Carlo Gavazzi PQT-90 - Manual (Page 35)

PQT-90 Instruction manual
Technical features
67
PQT-90 Instruction manual
66
Technical features
59
Multi-time: energy.
Number of total meters: 4; partial meters: 48; (kWh+/kvarh+) from
0,00 to 999 999 999.99 (kWh-/kvarh-) from 0,00 to -999 999 999.99
Time periods: 4, programmable within 24 hours.
Time seasons: 3, programmable within 12 months.
Pulse output: to be connected to the total and/or partial meters
(dual time, multi-time periods).
Energy metering recording: Energy consumption history,
recording of energy metering by months, oldest data: 2 months
before current date. Recording of total and partial energy meter-
ing. Energy metering recording (/EEPROM). Max. 999 999 999.99
kWh/kvarh.
■ Harmonic distortion analysis
Analysis principle: FFT
Harmonic measurement: current, up to the 50
th harmonic
Voltage, up to the 50 th harmonic.
Type of harmonics:
THD (V
L 1) THD odd (V L 1) THD even (V L 1).
Same is for the other phases: L2, L3.
THD (A
L 1) THD odd (A L 1) THD even (A L 1).
Same is for the other phases: L2, L3.
Harmonic phase angle: the instrument measures the angle
between the single harmonic of “V” and the single harmonic of “I”
of the same order. According to the value of the “electrical angle”
it is possible to know if the distortion is absorbed or generated.
Note: if the system has 3 wires the angle cannot be measured.
Harmonic details: THD % / RMS value; THD even % / RMS value;
THD odd % / RMS value / single harmonics in % / RMS value.
System: the harmonic distortion can be measured in single-
phase, 3-wire or 4-wire systems. Tw: 0.02.
■ Time period management (energy, water and
gas metering)
Time periods: energy, selectable: single time, dual time and
multi time.
Single time: energy, water, gas.
Number of meters: 4(kWh+/kvarh+) from 0.00 to
999 999 999.99 (no partial meters) (kWh-/kvarh-) from 0.00 to
-999 999 999.99
Dual time: energy, gas.
Number of total/partial meters: 4 (kWh+/kvarh+) from 0.00 to
999 999 999.99 (kWh-/kvarh-) from 0,00 to -999 999 999.99.
Time periods: 2, programmable within 24 hours.