Delta M Series Operation And Installation Manual page 59

Nominal current
Nominal current is the absorbed current in case of electrical devices if the device is supplied with
the nominal voltage and yields its nominal power.
PE
In electric systems and cables a protective earth conductor is frequently employed. This is also
called grounding wire, protective grounding device, soil, grounding or PE (English „protective
earth").
Photovoltaics (abbr.: PV)
The conversion of PV energy into electrical energy.
The name is composed of the component parts: Photos - the Greek word for light - and Volta - after
Alessandro Volta, a pioneer in electrical research.
Power dissipation
Power dissipation is designated as the difference between absorbed power and power of a device
or process yielded. Power dissipation is released mainly as heat.
PV cell
PV cells are large-surface photodiodes which convert light energy (generally sunlight) into electrical
energy. This comes about by utilization of the photoelectric effect (photovoltaics).
PV generator
System comprising of a number of PV modules.
PV module
Part of a PV generator; converts PV energy into electrical energy.
RJ45
Abbreviation for standardized eight-pole electrical connector connection. RJ stands for Registered
Jack (standardized socket).
RS485 (EIA485)
Differential voltage interface on which the genuine signal is transmitted on one core and the ne-
gated (or negative) signal on the other core.
Separate grid system
Energy supply equipment which is completely independent of an interconnected grid.
Solar inverter
is an electrical device which converts DC direct voltage into AC voltage and/or direct current into
alternating current.
String
Designates a group of electrical PV modules switched in series.
String solar inverter (solar inverter concept)
The PV generator is divided up into individual strings which feed into the grid over their own string
solar inverters in each case. In this way, the installation is considerably facilitated and the gain de-
crease, which can arise from the installation or from different shading conditions of the PV modules,
is considerably reduced.
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