Carlo Gavazzi PQT-90 - Manual (Page 8)

and C2 are not available if PQT-90 is supplied with ana-
logue measuring inputs AQ1018 or AQ1019.
❑
Harmonics analysis and digital filter setup
[1] Enables the harmonic analysis on the selected phases,
activate the relevant check boxes.
[2] Selects the value of the “Range” parameter of the digital filter.
[3] Selects the value of the “coefficient” factor of the digital filter.
Example: the value of the V
L-N
variable fluctuates between 222V
and 228V and it is therefore necesarry to stabilize it. The param-
eters of the digital filter must be set as follows:
• RANGE: the variable has fluctuations within the average value
whose amplitude is equal to ±1,3% of the rated value of the
variable itself (where ±1.3% results from (228-222)/ 2= ±3V,
then ±3*100/231V= ±1.3%; 231V being the rated phase-neu-
tral value of a 400V input). The “range” parameter is the action
range of the digital filter and it is set at a value slightly higher than the
percentage amplitude of the fluctuation: e.g. 1.5%.
❑
Digital input working mode setup
[1] Enables digital input A1 (input 1 of the digital input mod-
ule installed in slot A of PQT-90);
[2] Enables digital input A1 working mode: “Gas meter” or
“kWh- meter”.
[3] Set the amount of the input pulse (pulse/m
3 ex.: if the
value 10 has been set, then 10 input pulses will be required
for the following gas metering: 1m
3 ).
[4] Enables digital input A2 (input 2 of the digital input mod-
ule installed in slot A of PQT-90);
[5] Choose digital input A2 working mode: “Water meter”,
“Day, night tariff of the gas meter” or “kvarh- meter”.
[6] Set the amount of the input pulse (pulse/m
3 ex.: if the
value 10 has been set, then 10 input pulses will be required
for the following metering: 1m
3 ).
[7] Enables digital input C1 to the function of kWh meter, C2
to the function of kvarh meter;
[8] Set the amount of the input pulse (pulse/kWh, kvarh ex.:
set the value 10: 10 input pulses will be necessary for the
energy metering of 1kWh, 1kvarh). The input pulses C1
PQTSoft Remote
Configuration
Digital inputs connection
29
45
13
PQTSoft Remote
12
Configuration
8
1
2 3
1 4
7
8
2
6
3
5