THREE PHASE ENERGY METER

Voltage and Current: 

Phase to neutral voltages 100 to 289V a.c. (not for 3p3w supplies)

Voltages between phases 173 to 500V a.c. (3p supplies only)

• Basic current (Ib): 10A
• Max current : 100A
• Min. Current: 5% of Ib
• Starting current: 0.4% of Ib

Percentage total voltage harmonic distortion (THD%) for each phase to N ( not for 3p3w supplies)

Percentage voltage THD% between phases (three phase supplies only)

Current THD% for each phase

Accuracy:

• Voltage 0·5% of range maximum
• Current 0·5% of nominal
• Frequency 0·2% of mid-frequency
• Power factor 1% of unity (0.01)
• Active power (W) ±1% of range maximum
• Reactive power (VAr) ±1% of range maximum
• Apparent power (VA) ±1% of range maximum
• Active energy (Wh) Class 1 IEC 62053-21
• Reactive energy (VARh) ±1% of range maximum
• Total harmonic distortion 1% up to 31st harmonic
• Temperature co-efficient Voltage and current = 0.013%/°C typical
• Active energy = 0·018%/°C, typical
• Response time to step input 1s, typical, to >99% of final reading, at 50 Hz.

Power factor, Frequency, and Max. Demand:

• Frequency in Hz
• Maximum demanded power since last Demand reset Power factor
• Maximum neutral demand current, since the last Demand reset (for 3p4w supply only)

Instantaneous power: 

Energy Measurements:

Reference Conditions of Influence Quantities:

Environment: