DC, 0.5 Hz to 200 kHz, 3-phase 4-wire, High Precision
Power Analyzer for Motor and
Inverter Efficiency

i benchtop power meters and power analyzers are best in class power
measuring instruments for measuring single to three-phase lines
with a high degree of precision and accuracy. The PW3390 is a
high-precision, broad-range power analyzer for measuring electrical
power from DC to inverter frequencies, providing four input channels
to support single- and three-phase inverter motor systems up to
4000 A AC/DC with superior accuracy.

Model No. (Order Code)

PW3390-02D/A output
PW3390-03D/A output, motor analysis

Note: PW3390 by itself does not support current and
power measurements. Optional current sensor and
voltage cord are necessary to measure current or
power parameters. Specify inclusion of Motor
analysis & D/A output upon order for factory
installation. These options cannot be changed or
added after delivery.

Key Features

• ±0.04% basic power accuracy, among the best in its class
• 200 kHz measurement band with flat amplitude and phase accuracy that extend to high frequencies
• Remarkably small and light footprint, enabling high-accuracy measurement to be easily carried out even in the field
• High-accuracy, high-speed calculation of transient-state power in 50 ms; harmonic analysis; display of instantaneous waveforms; noise analysis; and simultaneous parallel calculation of all parameters, including efficiency loss
• Send measured values to HIOKI data loggers using a Bluetooth® wireless technology compatible adapter (LR8410 Link-compatible products)
• Simultaneous measurement of multiple circuits and ability to acquire synchronized data using up to 8 devices (for 32 channels)
• Simple power measurement using clamp-on current sensors
• Measurement of current and power inputs and outputs as part of the new WLTP fuel efficiency international standard

Test Automobile Fuel Economy

Using the Hioki PW3390 to Evaluate Vehicle Fuel Consumption Performance according to the Worldwide Harmonized Light vehicles Test Procedure (WLTP)

The Hioki PW3390 Power Analyzer is extremely effective in evaluating the fuel performance of automobiles, including in accordance with the Worldwide Harmonized Light vehicles Test Procedure (WLTP). Pair with Hioki high accuracy current clamp sensors to achieve high accuracy measurements even within hot engine compartments.

Evaluate WLTC Mode Performance - A New Fuel Economy Standard

Taking fuel economy measurements that comply with WLTP international standards requires the precise measurement of current integration and power integration for the recharging/discharging of each battery in the system. High accuracy clamp current sensors, the excellent DC accuracy of the PW3390, and the ability to integrate current and power at 50 ms intervals are extremely effective in meeting this application.

Optimal Current Sensors for Automotive Testing

Easily connect high accuracy clamp-type sensors without cutting the cables. Sensors operate over a temperature range of -40°C to 85°C (-40°F to 185°F), characteristics that enable highly accurate measurements even inside the engine room of a car.

Current and Power Integration Function by Polarity

DC integration measurement integrates the recharging power and discharging power by polarity for every sample at 500 kS/s, and measures positive-direction power magnitude, negative-direction power magnitude, and the sum of positive- and negative-direction power magnitude during the integration period. Accurate measurement of recharging power and discharging power is possible even if there is rapid repetition of battery recharging/discharging.

Link to Peripheral Devices via External Control

Use external control terminals to START/STOP integration and capture screen shots. This makes it easy to control operations from console switches and link to the timing of other instruments when measuring the performance of an actual automobile.

Proper Accuracy and Bandwidth to Precisely
Measure Inverter Output

Hioki PW3390 Power Analyzer: Delivering High Accuracy and Mobility in One Single Device

The HIOKI PW3390 Power Analyzer offers ±0.04% ±0.05% f.s. power accuracy, the top of its class. With a 200kHz measurement bandwidth and flat amplitude and phase characteristics up to high frequencies, as well as a powerful phase shift correction function that maximizes the power of its original current sensors, the PW3390 can now be utilized by researchers and developers to high frequency, low power factor power with absolutely accuracy. Apply the PW3390 and HIOKI current sensors to power conversion efficiency evaluations and the analysis and harmonic studies of EV and HEV inverter motors.

Complete Pursuit of Measurement Accuracy and High Frequency Characteristics

The PW3390 delivers 4 input channels and ±0.04% basic accuracy for power - the top instrument in its class. Achieve more precise measurements of the power and efficiency of high efficiency equipment used in power electronics. Further, a 200 kHz measurement band and flat amplitude and phase characteristics up to high frequencies enable the precise measurement of power at top frequency levels and low power factor.

Power Analysis Engine That Achieves High-Speed Simultaneous Calculation on 5 Systems

Precisely capture input waveforms with 500 kS/s high-speed sampling and a high resolution 16-bit A/D converter. The power analysis engine performs independent digital processing for 5 systems: period detection, wideband power analysis, harmonic analysis, waveform analysis, and noise analysis. High-speed simultaneous calculation processing enables both precise measurements and a 50 ms data refresh rate.

Hioki PW3390 Power Analyzer: Expand Measurement Possibilities with a Rich Lineup of Current Sensors

Hioki designs and manufactures current transducers with superior precision, high accuracy clamp sensors that provide ultimate measurement convenience, and flexible current sensors that support up to 6000A of current for measuring power with the Hioki PW3390 Power Analyzer. With this diverse lineup of current sensors, customers can easily meet applications such as testing the secondary side of inverters to measuring large currents from commercial power lines. The superior performance of the PW3390 is housed in a compact footprint that enables researchers and developers to easily and accurately analyze power and power-related parameters including voltage, current, power, harmonics, signal waveforms as well as power efficiency.

Current Sensors for the Thorough Pursuit of High Accuracy

-High Accuracy Sensor Pass-Through Type
Pass-through type with high accuracy and a wide measurement range. Conduct extremely accurate measurements of large currents to a maximum of 1000 A over a wide operating temperature range.

-High Accuracy Sensor Clamp Type
Clamp for quick and easy connections. Conduct extremely accurate measurements of large currents to a maximum of 1000 A over a wide operating temperature range.

-High Accuracy Sensor Direct Wire Type
Newly developed DCCT method delivers expansive measurement range and superior measurement accuracy at a rating of 50 A.

Built-in Current Sensor Phase Shift Function
Achieve Superior Accuracy for High-Frequency, Low Power Factor Power

Equipped with new virtual oversampling technology. Achieve phase shift equivalent to 200 MS/s while maintaining a high speed of 500 kS/s, as well as a high resolution of 16 bits. Set and correct the phase error of the current sensor at a resolution of 0.01°. Use of the phase shift function results in a dramatic reduction of measurement error. This allows the measurement of high-frequency, low-power factor power included in the switching frequency of inverter output, which is difficult to measure with conventional equipment.

* Virtual oversampling: Technology that uses a sampling frequency several hundred times higher than the actual sampling frequency to perform virtual deskewing.

In the Laboratory or in the Field

Take Highly Accurate Measurements Even in Tough Temperature Conditions

Severe temperature environments, such as engine rooms with intense temperature changes and constant temperature rooms, can hinder high accuracy measurements. The extremely accurate pass-through and clamp type sensors both feature excellent temperature characteristics and a wide operation temperature range to help address these challenges.

Achieve High Accuracy Measurement Even in the Field

Dramatically compact and light-weight form factor achieved by concentrating the calculation functions in the power analysis engine. Highly accurate measurements normally achieved in the laboratory are now also possible in the field.

Max. 6000 A Measurement on 50 Hz/60 Hz Lines

The CT7040 AC FLEXIBLE CURRENT SENSOR series can measure commercial power lines up to 6000 A, including solar power conditioner output. Even thick cables can be wired easily among crowded wiring or in narrow locations.

External Power Supply Not Needed for Sensor Connections

Power can be supplied to the current sensor from the main unit, so there is no need to provide a separate external power supply for the current sensor. Connected sensors are recognized automatically, for reliable and quick measurements.

Wiring Displays and Quick Setup Lets You Begin Measuring Immediately

Perform wiring while checking wiring diagrams and vectors on the screen. Optimum settings are performed automatically simply by selecting a connection and using the quick setup function.

New Method for Measuring Large Current over Multi-Cable Wiring

Highly accurate measurement of current in multi-cable wiring with large currents has been difficult-until now. The CT9557 adds the output waveforms from the high accuracy sensors connected to each branch line of the multi-cable wiring, for the highly accurate measurement of large currents.

Extensive Interface for Linking with External Devices

Wide variety of built-in interfaces, including LAN, USB (communication, memory), CF cards, RS-232C, synchronization control, and external control.
D/A output* delivers analog output at 50 ms for up to 16 parameters. The voltage and current waveform for each channel can also be output.

* Built-in for PW3390-02 and PW3390-03

Switch Screens with a Single Touch, Accessing a Variety of Power Analysis Methods

The power analysis engine allows the simultaneous, parallel calculation of all parameters. Access a variety of analysis methods simply by pressing the page keys to switch screens.

Measure the Power Conversion Efficiency of Inverters

Highly Accurate and Fast 50 ms Calculation of Power in Transient State

Measure power transient states, including motor operations such as starting and accelerating, at 50ms refresh rates. Automatically measure and keep up with power with fluctuating frequencies, from a minimum of 0.5Hz.

Combined Accuracy of Current Sensors Applicable throughout Entire Range

Combined accuracy throughout the entire range is provided through the use of a built-to-order high accuracy pass-through type current sensor. Obtain highly accurate measurements regardless of range, from large to minute currents, even for loads that fluctuate greatly.

* High-accuracy specifications are not defined for the built-to-order high accuracy current sensor when used alone.

Measure High-Frequency Noise in Inverters

Power supply problems caused by high switching inverter frequencies are unrelated to the fundamental frequency, making it difficult to conduct proper harmonic analysis. The noise analysis function performs a frequency analysis of noise components up to 100 kHz, and displays the frequency, and voltage and current levels for the top 10 points. This is effective for measuring high-frequency noise in inverters.

Acquire Data from up to 8 Synchronized Units (32 Channels)

When you connect CONNECTION CABLE 9683 to multiple PW3390 units, the control signals and internal clocks synchronize. From the master unit, you can control the measurement timing on the PW3390 units that are set as slaves. With interval measurement, you can save synchronized measurement data to a CF card or a PC to achieve simultaneous measurements across a larger number of systems.

Analyze and Measure EV/HEV Inverter Motors

Electric Angle Measurement of Motors (PW3390-03 only)

The PW3390-03 features a built-in electric angle measurement function required for vector control via dq coordinate systems in high-efficiency synchronized motors. Make real-time measurements of phase angles for voltage and current fundamental wave components based on encoder pulses. Further, zero-adjustment of the phase angle when induced voltage occurs allows electric angle measurement based on the inductive voltage phase. Electric angle can also be used as an Ld and Lq calculation parameter for synchronized motors.

Measure Harmonics with Consideration for PWM Waveform Characteristics

The zero-crossing filter automatically matches the input frequency in the range of 0.5 Hz to 5 kHz to reliably detect the fundamental frequency. Further, harmonic analysis that is based on the fundamental frequency automatically prevents aliasing error using a digital AAF, which allows both precision and measurement reproducibility at a high level.

Transfer to Data Logger via Bluetooth® wireless technology

Connect the PW3390 and a data logger (with support of LR8410 Link) via Bluetooth® wireless technology to wirelessly transmit 8 parameters of measurement values from the PW3390 to the data logger. In addition to the voltage, temperature, humidity, and other parameters measured by the multichannel data logger, you can also integrate the measurement values of the PW3390 and observe and record them in real time.

Measure the Efficiency of PV Power Conditioners (PCS)

HIOKI's Current Measurement Solutions for Large Currents of 1000 A or More

Introducing a lineup of sensors taking measurements up to 6000 A for 50 Hz/60 Hz, and up to 2000 A for direct current. The CT9557 SENSOR UNIT lets you add the output waveforms from multiple high accuracy sensors. Use multi-cable wiring lines to take highly accurate measurements of up to 4000 A.

Support for PCS Parameters

Simultaneously display the parameters required for PCS, such as efficiency, loss, DC ripple factor, and 3-phase unbalance rate. Easily check the required measured items for improved test efficiency. By matching the measurement synchronization source for both input and output, you can perform DC power measurements that are synchronized with the output AC as well as stable efficiency measurements.

±0.01Hz Basic Accuracy for Voltage Frequency Measurements

Perform the frequency measurements that are required for various PCS tests with industry-leading accuracy and stability. Take highly accurate frequency measurements on up to 4 channels simultaneously, while also measuring other parameters at the same time.


"PW Communicator" PC Communication Software

PW Communicator is an application program for communicating between a PW3390 series power analyzer and a PC. It includes many useful functions, such as configuring PW3390 settings, monitoring measurement values, saving CSV data, and calculating efficiency.

-Numerical value monitoring
Display the PW3390's measurement values on the PC screen. You can freely select up to 32 values, such as voltage, current, power, and harmonics.

-Waveform monitoring
Monitor the measured voltage, current, and waveforms on the PC screen.

-Meter setting
Change the settings of the connected PW3390 from the PC screen.

-Measure with multiple units
In addition to the PW3390, it is also possible to perform batch control of up to 8 devices from the HIOKI PW6001 Power Analyzer and the PW3335, PW3336, and PW3337 Power Meter series. You can also simultaneously record measured data to the PC, and perform efficiency calculations for measuring instruments.

-Record in CSV format
Record measured data to a CSV file at regular time intervals. The minimum recording interval is 50 ms.


Rackmount fittings

For EIA or JIS. Please contact your Hioki distributor or subsidiary for more information.

Basic specifications (Accuracy guaranteed for 6 months, Post-adjustment accuracy guaranteed for 6 months)

Measurement line typeSingle-phase 2-wire, single-phase 3-wire, three-phase 3-wire, three-phase 4-wire, Voltage 4 channels, Current 4 channels, Isolated between each channel
Measurement itemsFrequency, RMS voltage, voltage mean value rectification RMS equivalent, voltage AC component, voltage simple average, voltage fundamental wave component, voltage waveform peak +, voltage waveform peak -, voltage total harmonic distortion, voltage ripple factor, voltage unbalance factor, RMS current, current mean value rectification RMS equivalent, current AC component, current simple average, current fundamental wave component, current waveform peak +, current waveform peak -, current total harmonic distortion, current ripple factor, current unbalance factor, active power, apparent power, reactive power, power factor, voltage phase angle current phase angle, power phase angle, positive-direction current magnitude, negative-direction current magnitude, sum of positive- and negative-direction current magnitude, positive-direction power magnitude, negative-direction power magnitude, sum of positive- and negative-direction power magnitude, efficiency, loss
Current integration, active power integration
PW3390-03 only: Torque, Rotation, Frequency, Slip, or Motor power
Harmonic measurementInput: 4 ch, Synchronization frequency range: 0.5 Hz to 5 kHz,
Number of harmonic orders: Max. 100th order
Noise measurementNumber of channels: 1 ch (select one channel from CH1 to CH4),
Maximum analysis frequency: 200 k/ 50 k/ 20 k/ 10 k/ 5 k/ 2 kHz
Motor Analysis (PW3390-03 only)Input: 3 ch (CH A, CH B, CH Z), Measurement parameters: Voltage, torque, rotation rate, frequency, slip, and motor power
Measurement rangeVoltage range: 15 to 1500 V, 7 ranges
Current range: 0.1 A to 20 kA (depends on current sensor)
Effective measuring power range0.0150 W to 39.600 MW (determined automatically by the combination of voltage range, current range, and measurement line)
Basic accuracy (45 to 66 Hz)Voltage: ±0.04 % rdg. ±0.05 % f.s.
Current: ±0.04 % rdg. ±0.05 % f.s. + current sensor accuracy
Active power: ±0.04 % rdg. ±0.05 % f.s. + current sensor accuracy
Synchronization frequency range0.5 Hz to 5 kHz
Frequency bandDC, 0.5 Hz to 200 kHz
Data update rate50 ms (For harmonic/frequency measurement, depends on the synchronization frequency when less than 45 Hz)
Display refresh rate200 ms (Independent of internal data update rate; waveform and FFT depend on the screen)
Auto-Save FunctionsEach value is stored to CF card during every measurement interval (not available for USB storage), OFF, 50 msec to 500 msec, 1 sec to 30 sec, 1 minute to 60 minutes, 15 settings
External interfacesLAN, USB (for communication/ memory), RS-232C (for communication/LR8410 link), CF card, Synchronization control, External Control
Logger connectivitySends measured values wirelessly to logger by using a BluetoothⓇ wireless technology serial conversion adapter. (Supported devices: Hioki LR8410 Link-compatible loggers)
Power supply100 to 240 V AC, 50/60 Hz, 140 VA max.
Dimensions and mass340 mm (13.39 in)W × 170 mm (6.69 in)H × 156 mm (6.14 in)D, 4.6 kg (162.3 oz)
AccessoriesInstruction Manual ×1, Power cord ×1, Measurement Guide ×1, USB cable ×1, Input cord label ×2, D-sub connector × 1 (PW3390-02, PW3390-03)
Catalog: AC/DC CURRENT BOX PW9100Download PDF  [1MB]English
Catalog: POWER ANALYZER PW3390Download PDF  [5MB]English
Flyer Catalog: LR8410 LinkDownload PDF  [1MB]English

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