Environmental Conditions And Risks; Thermal And Electrical Hazards; Clothing And Protection Of Personnel - ABB UNO-DM-TL-PLUS-US Product Manual

E
nvironmental conditions and risks
The inverter is designed to be installed outdoors, in environmental conditions
meets ambient temperature, air circulation and other specifications.
Do not install the inverter in a flammable or explosive environment.
Operator must be properly trained and qualified personnel to come
into close proximity to the equipment, and highlight, with notices or
other means where necessary, the hazardous areas or operations at
risk: magnetic fields, hazardous voltages, high temperatures, possible
discharges, generic hazard, etc.
T
hermal and electrical hazards
Do not remove covers until voltage has been completely removed from the
inverter. Follow guide for voltage discharge and component cool off time.
When the device has just been switched off, it may have hot parts as
a result of overheating of the heated surfaces (e.g.: transformers,
accumulators, coils, etc.) so be careful where you touch.
C
lothing and protection of personnel
NFPA standards (which OSHA recommends and consults) require the
equipment owner to field-label electrical equipment with labels containing
the available incident energy and required level of PPE, to protect both
in-house and contract workers from electric shock and arc flash.
Label requirements are determined by site-specific arc flash studies
and depend on the inverter model, types and exact locations of external
disconnects upstream and downstream of the inverter, by voltages and
power levels at any given installation.
NFPA 70E Article 130.3 states that the analysis must be reviewed at least
every 5 years or whenever a major modification occurs. This means that
the label should include a date, and the date must be documented.
The system is not ready for commissioning until PPE labels have been
installed.
Personnel must not wear clothes or accessories that could start fires
or generate electrostatic charges or, in general, clothing that can
compromise personal safety.
Maintenance operations may only be performed after the inverter has
been disconnected from the grid and from the PV array.
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