Specifications; Reference Conditions; Electrical Specifi Cations; Voltage Inputs - AEMC PowerPad 3945 User Manual

3.1 Reference Conditions

Parameter
Ambient temperature
Humidity
Atmospheric pressure
Phase voltage
Clamp current circuit input voltage
AmpFlex™ current circuit input voltage
Current input voltage detection threshold
Frequency of electricity network
V/I phase shift
Harmonics
The uncertainties given for power and energy measurements are maximum for Cos ϕ = 1 or Sin ϕ = 1
and are typical for the other phase shifts.
NOTE: The symbol "U" will be used throughout this manual and in the instrument
to refer to phase-to-phase voltage measurement.
The symbol "V" will be used for phase-to-neutral voltage measurement.
3.2 Electrical Specifi cations
Sampling Frequency (256 samples per cycle):
12.8kHz samples/sec per channel @ 50Hz
15.36kHz samples/sec per channel @ 60Hz

3.2.1 Voltage Inputs

Operating Range: Phase-Phase - 830Vrms AC/DC
Input Impedance: 338kΩ between phase and neutral
Overload: 1.2Vn permanently; 2Vn for 1 sec (Vn = nominal voltage)

3.2.2 Current Inputs

Operating Range: 0 to 1V
Input Impedance: 1MΩ for current probe circuit and 12.4kΩ for AmpFlex™ circuit
Overload: 1.7V
Power Quality Analyzer Model 3945
C
HAPTER
S
PECIFICATIONS
Phase-Neutral - 480Vrms AC/DC
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Reference Conditions
73°F ± 5°F (23°C ± 3°C)
45% to 75% RH
25.4" Hg to 31.3" Hg (860 to 1060 hPa)
230Vrms and 110Vrms ±2% without DC
0.01V to 1Vrms without DC (<0.5%)
3.9mV to 118mVrms without DC (<0.5%)
0.001 In
50 and 60Hz ± 0.1Hz
0° active power / 90° reactive power
<0.1%
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