Huawei MERC Smart PV Optimizer User Manual page 11

MERC Smart PV Optimizer
User Manual
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Grounding
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Cabling Requirements
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Issue 05 (2023-03-31)
Check equipment connections periodically, ensuring that all screws are
securely tightened.
Only qualified professionals can replace a damaged cable.
Do not scrawl, damage, or block any labels or nameplates on the equipment.
Promptly replace labels that have worn out.
Do not use solvents such as water, alcohol, or oil to clean electrical
components inside or outside of the equipment.
Do not cut the optimizer cables, as this will void the warranty.
The output wiring terminals of the optimizer are not hot-swappable. If the
terminals are hot-swapped, the optimizer may be damaged.
Ensure that the grounding impedance of the equipment complies with local
electrical standards.
Ensure that the equipment is connected permanently to the protective
ground. Before operating the equipment, check its electrical connection to
ensure that it is reliably grounded.
Do not work on the equipment in the absence of a properly installed ground
conductor.
Do not damage the ground conductor.
For the equipment that uses a three-pin socket, ensure that the ground
terminal in the socket is connected to the protective ground point.
If high touch current may occur on the equipment, ground the protective
ground terminal on the equipment enclosure before connecting the power
supply; otherwise, electric shock as a result of touch current may occur.
When selecting, installing, and routing cables, follow local safety regulations
and rules.
When routing power cables, ensure that there is no coiling or twisting. Do not
join or weld power cables. If necessary, use a longer cable.
Ensure that all cables are properly connected and insulated, and meet
specifications.
Ensure that the slots and holes for routing cables are free from sharp edges,
and that the positions where cables are routed through pipes or cable holes
are equipped with cushion materials to prevent the cables from being
damaged by sharp edges or burrs.
Ensure that cables of the same type are bound together neatly and straight
and that the cable sheath is intact. When routing cables of different types,
ensure that they are away from each other without entanglement and
overlapping.
When cable connection is completed or paused for a short period of time, seal
the cable holes with sealing putty immediately to prevent small animals or
moisture from entering.
Secure buried cables using cable supports and cable clips. Ensure that the
cables in the backfill area are in close contact with the ground to prevent
cable deformation or damage during backfilling.
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