INSTALLATION GUIDE
MODULAR SUNWAY TG
TE OD
Rev. 03
– 01/06/2018
129/
139
Rated voltage of PV Plant [V]
1000
1500
Maximum voltage of PV Plant [V]
1000
1500
Rated discharge current [kA]
12.5
12.5
Response time [ns]
25
25
Configuration
Y-connection of N.3 SPDs to varistor
UP safety level ( L-L / L-PE ) [kV]
4
6
Remote signal contact
Type
1 NO/NC
Maximum range
250 Vac - 0.5 A
Cable cross-section [mm
2
]
1.5
Environmental conditions
Operating temperature [°C]
-40...+80
General specifications
Removable cartridges
Yes
UL94 Fire resistance
V0
Table 53: SPD technical specifications
12.10. Grid-side SPD Configuration
When an SPD trips, its impedance SPD drops to very low values. This limits surge and drains induced
currents for equipment safety. However, if the SPDs are earthed, they may create a low-impedance path
for the plant currents, thus nullifying the IT configuration.
If the SPDs are installed to protect the AC inverter output, be careful to properly consider the plant design,
should an Earthed option be required. This configuration can cause switching frequency common mode
voltage to be greater than the output rated voltage.
It is therefore advisable to adopt the following SPD configuration:
•
For the differential mode protection, a star configuration connected to the neutral (use the neutral/start
centre on the inverter side as a reference) is advisable
•
For the common mode protection, a properly dimensioned SPD connected between the neutral and
the earth is advisable
If the grid-side SPDs are required, the PV field configuration for the proper dimensioning of the SPDs is to
be specified when ordering the product.
12.11. Control Board
Screw terminal board with 6 separate removable sections suitable for 0.08 - 1.5 mm
2
(AWG 28-16) cables.
