CTT0191 Toroidal Current Transformer, High Voltage

Model Rated Current (Ampere) Maximum Current (Ampere) Opening (mm/in)
CTT0191-0030A/ 0.333V 30A 130A 19.1/ 0.75
CTT0191-0050A/ 0.333V 50A 130A 19.1/ 0.75
CTT0191-0070A/ 0.333V 70A 130A 19.1/ 0.75
CTT0191-00100A/ 0.333V 100A 130A 19.1/ 0.75
Specifications:Toroidal Current Transformer
  • Input Frequency: 50/ 60HZ
  • Maximum Primary Voltage: 5,000 Vac (Insulated Conductor)
  • Secondary Output: 0.333V @ rated current
  • Accuracy: ±1% from 10% to 130% of rated current
  • Phase Angle: less than 1 degrees at 50% of rated current
  • Insulation Voltage: 600 Vac
  • Operating temperature: -15ºC to +60ºC
  • Construction:
    • Epoxy encapsulated with case housing (ABS Resin UL flame retardant rating 94V-O) or
    • Polyster tape covering.
  • Leads: 0.61m (2 ft.), UL 1015 twisted pair, 0.34mm (22AWG)
  • RoHS Compliant
Physical Specifications:
Dimension mm (in)
A B C D F G Mounting slot
76.2 (3.00) 19.0 (0.75) 59.7 (2.35) 19.1 (0.75) 63.5 (2.50) 53.3 (2.10) 5.3 (0.21)
Standard Sizes
  • CTT0076 standard models – 7.6mm (0.30in) window
  • CTT0127 standard models – 12.7mm (0.50in) window
  • CTT0150 standard models – 15.0mm (0.59in) window
  • CTT0191 standard models – 19.1mm (0.75in) window
  • CTT0254 standard models – 25.4mm (1.00in) window
  • CTT0318 standard models – 31.8mm (1.25in) window
  • CTT0350 standard models – 35.0mm (1.37in) window
  • CTT0508 standard models – 50.8mm (2.00in) window



Many of our products can be designed and manufactured to meet the specific application requirements. For a no obligation technical evaluation, please provide the specific performance requirements to engineering@tichenassociates.com.