1.1 Product Overview
11
The PW3336/ PW3337 is a power meter with power measurement capabilities for the full range of electrical
equipment, from single-phase devices such as battery-driven devices and household electronics to industrial-
use and three-phase electrical equipment.
The instrument provides coverage from DC to inverter frequencies with support for voltages up to 1,000 V and
direct-input currents of up to 65 A. It can also measure currents of up to 5,000 A using an optional current sensor.
• : These instruments provide two channels each of voltage
input and current input.
• : These instruments provide three channels each of voltage
input and current input.
• Since all channels are isolated, the instrument can simultaneously measure multiple circuits.
• It supports measurement lines from single-phase to 3-phase/4-wire.
• With 3-phase/3-wire measurement lines, the instrument can measure either voltage between lines (3V3A)
or phase voltage (3P3W3M) using vector calculations simply by switching its line setting (input terminal
connections remain the same).
• Accuracy is guaranteed for currents of up to 65 A with direct input.
• (The maximum input current is 70 A, ±100 Apeak.)
• An optional current sensor can be used to measure currents in excess of 65 A. (p.102)
• The instrument delivers a high fundamental accuracy of ±0.15% rdg. (at less than 50% of range, ±0.1% rdg.
±0.05% f.s.).
• Over a wide band from DC and 0.1 Hz to 100 kHz, the instrument covers not only the fundamental fre-
quency band for inverter-driven equipment, but also the carrier frequency band.
• Power factor effects are low at ±0.1% f.s. (with a internal circuit voltage/current phase difference of
±0.0573°), allowing high-accuracy measurement of active power during low power-factor operation, for
example during no-load testing of transformers and motors.
• The instrument can perform harmonic measurement in compliance with the IEC 61000-4-7:2002 interna-
tional standard on harmonic measurement methods.
• You can set an upper limit for the analyzed order from the 1st to 50th order according to the harmonic mea-
surement standard in use.
Overview Chapter 1
1.1 Product Overview
1.2 Features
Support for all power lines
Guaranteed accuracy up to 65 A with direct input
High-accuracy, wide-band performance
Standard harmonic measurement function complying with
IEC 61000-4-7:2002 (p.71)
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