Amprobe PQ55A Power-Analyzer - Manual (Page 40)

Technical Data
(valid for 23 °C ± 5 °C, for less than 70 % relative humidity).
Voltage measurement: ....3 input channels with common reference point “N”
Measurement range: ....0 to 600 Vrms
Display range: ..............0 to 999.9 Vrms
Resolution: ..................0.1V
Accuracy: ....................± (1% rdg + 10D) for voltage > 80 V
Mains frequency: ........50 Hz
Input impedance: ........2 MOhm
Overload protection: ....1000 Vrms
Current measurement
Measurement range:
Input I1, I2, I3 ..........3 A to 999.9 A
Input I4 ....................3 A to 250 A
Display range: ..............0 A to 999.9 A
Resolution: ..................0.1 A
Accuracy: ....................± (2.5 % rdg +15 D)
Reduction ratio of current clamp: 0.35 mV/A
Clamp opening: ............40 mm
Admissible overload: ....10 % (for sinusoidal wave form); max. 30 seconds
Active power P
Display of active power of individual input or total value, as desired
Display range: ..............0 to 999.9 kW
A negative active power can be recognised by the sign “- “.
Resolution : ..................0.1 kW
Accuracy (for PF ≥ 0,5): ± (3.5 % rdg + 20 D)
Accuracy (for PF < 0,5): ± (4.5 % rdg + 40 D)
Apparent power S (calculation from the rms values of voltage and current)
Display of apparent power of an individual input or the total value, as desired
Display range: ..............0 – 999.9 kVA
Resolution: ..................0.1 kVA
Type of connection 1P2W
Accuracy (for PF ≥ 0,5): ± (3.5 % rdg + 20 D)
Accuracy (for PF < 0,5): ± (4.5 % rdg + 40 D)
Type of connection 1P3W, 3P3W, 3P4W
Accuracy (for PF ≥ 0,5): ± (3.5 % rdg + 20 D)
Accuracy (for PF < 0,5): ± (7.5 % rdg + 40 D)
Idle power Q (calculation out of active and apparent power)
Display of idle power of an individual input or the total value, as desired
Display range: ..............0 to 999.9 kVAr
A negative sign “- “shows a leading current.
Resolution: ..................0.1 kVAr
Formula:
Power factor PF (cos (f) (calculation out of active and apparent power)
Display of power factor of an individual input or the total value, as desired
Measurement range: .... 0 ...+1
A negative sign “- “shows a leading current.
Resolution: ..................0.001
Accuracy: ....................± (1 % rdg + 25 D)
Q =
− S P 2 2
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