AEMC 3945 Three-Phase Power Quality Analyzer PowerPad

The AEMC 3945 Power Quality Analyzer has full color graphical display lets you see and analyze volts, amps and harmonic content in real time and take pictures to document and analyze clearly. Its high speed sample rate, at 256 samples per cycle, provides excellent fidelity in reproducing waveforms and capturing transients that happen as fast as 62.5µs.

The AEMC 3945 PowerPadﾒs 4MB of memory is conveniently partitioned to let you store four different types of data, synchronized or independent of each other. You can store up to 12 screen snapshots, up to 50 captured transients that contain four cycles for each active input, and 4096 alarm events. You can also record trend data for days, weeks or even months.

Features

• True RMS single-, two- and three-phase measurements at 256 samples/cycle, plus DC
• Real-time color waveforms
• Easy-to-use on-screen setup
• True RMS voltage and current measurements
• Measures DC volts, amps and power
• Display and capture voltage, current and harmonics to the 50th order, including direction in real time
• Phasor Diagram Display
• VA, VAR and W per phase and total
• KVAh, VARh and kWh
• Neutral current display for three-phase
• Transformer K-factor display
• Power Factor displacement PF display
• Captures up to 50 transients
• Short-term flicker display
• Phase unbalance (current and voltage)
• Harmonic Distortion (total and individual)

Six direct access function buttons quickly let you see:


Waveforms ﾖ Display Volts, Amps, THD and Crest Factor by phase or for all phases. You can display all the voltage inputs on one screen, phase-to-phase or phase-to-neutral. Real-time phasor diagrams can be displayed for volts and amps, also by phase or for all phases.

Harmonics ﾖ Display Harmonics out to the 50 th for Volts, Amps and VA. Individual Harmonics are displayed as a percentage and in real value. Harmonic direction and sequencing can also be displayed.

Transients ﾖ Set, capture and display transients. You select the threshold and the number of transients to capture. PowerPad then captures four waveforms for each transient; the triggering waveform as well as one pre- and two post-triggered waveforms. As many as 1200 waveforms can be captured.

Alarms ﾖ Configure, capture and display up to 4096 alarm events based on up to ten different trigger variables. Each captured alarm event will show the phase, the variable and the value as well as the time and duration.

Record ﾖ Set up and record trend data at selectable rates from one sample/second to one sample every 15 minutes on as many as 22 different variables for all phases. See the recorded data on screen, zoom in and out and scroll the time axis to analyze the data.

Power & Energy ﾖ Display Watts, VARs and VA by phase and total. Accumulate totals and see whether the energy is inductive or capacitive.


Applications

• Verification of power distribution circuits
• Measurement and recording of power system quality (kW, VA, VAR)
• Energy metering (kVAh, VARh, kWh)
• In plant troubleshooting of power distribution panels and individual machinery
• Monitor pad mount transformers
• Determine harmonic problems originating from source or load
• Monitor phase balances
• Determine transformer K-factor
• And much, much more

Specifications
 

MODEL	3945
ELECTRICAL
Sampling Frequency	256 samples per cycle
Data Storage	4MB partitioned for waveforms, transients, alarms and trend recording
Voltage (TRMS)	Phase-to-Phase: 960V      Phase-to-Neutral: 480V
Current (TRMS)	MN Clamp: 0 to 6A/120A or 0 to 240A      SR Clamp: 0 to 1200A MR Clamp: 0 to 1200AAC, 0 to 1400        ADC AmpFlex: 0 to 6500A
MEASUREMENT	RANGE	RESOLUTION	ACCURACY
Single-Phase RMS Voltages	15 to 480V	0.1V	±0.5% ± 2cts
Phase-to-Phase RMS Voltages	15 to 960V	0.1V	±0.5% ± 2cts
DC Voltage Component	15 to 680V	0.1V	±1% ± 2cts
Single-Phase Peak Voltages	15 to 680V	1V	±(1% + 5cts)
Phase-to-Phase Peak Voltages	15 to 1360V	1V	±(1% + 5cts)
Frequency (Hz)	40 to 69Hz	0.01Hz	±0.01Hz
Current Probes (Arms) MN Clamp SR Clamp AmpFlex Probe	0 to 240A  0 to 1200A 10 to 6500A	0.1A 0.1A; 1A = 1000A 0.1A; 1A = 1000A	±(0.5% + 2cts)   ±(0.5% + 2cts) ±(0.5% + 1A)
Active (Real) Power (kW)	0 to 9999kW	4 digits (10,000ct)	±1% ± 1ct @ PF =0.8
Reactive Power (kVAR)	0 to 9999kVAR	4 digits (10,000ct)	±1% ± 1ct @ PF =0.8
Apparent Power (kVA)	0 to 9999kVA	4 digits (10,000ct)	±1% ± 1ct
Power Factor (PF & DPF)	-1.000 to 1.000	0.001	±(1.5% + 0.01)
Active Energy (kWh)	0 to 9999MWh	4 digits (10,000ct)	±1% ± 1ct @ PF =0.8
Reactive Energy (kVARh)	0 to 9999MVARh	4 digits (10,000ct)	±1% ± 1ct @ PF =0.8
Apparent Energy (kVAh)	0 to 9999MVAh	4 digits (10,000ct)	±1% ± 1ct
Unbalance (V & A)	0 to 100%	0.1% ±1%	± 1ct
Phase Angle (VﾖA, AﾖA, VﾖV))	-179° to +180°	1°	±2°± 1ct
Harmonics (1 to 50) F = 40 to 69Hz (V = 50V, A > Inom/100)	0 to 999%	0.1%	±1% + 5cts
Total Harmonic Distortion (V & A)	0 to 999%	0.1%	±1% + 5cts
K-factor (Akf)	1 to 99.99	0.01	±5% ± 1ct
Flicker (PST)	0.00 to 9.99	0.01	--
Power Source	9.6V NiMH rechargeable battery pack AC supply: 110/230VAC ±20% (50/60Hz)
Battery Life	=8 hrs with display on; =35 hrs with display off (record mode)
MECHANICAL
Dimensions	9.5 x 7 x 2" (240 x 180 x 55mm)
Weight	4.6 lbs (2.1kg)
DISPLAY
Display Type	1/4 VGA (320 x 240) color LCD
ENVIRONMENTAL
Operating Temperature	32° to 122°F (0° to 50°C)
Storage Temperature	-4° to +122°F (-20° to +50°C)
SAFETY
Safety Rating	EN 61010-1, 600V Cat. III, Pollution Degree 2
Double Insulation	Yes
CE Mark	Yes

For full AEMC 3945 PowerPad specifications, please click here: AEMC 3945 PowerPad

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