QUINT4-INV/24DC/1AC/600VA/USB
108987_en_00
PHOENIX CONTACT
21 / 25
12.3.2 Application example: Operation on a battery
The inverter DC input voltage is supplied via a battery with
24
V nominal voltage.
A battery has the property that the battery terminal voltage
increases again at low voltage and the resulting load
shedding (for protection against deep discharge). This
increase can amount to several volts. Set the activation
threshold correspondingly high.
–
Lower DC input voltage limit: 21
V
DC
–
Upper DC input voltage limit: 30
V
DC
–
Activation threshold: 27
V
DC
Figure 20
Application example: Operation on a battery
In this setting example, it is ensured that the inverter first
switches on at a battery voltage of 27
V
DC and, for deep
discharge protection, switches off at 21
V
DC.
13
Parallel operation
You can connect up to three inverters in parallel in order to
increase the power or for redundant load supply. The
settings are made via the rotary selector switches on the
front of the device (see section: Setting the operating mode).
The device adopts the rotary selector switch settings when
starting up. Changes to these settings during ongoing
operation will not affect the function of the inverters.
In parallel operation, connect the individual inverters via the
parallel running communication interfaces using RJ45
twisted pair patch cables.
Connect the outputs of the inverters together directly. The
output power is split symmetrically across the individual
inverters in each parallel operating mode.
Observe the following points when carrying out parallel
connection:
1.
Set the operating mode of the individual inverters via the
rotary selector switches.
2.
Use the same cable cross sections for wiring.
3.
Use the same cable lengths up to the AC convergence
point.
4.
Operate the inverters in the same temperature
conditions.
5.
Comply with the national safety regulations. In
particular, comply with the regulations on grounding the
neutral conductor. In the delivery state, this is ensured
through the pre-installed bridge in terminals 2.4 and 1.3.
During parallel operation, the following settings are
transferred from the master device to the slave device. The
settings of the slave device are ignored here:
–
Remote signal terminal operation
–
Settings via the POWER MANAGEMENT SUITE
configuration software. Changes to the settings can
only be made using the master device and are
permanently transferred to the slave devices.
Parameters can be read off from all devices.
The following alarm messages are available in parallel
operation:
–
Parallel mode is not possible:
This combination of master or slave devices is
impermissible.
–
No redundancy:
The device fails in redundant operation or
the total power is too high in redundant operation. This
means that in the case of a device fault, the load cannot
be supplied using a device.
–
System error:
Each alarm in parallel operation is displayed as a sum
message. All alarm signal outputs can be used.
13.1
Increasing power
Parallel connection for increased power is used when
extending existing systems. If the individual inverter does
not cover the current consumption of the most powerful
load, parallel connection of inverters is recommended. The
output power is doubled by using two inverters connected in
parallel.
Information on the device settings is to be found in the
section Setting the operating mode section.
13.2
Redundant operation
Redundant operation of inverters is suitable for supplying
systems and system parts which place particularly high
demands on operational safety.
In the event of a fault, it must be ensured that one of the
individual inverters is able to provide the total required
power for the load.
Information on the device settings is to be found in the
section Setting the operating mode section.
13.3
3AC operation
3AC operation is suitable for supplying systems and system
parts that require symmetrical 3-phase control.
Information on the device settings is to be found in the
section Setting the operating mode section.
. . .
. . .
. . .
[V DC]
Device
on
off
21
27
30
29,5