Connecting An Ac Output Power Cable - Huawei SUN2000-20KTL-M3 User Manual

SUN2000-(20KTL, 29.9KTL, 30KTL, 36KTL, 40KTL)-
M3
User Manual

5.4 Connecting an AC Output Power Cable

Precautions
An AC switch must be installed on the AC side of the inverter to ensure that the
inverter can be safely disconnected from the power grid.
● Do not connect loads between an inverter and an AC switch that directly
connects to the inverter. Otherwise, the switch may trip by mistake.
● If an AC switch is used with specifications beyond local standards, regulations,
or the Company's recommendations, the switch may fail to turn off in a timely
manner in case of exceptions, causing serious faults.
● Each inverter shall be equipped with an AC output switch. Multiple inverters
shall not connect to the same AC switch.
● Cables must be vertically routed into combiner boxes, PV terminals, and other
wiring terminals to avoid damage caused by horizontal stress on the terminals,
which is not covered under the warranty.
● If the external AC switch provides the leakage protection function, the rated
residual operating current must be greater than or equal to 300 mA.
● If multiple inverters are connected to the master leakage protection device
through their external AC switches, the rated residual operating current of the
device must be greater than or equal to the number of inverters x 300 mA.
● Use a socket wrench and extension rod to connect the AC power cable. The
extension rod must be longer than 100 mm.
● Reserve sufficient slack for the PE wire to ensure that the PE wire is the last
cable bearing the force when the AC output power cable is subject to a pulling
force due to force majeure.
● Do not install third-party devices in the AC connection box.
● You need to prepare M8 OT terminals by yourself.
● If the AC MBUS is used, multi-core cables are recommended, supporting a
maximum communication distance of 1000 m. To use other types of AC power
cables, contact the Company's technical support.
Issue 18 (2024-03-10)
WARNING
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