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PQube Power Quality Analyzer
- Lost cost PQ and Power/Energy meter
- Lab-grade energy recording
- 256-sample-per-cycle power quality
- Open-Source files on 2-year SD card – Optional Ethernet
- All with no software required
Part Number:
PSL PQube 02
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The PQube power quality analyzer is a tiny, user-friendly power quality recorder with built-in power, energy, and carbon emissions monitoring. With the PQube, there is no software required - all recorded data is written directly onto an SD memory card in a number of ready-to-use formats including HTML web pages, spreadsheets (Excel-compatible CSV files), pictures (GIF images, eg for power/energy trends and waveforms on power quality events), text, XML and PQDIF (the IEEE standard for power quality data files.)
Key Features
Additional Modules
There are a number of additional plug-in modules available for the PQube that increase it's capabilities.
What's Included:
Key Features
- Three-phase and single-phase monitoring up to 690V, 50/60/400Hz.
- Auto power configuration (patent pending).
- Power Quality monitoring: “Your PQube is like the black box on an aircraft: if anything goes wrong with the power, it records all the details.”
- Voltage dips, swells, and interruptions – waveforms and RMS graphs.
- Over-frequency and under-frequency events.
- 1-microsecond high-frequency impulse detection.
- THD, TDD, and time-triggered snapshots.
- Voltage and current unbalance.
- RMS Flicker – Pinst, PST, PLT.
- Detailed event recording, plus daily, weekly, monthly trends. Cumulative probability, histograms, and more.
- Energy monitoring: “The most accurate little monitor on the market. Complete energy information.”
- Watts, VA, VAR’s, true Power Factor, Watt-hours, VA-hours.
- Daily and accumulated CO2, and CO2 rate (patent pending).
- Peaks: single-cycle peak, 1-minute, and 15-minute averages.
- CT ratios support up to 50,000 amps . PT ratios support up to 6,900,000 volts.
- Daily, weekly, monthly trends. Load duration curves and more.
- No software required! The PQube automatically writes these files on a standard digital camera SD card:
- Spreadsheets: CSV Excel®-compatible files; events, trends, statistics.
- Pictures: Event and trend/statistics graphs – dual-language picture graphs output directly from PQube in typical GIF format
- PQDIF (beta): the IEEE’s standard for power quality data files.
- Text, XML, and HTML summaries: perfect for interfacing with other programs.
- Easy data retrieval:
- Sneakernet: Pop out SD card, just like a digital camera, and copy files to your PC.
- Ethernet:
- Email for easy approval by IT department. Automatically sends you events, trends, and statistics in the language of your choice.
- Built-in web server – retrieve meters, files, and more.
- FTP server for easy file transfer (beta).
- Modbus-TCP (beta).
- Additional channels: two analog inputs, one digital input, one relay output, and two temperature-humidity monitoring channels.
- 256 samples-per-cycle measurements on all channels.
- About 1 gigabyte per year of data. PQube comes standard with 2-gigabyte SD-card for data storage. Can use 8-gigabyte SD cards.
- Full color display. 25+ languages, date/time setup, recent events, meters, and more.
- DIN-rail or panel mount.
- Built-in Li-Ion UPS. Power from 24 VAC, 24-48VDC, or optional 100~240 VAC power supply.
- FREE individual NIST calibration certificate for every PQube!
Additional Modules
There are a number of additional plug-in modules available for the PQube that increase it's capabilities.
 | PS1 AC Power Supply - enables the PQube to be powered by 100~240V AC power |
 | XCT4 Current Transformer Module - enables the PQube to monitor current so that power quality events on current can be detected. Also enables power/energy parameters to be measured. Choose this module where external 5A CTs are to be used. |
 | CT4 Current Sensing Module - enables the PQube to monitor current so that power quality events on current can be detected.Choose this module where 5A secondary CTs are already installed. |
 | ETH1 Ethernet Module - enables network communications (LAN/WAN/Internet) are required for remote access to the meter. Includes built-in automated emails, web server and FTP server. |
 | TH1 Temperature & Humidity Module - enables up to two channels of temperature/RH to be monitored |
What's Included:
- 1 x 4GB SanDisk SD memory card
The Good:
The Bad:
The Bottom Line:
The Bad:
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Full Review
| Inputs | |
| Mains Voltage Measuring Channels | |
| Connection | L1, L2, L3, N PQube screw terminals [9], [11], [13], [15] |
| Frequency Range | 40Hz~70Hz and 320Hz ~ 560Hz. Nominal 50Hz, 60Hz, or 400 Hz auto, 320-560Hz manually selected |
| Mains Configuration | Single-phase, delta, wye or star. User selected or auto-selected |
| Range of Nominal Input Voltage | 100VAC~690VAC L-L (69VAC~400VAC L-N) User selected or auto-selected |
| Measurement Channels | Line-to-Neutral, Line-to-Line, Neutral-to-Earth |
| Sampling Rate | 256 samples per cycle, phase-locked to input frequency |
| Measurement range | 0 VAC ~ 900 VAC L-L (520 VAC L-N) |
| Accuracy | ±0.05% rdg ±0.05% FS typical (10% ~ 150% of nominal). Every PQube factory tested at better than ±0.04%rdg ±0.04%FS. Note: FS is based on measurement range. |
| RMS measurement method | True single-cycle RMS, phase-locked to each channel, updated every 1/2 cycle. URMS˝ per IEC 61000-4-30 Class A. Also 10/12 cycle true-RMS per IEC 61000-4-30 Class A. |
| HF Impulse detection | L1-E, L2-E, L3-E. ±450Vpk nominal threshold detected through 2-pole high-pass 4.8 kHz nominal filter. Every PQube factory tested with 1-µsecond 10%-to-90% impulses; trigger required at ±650Vpk, must not trigger ±250Vpk. |
| Unbalance - voltage | Measurement method ANSI C84.1. Range: 0.0% - 100.0% Accuracy: ±0.1%. |
| THD - voltage | Measurement method: Discrete Fourier Transform of phase-locked 256-samples-per cycle. Range: 0.0% - 100.0% Accuracy: ±0.2% at test waveform having typical harmonic content (5% 5th, 2.5% 7th, 1.5% 9th, and 1% 11th). Samples measured through 6-pole low-pass analog anti-alias filter, 3 dB frequency 4.7 kHz. |
| RMS Flicker | Pinst – average absolute difference between URMS˝ and 1-second RMS, in percent of nominal, multiplied by scaling factor for improved compatibility with Incandescent Flicker in IEC 61000-4-15. PST – mean value of Pinst over previous 10 minutes, synchronized to real-time clock. PLT – mean value of Pinst over previous 2 hours, synchronized to real-time clock. Range 0.0 ~ 20.0 . Accuracy ±0.1. |
| Isolation | PQube provides more than 7500 VDC isolation to Earth. UL/IEC 61010 reinforced insulation. |
| PT Input Ratio Range | 1:1 to 10000:1 |
| Installation category | CAT IV UL/IEC 61010 for voltages up to 300VAC L-N (equivalent to 480VAC L-L), CAT III for higher voltages. Pollution Degree 2 |
| Analog Input Channels | |
| Connection | AN1, AN2 PQube screw terminals [22], [30] |
| Nominal Input | 0~30VAC or ±60VDC (to Earth) max |
| Full Scale | 70VAC, ±100VDC |
| Measurement Channels | AN1-Earth, AN2-Earth, AN1-AN2 |
| User-specified Input Ratio | 1:1 to 10000:1 |
| Sampling Rate | 12.8kHz or 15.4kHz (measured at same rate as mains voltage measuring channels) |
| Accuracy | ±0.2% rdg ±0.2% FS typical (10% ~ 100% FS). Every PQube factory tested at better than ±0.1% rdg ±0.1% FS AC. |
| Digital Input | |
| Connection | DIG1 PQube screw terminal [24] |
| Rating | 60VDC to Earth |
| Wetting | 5.4VDC at 3µA |
| Threshold | 1.5V±0.2V with respect to PQube's Earth terminal, with 0.3V hysteresis typical |
| Sampling Rate | 12.8kHz or 15.4kHz (sampled at same rate as mains voltage measuring channels) |
| Frequency Measurement | |
| Range | 40Hz to 70Hz and 320Hz to 560Hz |
| Accuracy | ±0.01Hz, steady state |
| Method | Cycle-by-cycle zero-crossing detection on L1-E or L2-E (auto-selected). Firmware phase-locked for frequency slew rate up to 5 Hz/sec. For 50/60 Hz, measured through an 9-pole low-pass analog filter, 3 dB frequency 76 Hz. For 400 Hz, measured through 7-pole low-pass filter, 3 dB frequency 1 kHz. Poles and 3 dB frequency are auto-selected based on nominal frequency. |
| Optional Current Measuring Modules | |
| CT4 | |
| Measurement Type | Pass-through (built-in current transformers) |
| Accuracy | ±0.2% rdg ±0.2% FS typical (10% ~ 120% FS). Every PQube factory tested at better than ±0.15% rdg ±0.15% FS. |
| Burden | less than 0.1VA |
| Conductors | 0.34 inches (8,6mm) max. diameter, 600V UL-recognized insulation required |
| XCT4 | |
| Measurement Type | External current transformer |
| CT input ratio range | 1:1 to 10000:1 |
| Accuracy - excluding external CT's | ±0.2% rdg ±0.2% FS typical (10% ~ 120% FS). Every PQube factory tested at better than ±0.15% rdg ±0.15% FS. |
| Burden | Less than 0.1VA |
| Wire connection | Min. 20AWG (0,52 mm2), Max. 14AWG (2.1mm2). 600V UL- recognized insulation required |
| XCT4-0.333V-00, XCT4-1V-00, XCT4-5V-00, and XCT4-10V-00 | |
| Measurement Type | External current transformer |
| CT input ratio range | 1:1 to 10000:1 |
| Nominal | 0.333V RMS, 1V RMS, 5V RMS, and 10V RMS |
| Crest Factor | 3.5 (± 1.17V peak, 3.5V peak, 17.5V peak, and 35V peak) |
| Sampling Rate | 12.8kHz or 15.4kHz (measured at same rate as mains voltage measuring channels) |
| Accuracy - excluding external CT's | ±0.2% rdg ±0.2% FS typical (10% ~ 120% FS). Every PQube factory tested at better than ±0.1% rdg ±0.1% FS. |
| Wire connection | Min. 20AWG (0,52 mm2), Max. 14AWG (2,1mm2). 600V UL- recognized insulation required |
| Max screw torque | 5 inch-pounds (0,6Nm) |
| Instrument Power | |
| Screw Terminals | (AC or DC) PQube POWER screw terminals [23], [31] |
| AC Input | 24VAC ± 20% 50/60 Hz |
| DC Input | 24-48VDC ± 20% (polarity independent) |
| Power Required | 5VA max |
| Internal UPS | |
| Type | Lithium Polymer Battery (replacement batteries available from PSL) |
| Capacity | 600mAH (30 minutes typical with new, fully-charged battery) |
| Backup period | User controlled. 1 to 10 minutes, 3 minute default. |
| Optional PS1 Plug-in Module | |
| AC Input | 100~240VAC ± 10%. 50/60 Hz |
| Power Required | 25VA max |
| Isolation | Module provides more than 3200VDC isolation to all other circuits |
| Power measurements | |
| Definitions | |
| Watts (power) | Sum of true instantaneous per-phase power |
| Volt-Amps (apparent power) | Sum of per-phase product of RMS voltage and RMS current, taken over the measurement interval |
| Power Factor (tPF) | True power factor – ratio of Watts to Volt-Amps. |
| VAR’s (volt-amps reactive) | Budeanu definition |
| Carbon (CO2 rate and accumulated) | Based on patent-pending algorithm using watts and user-selected proportions of generator sources, and user-supplied carbon generation rates for each source. |
| Current unbalance | Measurement method ANSI C84.1. |
| Accuracy excluding external CT’s | |
| Watts (power) | ±0.2% at unity power factor, nominal voltage, 20% ~ 100% FS current. Class 0.5 ANSI C12.20-1998. Better than ±0.25% rdg ±0.25% FS (10% ~ 120% FS), for phase angle Θfundamental = ±30° (angle between fundamental voltage and fundamental current). Accuracy calculation: sum of voltage accuracy, plus current accuracy, plus phase angle correction which is guaranteed less than ±0.025% x (1 / cos(Θfundamental)). |
| Volt-Amps (apparent power) | Better than ±0.25% rdg ±0.25% FS typical (10% ~ 120% FS) |
| Measurement interval | |
| Measurement interval | Phase-locked, 10-cycles (50 Hz nominal) or 12-cycles (60 Hz nominal). Approximately 5 readings per second. Actual readings per second dependent on actual frequency. |
| Operating Environment | |
| Ambient Conditions – Operating | -20°C ~ 50°C, 10%~90% RH |
| Transient Voltages - 100kHz ring wave | 6 kV pk, IEC 61180, IEC 61000-4-5. Applied to voltage measuring terminals with Performance Evaluation Class 1. (When applied to optional power supply mains terminal, supply’s fuse may operate in PE Class 3 at test levels greater than 4 kV.) |
| EFT Burst Immunity | 4 kV pk, IEC 61000-4-4, Performance Evaluation Class 1. Applied to power measuring terminals and optional PS1 power supply mains terminals |
| RF Field Strength Immunity | 3V / m, IEC 61000-4-3 Test Level 2 |
| Magnetic Field Strength Immunity | 30A / m, IEC 61000-4-8 Test Level 4 |
| Ingress Protection Rating (IP Rating) | IP20H, IEC 60529 |
| Agency Approvals and Listings | |
| UL (Underwriters Laboratories) | UL-recognized, cULus – File Number E220936 |
| RoHS | Certified – PSL Construction File PQube-001 |
| CE | Certified – PSL Construction File PQube-001, TUV CB Test Certificate US-TUVR-4368-A2 |
| EMC | Certified – 20080102-01-CE, 20080326-01-RI |
| TUV Bauart-mark | Certified – TUV Report 30880881.009 |
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Popularity: 58.80%
Customer Ratings: 
5.0 of 5 (1 reviews)
5.0 of 5 (1 reviews)
Recommended: YES: 1 | NO: 0
PQube tells all
Unicorner RECOMMENDS THIS PRODUCT
October 12, 2009
The Good:
LOTS of useful info
The Bad:
Haven't found any
The Bottom Line:
Highly recommend if you suspect supply line problems (or even if you don't)
LOTS of useful info
The Bad:
Haven't found any
The Bottom Line:
Highly recommend if you suspect supply line problems (or even if you don't)
