6
Precision Power Analyzer WT3000
6
Variety of Communication Functions (GP-IB Comes Standard)
USB Port (PC) Option (/C12) * Select USBport (PC) or RS-232
The USB port (type B connector) on the rear panel of the WT3000 allows data
communications with a PC
1
.
1. USB driver required for USB communications. A USB driver is available from our Web
site.
You can take measurements in excess of 30 A by using a 2 A input element together with the model
751574* current transducer.
*See page 10 of the specifications.
When measuring three-phase input/three-phase output with a three-phase four-wire system, you can
measure input and output simultaneously by synchronizing between two units.
Serial (RS-232) (/C2) * Select USBport (PC) or RS-232
Ethernet port (/C7)
The optional Ethernet port (100BASE-TX/10BASE-T) allows you to connect the
WT3000 to a LAN. Once connected, images and numerical value data saved on the
WT3000 can be transferred to a PC using FTP server software or other utilities.
Measurement Applications to Utilize WT3000’s Capabilities
• Measuring Efficiency with High Precision:
Simultaneous Measurement of Input and Output
The WT3000 offers up to four input elements capable of simultaneous measurement
of single-phase input/three-phase output, or three-phase input/three-phase output.
• Accurate Measurement of Fundamental PWM Voltage
Motor drive technology has become more complex in recent years; pure sinewave-
modulated PWM is less common, and cases in which the voltage mean differs greatly
from the fundamental voltage waveform arise frequently. With the optional harmonic
measurement function of the WT3000, accurate measurements of commonly
measured values such as active power and the fundamental or harmonic
components can be taken simultaneously without changing measuring modes.
• Phase Voltage Measurement without a Neutral Line (/DT option)
With the delta computation function, an object under test without a neutral line can be
measured in a three-phase three-wire (3V3A) configuration, allowing calculation of
each phase voltage.
• High Frequency and Harmonic Measurements
(Requires the /G6 Option)
The fundamental frequencies of motors have become faster and faster. The WT3000
allows harmonic measurements of signals with fundamental frequencies as high as
2.6 kHz.
• Evaluation of Torque Speed Characteristics
(Requires motor version, the /CC Option)
Torque speed can be evaluated based on the torque and revolution speed data
measured with the motor version. Also, you can confirm the cycle-by-cycle voltage,
current, and power fluctuations that occur such as when starting the motor.
• Related applications
Power conversion technologies such as those used in EVs and power
conditioners
High-precision, simultaneous measurements are required in measuring
conversion efficiency in the conversion of a converter's three-phase input to a DC
bus, and the conversion from an inverter's DC bus to three-phase output.
Measurement of Inverter Efficiency
inverter motor load
input signal
output signal
torque
and
speed meter
trend display of torque and rpms
(requires motor version)
APPLICATIONS
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