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電力品質表計

PM2218

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電力測量單元PM2214 / 18的設計理念是提供高達0.2％的精確測量（標稱頻率/電壓高達0.05％），如三相電能和電力測量，具有事件記錄，電能品質分析，飄移和驟降， 和I / O功能可替代4/8組饋線轉換器。                                                                                                                             

PM2214 / 18是遠程監控公用事業/工業/建築/工廠自動化以及任何關鍵電能環境之下的低/高壓電力參數的理想元件。
PM2214 / 18不僅是一款節省成本的元件，而且對操作人員的幫助也很高，可以很好地監測電力品質狀況，提高設備壽命和生產率

提供高達0.2％的精確測量（標稱頻率/電壓高達0.05％），如三相電能和電力測量，具有事件記錄，電能品質分析，飄移和驟降， 和I / O功能可替代4/8組饋線轉換器。

特色

  • 電力監視/SCADA系統
  • 饋線自動化/客製化
  • 精確度達到0.05%
  • 用於8個饋線轉換器可節省成本
  • 電力品質分析符合 IEC 61000-4-30標準
  • 1個週期內快速即時執行數據轉換

Accuracy

  • 1. Unit configuration
    • 1-1 Processing and interface
      • CPU 32 bits
      • omports Main : RS-485 / option : LAN – RJ45
      • Diagnostic : RS-232
      • Protocol Modbus RTU
    • 1-2 Inputs Software setup Detection ( * vector composed)
      • Voltages / main bus 3U – 3 phase 4 wires Va, Vb, Vc, *V0 ;  *Vab, *Vbc, *Vca
      • 3U – 3 phase 3 wires *Va, *Vb, *Vc ;  Vab, Vbc, *Vca
      • Currents / 8 feeders 3I / Ia, Ib, Ic Ia, Ib, Ic, *I0 
      • 2I / Ia, Ic Ia, *Ib, Ic
      • Input setup and wiring 3P4W 3CT / 3U24I
      • 3P3W 3CT / 3U24I
      • 3P3W 2CT / 3U16I
      • Conversion 3 elements P, Q (P1, P2, P3, Q1, Q2, Q3)
      • ADC 16 bits with 16 synchronized channels
      • Rate of real data conversion, 1-32 cycle adjustable
    • 1-3 Power quality analysis (option) IEC 61000-4-30
      • Harmonic analysis
      • Voltage dips
      • Voltage unbalance (negative and zero sequence)
      • Voltage flicker △V10
      • Voltage low frequency spectrum (0.5-5Hz)
    • 1-4 Waveform recording (option) Ring buffer, length of 16 cycles total 1728 samples / three phase phasor
      • AC waveform 36 samples / cycle
      • Trend of speedy real rms datas 36 samples / cycle
      • 9 three phase phasors maximum
  • 2. Input ranges
    • Voltages Frequency : 45 – 65 Hz
    • 10 – 300V phase to neutral
    • Maximum over ≦1000Vrms, 2 seconds
    • Input resistance ≧1MΩ
    • Currents CT 5A ( 0 ~ 6A ) or CT 1A ( 0 ~ 1.2A )
    • Maximum over
    • 3 x CT continuous : ≦25 x CT, 2 seconds : ≦50 x CT, 1 seconds
    • Burden ≦0.1VA for 1 x CT input
  • 3. Measured parameters 
    • 3-1 Normal parameters 25±5℃
      • Stability
      • ≦ 50PPM (-10~50℃) , ≦ 70PPM (-30~70℃)
      • System frequency (Hz) ◎ 0.05% of nominal frequency
      • Voltage (RMS) ◎ 0.05% of nominal voltage
      • Voltages phase to neutral, phase and Σ
      • Voltages phase to phase, line and Σ
      • Current (RMS) ◎ 0.05% of nominal CT, Ia, Ib, Ic and Σ
      • Active power (W) ◎ 0.2% of (nominal voltage x CT), phase and Σ
      • Reactive power (Var) ◎ 0.2% of (nominal voltage x CT), phase and Σ
      • Active energy (WH) ◎ 0.2% of (Equate to Active Power), Σ each Feeder 
      • Reactive energy (VarH) ◎ 0.2% of (Equate to Reactive Power) , Σ each Feeder 
      • Power factor (PF) ◎ 0.2% (each phase and Feeder)
      • Phase angle ◎ 0.5° for A-V (each phase)
      • Phase rotation ◎ Auto-detection
    • 3-2 Power quality parameters
      • Sequence (voltage) ◎ 0.2% of nominal voltage
      • Positive sequence
      • Negative sequence
      • Zero sequence
      • Voltage unbalance ◎ 0.2% of positive sequence voltage
      • Zero sequence unbalance (%)
      • Negative sequence unbalance (%)
      • Distortion in harmonics Analysis in Va, Vb, Vc, Ia, Ib, Ic
      • Analysis with fundamental and 2nd to 17th
      • Distortion, HD-F and THD-F
      • Voltage flicker  △V10 (%)
      • Spectrum of low frequency  0.5 – 1 – 2 – 3 – 4 – 5 Hz
      • Voltage dips Pick up with time inversed curve
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