Step 3 Measure the L1, L2, L3, and N voltages to PE using an electroprobe, as shown in
Figure 6-4, and verify that the faulty SPD has no voltage before replacing the
faulty surge protection module.
Figure 6-4 Measuring voltages
Step 4 Hold the faulty surge protection module and pull it out, as shown in Figure 6-5.
During replacement, do not touch the energized components in the power
distribution subrack.
Figure 6-5 Replacing a surge protection module
Step 5 Install the new surge protection module.
Step 6 Reinstall the protective panel for the SPD, and switch the SPD circuit breaker to
ON.
Step 7 Check whether there are alarms on the ECC800-Pro. If there is no alarm, the surge
protection module is functional.
----End
FusionModule800 Smart Small Data Center
User Manual 6 O&M
Issue 01 (2021-02-05) Copyright © Huawei Technologies Co., Ltd. 402
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