AC/DC CURRENT SENSOR CT6904A, CT6904A-1
Best-in-class Measurement Bandwidth with High Accuracy
Hioki's pass-through type AC/DC current sensors can be connected directly to Hioki Power Analyzers and Memory HiCorders. Also, it can be connected to Power Meters, Oscilloscopes, DMMs, etc. by using an optional sensor unit.
The CT6904A has a frequency bandwidth of DC to 4 MHz (Model CT6904A-1 is DC to 2 MHz) and a rated current of 500 A. It is used in research and development fields such as loss measurement of high-frequency reactors, wireless charging systems, and EV inverter motors.
Use with an instrument with a high input impedance of 1 MΩ or higher.
- Combined accuracy with HIOKI power analyzer PW8001 and PW6001 is specified. For details of combined accuracy, refer to the instruction manual.
- 500 A (rms) rated for measurement of large currents
- CT6904A: DC to 4 MHz (±3 dB), CT6904A-1: DC to 2 MHz (±3 dB) wide measurement frequency range
- ±5 ppm excellent linearity
- 120 dB (100 kHz) high Common-Mode Rejection Ratio (CMRR)
Model No. (Order Code)
|CT6904A||Cable length: 3 m (9.84 ft.)|
|CT6904A-1||Build-to-order, cable length: 10 m (32.81 ft.)|
Unparalleled technology driving the evolution of current measurement
High-accuracy sensors uses the "zero flux method (flux gate detection type)." High-frequency currents are detected with the winding (CT method), and DC to low frequency currents are detected using a "flux gate."
Wide frequency band
The CT6904A has a frequency bandwidth of DC to 4 MHz (Model CT6904A-1 is DC to 2 MHz), which is top-class for a 500 A rated pass-through sensor. In combination with the Power Analyzer PW8001, high frequency and low power factor can be measured accurately.
High Noise Resistance
Automatic detection capability for even greater convenience
|Rated current||500 A AC/DC|
|Max. allowable input||Within the derating range, However, up to ±1000 A peak is allowable if within 20 ms. (design value)|
|Frequency bandwidth||Amplitude: DC to 4 MHz (CT6904A), DC to 2 MHz (CT6904A-1)
Phase: DC to 1 MHz
|Linearity||±5 ppm Typical (23°C (73°F))|
|Offset voltage||±10 ppm Typical (23°C (73°F), no input)|
|Basic accuracy||DC (Amplitude: ±0.025 % rdg. ±0.007 % f.s., No phase specification)
45 Hz ≤ f ≤ 65 Hz (Amplitude: ±0.02 % rdg. ±0.007 % f.s., Phase: ±0.08°)
|Output voltage rate||4 mV / A rated (This device outputs AC+DC voltage via the Sensor Unit)|
|Max. rated voltage to earth||1000 V CAT III|
|Core diameter||φ 32 mm (1.26 in)|
|Operating temperature, humidity||-10°C to 50°C (14°F to 122°F)
80% RH or less (with no condensation)
|Power supply||Power suppled via the Power Analyzer PW8001, PW6001, PW3390, or Sensor Unit CT9555, CT9556, CT9557|
|Max. rated power||7 VA Max. (500 A/55 Hz measurement, with a power supply of ±12 V)|
|Dimensions and mass||139 mm (5.47 in) W × 120 mm (4.72 in) H × 52 mm (2.05 in) D
CT6904A: 1.05 kg (37 oz), cable length 3 m (9.84 ft)
CT6904A-1: 1.35 kg (47.6 oz), cable length 10 m (32.81 ft)
|Included accessories||Instruction Manual ×1, Carrying case ×1, Color labels (for channel identification) ×1, Operating Precautions ×1|
External power supply, connection cord (5)
Conversion cable/extension cable (2)
The CT9902 connects up to 2 cables in series (Accuracy addition required)