SunPowerCorporationDocument#001‐69178Rev**
10
2.3.b Connecting the SunPower Inverter to the Electrical Grid
Inside the SunPower Inverter are two circuit boards:
♦ The Control Board
♦ The Power Distribution Board:
• The AC connection terminal
• The DC connection terminal
• The Internal AC grid fuse(s)
• The Internal Ground Fault Interrupt fuse
WARNING: For continued protection against risk of fire, replace only with same type and
ratings of fuse. The SPR-5200 and SPR-4600 both use only Littelfuse 30 AMP 250V AC rated
fuse
.
SunPower provides overcurrent protection on the Power Distribution Board with two 30 AMP
fuses in the SPR-5200 and SPR-4600 (See warning above). Additional over current protection
for the inverter’s AC output is provided by circuit breakers at the breaker panel.
WARNING: Replace GFI fuse with only same type and rating of fuse. The SPR-5200 and
SPR-4600 uses only Littelfuse KLKD001 1A/600V.
The SunPower Inverter is connected to the electrical grid using 3 wires - the LINE 1, LINE
2/NEUTRAL and GROUND.
Please Note: To avoid an increase in AC voltage to unacceptable values while the
SunPower Inverter is connected, the grid impedance value at the connection point
should be as low as possible. By keeping the grid impedance value low, higher system
efficiency will be achieved.
The total impedance of the grid plus the interconnecting AC wires should be less than
1.25 Ohm.
WARNING: Make sure the main 120/208/240 V breaker at the circuit breaker panel is
switched off before you connect the AC terminal block.
To wire the SunPower Inverter to the main utility grid, follow the steps outlined below (Refer to
Figure 7):
1. Run the conduit from the main breaker panel to the bottom of the SunPower Inverter
and insert the fitting in the center opening of the SunPower Inverter, fastening with a
locking nut.
To Next Page
Loading...
Need help?
General