• Measurement calibration section:

• Voltage: ± 0.05% (± 0.1%)

• Current: ± 0.05% (± 0.1%) (clamp transformer ± 0.5%)

• Active Power: ± 0.05% (± 0.1%) (clamp transformer ± 0.5%)

• Reactive power: ± 0.3% (± 0.5%) (clamp transformer ± 1.0%)

• Active energy: ± 0.05% (± 0.1%) (clamp transformer ± 0.5%)

• Reactive power: ± 0.3% (± 0.5%) (clamp transformer ± 1.0%)

• Frequency: ± 0.05% (± 0.1%)

• Phase: ± 0.2 °

Power Quality

• Fundamental voltage and current amplitude: the fundamental voltage tolerance ≤0.5% FS; fundamental current allowable error ≤1% FS

• Measuring the phase difference between the fundamental voltage and current error: ≤0.5 °

• Harmonic voltage measurement error: ≤0.1%

• Content of harmonic current measurement error: ≤0.2%

• Three-phase voltage unbalance error: ≤0.2%

Insulation

• Voltage the current input on the chassis insulation resistance ≥100MΩ.

• Working power input frequency between the shell to withstand workers 1.5KV (RMS) which lasted one minute experiments.

Standard energy pulse constant

Standard power pulse constant: Built transformer constant (FL) = 10000 r / kW · h
Clamp Transformer constant (FL):