Current Transformers (CT's)

Current transformers are used for the measurement of electric alternating currents. When current in a circuit (primary current) is too high to directly apply to measuring instruments, a current transformer produces a reduced current (secondary current) accurately proportional to the current in the circuit, which can be conveniently connected to measuring and recording instruments. A current transformer also isolates the measuring instruments from what may be very high voltage in the monitored circuit.
Relationship between primary and secondary currents is called rated transformation ratio.


• Wide range of accuracy classes: 0.2S, 0.2, 0.5, 1
• Wide range of supported primary currents, the dimensions of rails, the length of casing and hole diameters.
• Multiple mounting methods, including wall mounting, 35mm DIN rail, the conductor, a current bar.
• Shields designed to seal connections.
11 products with 27 variants
Wound Primary CT, LCTM Series
LUMEL

Wound Primary CT, LCTM Series

  • 0.2S, 0.2, 0.5, 1 Accuracy classes
  • Wide range of supported primary currents
  • 5A and 1A Outputs
  • Range of mounting options
Product has 2 parts.
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Round Conductor CT, LCTR Series
LUMEL

Round Conductor CT, LCTR Series

  • 0.2S, 0.2, 0.5, 1 Accuracy classes
  • Wide range of supported primary currents
  • 5A and 1A Outputs
Product has 4 parts.
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Busbar Series, LCTB 50
LUMEL

Busbar Series, LCTB 50

  • 0.5,1 Accuracy classes
  • 40>600A Primary current
  • 1A/5A Secondary current
  • Ø21 or Ø26mm Hole diameter
Product has 1 parts.
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Current transformer busbar series lumel
LUMEL

Busbar Series, LCTB 62

  • 0.2s,0.2,0.5s,0.5,1 Accuracy classes
  • 40>800A Primary current
  • 1A/5A Secondary current
  • Ø28/Ø30 or Ø31mm Hole diameter
Product has 1 parts.
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Busbar Series, LCTB 74
LUMEL

Busbar Series, LCTB 74

  • 0.2s,0.2,0.5s,0.5,1 Accuracy classes
  • 30>1000A Primary current
  • 1A/5A Secondary current
  • Ø20/Ø26/Ø35 or Ø41mm Hole diameter
Product has 1 parts.
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Busbar Series, LCTB 86
LUMEL

Busbar Series, LCTB 86

  • 0.2s,0.2,0.5s,0.5,1 Accuracy classes
  • 50>1600A Primary current
  • 1A/5A Secondary current
  • Ø36/Ø46 or Ø51mm Hole diameter
Product has 1 parts.
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Busbar Series, LCTB 100
LUMEL

Busbar Series, LCTB 100

  • 0.2S, 0.2, 0.5, 1 Accuracy classes
  • 400>2500A Primary current
  • 1A/5A Secondary current
  • For 41x103mm/38x128mm Busbar
Product has 1 parts.
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Busbar Series, LCTB 104
LUMEL

Busbar Series, LCTB 104

  • 0.2S, 0.2, 0.5, 1 Accuracy classes
  • 400>800A Primary current
  • 1A/5A Secondary current
  • Ø54 or Ø65mm Hole diameter
Product has 1 parts.
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Busbar Series, LCTB 140
LUMEL

Busbar Series, LCTB 140

  • 0.2S, 0.2, 0.5s, 0.5, 1 Accuracy classes
  • 200>5000A Primary current
  • 1A/5A Secondary current
  • Ø72 or Ø86mm Hole diameter
Product has 1 parts.
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Busbar Series, LCTB 225
LUMEL

Busbar Series, LCTB 225

  • 0.2s,0.2,0.5s,0.5,1 Accuracy classes
  • 600>7500A Primary current
  • 1A/5A Secondary current
  • For 124x93mm/166x65mm Busbar
Product has 1 parts.
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Split Core Series, LCTS
LUMEL

Split Core Series, LCTS

  • 0.5,1 Accuracy classes
  • 100>5000A Primary current
  • 1A/5A Secondary current
  • 4x Window dimension options
Product has 13 parts.
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