6 Electrical Connection
SMA Solar Technology AG
Operating manual
STP3-6-3AV-40-BE-en-13
31
6. Assemble the AC connector and connect the conductor to the AC connector (see manual of
the AC connector).
7. Ensure that all conductors are securely connected to the AC connector.
8. Plug the AC connector into the jack for the AC
connection. When doing so, align the AC connector
so that the key on the inverter AC jack is inserted
into the keyway on the AC connector bush insert.
6.2.3
Connecting Additional Grounding
If additional grounding or equipotential bonding is required locally, you can connect additional
grounding to the inverter. This prevents touch current if the grounding conductor on the AC
connector fails. The necessary ring terminal lug and the screw are included in the scope of delivery
of the inverter.
Additionally required material (not included in the scope of delivery):
☐ 1 grounding cable
Grounding cable requirements:
Use of fine-stranded conductors
You can use an inflexible or a flexible, fine-stranded conductor.
• When using a fine-stranded conductor, it has to be double crimped by a ring terminal lug.
Make sure that no insulated conductor is visible when pulling or bending. This will ensure
sufficient strain relief by means of the ring terminal lug.
☐ Grounding cable cross-section: max. 10 mm²
Procedure:
1. Strip the grounding cable insulation.
2. Insert the stripped part of the grounding cable into
the ring terminal lug and crimp using a crimping
tool.
Summary of Contents for STP3.0-3AV-40
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