SMA SI-TB-BOX-10 - Manual (Page 43)

SMA America, LLC 6 Electrical Connection
Installation Manual SI_TDBOX-IA-eng-IUS122211 43
5. To connect a split-phase generator, connect conductors L1 and L2 of the generator:
• Strip the insulation of insulated conductors L1 and L2 by
3
⁄
8
in. (10 mm).
• Connect the L1 conductor to the lower screw
terminal "Grid or Generator L/L1" of miniature
circuit-breaker "F6" and tighten screw
(torque: 25 in-lbs. (2.8 Nm)). Use a torque
wrench with a PZ 2 attachment or another
suitable cross-head screwdriver attachment.
• Connect the L2 conductor to the lower screw
terminal "Grid or Generator L2" of the miniature
circuit-breaker "F7" and tighten screw
(torque: 25 in-lbs. (2.8 Nm)). Use a torque
wrench with a PZ 2 attachment or another
suitable cross-head screwdriver attachment.
6.9 Connecting the Sunny Island
1. Connect each of the PE conductors to a vacant spring clamp terminal of a "Grounding"
connecting terminal plate (see Section 6.5).
2. Connect each of the N conductors to a vacant spring clamp terminal of a "Neutral N"
connecting terminal plate (see Section 6.5).
3. Connect the L conductor of the AC 1 terminal of the Sunny Island to the lower spring clamp
terminal of the "Sunny Island AC1 L" connecting terminal plate (see Section 6.5).
4. Connect the L conductor of the AC 2 terminal of the Sunny Island to the lower spring clamp
terminal of the "Sunny Island AC2 L" connecting terminal plate (see Section 6.5).
4.
Destruction of the generator due to uneven power reduction
If the connected loads are supplied by the Sunny Island, the Smartformer only transfers the
power provided by the split-phase generator via L1. This uneven power reduction may destroy
the generator.
• Make sure that the split-phase generator being used is approved for uneven power
reduction (see manufacturer's documentation for the generator).
or
• Connect 1-phase generator.
or
• Also install 1 Smartformer or an autotransformer.