5.7 Connecting AC Power Cables
Precautions
A three-phase AC switch shall be installed on the AC side of the Smart PCS. To
ensure that the Smart PCS can be safely disconnected from the power grid when
an exception occurs, select a proper overcurrent protection device in compliance
with local power distribution regulations.
● Do not connect loads between a Smart PCS and an AC switch that directly
connects to the Smart PCS. Otherwise, the switch may trip by mistake.
● If an AC switch is used with specications beyond local standards, regulations,
or the Company's recommendations, the switch may fail to turn o in a timely
manner in case of exceptions, causing serious faults.
Each Smart PCS shall be equipped with an AC output switch. Multiple Smart PCSs
shall not connect to the same AC switch.
● The cable outer diameter can be measured using the ruler sticker in the
maintenance compartment.
● If a cable has a jacket, ensure that the jacket is in the maintenance
compartment.
● Ensure that the AC power cables are connected securely. Otherwise, the Smart
PCS may fail to operate, or be overheated in operation due to unreliable
connection, which will damage the terminal block.
● Do not pull the cables horizontally after they have been secured, as this may
damage the wiring terminals.
● The AC power cables to all Smart PCSs in an array shall be connected in the
sequence of L1, L2, and L3. The phase sequence shall be consistent with that of
the transformer station.
Step 1 Prepare cables by referring to the section Crimping an OT or DT Terminal.
Step 2 Remove a rubber ring based on the cable diameter range. Cut o the joints
between rubber rings using scissors and then remove the rubber ring. All rubber
rings are removed in the same way.
LUNA2000-200KTL-H1 Smart Power Control System
User Manual 5 Cable Connection
Issue 08 (2024-01-23) Copyright © Huawei Technologies Co., Ltd. 53
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