Lorentz PSk3-7 User Manual

Controller Installation 4544 Controller Installation
EN EN7.4.2 .6 Grid Operation
PSk3 is designed to work with a grid voltage range
of 380 to 480V +/- 10% and a frequency-range of 45
to 65 Hz.
Before connecting to the grid and during operation
PSk3 is monitoring the voltage range of the grid and
connects if the grid voltage is in range.
If voltage uctuations occur due to an unstable grid,
PSk3 will not connect or shut down its operation, as
unstable grid can damage components inside PSk3.
Figure 13: PSk3 controller for connection of hybrid
operation, top view
a
NOTE – If the controller is installed in
an environment with an unstable grid,
the controller will shut down or not even
start to protect its components from
damage.
NOTE – If the controller is used in
hybrid operation the solar array must not
be grounded.
7.4.2.4 Wiring
The following cable sizes are minimum
recommendations depending on the size of PSk3
system being used.
Table 8: Min recommended cable sizes
PSk3
system
AC input cable
PSk3-7
2.5 mm²/AWG 14
PSk3-15 6 mm²/AWG 10
According to the technical data of the controller,
the technical rules of the country of installation
are to be applied for the cable selection taking into
account the cable length, temperature and type of
installation. The specied conductor cross-sections
in table are minimums. For further information on
max. Input AC current refer to „4.2 Technical Data of
the PSk3 Controller“ on page 12.
The values in the table are for ambient temperatures
of up to 30°C. If you expect higher temperatures, use
the next larger cable size.
Ensure all terminals are tightened.
7.4.2 .5 Fuses
The PSk3 does not include AC fuses. The AC input
supply must be equipped with an appropiate fuse.
„Table 2: Technical Data of the PSk3 Controller“
on page 12 states the rated AC input current
based on a 400 V three-phase grid and shall not be
exceeded. For all PSk3 controller sizes the fuse types
“gR” or “gS” are recommended. For PSk3-7 the rated
fused current needs to be 20 A, for PSk3-15 the rated
fuse current needs to be 35 A. In case the locally
available supply AC voltage is higher than 400 V, the
used fuses need to comply with the higher voltage.
The current ratings for each controller type are valid
for higher voltages as 400 V, too.
Circuit breaker
The PSk3 does not include an AC fuse or circuit
breaker. A manual disconnection device is required
to isolate the PSk3 from the AC source and allow
installation and maintenance.
Reasons to open the AC circuit breaker:
- Working on the controller (installation or
maintenance)
- Working on solar array (additionally open DC
disconnect switch)
- Working on the motor
AC input
AC ground
SmartStart connector

Lorentz PSk3-7 Specifications

General

Brand	Lorentz
Model	PSk3-7
Category	Inverter
Language	English