2 Safety
SMA America, LLC
12
SB3-5TLUS22-IA-en-12
Installation Manual
2.2 Skills of Qualified Persons
The tasks described in this document may only be performed by qualified persons. The qualified
person must have the following skills:
• Knowledge of how an inverter works and is operated
• Training in how to deal with the dangers and risks associated with installing and using electrical
devices and plants
• Training in the installation and commissioning of electrical devices and plants
• Knowledge of all applicable standards and directives
• Knowledge of and adherence to this document and all safety precautions
2.3 Safety Precautions
Danger to life from electric shock due to high voltages in the inverter
High voltages that can cause fatal electric shocks are present in the live components of the inverter.
• All work on the inverter may only be carried out by qualified persons.
• Prior to performing any work on the inverter, disconnect the inverter on the AC and DC sides
(see Section 10 "Disconnecting the Inverter from Voltage Sources", page 55).
• Only operate the inverter with the enclosure lid closed.
• Do not open the upper enclosure lid.
Danger to life from electric shock due to damaged devices
Operating a damaged inverter can lead to hazardous situations that result in death or serious
injuries due to electric shock.
• Only operate the inverter if it is technically safe and in full working order.
• Check the inverter regularly for visible damage.
• Only operate the inverter if there is no visible damage.
Risk of burns due to hot surfaces
The surface of the inverter can become very hot. Touching the surface can result in burns.
• Do not touch hot surfaces.
• During operation, do not touch any parts other than the lower enclosure lid of the inverter.
• Observe the safety messages on the inverter.
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