1.85 MW, commonly used in offshore applications

  • Compact design to reduce space required and transport costs

  • Very low maintenance water jacket cooling system

  • Long service life as a result of the uniform cooling

  • Seawater/saltwater can be directly used as coolant

  • Extremely quiet as they have no outer fan – even when converter operated

  • Extremely high overload capability


LOHER VARIO Tube cooled 1.9 – 7 MW

  • Very rugged with stainless steel cooling pipes

  • Special inner cooling system with X ventilation, axial and radial cooling slots for a uniform temperature distribution

  • Flameproof enclosure (Ex d) up to 7 MW


Your Benefits

  • Safe operation also in exceedingly hazardous areas, e.g., LNG tankers

  • Predestinated for extreme locations, e.g. offshore rigs

  • Increased stiffness, low vibration levels, maximum reliability

  • Outstanding suitability for deserts and arctic regions

  • Highly modifiable for individual customer demands retrofit applications

Technical data overview

Brief overview

Shaft heights:

355 – 1000 mm

Power range:

0.15 – 7 MW

No. of poles:

2 – 16 poles (higher on request)

Rated voltages:

3 – 11kV (higher on request)

Degree of protection:

IP55, IP56, IP65, IP66 (special designs up to IP68)

Cooling type:

IC 411, IC 416, IC 511, IC 516, IC 71 W

Explosion protection:

- Non sparking, Zone 2, II 3 G Ex nA IIC T3 Gc 
- Increased safety, Zone 1, II 2 G Ex e IIC T3 Gb
- Flameproof, Zone 1, II 2 G Ex de IIB T4 Gb
- Flameproof, Zone 1, II 2 G Ex de IIC T4 Gb
- Pressurized, Zone 1, II 2 G Ex px IIC T3 Gb


Features

  • Covering all of the applicable types of ex-protection

  • Degree of protection up to IP66 (special designs up to IP68)

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

  • Extremely rugged due to torsional stiff steel frame

  • Available in high and low temperature design

Applications – by industry

industries oil gas siemens

Oil & Gas

industries chemicals siemens

Chemical and Petrochemical

industries marine siemens

Marine & Shipbuilding


Tailored to requirements of pumps, fans and compressors in the Oil & Gas industry, LOHER VARIO motors offer features including all types of explosion protection (as well as double protection) required in the Oil & Gas industry, special coating systems to protect against very humid, salty marine environment (in compliance with Norsok specification), special designs for oil and gas fields in arctic or desert regions, and water-jacket cooled versions for offshore applications such as purging pumps, hoisting gears and rotary tables. Also important to note that also available in designs that fully comply with the API standard and the associated high requirements regarding vibration quality frequently specified in the oil and gas industry.

 Pumps-Compressors Fans

Tailored to requirements of agitators, centrifuges and extruders in the petrochemical industry, LOHER
VARIO motors offer all types of explosion protection (as well as double protection), special coating systems to protect against chemically aggressive ambient atmospheres and special designs for oil and gas fields in arctic or desert regions. Also important to note that also available in designs that fully comply with the API standard and the associated high requirements regarding vibration quality frequently specified in the petrochemical industry.

 Agitators-Centrifuges

For onboard use on liquid gas (LNG) tankers, LOHER VARIO is available in double protection Ex d and Ex e. To address this requirement LOHER VARIO motors have a mechanical design with type of protection “flameproof enclosure”. They also have type of protection “increased safety”, which ensures that specific temperatures of the active parts – both inside the motor as well as on the surfaces – are not exceeded.

 Pumps

Compatible Converters

1 | 2

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  • Compact and rugged design

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  • 2 or 4 quadrant operation



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