AC Current Transformer to Meet Applications Exceeding 1000A AC

Hioki clamp sensors are best-in-class measuring devices incorporating Hioki’s expertise in current sensing technology. The 9290-10 is a clamp-on adapter rated for 1500A AC, and features a 10:1 CT ratio. In addition to the large clamp diameter, broad frequency characteristics and good phase characteristics, the CT reliably provides Hioki clamp on power meters with expanded range and large current measurements.


  • Output large currents of 1,000 A AC continuously (1,500 A for 5 minutes) at a CT ratio of 10:1
  • Expand the measurement range of normal clamp ammeters
  • Excellent phase characteristics that can be used to expand power meter measurement ranges

Model No. (Order Code)


Basic specifications (Accuracy guaranteed for 1 year)

Note: Cannot use with Model CT 9279

Rated primary current AC 1000 A continued (Maximum 1500 A for 5 minutes or shorter)
Rated secondary current AC 100 A (10 : 1 CT ratio)
Amplitude accuracy ±1.5% rdg.
Phase accuracy ±1.0 ° or less
Frequency characteristic Amplitude: 20 Hz to 5 kHz: ±2.0 % rdg. (deviation from accuracy)
Phase: 20 Hz to 5 kHz: ±1.0 ° or less (deviation from accuracy)
Max. rated voltage to earth 600 V AC rms (insulated wire)
Core jaw dia. φ 55 mm (2.17 in) or 80 mm (3.15 in) × 20 mm (0.79 in) busbar
Dimensions and mass 99.5 mm (3.92 in) W × 188 mm (7.40 in) H × 42 mm (1.65 in) D, 580 g (20.5 oz), cord length 3 m (9.84 ft)
Accessories Instruction manual ×1, Mark band ×6


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