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013C7
7 - Appendix
F
unctionality of the equipment
Data transmission and control
The MICRO inverters are monitored remotely through an advanced communications system
based on a wireless connection and the CDD. In addition to local monitoring of the system,
it is possible to have remote data visualization through an internet access to AURORA®
VISION web portal.
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There are many advantages of having each MICRO inverter monitor a single photovoltaic
module:
Capability of viewing each module’s production
Possibility of controlling when to clean each module, as necessary
Ease of service interventions from the possibility of singling out individual modules or
inverter that are down.
Preservation of production even if there is a malfunctioning module or inverter
P
rotective devices
Anti-Islanding
In accordance with required national standards and laws, in the event of a local grid outage
by the utility, or when the grid equipment is switched OFF for maintenance operations, the
inverter must be physically and safely disconnected, to ensure protection of personnel
working on the grid. To prevent possible islanding, the inverter has an automatic protective
disconnection system called “Anti-Islanding”.
Ground fault in the photovoltaic modules
An advanced ground fault protection circuit continuously monitors the ground connection and
disconnects the inverter if a ground fault occurs, indicating this condition by means of the
red GFI LED on the LED panel of the CDD. It is required that the CDD be installed with any
MICRO inverter in compliance with UL1741, for indicating and resetting ground faults.
Protective devices
The inverter is equipped with additional protective devices to facilitate safe operation. These
protective devices include:
Continuous monitoring of the grid voltage to ensure the voltage and frequency values
stay within operating limits;
Control of internal temperatures to automatically limit the power if necessary to ensure
the unit does not overheat (derating).
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