High-voltage 3-P Motors

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Loher high-voltage motors

Product Name: Loher high-voltage motors
Product NO: Loher high-voltage motors
Power: 355 kW - 10000 kW
Rated Voltages: 3000 V - 11000 V
Number of poles: 2/4/6/8
Frequency: Line and converter operation
Peotection class: IP23, IP55, IP56
Frame Size:

Detail

 Overview

Loher high-voltage motors have been specially tailored to address extreme applications such as winch drives on the decks of ships, transporting and pumping natural resources from the depths of the sea, drilling units for tunnels or mining, high and low temperature applications - and especially production plants and machines located in hazardous areas in the chemical, petrochemical and oil & gas industries. Loher motors are available for these applications in all of the usual types of protection. This also includes double protection designs for applications where the danger of explosion is especially high.

 J motor

Overview

J series from Loher 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.

Benefits

  • 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)

 

 
Application
  • Pumps
  • Compressors
  • Fans
  • Blowers
  • Crushers

 

 
 

Technical specifications

Motors:

JH.A / Order No.: 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. 

Vario

Overview

The Vario Non-Ex series has a welded steel enclosure to ensure 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.

Benefits

  • 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)

Application

  • Compressors
  • Fans
  • Centrifuges
  • Smoke extraction fans
  • Test stands

Technical specifications

Motors:

AH.A / Order No.: 1PS0

Shaft heights:

355, 400, 450, 500, 560

Power range:

80 kW - 2800 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:

IP55, IP56, IP65, IP67

Cooling type:

IC 411, IC 416, IC 71W

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 specifications.
  • 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.
  • 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.
  • With water jacket cooling, IC 71W up to 60 % higher power density - compact and low noise. Admirably suited for converter operation with constant load torque and wide field-weakening range.

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