AEMC News - PowerPad III Model 8333

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AEMC PowerPad III 8333

AEMC is proud to announce that PowerPad III Power Quality Analyzer Model 8333 was picked as a 2014 Product of the Year Winner by Utility Products Magazine.

The AEMC PowerPad III 8333 is a three-phase power quality analyzer that is easy-to-use, compact, and shock-resistant. The AEMC 8333 enables technicians and engineers to measure and carry out diagnostics and power quality work on single or three-phase networks. Three current and four voltage input terminals are provided. Additionally, the AEMC PowerPad III 8333 is IEC 61000-4-30 Class B and safety rated to 600V CAT IV.

The instrument has memory available for storing trend data, alarms, transients, and snapshot data. The user can store on the AEMC PowerPad III 8333 up to 12 screen snapshots, up to 51 captured transients that contain four cycles for each active input, and 4,000 alarm events from up to 10 different parameters. Trend data can also be recorded for days, weeks, or even months.

The PowerPad III Model 8333 is a 3-phase network analyzer with a color graphic display and a built-in rechargeable battery. This instrument can be used for:

  • Measuring the RMS values, powers, and perturbations on electric distribution networks;
  • Delivering snapshots of the principal characteristics of a 3-phase network;
  • Tracking the variations of various parameters over time.

The measurement accuracy of the instrument is better than 1% (not counting the accuracy due to the current sensors). The instrument is also very flexible, with a choice of sensors allowing measurements ranging from a few milliamperes (MN193) to several kiloamperes (AmpFlex). The Model 8333 is compact and impact-resistant; its ergonomics and simple interface make it easy to use. The instrument is intended for technicians and engineers responsible for electrical installation and network inspection and maintenance.

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The Model 8333 principal measurements are:

  • The RMS values one voltage up to 1000V between terminals. By using ratios, the instrument can measure voltages up to hundreds of gigavolts.
  • The RMS values of AC currents up to 10.000 amperes (excluding neutral current). By using ratios, the instrument can measure currents up to hundreds of kiloamperes.
  • The DC components of voltages and currents (excluding neutral current).
  • Minimum and maximum half-cycle RMS voltage and current values (excluding neutral current).
  • Peak voltage and current values (excluding neutral current).
  • The frequency of 50Hz and 60Hz networks.
  • Current and voltage peak factors (excluding neutral current).
  • Calculation of the harmonic loss factor (HLF), application to transformers in the presence of harmonic currents.
  • Calculation of the K factor (KF), application to transformers in the presence of harmonic currents.
  • Measurement of total harmonic distortion concerning the fundamental (THD in %f) of the current and voltages (excluding neutral current).
  • Measurement of the total harmonic distortion concerning the RMS AC value (THD in %r) for the current and voltages (excluding neutral current).
  • Active, reactive (capacitive and inductive), non-active, distortion, and apparent power, by phase and cumulative (excluding neutral current).
  • Power factor (PF) and displacement factor (DPF or cos Ф) (excluding neutral current).
  • Measurement of the RMS distortion value (d) for the current and the voltages (excluding neutral current).
  • Short-term voltage ?icker (PST) (excluding neutral current).
  • Active, reactive (capacitive and inductive), non-active, distortion, and apparent energy (excluding neutral current).
  • Current and voltage harmonics (excluding neutral) up to order 50: RMS value, the percentage referred to the fundamental, (%of) (excluding neutral current), or the total RMS value (%r), minimum and maximum, as well as sequence harmonics.
  • Apparent harmonic power up to order 50 (excluding neutral current): percentages referred to the fundamental apparent power (%f) or the total apparent power (%r), minimum and maximum of a rank.
  • Calculation of the RMS neutral current from the currents measured on the phases of a three-phase system.


  • Waveforms (voltages and currents)
  • Frequency Bar Chart (voltages and currents - excluding neutral current)
  • Screen Captures (12 maximum)
  • Transients Function: Detection and recording of transients (up to 51) between the user-de?ned start and stop dates and times. Recording of four complete cycles (one before the triggering event and three after) on the six acquisition channels.
  • Trend Recording (data logging) Function: SD-card with date-stamping and user-de?ned start and stop dates for recording, with a maximum of 100 recording sessions. Display, in bar chart or graph form, of the means of many parameters vs. time, with or without minima and maxima.
  • Alarm Function: List recorded alarms (up to 4662) exceeding thresholds de?ned in the con?guration menu. User-de?ned alarm monitoring starts and stops times.


  • Date and time setting
  • Screen brightness setting
  • Graph colors
  • Display management
  • Night mode
  • Calculation methods (non-active quantities broken down or not, choice of the unit of energy, choice of the coef?cients of calculation of the K factor, choice of reference for the level of harmonics
  • Distribution system (single-phase, 2-phase, 3-phase) and of the connection method (standard, 2-element method or 2½ -element method)
  • Con?gure recording, alarms, and transients
  • Delete data (total or partial)
  • Display software and hardware version numbers
  • Language
  • Current sensors detected, not detected, not managed, simulated, or impossible to simulate (2-element connection method). Set voltage and current ratio, transduction ratios, and sensitivity


AEMC PowerPad III scheme

  1. Over-molded protective case.
  2. Color TFT 320 X 240 (1/4 OFT) display with the graphic representation of system parameters and measurements.
  3. Six (6) function buttons, used to modify the display mode.
  4. Four (4) function buttons.
  5. ON /OFF button.
  6. Three (3) current input terminals on the top of the instrument to enable the use of current sensors (MN, SR, AmpFlex, MiniFlex, MR, SL, and J93 probes). It is possible to use different current probes per input voltage ratio selectable. Four (4) voltage input terminals (voltage ratio can be set before recording).
  7. USB optically isolated output for con?guring, running tests, and transferring data to a PC.
  8. Input for external power supply and battery charging.
  9. Enter button.
  10. Four (4) buttons that enable movement of the cursor, browsing, or the selection of data.
  11. Buttons for directly accessing the 6 display modes.

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