Raising the Bar for High-Accuracy Measurement

Hioki pass-through AC/DC current sensors are best-in-class devices for use with power meters, Memory HiCorders and high performance oscilloscopes. The CT6877 is a DC to 1 MHz/2000 A sensor, ideal for evaluating the inverter power conversion efficiency in next generation devices.
The CT6877 delivers a wide frequency band and excellent noise resistance, prerequisites for properly evaluating inverters motors used in electric vehicles and hybrid vehicles, a class of devices that continue to move toward ever larger currents and higher-frequency switching.

CAT III 1000 V

Use with an instrument with a high input impedance of 1 MΩ or higher.

Key Features

  • Combined accuracy with HIOKI power analyzer PW8001, PW6001 and PW3390 is specified. For details of combined accuracy, refer to the instruction manual.
  • Measures high-current up to 2000 A for EV, HEV and other electric vehicles
  • Improved noise resistance performance through a stronger shield lets you accurately measure current buried in noise
  • High accuracy measurement realized through flat frequency characteristics and CMRR performance
  • More enhanced environmental resistance performance than ever before lets you measure in -40 to 85°C situations
  • Superior frequency characteristics of DC to 1 MHz (amplitude)
  • Meet a wide range of applications from measuring battery charge/discharge to the secondary side of inverters in photovoltaic power generation and fuel cell evaluation, etc. 
  • Monitor waveforms when paired with oscilloscopes or Memory HiCorders and Sensor Unit

Model No. (Order Code)

CT6877 2000 A AC/DC, ME15W terminal, 3 m (9.84 ft) cable length
CT6877-01 2000 A AC/DC, ME15W terminal, 10 m (32.81 ft) cable length

Collectively measure wires carrying up to 2000 A

Thanks to its large, 80 mm aperture, the CT6877A can accommodate four wires with an outer diameter of 31 mm (equivalent to a cross-sectional area of 250 mm^2). In this way, a single sensor can be used to collectively measure wires carrying up to 2000 A.

Flux gate detection

Flux gate detection delivers outstanding linear properties, and can measure currents of a wide range of magnitudes with high accuracy.
The fluxgate components used for DC detection have very low offset over a wide temperature range due to their operating principle, resulting in high accuracy and excellent temperature stability. It is ideal for measurements that require high accuracy, such as Power analyzers and Power meters. It can be used for measurement such as inverter efficiency, inverter output power, reactor/transformer loss, and long-term DC measurements.

Automatic Phase Correction function

To accurately measure high frequency and low power factor, it is important to correct phase errors. The PW8001 automatically acquires and corrects the phase of the current sensor with 0.001°resolution, bringing out the best performance of the current sensor without any effort.

Example of the CT6877A being used with the Power Analyzer PW8001

From DC to 1 MHz, industry’s proven solution for high-accuracy power analysis.
The PW8001 features a phase shift function for current sensors to lock in accurate measurement of high-frequency power.
15 MS/s sampling at 18-bit resolution ensures true power analysis of PWM waveforms and results that are free of aliasing error.

Basic specifications

Accuracy guaranteed: 1 year
Rated current 2000 A AC/DC
Max. allowable input Within the derating range, (within the specified range up to ±3200 Apeak )
Frequency characteristics Amplitude: DC to 1 MHz, Phase: DC to 700 kHz
Basic accuracy (DC, 45 Hz ≤ f ≤ 66 Hz) Amplitude: ±0.04 % rdg. ±0.008 % f.s., Phase: ±0.08°
Output voltage rate 1 mV / A rated (This device outputs AC+DC voltage via the Sensor Unit)
Max. rated voltage to earth 1000 V AC/DC (50/60 Hz, CAT III )
Core diameter φ 80 mm (3.15 in)
Operating temperature, humidity -40°C to +85°C (-40°F to 185°F), 80% RH or less (with no condensation)
Power supply Power suppled via the Power Analyzer PW8001, PW6001, PW3390, Sensor Unit CT9555, CT9556, CT9557, or 3CH CURRENT UNIT U8977
Max. rated power 9.5 VA max. (at 2000 A/55 Hz, ±12 V power requirement)
Dimensions and mass 229 mm (9.02 in)W × 232 mm (9.13 in)H × 112 mm (4.41 in)D, CT6877A: 5 kg (176.4 oz), cable length 3 m (9.84 ft), CT6877A-1: 5.3 kg (186.9 oz), cable length 10 m (32.81 ft)
Included accessories Instruction Manual ×1, Mark bands ×6, Operating Precautions ×1

External power supply, Connection cord (5)

Compatible products PW3335, PW3336, PW3337, MR6000, MR8847A, MR8827, MR8740T, MR8740, MR8741, MR8870, MR8880, MR8875

Conversion/Extension cables (2)

The CT9902 connects up to 2 cables in series

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