INSTALLATION GUIDE
MODULAR SUNWAY TG
TE OD
Rev. 03
– 01/06/2018
35/
139
Figure 10: Single-line diagram - dotted line highlighting the converter module
The SUNWAY TG TE inverters are designed using a modular approach in order to maintain high standards
in quality and guarantee maximum performance.
The conversion unit is the module with component ID code 22U1 in the Electrical and Mechanical Diagram.
It houses the DSP control board and the IGBT power switching devices using avant-garde conversion
technology which guarantees excellent reliability over time, even in the most demanding conditions.
Should any faults arise involving the conversion unit, the inverter has been specially designed to make repair
and replacement operations quick and easy, thus limiting machine downtimes.
For further details and the list showing correspondence between the inverter and converter installed, please
refer to section 12.5.
4.6.
Isolation control device
4.6.1. PV field not earthed
The inverter continually checks isolation resistance between the power supply and the earth, indicating any
isolation loss.
The method of intervention and signalling if isolation loss is detected can be programmed as follows:
•
Isolation loss generates a WARNING signal but does not stop the inverter.
•
Isolation loss generates an ALARM and stops the inverter.
•
Isolation loss is disabled.
Please refer to the Programming Guide in the Alarm Auto-reset menu.
If the PV field Earthed option is installed, isolation loss is not checked. However, the inverter does indicate
that earth connection fuses have blown (please refer to section 8.1).
WARNING
If multi-MPPT SUNWAY TG TE inverters are connected to a single winding in the LV/MV
transformer, it is advisable to program the inverter so that isolation leakage trips an
emergency alarm which stops the inverter.
It is possible to select the alarm threshold by means of the Rotary Switch CE1 located on the control board.
See Figure 11.
