PSL PQube - PQube Specifications

PQube User Manual 2.1
Page 66 of 113
PQube Specifications
PQube Specifications Version 2.0
Reference conditions for factory tests: 19~25°C, 15%~50% RH, steady-state 10/12 cycle signals. ±1/2 display count on all accuracies
MAINS VOLTAGE MEASURING CHANNELS
Connection
L1, L2, L3, N PQube screw terminals [9], [11], [13], [15]
Frequency Range
40 Hz ~ 70 Hz and 320 Hz ~ 560 Hz. Nominal 50 Hz, 60 Hz, or 400 Hz auto, 320-560 Hz manually
selected.
Specifications below apply at 50/60 Hz.
Mains Configuration
Single-phase, split-phase, delta, wye or star. User selected or auto-selected.
Range of Nominal Input Voltage
100 VAC ~ 690 VAC L-L (69 VAC ~ 400 VAC 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). Factory tested at better than ±0.04% rdg ±0.04%
FS. Note: FS = 345 VAC or 520 VAC, selected based on nominal line-to-earth voltage.
RMS Measurement Method
True single-cycle RMS, phase-locked to each channel, updated every cycle or every 1/2 cycle. U
RMS½
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. ±450 Vpk nominal threshold detected through 2-pole high-pass 4.8 kHz nominal filter.
Every PQube factory tested with 1-µsec 10%-to-90% impulses; trigger required at ±650 Vpk, must not
trigger at ±250 Vpk.
Unbalance – Voltage
Measurement method: ANSI C84.1, IEC, and GB. Range: 0.0% ~ 100.0%. Accuracy equivalent to RMS
voltage specification applied to measurement method. Supports ANSI, GB, IEC (positive and negative
sequence*).
THD – Voltage
Measurement method: DFT of phase-locked 256 samples-per-cycle. Range: 0.0% ~ 100.0%. Accuracy:
±0.2% at 60-Hz test waveform having typical harmonic content (5% 5th, 2.5% 7th, 1.5% 9th, and 1%
11th)
Flicker
±5% rdg at all reference points on the eye-response curve defined in IEC 61000-4-15 for P
ST
≥1.
Harmonics and Interharmonics
Range: 0% ~ 100% of fundamental, measured up to the 63rd order (harmonics displayed up to the 50th
order).
Harmonic accuracy
IEC 61000-4-7:2002 Class II, typical, up to the 50th order, for units manufactured after February 2010.
(Preliminary specification, subject to further evaluation)
Isolation
PQube provides more than 7500 VDC isolation to Earth. UL/IEC 61010 reinforced insulation.
PT Input Ratio Range
1:1 to 10000
Installation Category
CAT IV UL/IEC 61010 for voltages up to 300 VAC L-N (equivalent to 480 VAC L-L), CAT III for higher
voltages. Pollution degree 2.
ANALOG INPUT CHANNELS
Connection
AN1, AN2 PQube screw terminals [22], [30
Nominal Input
High range: 0 ~ 30 VAC or ±60 VDC to Earth max. Low range: 0 ~ 7VAC or ±10VDC to Earth max.
Input impedance
800 kΩ to Earth
Full Scale
High range: 70 VAC, ±100 VDC, Low range 7 VAC, ±10 VDC.
Measurement Channels
Standard: AN1-Earth, AN2-Earth, AN1-AN2. DC Energy Mode: DC Power and DC Energy.
Accuracy
±0.2% rdg ±0.2% FS typical (10% ~ 100% FS), ANx-Earth. Every PQube factory tested at better than
±0.1% rdg ±0.1% FS AC
DIGITAL INPUT
Connection
DIG1 PQube screw terminal [24]
Rating
60 VDC to Earth
Wetting
5.4 VDC at 3 µA
Threshold
1.5 V ±0.2 V with respect to PQube’s Earth terminal, with 0.3 V hysteresis typical.
Sampling Rate
12.8 kHz or 15.4 kHz (sampled at same rate as mains voltage measuring channels.
FREQUENCY MEASUREMENT
Range
40 Hz to 70 Hz and 320 Hz to 560 Hz.
Accuracy
±0.01 Hz, 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 a 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.