SMA SC 250U - Manual (Page 57)

SMA America, LLC 6 Electrical connection
Installation Guide DISU_SCUS-IA-IUS111711 57
6.6 Closing the Disconnect Unit
☐ The handles on the front plate of the enclosure must be set to ”Off”, so that the shafts can snap
in.
☐ The 2 mounting clamps for the front plate of the enclosure must be set to the correct position
(see figure below). The 2 mounting clamps are moveable and must be arranged
11
3
⁄
4
in. … 1 ft. 3
3
⁄
4
in. (300 mm … 400 mm) from the sides.
Figure 44: Position of the mounting clamps.
2. Connect the ground strap from the bottom left
corner of the Disconnect Unit to the front plate of
the enclosure. Fasten the screw with a torque of
70 in‒lb. (8 Nm).
1.
$"65*0/
Danger of crushing
Take into account the heavy weight of the front plate of the enclosure.
• Two persons are needed to move the front plate of the enclosure to the Disconnect Unit.
• Make sure that one person always holds the front plate of the enclosure while the other
person performs work at it.
• Hold the front plate of the enclosure with 2 hands and move it to the front of the
Disconnect Unit. The distance between the Disconnect Unit and its front plate must be
approximately 8 in. (200 mm).
DISCO NNEC T UNIT SMA