SMA SC 250U Installation - Manual (Page 16)

Mounting the components SMA America, LLC
16 SC250U_GFDI-IUS101711 Installation Guide
5.2 Attach the cable to the GFDI fuse
1. Attach the cable from the GFDI fuse to busbar
WL‒.
2. Tighten the screw with a torque of 55 ft-lb.
(74 Nm).
5.3 Attach markings
1. Attach the label DC– to connection terminal X2
2. Position label „max. 600V DC PV–“ over
„max. 600V DC PV+“.
3. Position label „This Unit is grounded at the positive
DC leg.“ over „This Unit is grounded at the negative
DC leg.“
4. Position label „max. 600V DC PV+“ over
„max. 600V DC PV–“.
5. Atach the label DC+ to busbar WL–.
6. Atach the label WL+ to busbar WL–.
7. Atach the label DC– to busbar WL+.
8. Atach the label WL– to busbar WL+.
☑ The markings are attached.
5.4 Check all connections
1. Make sure that all electric and non-electric connections are attached securely.
2. Make sure that all screws are tightened with the specified torques.