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Heat Trace Ltd.
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Heat-Trace - Model LLR Series -Longline Round Heating Cables

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Longline Round (LLR) heating cables are high performance Series Resistance heaters for long pipelines where temperature maintenance or freeze protection is needed. They are used where circuit lengths exceed the capabilities of parallel resistance self-regulating or constant power heaters in order to minimise the number of electrical supply points. Circuit lengths of multi-kilometre are possible from a single supply point.

Longline Round (LLR) provides constant power per unit length without voltage drop along the length. Hence round heating cable may be provided for single or 3phase connection.

The continuous metal jacket allows for increased mechanical strength, reducing the risk of damage and providing superior fire-resisting properties compared with most heating cables.

  • Freeze protection of long pipelines
  • Temperature maintenance of long pipelines

  • Circuit lengths up to 60km
  • Suitable for single or 3 phase applications
  • Metal jacket for increased mechanical strength and fire resistance

  • Maximum Withstand Temperature ( Power off ) : 230°C (446°F)
  • Minimum Installation Temperature : -40°C (-40°F)
  • Minimum Operating Temperature : -60°C  (-76°F)
  • Rated Voltage : up to 1500V single phase 2500V 3-Phase
  • Cable Dimensions : see data sheet
  • Minimum Bending Radius : see data sheet