3.9 Parallel Connection
The "-P" type in the
Delta UM series
inverter has the parallel capability and can be operated
in parallel
.
This inverter can be used in parallel with two different operation modes.
1.Parallel operation in single phase with up to 10 units.
2
.
Maximum 10 units work together to support 3-phase equipment.
n
PV
PV
LOAD
GRID
GENERATOR
BATERY
n
≤
10pcs
Figure 3.16
Parallel operation in single phase
DC
AC
Communication
GRID
BATTERY
BATTERY
BATTERY
PV
n2
n3
ATS
GENERATOR
PV
PV
PV
PV
PV
single phase LOAD
three phase LOAD
DC
AC
Communication
Figure 3.17 Parallel operation in three phase
n1+n2+n3
≤
10pcs
n1
≥
1
n2
≥
1
n3
≥
1
three
phase
LOAD
must be Y type
n1
Please refer to
《parallel quick installation guide》
.
3. Installation
3. Installation
Description
Status
Light
BATTERY
3.10 LED Indicates
There are three LED indicators on the
Delta UM series
inverter which indicate the working status.
Table 3.3 Status Indicator Lights
Color
FLASHING
ON
OFF
Green
The inverter is in self-test
(
Fast flashing for 3S
)
.
The inverter is in standby
(
Slow flashing for 3S
)
.
The inverter is normally operational.
No power to the inverter system.
Green/Yellow
Yellow/Red
ALARM
STATUS
GREEN FLASHING
GREEN CONSTANT
Battery is charging.
Battery is discharging.
YELLOW CONSTANT
OFF
Battery is not working.
Battery failure.
YELLOW CONSTANT
RED CONSTANT
OFF
There is an alarm but system working normally.
There is an alarm but system stops.
No Alarm.
3.11 Power-on instructions
1. The LCD screen can light up with only PV, battery or grid connected to it.
2 .If it is required to support the loads with backup power ,battery must be installed.
After the backup port starts to output, turn off the battery, and the loads can continue
to be supported by the grid power.
3.
MasterPower
suggestion on powering on the inverter: Firstly turn on the battery, then turn on PV
and grid in turns.
.18.
.19.
