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04.06.2018 [ [more] ]

New Factory in SarstedtIn addition to the existing plant, a new state-of-the-art manufacturing facility is under construction at the HELMKE site in Sarstedt (near Hannover, Germany).[ [more] ]

Drive systems - engineered by HELMKEHELMKE is a worldwide acknowledged competence for the delivery of complete drive systems. The converter cabinets engineered by HELMKE are projected and manufactured for customized and branch-specific applications.[ [more] ]

Ex 'p'- The alternative to explosion-proof electric motors (Ex'd')

The opportunity of widly common basic motors for Ex nA e and Ex px e allows to extend stocked motors for zone 2 to use in zone 1 in a relatively short time and also to get the certification from the notified body. Opposite to explosion-proof motors in flameproof design, the pressurized enclosure makes it possible to reduce the weight and frame size.

The customer resp. operator only requires:

  • Compressed air in sufficient quantities (depending on the type of construction and frame size)
  • Additional control cables

Possible modifications

Alteration of Ex nA e IIC T3 Gc motors
to Ex px e IIC T3 Gb for the operation in Zone 1

Basis: Motor II 3 G Ex nA e IIC T3 Gc
Result: Motor II 2 G Ex px e IIC T3 Gb

For diverse methods of cooling:

  • Rib cooling IC411
  • Air cooling IC611
  • Water cooling IC81W

Alteration from NDOR into PEDOR
  • Pump drive for marine operation
    with DNV certificate
  • Three-phase squirrel-cage motor
  • Ex px e IIC T3 Gb with
    pressurized enclosure
  • Make: HELMKE
  • Type: PEDOR400-02
  • Technical data:
    • 6,600 V
    • 750 kW
    • 02-pole
    • 50 Hz
    • IC 411
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