Current Transformers

The latest current transformers make it possible to measure high current values and indicate these using instruments of a much lower rating.
 
Owing to high costs in cable we recommend the use of a Current Transformer for the current measurement above 40A (unless otherwise specified). When choosing a current transformer it is important to not only check the dimensions are suitable but also to check the accuracy class and burden required.
 
You will also need to consider the length of cable between the instrument and CT; size of the cable and the burden required which the instrument will consume. In retro-fit applications it is possible to use a Split Core Current Transformer as it is easier and faster to install. These also come in various sizes and current ratings.
 
We have also developed the Three Phase Current Transformers with plug in connectors for fast installation. The Single Phase Solid CoreCurrent Transformers come in various different shapes and sizes to cater for most busbar or cable dimensions.
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SKU: CT325

  • 14.5mm x 24.5mm Aperture
  • 60-160A Primary Current
  • Secondary M4 Screw Terminals
  • Accuracy Class 0.5, 1 or 3
  • Busbar or DIN Rail Mounted
£20.85
£25.01 inc VAT
SKU: CT335

 
  • 35mm Centres
  • 21mm x 25mm Aperture
  • 100-250A Primary Current
  • Secondary M4 Screw Terminals
  • Accuracy Class 0.5, 1 or 3
  • Mounting Foot or DIN Rail Mounted
£23.65
£28.38 inc VAT
SKU: CT345


  • 45mm Centres
  • 31mm x 31mm Aperture
  • 250-600A Primary Current
  • Secondary M4 Screw Terminals
  • Accuracy Class 0.5, 1 or 3
  • Mounting Foot or DIN Rail Mounted
£25.85
£31.02 inc VAT
SKU: CT335-SC


  • 3 x apertures at 21x25mm
  • Primary current 60 -250A
  • Secondary Terminal pluggable connector
  • 35mm Hole Centres
  • Class 0.5
  • Housing Material Self Extinguishing Nylon
  • SMARTConnect Terminal Plugs
£20.85
£25.01 inc VAT
SKU: CT345-SC


  • 3 x apertures at 31x31mm
  • Primary current 250 -630A
  • Secondary Terminal pluggable connector
  • 45mm Hole Centres
  • Class 0.5
  • Built in DIN rail adaptor and Foot mounting feet
  • Housing Material Self Extinguishing Nylon
  • SMARTConnect Terminal Plugs
£23.05
£27.65 inc VAT