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SPS-351 Power Quality Standard Source (discontinued)

Signal: AC (3 phase)
Accuracy: Class 0.05
AC voltage output: 0-456V
AC current output: 0-12A
Harmonics order: 2nd~63rd
Offer sine of standard source level or various distortion signals. It supports qualitative and quantitative calibrating of various power quality analyzers, voltage monitor, flicker meter, power quality recorder. It also outputs 2nd ~63rd harmonics.


  • 8 inch color touch screen, interface friendly, easy to operate
  • Adopt advanced DSP data processing technology, can synthesize various irregular waveforms, such as harmonics, inter-harmonics, flicker, swells, dips, etc.
  • Equipped with RS232, Ethernet, and WiFi interface, SPS-351 can either support stand-alone operation, PC control or handy wireless terminal control
  • Communicate with tested meter thru RS-232/485 and Ethernet
  • Automatically calculate the error of meter and transducer, and the related data can be downloaded thru U-disk
  • Self-protection, alarming and displaying overload location for equipment output overload, Voltage short-circuit, Current open-circuit
  • Automatically detect, diagnose and alarm for failure
  • Remotely updating online, easily achieve software updating
  • Supports local calibration at users’ side

AC voltage output
Range: 50V, 100V, 220V
Adjustment range: (0~120) %RG, RG refers to range, similarly hereafter
Adjustment degree: 0.01%RG, 0.1%RG, 1%RG, 10%RG for option
Stability: 0.01%/2min
Distortion: ≤0.1% (Non-capacitive load)
Output maximum load: 25VA each phase
Accuracy: 0.05%RG

AC current output
Range: 1A, 2A, 5A, 10A
Adjustment range: (0~120) %RG, RG refers to range, similarly hereafter
Adjustment resolution: 0.01%RG, 0.1%RG, 1%RG, or 10%RG
Stability: 0.01%/2min
Distortion: ≤0.1% (Non-capacitive load)
Output maximum load: 25VA each phase
Measurement accuracy: 0.05%RG

Power output
Power output stability: 0.01%/2min
Active power and reactive power measurement accuracy: 0.05%RG

Phase angle output
Output adjustment range: 0°~360°
Output adjustment resolution: 10°, 1°, 0.1°, or 0.01°
Resolution: 0.01°
Accuracy: 0.05°

Power factor output
Adjustment range: -1.0000 ~ 0.0000 ~ +1.0000
Measurement resolution: 0.0001
Accuracy: 0.0005

Fundamental frequency output
Adjustment range: 40Hz ~70Hz
Output adjustment resolution: 1Hz, 0.1Hz, 0.01Hz, or 0.001Hz
Min resolution: 0.001Hz
Accuracy: 0.002 Hz.

Three phase voltage / current symmetry and phase angle symmetry
Voltage / current symmetry: ≤0.1%
Phase symmetry: 0.05°

Harmonic setting
Harmonic order: 2nd ~63rd 
Harmonic content: 0~40%
Harmonic phase angle: 0°~359.99°
Harmonic phase setup resolution: 0.01°
Harmonic voltage accuracy: when Uh≥1%Un, 2% Uh; when Uh<1%Un, 0.02% Un
Harmonic current accuracy: when Uh≥1%Un, 2% Uh; when Uh<1%Un, 0.02% Un

Inter-harmonics setting
Frequency range: 16Hz~9kHz
Frequency accuracy: 0.05%
Inter-harmonics frequency setup resolution: 0.1Hz
Inter-harmonics content: 0~30%
Inter-harmonics amplitude accuracy: 5%

Output flicker value (Pst)
Setup range: Setup the ±30% (60% ΔV/V) of voltage or current within the range
Pst indication accuracy (220V~240V or 115V~125V): 1%
Waveform: square wave, rectangular wave or sine wave
Duty ratio (when the wave is rectangular): 0.01 % ~ 99.99 %
Modulation frequency range: 0.0008Hz ~ 40Hz

Trigger input delay (start delay): 0~60s
Swell/dip duration (continue): 1ms~60s
Maximum amplitude dips (sudden changes to): 0%
Maximum amplitude swells (sudden changes to): 140%
Period of ramp in/ ramp out: 0.1ms ~30s
Trigger output delay: 0~60s

Energy error measurement
Active energy accuracy: 0.05%RD (PF≥0.5)
Reactive energy accuracy: 0.1%RD (PF≥0.5)

General parameters
Power supply:                90~265VAC,110VDC~370VDC
Frequency:                     50Hz~60Hz
Consumption:                 50VA~1000VA
Environment Condition:  20℃~30℃,relative humidity≤85%
Storage environment:    -20℃~50℃
Size:                               600 (L) × 440 (W) × 176 (H)
Weight:                           25Kg

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