Huawei UPS5000-E User Manual page 21

UPS5000-E-(400 kVA-600 kVA)
User Manual (60 kVA Power Modules)
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Grounding
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Cabling
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Issue 09 (2023-07-10)
After the installation is complete, ensure that protective cases, insulation
tubes, and other necessary items for all electrical components are in position
to avoid electric shocks.
If the equipment has multiple inputs, disconnect all the inputs before
operating the equipment.
Before maintaining a downstream electrical or power distribution device, turn
off the output switch on the power supply equipment.
During equipment maintenance, attach "Do not switch on" labels near the
upstream and downstream switches or circuit breakers as well as warning
signs to prevent accidental connection. The equipment can be powered on
only after troubleshooting is complete.
If fault diagnosis and troubleshooting need to be performed after power-off,
take the following safety measures: Disconnect the power supply. Check
whether the equipment is live. Install a ground cable. Hang warning signs and
set up fences.
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.
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.
Ensure that the protective ground point of the equipment is reliably
connected to the ground screw of the metal enclosure (connection resistance:
≤ 0.1 ohms).
Ensure that the ground resistance of the system for lightning protection is less
than or equal to 10 ohms.
Do not operate the equipment in the absence of a properly installed ground
conductor.
Do not damage the ground conductor.
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.
Copyright © Huawei Digital Power Technologies Co., Ltd.
1 Safety Information
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