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INSTALLATION GUIDE
MODULAR SUNWAY TG
TE OD
Rev. 03
– 01/06/2018
53/
139
Make sure that the equipment is isolated before connecting the DC cables.
Isolate all power supply sources connected to the DC cables prior to carrying out any
operation.
Check if DC cables are properly connected by doing the following:
1. Remove the protective fuses.
2. Apply voltage to the DC inputs by closing the disconnector switches in the string boxes (combiner
boxes).
3. Check polarity in all the connected subfields.
4. Isolate the DC power supply sources again by opening the string boxes (combiner boxes)
disconnect switches.
5. Check if DC power supply sources are properly isolated.
6. Insert the fuses.
6.4.
AC modules power connections
6.4.1. Removing the grilles
The protective grilles ensure IP20 degree of protection in respect to the live components. Remove the
protective grilles to gain access to the power terminals.
DANGER
Before removing the grilles and connecting the inverter to the grid, make sure that no
voltage is present in all power supply sources, such as PV field, grid and auxiliary power
supply source. This prevents voltage from being applied to the inverter terminals when
installing the equipment.
6.4.2. Connecting earth cables
For the technical data concerning the number of cables to be connected, the maximum allowable cross-
section and cable lug type, please refer to section 12.7.2.
The AC module is provided with N. 3 inputs dedicated to earthing. The earth cables are to be connected to
the earth bar. For technical data related to the type of connectable cable, the maximum allowable cross-
section and the type of cable lug, please refer to section 12.8.
Cable entry is at the bottom of the DC section. Do the following:
1. Insert the cable into the cable gland.
2. Strip the cable.
3. Crimp the lug.
4. Clean the contact surface with a clean cloth and ethanol-based cleanser.
5. If oxidized, clean the contact surface with an abrasive tool until metal slightly shines, then remove metal
dust with a clean cloth and ethanol-based cleanser.
6. Do not touch the contact surface once cleaned.
7. Use the nut and bolt supplied to fasten the lug by applying the required torque (see section 12.8.3).
8. Tighten the cable lug.
Do the same for all the cables to be connected. Plug the unused cable lugs.