UL 8703:2011 free download

UL 8703:2011 free download SUBJECT 8703 OUTLINE OF INVESTIGATION FOR CONCENTRATOR PHOTOVOLTAIC MODULES AND ASSEMBLIES
1 Scope
1 .1 These requirements cover concentrator photovoltaic (CPV) modules and assemblies that concentrate light on a target PV cell(s) for use in general and restricted areas in accordance with the unit’s installation instructions. A CPV module is defined as any photovoltaic module which uses artificially elevated levels (i.e. concentrated) of solar irradiance to produce electrical energy.
1 .2 These requirements address concentrator photovoltaic (CPV) modules and assemblies intended for installation in accordance with their installation instructions on or integral with buildings, or to be freestanding (i.e. ground mounted or otherwise not attached to buildings), in accordance with the National Electrical Code, NFPA 70, and model building codes.
1 .3 The installation class for CPV modules and assemblies identifies the intended installation location as either general access areas designated “General,” or restricted access areas designated “Restricted.” General access units are able to be installed in open areas that may be contacted by the general public. Restricted access units are to be installed in areas that prevent general public access such as a locked and fenced in area.
1 .4 These requirements cover CPV modules and assemblies intended for use in systems with a maximum system voltage of 1 500 V. Exception: CPV modules that are constructed in the flat plate module format as defined by the Standard for Flat-Plate Photovoltaic Modules and Panels, UL 1 703, and with a concentration ratio of no more than 3 times shall be evaluated in accordance with all of the requirements in UL 1 703.
2 Glossary
2.1 ARTIFICIALLY CONCENTRATED SOLAR IRRADIANCE (ACSI) – Any artificially (i.e. man made) elevated level of solar irradiance (examples: lenses, reflectors, etc.)
2.2 AIR MASS (AM) – A dimensionless quantity, the ratio of the actual path length of radiation through the atmosphere to the vertical path length of radiation through the atmosphere to sea level. At sea level, for all but very high zenith angles (qz) (the angle subtended by the zenith and the line of sight to the sun).
2.3 BLOCKING DIODE – A diode used to block reverse current into a photovoltaic-source circuit.
2.4 BYPASS DIODE – A diode connected across one or more cells, modules, or assemblies in the forward current direction to allow current to bypass such cells, modules, or assemblies.
2.5 BARRIER – A part inside an enclosure that reduces access to a part that involves a risk of fire, electric shock, injury to persons, or electrical energy-high current levels.
2.6 CLASS 2 TRANSFORMER – A step-down transformer complying with the applicable requirements in the Standard for Class 2 and Class 3 Transformers, UL 1 585.
2.7 CONCENTRATOR – The term associated with photovoltaic devices that use concentrated sunlight.