Electrical Connection; Safety During Electrical Connection - SMA Sunny Boy 3000TL-US Installation Manual

SMA America, LLC

6 Electrical Connection

6.1 Safety during Electrical Connection

Danger to life from electric shock due to high voltages
High voltages are present in the DC cables and later during operation in the conductive components
of the inverter. These can cause fatal electric shocks.
• Before working on the inverter, always disconnect the inverter from all voltage sources as
described in Section 10.
• Do not open the upper enclosure lid.
Damage to the seal of the enclosure lid during sub-zero conditions
When opening the enclosure lid during sub-zero conditions, the seal of the enclosure lid can be
damaged. There may be an ingress of moisture, which can damage the inverter.
• Do not open the inverter when the outside temperature is below 23°F ( − 5°C).
Damage to the inverter due to electrostatic discharge
Touching electronic components can cause damage to or destroy the inverter through electrostatic
discharge.
• Ground yourself before touching any components.
Damage to the inverter due to moisture ingress
Electronic components in the inverter can be destroyed or damaged as a result of the ingress of
moisture.
• Only use listed conduit fittings for inserting the conduits into the inverter and the
DC Disconnect.
• For outdoor installations, only use rain-tight conduit fittings or conduit fittings for wet locations.
Damage to or failure of the inverter due to incorrectly connected cables
Insecure or high-resistance cable connections (such as incorrectly installed twist-on connectors) can
cause ground faults or arc faults that can lead to the damage or failure of the inverter.
• Select and correctly install cable connections that ensure secure, low-resistance connections
for all electrical connections in the PV system.
Observe local regulations
All electrical installations must comply with the electrical standards applicable on-site and the
National Electrical Code
applicable Canadian standards.
Installation Manual
®
(ANSI/NFPA 70). Installations in Canada must comply with the
6 Electrical Connection
SB3-5TLUS22-IA-en-12 33