Pv- Generator Dc Connection; Dc Connecting Line - Steca Grid 20000 Installationsanleitung

EN

4.12 PV- Generator DC Connection

Before connecting the PV strings, connect the inverter to the power sup-
ply network and to the ground bolt to ensure that the device is safely
connected to the protective conductor.
Connect the PV strings to the inverter only in the de-energized state, op-
timally in the dark because that is when the PV strings are inactive.
CAUTION
The protective conductor must be connected to the housing separately
from and in addition to the power supply connection.
Live PV strings can be under lethal voltages.
 Before connecting the PV strings, verify that the open circuit voltage
WARNING

The DC connection is effected with MC4-plugs and sockets. Ensure that you use DC
connectors which are suitable for the particular cable diameter. If you use connectors
which are not suitable for the particular cable diameter, the protection class of the de-
vice may fall below IP65.

Whenever it is switched on, the inverter automatically checks the insulation of the PV
generator. If the insulation is defective, the inverter switches off automatically. In this
case, it is absolutely mandatory that the insulation fault of the PV generator be repaired
before the PV generator is connected to the inverter.

Be absolutely sure to verify proper polarity when connecting the PV strings. Any inap-
propriate connection of individual strings may damage the module strings. The inverter
is protected by an integrated polarity reversal protection diode. Protect the connectors
such that they cannot be pulled off inadvertently.

Close unused connectors with plugs. If you fail to do this, the protection class of the
device may fall below IP65.

The connection has to be strictly done according to chapter 3.5 of the operating in-
structions. By non-observance the dc-disconnector can be destroyed.

4.13 DC Connecting Line

Please note the following information (plug type, cross section) regarding the DC power cable.
Denomination Type
Connector plug PV-KST4/6I-UR
Connector plug PV-KST4/6II-UR
Connector socket PV-KBT4/6I-UR
Connector socket PV-KBT4/6II-UR
To attach the crimp contacts on the site, you might acquire the pliers, type PV-CZM -19100 by Mul-
tiContact.
24
does not exceed 50 V.
Item No.
MultiContact
32.0015P0001
32.0017P0001
32.0014P0001
32.0016P0001
Diameter wire insulation
in mm
3 -6
5.5 - 9
3 - 6
5.5 - 9
748.508 | Z01 | 2013-06-10
Cable cross sec-
tion in mm²
4 - 6
4 - 6
4 - 6
4 - 6