DANGER
l Before maintenance, power off the power distribution box and remove all metal
ornaments, such as watches and rings from hands and wrists.
l Make sure that the new circuit breakers are switched off before being installed.
Related Tool
Crosshead screwdriver
Operation Procedure
Step 1: Check the location of the air breaker to be replaced.
Step 2: Make sure that all circuit breakers are switched off.
Step 3: Tear down the plastic panel of the power distribution box using the Crosshead
screwdriver, as shown in (1) and (2) of Figure E-15.
Step 4: Remove the air breaker to be replaced, as shown in (3) of Figure E-15.
Figure E-15 Tearing down an air breaker
Step 5: Install a new air breaker into the power distribution box, as shown in (1) of Figure
E-16.
Step 6: Re-install the plastic panel for the power distribution box, as shown in (2) and (3) of
Figure E-16.
HUAWEI NetEngine40E Universal Service Router
Hardware Description
E DPD300-4-12 Power Distribution Box, Dual-Two Inputs
Issue 01 (2015-08-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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