Lorentz PS2-150 Manuel D'installation Et De Fonctionnement page 19

DC Disconnect Switch
Every solar pump system must be equipped with a properly
sized DC disconnect switch. The switch must be installed
between the PV generator and controller. It must meet the
following requirements:
ƒ minimum rating according to "Table 1: Minimum DC
disconnect rating" on page 17
ƒ continuous current rating according to maximum
current of the connected PV generator or higher
ƒ the switch must be rated for DC current, not AC
A PV disconnect switch matching all requirements above
can be purchased from LORENTZ.
CAUTION – The use of a properly sized
disconnect switch is an important safety
measure and obligatory for a professional
installation of a solar pump system.
Table 1: Minimum DC disconnect rating
Controller Min. DC disconnect switch rating
PS2-150
PS2-200
PS2-600
PS2-1800
PS2-4000
50V DC
100V DC
150V DC
200V DC
375V DC
Controller Installation
Electrical Conduit
Electrical conduit is recommended. We recommend the use
of an electrical conduit (pipe) to protect outdoor wiring
from the weather, from human activities and from damage
caused by animals. If you do not use a conduit, use a strong,
high-quality outdoor cable. Where cables enter the junction
box, install sealed strain-relief cable glands.
Wire sizes
For signal cables, the min. wire size should be 1.5 mm²
(16AWG). For power cables, the min. wire size should be 2.5
mm² (14AWG). Compare your wire sizes to the LORENTZ
COMPASS sizing reports. Cables should be shielded to meet
EMC the requirement.
For outdoor use, cables meeting the requirements of 60245
IEC 66 are recommended. For indoor use, the recommended
cable type is defined in 60245 IEC 57. The installer must
always consider the local situation, codes of practice and
regulations and use a cable that meets these requirements.
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