MODULAR SUNWAY TG
TE OD
INSTALLATION GUIDE
120/
139
Rev. 03
– 01/06//2018
12.3.3. Maximum voltage derating
When equipment is installed at a high altitude, the maximum DC voltage, i.e. the maximum Voc value
applicable to the product in accordance with section 12.3 must be derated as indicated in the table:
Altitude [m]
Maximum DC voltage/max. Voc
0-4000m asl
Unchanged
Table 36: Maximum DC voltage based on altitude
If equipment is to be installed at over 4000 m, please contact Elettronica Santerno SpA.
12.3.4. Rated current derating and uprating
The inverters of the SUNWAY TG TE series automatically adjust the output current at ambient temperature.
Figure 75 shows the maximum current pattern based on ambient temperature for installation at sea level.
If the ambient temperature drops below the rated current setpoint, the inverter automatically increases the
output current within the limits in Figure 75.
Viceversa, if the ambient temperature exceeds the specified temperature at full power, the inverter limits its
output current to protect the internal components against overtemperature.
Figure 76: Temperature derating (at sea level)
For installations above 1000 m a.s.l., the output current is to be decreased by the K
A
factor. The temperature
trend is shown in Figure 77.
