DST2600 User’s Manual 15
In this mode are usually shown the fundamental electrical measurements of the generator.
Phase:
in the left side of the first row there is the indication of the phase (phase L1 in
the example) to which the voltage and current visualized in the rest of the row are
referred. With single-phase systems the phase indication is always L1. With three-
phases systems the phase shown changes cyclically following the order L1, L2 and
L3. ATTENTION: only with software release lower or equal to 00.03 is however
possible to force the visualization of one phase pressing together in the order the
“AUX/PROGRAM” and “MODE/ACK” keys: the visualization is halted and so the
present phase stays visualized. In this condition the phase indication flashes.
Generator voltages:
again, on the first row is shown the generator voltage expressed
in volts. Voltages are visualized with maximum three digits, with no decimals. If the
value is lower than 10V the visualization is forced to zero.
For three-phases systems it is shown the phase-to-phase voltage:
o
L1-L2 if it is currently visualized the phase L1.
o
L2-L3 if it is currently visualized the phase L2.
o
L3-L1 if it is currently visualized the phase L3.
For single-phase systems it is visualized the phase
–to-neutral voltage.
Generator currents
: in the first row, in the centre, it is shown the current
measurement of the phase currently visualized, expressed in Amperes. It is visualized
with two decimal digits if lower than 10 amps, otherwise with only one decimal digit. If
the value is lower than 0.66A for 20kVA version or 1.2A for 40kVA version, the
visualization is forced to zero.
Generator frequency
: in the right side of the first row there is shown the frequency
of the generator voltage, always related to the L1 phase. It is expressed in hertz and
is visualized with a decimal digit.
Active power
: in the left side of the second row there is the indication of the total
active power supplied by the generator, expressed in kW. In case of power reverse,
the active power has negative sign. If the currents values (or voltages values) drop
lower than their visualization thresholds (see above), the visualization is forced to
zero.
Reactive power
: in the centre of the second row there is the indication of the total
reactive power supplied by the generator, expressed in kvar.
Power factor
: on the right side of the second row there is the indication of the total
power factor of the load connected to the generator. To its right th
ere is the “
i
” letter if
the load has inductive characteristics or the “
c
” letter if capacitive. Normally the
indication is with one integer and two decimal digits; if the currents drop lower than
1/10 of their full scale value (that is 3.3A for 20kVA version and 6.2A for 40kVA
version) the power factor is forced to one. In the case of power reverse the indication
is preceded by a minus sign and the integer digit is not shown.
L1 400 10.1 50.0
6.97 0.0 1.00i
