16
E
N
G
L
IS
H
parameters and the output is activated and deactivated only from a
personal computer's serial port. The transducer displays one of the
following possibilities, depending on the type of card being mounted:
PuL
: pulses for energy measurements only.
The number of pulses is set for each energy unit; the latter is defined by
the type of totalized energy chosen in the "EnE" menu (Wh, VAh, VArh)
and by the multiplier, which is identified by a blinking hyphen as for the
"Lo.E" and "Hi.E" parameters. The choice to program the number of
pulses for kWh (or kVAh or kVArh) or for MWh (or MVAh or MVArh) is
made automatically by the transducer according to the installed power, if
the latter is more than 2MW the pulses/energy become pulses for MWh
(or MVAh or MVArh).
AL
: alarm connected to the selected measurement. The selection of this
measure depends on the choice made in the "AL" secondary menu
according to the "Selection / Measurement" table on page 11.
A.on
: value of the high alarm. This value can be set in accordance with
the programmed Hi.E - Lo.E (electrical) input range; the maximum range
is: –999
≤
A.on
≤
999.
A.oF
: value of the low alarm. This value can be set in accordance with the
programmed Hi.E - Lo.E (electrical) input range; the maximum range is:
–999
≤
A.of
≤
999.
dEL
: value expressed in seconds of the time delay at the alarm set-
point's activation (ON). This value is to be programmed within the range:
0
≤
dEL
≤
255; it can be useful when it is necessary to avoid the alarm set-
point's activation if the alarm duration is not long enough.
Note. The operating mode of the set-point is identified by the values of
the set-point with reference to the following cases:
1. A.on > A.oF: the alarm occurs when the measured value is higher than
"A.on". The hysteresis is given by the difference between "A.on" and "A.oF".
The delay time starts when the measured variable goes over the programmed
"A.on" value according to what has been already written for "dEL".
2. A.on = A.oF: the alarm occurs when the measured value is equal to
"A.on". There isn't any hysteresis and the "dEL" delay time starts when the
measured variable goes over the programmed "A.on" value according to what
has been already written for "dEL".
3. A.on < A.oF: the alarm occurs when the measured value is lower than "A.on".
The hysteresis is given by the difference between "A.oF" and "A.on".
The "dEL" delay time starts when the measured variable goes under the
programmed "A.on" value according to what has been already written for
“dEL”.
Example 3: if an alarm is to be activated when the power factor goes
below cos
ϕ
0.75 inductive with an hysteresis equal to 0.1 and a delay of
20 seconds (according to what has been written for A.on > A.oF), select