Replacing An Spd - Huawei FusionModule1000A20 Maintenance Manual

FusionModule1000A20 Prefabricated All-in-One
Data Center
Maintenance Guide

6.1.2.5 Replacing an SPD

Prerequisites
Do not replace an SPD during a thunderstorm.
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Impact on the System
None
Preparations
Tools: Phillips screwdriver, flat-head screwdriver, electroprobe
Material: spare SPD
Documents: PDC user manual
Skill requirement: electrician's work permit
Procedure
Step 1 Remove the protective panel of the SPD.
Avoid touching any charged body when removing the panel.
Step 2 Switch off the SPD circuit breaker.
Step 3 Detect the L1, L2, L3, and N voltages to the PE using an electrical tester pen, and
verify that the faulty SPD has no voltage before replacing the faulty SPD.
6-5
Figure 6-5 Detecting the voltages
Issue 03 (2022-12-15)
D ANGER
An SPD is faulty.
A spare SPD of the same model is available and functional.
CA UTION
shows how to detect the voltages.
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6 Parts Replacement
Figure
79