GDPQ-300E Power Quality Analyzer
Meter detection functions
| No | Items | Description |
| 1 | Voltage/Current/Frequency | It can measure three-phase voltage, zero line voltage, three phase current, zero line current, frequency. Can display RMS, peak value, wave/peak ratio, waveform, Trend charts etc. |
| 2 | Harmonic wave measurement | It can measure fundamental wave of voltage and current and 2~50 times harmonics wave. The measurement results include harmonic efficiency, harmonic content, harmonic content, and total harmonic distortion (THD). Histograms and trends charts, etc. |
| 3 | Interharmonic measurement | It can measure 0.1 ~ 19.9 times interharmonics of voltage and current. The measurement results include the interharmonic components and the effective values of the subset, the interharmonic content rate etc. it can display histograms, trend charts, etc. |
| 4 | Power measure | It can measure three-phase four-wire/three-phase three-wire apparent power (electric energy), active power (electric energy), reactive power (electric energy), power factor etc., it can display trend charts; can measure demand of 1, 5, 10, 15, 30 60 minutes. |
| 5 | Three phase unbalance measure | It can measure three-phase four-wire / three-phase three-wire electrical system voltage and current positive sequence component, negative sequence component, zero sequence component, negative sequence imbalance degree, zero sequence imbalance degree; phase angle of three phase voltage and current , vector, trend charts. |
| 6 | Flicker | 1 minute flicker, 10 minute short flicker, 2 hour long flicker measurement |
| 7 | Voltage Swell / Dip / Interruption | Detects and logs voltage swells, sags and interruptions events. |
| 8 | Surge current | Detects and logs surge current events |
| 9 | Harmonic power | Can detect 2 ~ 30 times harmonic power, can display histogram, trend charts, etc. |
| 10 | Power wave | Can measure the rapid change of power (active, reactive, apparent power) according to the set time (1 ~ 5 minutes) |
| 11 | Transients | Can detect voltage transients longer than 20 microseconds |
| 8 | Monitoring record | It can record steady-state power quality parameters for a long time, including voltage / current / frequency, harmonics, power, three-phase imbalance, fluctuation / flicker, and the recording interval can be adjusted from 3 seconds to 30 minutes. |
| 9 | Digital oscilloscope | View voltage/current signal wave form |
Each accuracy index for detection functions
| Item | Measure range | Measure accuracy | Remark |
| Voltage/current /frequency | Three phase voltage: 1000V(effective value) Zero line voltage : 70V (effective value) Three phase current : 6000A(effective value,1000A current sensor for optional) Zero line current : 25A (effective value) Frequency: 40-70Hz | Voltage: 0.1%rdg ±0.05%f.s Current: 0.2%rdg ±0.05%f.s Frequency: reading±0.01Hz | Here,we use A phase voltage frequency as measure frequency |
| Harmonic wave measure | Voltage harmonic: THD+ Fundamental wave + 2-50times harmonic wave. Current harmonic: THD+ Fundamental wave + 2-50times harmonic wave. | Voltage harmonic wave: Uh≥1%UN，±5%Uh； Uh＜1%UN，±0.05%UN Current harmonic wave: Ih≥3%IN，±5%Ih； Ih＜3%IN，±0.15%IN | |
| Inter harmonic wave measure | Voltage harmonic: 0.1~19.9 times Inter harmonic wave . Current harmonic: 0.1~19.9 times Inter harmonic wave | Voltage Inter harmonic wave: Uih≥1%UN，5%Uih； Uih＜1%UN，0.05%UN； Current Inter harmonic wave: Iih≥3%IN，5%Iih； Iih＜3%IN，0.15%IN | |
| Power / Electric energy | Active power: 700kVA Reactive power: 700kVAR Power factor: 0.00~1.00 Active power energy: 10000kWh Apparent power energy: 10000kVAh Reactive power energy: 10000kVARh Average power factor: 0.00-1.00 | Active: reading±0.5% Apparent: reading±0.5% Reactive: reading±0.5% Power factor: reading±0.005 | |
| Three phase unbalance | Fundamental voltage: 1000V(effective value) Fundamental current: 6000A(effective value) Fundamental frequency: 40-70Hz Phase angle: 0-360degree Unbalance: 0.0%-100% | Voltage: 0.1%rdg ±0.05%f.s Current: 0.2%rdg ±0.05%f.s Frequency: reading±0.01Hz Phase angle: reading±0.3degree Voltage unbalance: reading±0.2% Current unbalance: reading±0.2% | Here,we use A phase voltage frequency as total measurement frequency |
| Voltage Flicker | 1 minutes flicker, short time flicker, long time flicker | 1 minutes flicker: ±5.5% 10 minutes short flicker: ±5% 2 hours long time flicker: ≤±5% | |
| Voltage swell, dip and interrupt | Monitor and record single-phase/multi-phase voltage swell, voltage dip and temporary power-off | Half-wave RMS, start time, duration, end time error ±10ms | Up to 40 event records |
| Surge Current | Monitor and record single-phase/multi-phase surge currents | Half-wave rms value, start time, duration, end time time error ±10ms | Stop measuring when capturing an event |
| Harmonic wave power | Total harmonic power times: 1~30th Harmonic total active power: ∑P Harmonic total reactive power: ∑Q Positive harmonic total active power: +∑P Negative harmonic total active power: -∑P Positive harmonic total reactive power: +∑Q Negative harmonic total reactive power: -∑Q | Harmonic power reading: ±0.5% | |
| Power wave | It can detect 1, 3, 5 minutes length of active, reactive, apparent half-wave power value, recording power change trend | Half-wave power reading: ±0.5% | |
| Transient | Voltage transients based on a nominal value of more than 120% | 1.the minimum period of measurable events is more than 20 microseconds 2. the probability of event capture 98.7% | 20 events can be stored in one measurement |
| Monitoring record | Record parameters include voltage, current, frequency, voltage/current harmonic wave(total harmonic+1-25 times harmonic), three-phase unbalance; active/reactive/apparent power, power factor; fluctuation/flicker | Data storage interval: 3s~30min The interval is 3s, and the total monitoring time is 16h; The interval is 30min, and the total monitoring time is 960h. | |
| Digital oscilloscope | Three phase voltage, three phase current, zero line voltage and zero line current instant wave form | Max. sampling frequency: 200kHz Min. sampling frequency: 100Hz |
Specification
● Voltage signal input loop:
Direct access, input impedance: 1MΩ, 20pF
Measure range: voltage effective value 1000V
Power consumption: less than 0.5VA/phase
● Current input loop:
Indirect access
Measure range: Current effective value 1A, 5A, 10A, 100A, 500A, 1000A, 3000A (select corresponding current sensor)
Power consumption: Less than 0.5VA/phase
● Measure signal frequency range: 40Hz-70Hz
● Display screen: 5.7 inch 640 *480 color LCD with touch screen
● Memory storage: 128M byte FLASH
● Outside storage port: USB ( plug in USB disk)
● Working power supply: Rechargeable Li-battery, 5-6hours working time for full charge
● Power supply: AC100-240V/DC 16.8V-1A power adapter/charger
