Sunways NTX3000, Руководство пользователя

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2 Safety
10
Anti-Islanding protection
Islanding is a condition that can occur if the utility
grid is disconnected while the NTX is operating and
the remaining load is resonant at 60 Hz and matches
the output of the NTX perfectly. This condition
is highly unlikely and had never been witnessed
outside of a controlled laboratory. Nevertheless,
the NTX incorporates an advanced active islanding
protection algorithm to ensure that the system will
not export power into a balanced 60 Hz resonant
load while the utility is disconnected. The NTX peri-
odically injects both leading and lagging reactive
current into the utility grid. This method has been
proven by Canadian Standards Association to effec-
tively destabilize and disconnect from a balanced
island condition.
The NTX is equipped with a ground isolation fault
detection device. If a ground isolation fault is
detected, the NTX will not run and display the fault
function on the user interface display. Once the
ground fault is located and corrected, the ground
fault error will need to be manually cleared and
the inverter will then resume normal operation
automatically.
PV series fusing
Series fusing may be required depending on the
type of PV module used in the system.
See NEC 690.9.
Remark:
For NTX 6000, the AC fuses are optional installed in
the unit. When not provided with the unit, it should
be provided at end installation.
Operating temperature
The NTX has been designed to maintain full
power output at ambient temperatures as high as
+113°F(+45°C). Fan cooling allows this level of out-
put power to be achieved even in enclosed spaces.
The NTX will continue to operate well between
+113°F(+45°C) and +140°F(+60°C) and de-rates as
needed to maintain a safe internal component
temperature.
WARNING
Continuous storage time must be less than 3 months
below -13°F(-25°C).
Interconnection code compliance
The NTX has been tested and listed by Canadian
Standards Association to meet the requirements of
UL 1741 Static Inverters and Charge Controller for
use in Photovoltaic Power Systems and IEEE 1547
Standard for Interconnecting Distributed Resources
with Electric Power System. The NTX is also listed
under UL 1741 for Nationally Recognized Testing
Laboratory.
UL 1741 is the standard applied by Canadian Stan-
dards Association to the NTX to certify that it meets
the requirements of National Electrical Code
® and
functionality necessary to ensure compatible opera-
tion when power generation is connected to the
utility grid.
Remark:
Contact the local utility and/or the authority having
jurisdiction prior to connecting the NTX to the utility
grid.
FCC compliance
The NTX has been tested and shown to confirm with
all FCC Part 15 B EMI/EMC emissions regulations.