UL 1703-2019 pdf download

UL 1703-2019 pdf download.Flat-Plate Photovoltaic Modules and Panels .
2.5 BYPASS DIODE — A diode connected across one or more cells, modules, or panels in the forward
current direction to allow current to bypass such cells, modules, or panels.
2.6 CELL — The basic photovoltaic device that generates electricity when exposed to sunlight.
2.7 ELECTRIC SHOCK — A risk of electric shock is considered to exist at a part if the potential between the part and earth ground or any other accessible part is more than 30 Vdc and the leakage current exceeds the values specified in Table 21.1.
2.8 ENCAPSULANT — Transparent insulating material enclosing the cells and cell interconnects.
2.8.1 INHERENTLY LIMITED — Refers to a type of Class 2 Power Source which does not require a separate means to automatically reduce the output levels or de-energize the output circuit as a means of remaining within Class 2 Power Source limits.
2.9 INTERCONNECT — A conductor within a module that provides a mechanism for conducting electricity between cells.
2.10 MAXIMUM POWER (Pmaj — The point on the current-versus-voltage curve of a module, at STC, where the product of current and voltage is maximum.
2.11 MAXIMUM SYSTEM VOLTAGE — The sum of the maximum open-circuit voltages of the maximum number of modules or panels to be connected in series in a system.
2.12 METALLIZATION —An electrically conductive metal coating on the surface of a cell.
2.13 MODULE (FLAT-PLATE) — The smallest environmentally protected, essentially planar assembly of solar cells and ancillary parts, such as interconnects and terminals, intended to generate dc power under unconcentrated sunlight. The structural (load-carrying) member of a module can either be the top layer (superstrate), or the back layer (substrate), in which:
a) The superstrate is the transparent material forming the top (light-facing) outer surface of the module. If load-carrying, this constitutes a structural superstrate.
b) The substrate is the material forming the back outer surface of a module. If load-carrying, this constitutes a structural substrate.
2.14 NOMINAL OPERATING CELL TEMPERATURE (NOCT) — The equilibrium cell junction temperature corresponding to nominal module service operating conditions in a reference environment of 80 mW/cm2 irracjiance, 20° C (68° F) ambient air temperature, 1 mIs wind across the module from side to side, an electrically open circuit, and a mounting method in accordance with 19 and 191.
2.15 PANEL (FLAT-PLATE) — A collection of modules mechanically fastened together, wired, and designed to provide a field-installable unit.
2.16 RATED OPERATING VOLTAGE — The voltage, ±10 percent, at which maximum power is available from the module or panel under STC.
2.16.1 REVERSE CURRENT — Current flowing in a reverse direction to the normal direction resulting from a normally illuminated PV module.
3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 4 Components 4.1 Except as indicated in 4.2, a component of a product covered by this standard shall comply with the requirements for that component. See Appendix A for a list of standards covering components generally used in the products covered by this standard. 4.2 A component need not comply with a specific requirement that: a) Involves a feature or characteristic not needed in the application of the component covered by this standard, or b) Is superseded by a requirement in this standard. 4.3 A component shall be used in accordance with its rating established for the intended conditions of use. Specific components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specified limits, and shall be used only under those specific conditions. 5 References 5.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard.UL 1703-2019 pdf download.