Eaton Power Xpert PXM 4000, Руководство пользователя и инструкция по установке

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IM02601004E
Page 13
1 Introduction
Voltage Unbalance = V2/V1 * 100%
Current Unbalance = I2/I1 * 100%
Note that V1, V2, I1 and I2 are symmetrical component values that should not be con-
fused with Va, Vb, Ia, Ib, or with similarly labeled input terminals on the meter.
1.6. Feature Comparison between Power Xpert Meter Models
FEATURE PXM4000 PXM6000 PXM8000
Trend logging
• • •
Load Profile
• • •
Event logging
• • •
MEMORY & STORAGE
2 GB Standard Memory
•
4 GB Standard Memory
•
8 GB Standard Memory
•
HARMONICS
Harmonic levels 256 256 256
Total Harmonic Distortion (THD)
• • •
Delta-Sigma D/A Conversion Technology
• • •
Harmonics over-sampling (4096 samples per
cycle)*
• • •
Anti-Alias Filtering
• • •
Individual Harmonics
• • •
Total Demand Distortion (TDD)
• • •
Even, Odd and Interharmonics
• •
HIGHLIGHTS
Sub-cycle disturbance capturing
• • •
dV/dt triggers for sub-cycle oscillatory tran-
sients
• • •
Absolute Threshold and dV/dt triggering
• • •
Power Quality Index - Standard (includes dv/dt
count, %TDDi and %THDv)
• • •
Power Quality Index - Enhanced (includes
Standard Index plus Sag level, Swell level and
Flicker)
• •
Flicker calculations
• •
Automatic trigger setting
• •
Automatic event severity analysis
• •
Event Severity counters
• •
ITIC (Information Technology Industry Council),
previously CBEMA performance curve
• •