2
• To ensure that the inverter can be safely disconnected from the power grid when an
exception occurs, connect an AC switch to the AC side of the inverter. Select an appropriate
AC switch in accordance with local industry standards and regulations.
• Connect cables in accordance with local installation laws and regulations.
•
The cable colors are for reference only. Select appropriate cables according to the local
standards.
•
When routing signal cables, separate them from power cables and keep them away from
strong interference sources to prevent communication from being affected.
• Do not connect loads between the inverter and the 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 Huawei's
recommendations, the switch may fail to turn off in a timely manner in case of exceptions,
causing serious faults.
Each inverter must be equipped with an AC output switch. Multiple inverters cannot connect to
the same AC output switch.
Component Description Source
1 AC switch Recommended: three-phase
AC circuit breaker
Rated voltage ≥ 415 V AC
Rated current:
• 12KTL–20KTL: 40 A
• 25KTL: 50 A or 63 A
Preparations
3.1
3
Electrical Connections
•
Do not connect the neutral wire to the enclosure as a ground cable. Otherwise, electric
shocks may occur.
•
Before connecting cables, ensure that the DC SWITCH on the inverter and all the switches
connected to the inverter are set to OFF. Otherwise, the high voltage of the inverter may
result in electric shocks.
Cable Connections
3.2
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