User Manual
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2. DESCRIPTION OF THE DEVICE
2.1. FUNCTIONS
The C.A. 8331 or the C.A 8333 (Qualistar+) is a three-phase network analyzer with colour graphic display and built-in recharge-
able battery.
It plays three roles, and can be used:
to measure the RMS values, powers, and perturbations of electric distribution networks.
to deliver a snapshot of the principal characteristics of a three-phase network
to track the variations of various parameters over time.
The measurement uncertainty of the device is better than 1% (not counting the uncertainties due to the current sensors). The
device is also very flexible, with a choice of sensors allowing measurements ranging from a few milliamperes (MN93A) to several
kiloamperes (AmpFLEX™).
The device is compact and impact resistant.
The ergonomics and simplicity of its interface make using it pleasant.
The C.A. 8331 or the C.A 8333 is intended for the technicians and engineers of electrical installation and network inspection and
maintenance teams.
2.1.1. MEASUREMENT FUNCTIONS
The principal measurements made are:
The RMS values of AC voltages up to 1000 V between terminals. By using the ratios, the device can measure voltages up to
hundreds of gigavolts.
The RMS values of AC currents up to 10,000 amperes. By using the ratios, the device can measure currents up to hundreds
of kiloamperes.
The DC components of voltages and currents.
Minimum and maximum half-cycle RMS voltage and current values (excluding neutral current).
Peak voltage and current values (excluding neutral current).
The frequency of 50 Hz and 60 Hz networks.
Current and voltage peak factors (excluding neutral current).
Calculation of the harmonic loss factor (FHL), application to transformers in the presence of harmonic currents.
Calculation of the K factor (KF), application to transformers in the presence of harmonic currents.
Measurement of total harmonic distortion with respect to the fundamental (THD in % f) of the current and of the voltages
(excluding neutral current).
Measurement of the total harmonic distortion with respect to the RMS AC value (THD in % r) for the current and the voltages
(excluding neutral current).
Active, reactive (capacitive and inductive), non-active, distortion, and apparent power, by phase and cumulative.
Power factor (PF) and displacement factor (DPF or cos Φ).
Measurement of the RMS distortion value (d) for the current and the voltages (excluding neutral current).
Short-term voltage flicker (PST).
Active, reactive (capacitive and inductive), non-active, distortion, and apparent energy.
Current (excluding neutral current) and voltage harmonics up to order 50: RMS value, percentage referred to the fundamen-
tal, (%f), or the total RMS value (%r) (for the C.A. 8333 only), minimum and maximum and sequence harmonics (only for the
C.A 8333).
Apparent harmonic power up to order 50: percentages referred to the fundamental apparent power (%f) or the total apparent
power (%r) (for the C.A. 8333 only), minimum and maximum of a rank.
Calculation of the RMS neutral current from the currents measured on the phases of a three-phase system.