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.

Key Features

  • 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: 1 year
Note: Cannot use with Model CT9279
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)
Included accessories Instruction manual ×1, Mark band ×6