Electrical Connection; Safety During Electrical Connection - SMA SUNNY TRIPOWER CORE1-US Instrucciones De Instalación

SMA Solar Technology America LLC
6

Electrical Connection

6.1

Safety during Electrical Connection

Danger to life due to high voltages of the PV array
When exposed to sunlight, the PV array generates dangerous DC voltage, which is present in the
DC conductors and the live components of the inverter. Touching the DC conductors or the live
components can lead to lethal electric shocks. If you disconnect the DC connectors from the
inverter under load, an electric arc may occur leading to electric shock and burns.
• Do not touch non-insulated cable ends.
• Do not touch the DC conductors.
• Do not touch any live components of the inverter.
• Have the inverter mounted, installed and commissioned only by qualified persons with the
appropriate skills.
• If an error occurs, have it rectified by qualified persons only.
• Prior to performing any work on the inverter, disconnect it from all voltage sources as
described in this document.
Risk of fire
• To reduce the risk of fire, connect only to a circuit provided with 100 A maximum branch-
circuit overcurrent protection in accordance with the National Electrical Code
NFPA 70).
Damage to seals on the enclosure lids in subfreezing conditions
If you open the enclosure lids when temperatures are below freezing, the enclosure seals can be
damaged. This can lead to moisture entering the inverter.
• Only open the enclosure lids if the ambient temperature is not below -5°C (23°F)
• If a layer of ice has formed on the seal of the lid when temperatures are below freezing,
remove it prior to opening the enclosure lids (e.g. by melting the ice with warm air).
Observe the applicable safety regulations.
Damage to the inverter due to moisture ingress during electrical installation
• Never open the inverter when it is raining or snowing, or the humidity is over 95%.
• For attaching the conduits to the enclosure, only use UL-listed rain-tight conduit fittings for
wet locations.
• Seal all unused openings tightly.
Installation Manual
DANGER
CAUTION
NOTICE
NOTICE
STP50-US-40-IA-en_es-11
6 Electrical Connection
®
(NE, ANSI/
23