ITALFARAD PFC 12, Operating Instructions Manual

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ITALFARAD S.p .A. via IV novembre n.1 Minerbio (BO) It aly
36
LED FUNCTION BY PRESSING - BY PR
VOLTAGE RMS voltage MAX voltage value
CURRENT RMS current MAX current value
kvar
kvar required to
reach set-point
kvar
(system kvar)
Steps (kvar) required to
reach set-point
WEEKLY P.F.
Average weekly
power factor
(a)
Real power factor
OVERLOAD %
Thd I %
capacitors (b)
MAX overload value Overload event counter
TEMP.
Electric panel
Temperature (c)
MAX temperature value Unit of meaure °C or °F
SET COS Required COS
Decrease SET COS
value
Increase SET COS value
a
This PF (Power Factor) value is determined by active and reactive energy meters of
the last 7 days. It is referred to positive energy quadrants only.
b
Overload current (Thd I %) caused by harmonic voltage at the capacitor terminals.
c
Caution! The temperature measurement is considered valid after a period of 20-30
minutes after power up.
The maximum values of Voltage, Current, Overload and Temperature along with average
weekly power factor can be cleared by simultaneously pressing the
+ and - keys for 3
seconds. Once clearing is complete, the display views CLr .
The AUT and MAN LED’s indicate the automatic or manual operating mode.
To change mode, press the
MAN/AUT key for at least 1 second.
When the SET COS LED is lit up, no mode change is possible.
The operating mode remains stored even if power is removed.
Normally, the display shows the cos of the system together with the IND and CAP
LED’s. The flashing decimal point indicates the negative sign (inverse energy flow).
By pressing the
MODE key, the V, A, kvar, etc. LEDs are switched on one after another
and the relative measurement of each is shown.
An optional function is available for each LED and indicated on the front panel, which can
be displayed by pressing the
+ and - keys (the LED flashes quickly thereafter).
When the SET COS LED lights up, the set-point of the required cos can be pro-
grammed; the
+ and - keys increase or decrease the value respectively. The set cos can
be adjusted between 0.80 IND and 0.80 CAP.
The following table summarises all the available measurements.
GB
1.12 DISPLAY OF MEASUREMENTS AND REQUIRED COS SETTING
1.13 MAXIMUM VALUE CLEARING
1.14 OPERATING MODE