Installation and Operation Manual Page 20 of 104
(PVI-3.8/4.6-I-OUTD-US Rev.: 1.1)
2.4.2 Grounding/differential Protection Fault
WARNING: Some national and local regulations make it compulsory for
one of the DC input terminals to be connected to the system's earth. Carefully
evaluate the national standard so that the inverter's input is correctly
grounded.
A sophisticated ground protection circuit continually monitors the ground connection;
when it detects a ground fault, this circuit shuts down AURORA and turns on a red
LED on the front panel to indicate a ground fault condition. The Aurora inverter is
equipped with a terminal for the system ground conductors.
For further details on the grounding of the terminals and protective devices, please
refer to section 3.3.10.
NOTE: For further details of AURORA shutdown or possible causes of
malfunction, please refer to paragraphs 5.3.
The protective devices for ground failures comply with these standards:
CSA-C22.2 N.107.1-01 UL Std N.1741
2.4.3 Additional Protective Devices
AURORA is equipped with additional protections to guarantee the safe operation
under any circumstances. Such protections include:
Constant monitoring of grid voltage to ensure that voltage and frequency remain
within the specified operational limits (in accordance with UL 1741 standard);
Automatic power limitation control based on internal temperature monitoring to
avoid overheating (heat sink temperature ≤158°F).
AURORA’s many control and protection devices result in a redundant structure
to guarantee operation in absolute safety.
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