Introduction to the manual 21
Terms and abbreviations
Term/abbreviation Explanation
AC Alternating current.
Cable lug A connector which is crimped onto the end of cable. Also known
as a crimp connector or cable anchor.
Circuit breaker Automatic switch which will trip to OFF and protect the load
circuit in the event of short circuit and overcurrent situations.
Control board Circuit board in which the control program runs.
DC Direct current.
EFB Embedded fieldbus.
EMC Electromagnetic compatibility.
EMI Electromagnetic interference.
IGBT Insulated-gate bipolar transistor.
Inverter Converts direct current and voltage to alternating current and
voltage.
I2I Inverter to inverter communication protocol.
LED Light emitting diode.
Main disconnector A manually controlled power contactor or manually operated
isolation switch which can be locked in the open position. It is
used to cut off the power supply from the whole distribution
board.
Maximum power point
tracking
Inverter software function that automatically operates the solar
generator, array, string or module at its maximum power point.
MPPT Maximum power point tracker.
Parameter User-adjustable operation instruction to the inverter, or signal
measured or calculated by the inverter.
Photovoltaic cell,
generator, module,
string, array and array
junction box
In this manual, solar power system components based on
photovoltaic effect are called solar cell, solar module, solar array,
solar string and solar array junction box as defined below.
Protective earth (PE) Connection of a point in the equipment, system, or installation to
earth, for protection against electric shock in case of a fault.
RCMU AC and DC sensitive residual current monitoring unit measures
currents of L and N conductor.
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