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CARLO GAVAZZI Instruments
WM3-96, 32-bit µ-Processor based power quality analyser with
modular housing for Plug and Play modules
rev. 0
Operating instructions
Important:
We suggest you keep the original packing in case it is necessary to return
the instrument to our Technical Service Department.
In order to achieve the most from your instrument, we recommend you
read this instruction manual carefully.
GENERAL FEATURES
The most important features are:
• Modular housing for Plug and Play modules
• IP65 protection degree
• 32-bit µP-based indicator and controller
• TRMS Measurements
• Back-lighted graphic LCD display (128x64 dots)
• Read-out: 4x4dgt (instantaneous variables)
• Read-out: 4x9dgt (total energies), 4x7dgt (partial energies)
• 4 independent total energy meters (Wh, varh)
• Up to 48 independent partial energy meters (Wh, varh)
• Harmonic analysis up to the 50th harmonic with histogram indication
• Up to 8 simultaneous outputs: pulse, alarm, analogue output and
serial communication port
• According to: EN61010-1; Accuracy: EN60688-1, EN61036, EN61268
The main programming parameters are:
• Programming of the password
• Selection of the electrical system
• Programming of CT ratio (up to 30.000A)
• Programming of the VT ratio (up to 600kV)
• Selection of the variables for the MIN and MAX detection
• Programming of the integration time period calculation
• Tariff management
• Harmonic analysis enabling
• Clock adjustment (if present)
• Programming of the pulse output (if present)
• Programming of the analogue and serial output (if present)
• Programming of the digital filter.
TECHNICAL FEATURES
INPUT SPECIFICATIONS
NUMBER OF INPUTS:
• Current: 6;
• Voltage: 4;
• Digital: 3 free of voltage contacts for synchronization of W-VA-A
measurements.
Current/voltage read-out: <8mA/ 17.5V to 25VDC
ACCURACY (display, RS485, RS232)
Un: 240VL-N, Uf.s. 300VL-N, Ib: 5A, max 6A
• Current: ±0.5% rdg (0.2 to 1.2 Ib), ±5mA (0.02 to 0.2 Ib)
• Voltage: ±0.5% rdg (0.2 to 1.25 Un) including also frequency, power
supply and output load influences
• Frequency: ±0.1% rdg (from 40 to 440 Hz)
• Active power (@25°C ±5°C, R.H. ≤60%): ±0.5% (rdg. + f.s.) (PF 0.5 L/
C, 0.1 to 1.2 Ib, 0.2 to 1.2 Un) or ±1% rdg. (PF 0.5 L/C, 0.1 to 1.2 Ib,
0.2 to 1.2 Un).
• Reactive power (@25°C ±5°C, R.H. ≤60): ±0.5% (rdg. + f.s.) (PF 0.5
L/C, 0.1 to 1.2 In, 0.2 to 1.2 Un) or ±1% rdg. (PF 0.5 L/C, 0.1 to 1.2 Ib,
0.2 to 1.2 Un).
• Apparent power (@25°C ±5°C, R.H. ≤60%): ±0.5% (rdg. + f.s.) (0.1 to
1.2 Ib, 0.2 to 1.2 Un) or ±1% rdg. (0.1 to 1.2 Ib, 0.2 to 1.2 Un).
• Energies (@25°C ±5°C, R.H. ≤60%):class 1 according to EN61036
and to EN61268; Ib: 5A, Imax: 6A; 0.1 Ib: 500mA; start up current:
20mA; Un: 240V
• Harmonic distortion (@25°C ±5°C, R.H. ≤60%): 1% f.s. (f.s.:100%);
phase: ±2°; Imin: 0.1Arms; Imax: 15Ap; Umin: 50Vrms; Umax: 500Vp;
sampling frequency 6400Hz @ 50Hz
ADDITIONAL ERRORS
• Humidity: <0.3% rdg, 60% to 90% R.H.
• Magnetic field: <0.5% rdg, @ 400 A/m.
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