SMA STP 50-40 Operating Manual page 39

SMA Solar Technology AG
3. If the enclosure lid of the AC Connection Unit is
mounted, remove all 10 screws of the enclosure lid
using a Torx screwdriver (TX25) and remove the
enclosure lid towards the front.
4. Remove the adhesive tape from the enclosure opening for the AC connection.
5. Insert the cable gland M63 into the opening and
tighten it with the counter nut from the inside.
6. Thread the AC cable through the cable gland into the AC Connection Unit. If necessary,
slightly loosen the swivel nut of the cable gland. In case of AC cables that require a clamping
area < 35 mm, replace the seal insert of the cable gland M63 by the seal insert with reduced
clamping range.
7. Dismantle the AC cable.
8. Strip off the insulation of L1, L2, L3, N and PE by 30 mm.
9. Connect the grounding conductor to the ground
terminal. Use a Torx screwdriver (TX 25) to slightly
loosen one of the screws with which the clip and
connection plate are connected to the ground
connection and to completely remove the other
screw. Then place the grounding conductor onto the
connection plate, route the clip via the grounding
conductor and tighten both screws with a Torx
screwdriver (TX 25) (torque: 6 Nm).
10. Ensure that the conductor is on the connection plate.
11. Connect L1, L2, L3 and, if necessary, N to the
terminals according to the label. To do so, position
each conductor as far as they will go into the
corresponding terminal and tighten the screw of the
terminal using an Allen key (AF 8, length: 50 mm)
(20 Nm torque for a conductor cross-section of
35 mm² to 95 mm²; 30 Nm torque for a cable
cross-section of 120 mm²).
Operating manual
6 Electrical Connection
10x
L 1
L 2
L 3
N
L 1
2
L 2 1
L 3
N
STP50-4x-BE-en-23 39