3. Volt-var
Inverter will generate reactive power when voltage changes.
V1: range (221V, to, 279V) defaults to 242V;
V2: range (221V, to, 279V) defaults to 273V;
V3: range (277V, to, 320V) defaults to 281V;
V4: range (277V, to, 320VV) defaults to 305V;
Q1
,
cap
Q2
=
Q3
=
0
Q4
,
ind
V1
V2
Vnom
V3
V4
Figure 6.24
Volt
-
VAR curve for Q
(
V
)
4. Fixed-PF
Inverter can set power factor from 0.8…1…08
.
(see Figure 6.26 and Figure 6
.
27).
5. Reac-Power
Inverter will generate reactive power when output power changes. This mode is
not required by UL1741SA .
This function is applicable by maintenance personnel only, wrong operation
will prevent the inverter from reaching maximum power.
YES=<ENT> NO=<ESC>
Power
Factor
:+
1
.
00
Figure 6.26 Fixed-PF
Figure 6.25 Volt-VAR
Voltage1
:
242V
Voltage2
:
273V
The adjust range for Q1 and Q4 is (0, 60%), the default setting is 30%. (see Figure 6.25).
Figure 6.27 PF Range
0,6
0,6
1,0
-1,0
P/P
n
under-excited
Q/P
n
under-excited
over-excited
over-excited
I
II
IV
III
-0,2
6. P-Factor
Inverter will change power factor when output power changes. This mode is not
required by UL1741SA.
This function is applicable by maintenance personnel only, wrong operation
will prevent the inverter from reaching maximum power.
100
%
of
Input
Power
Vmin
Vnom
Vstart
Vstop
Vmax
AC Volt
0
Figure 6.28 Volt
-
Watt
characteristic
7. VgWatt-UL
Inverter will change output power when output voltage changes. Please see below chart:
Vstart: range (277V, to, 333V) defaults to 305V;
Default setting 100%;
Vstop: range (305V, to, 360V) defaults to 333V;
Default setting 0%;
Figure 6.29 VgWatt-UL
Voltage
:
305V
P
-
Limit1
:
100
%
6. Normal operation
6. Normal operation
6.7.8.2 Power Rate Limit
This function is used for change Power Ramp-up rate. When inverter start up or input string
MPPT changes, inverter power ramp-up rate is limited in this menu.
The default setting is stop
(disable).
The setting range from 10% to 600%, means inverter power change rate per minute.
Values are not allowed to change. If they are set, they may not conform to the UL1741SA
standard
.
.55.
.54.
