SMA America, LLC
Electrical Connection
SB50US-80US-IA-en-36
SB50US-80US-IA-en-36
57
6.9 Closing the DC Disconnect
.
1. Mount the cover onto the DC disconnect and insert
the rotary handle. Turn the rotary handle to position
"0".
2. Tighten the screw on the right side of the rotary
handle. Use a cross-head screwdriver (screw used:
UNC no. 5x
3
⁄
4
in. cross-head, flat-head).
3. Insert the screw and conical spring washer of the
DC disconnect into the underside. Tighten the screw with a torque of 44 in-lb. (5 Nm).
All string fuses must be securely mounted
The toothing of the conical spring washer must point toward the cover for the DC
disconnect to be grounded
1
3
2
4
GROUNDING
ELECTRODE
CONDUCTOR
COMBINED
1
2
3
4
UNGROUNDED
GROUNDED
L1 L2 N
1
3
2
4
COMBINED
1
2
3
4
UNGROUNDED
GROUNDED
