Huawei UPS5000-E-400K-SM User Manual page 14

UPS5000-E-(350 kVA-800 kVA)
User Manual (50 kVA Power Modules)
Fuse
If a fuse needs replacing, ensure the new fuse is of the same type and specifications so that the
system runs safely.
Backfeed Protection Dry Contact
The UPS can be configured with a backfeed protection dry contact to work with an external
automatic circuit breaker, preventing the voltage from flowing back to input terminals over
static bypass circuits. If device installation and maintenance personnel do not need to use
backfeed protection, paste labels on the external bypass input circuit breakers informing that
the circuit is connected to the UPS. Disconnect the device from the UPS before performing
operations on the circuit.
Electrostatic Discharge
Static electricity generated by human bodies may damage the electrostatic-sensitive
components on boards, for example, the large-scale integrated (LSI) circuits.
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Figure 1-1
Figure 1-1 Wearing an ESD wrist strap
Issue 05 (2018-01-08)
Wear a pair of ESD gloves or a well-grounded ESD wrist strap when touching the device
or handling boards or application-specific integrated circuits (ASICs).
When holding a board, hold its edge without touching any components, especially chips.
Package boards with ESD packaging materials before storing or transporting them.
shows how to wear an ESD wrist strap.
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1 Safety Precautions
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