Installing And Removing A Power Supply; Installing A Power Supply - H3C S5560S-SI Series Installation Manual

b. Use a grounding resistance tester to measure the grounding resistance of the grounding
strip, and make sure the grounding resistance is less than 1Ω.
•
If you ground the switch with a grounding conductor buried in the earth ground:
a. Use a multimeter to measure the resistance between the switch grounding terminal and
grounding point, and make sure the resistance is less than 0.1Ω.
b. Use a grounding resistance tester to measure the grounding resistance of the angle iron in
the ground, and make sure the grounding resistance is less than 10Ω. For locations with
high soil resistivity, sprinkle some resistance reducer to reduce soil resistivity or replace soil
around the grounding strip with soil with lower resistance.
For information about resistance measurement, see H3C Network Devices Lightning Protection
Guide.

Installing and removing a power supply

WARNING!
In power redundancy mode, you can replace a power supply without powering off the switch but
must follow the installation and procedures in
damage to the switch.
CAUTION:
Provide a circuit breaker for each power supply and make sure the circuit breaker is off before
installation.
This section is applicable only to the switch models that use removable power supplies. For the
switch models that use removable power supplies and the available power supplies, see hardware
information and specifications for the switch series.
Figure 20 Installation procedure
Install the power
supply
Figure 21 Removal procedure
Turn off the circuit
breaker

Installing a power supply

1. Wear an ESD wrist strap and make sure it makes good skin contact and is reliably grounded.
2. Unpack the power supply and verify that the power supply model is as required.
3. Remove the filler panel (if any) from the target slot. As shown in
screwdriver to loosen the screws on the filler panel and thread the screwdriver shaft through the
handle to pull the filler panel out of the slot.
Figure 20
Connect the power
cord
Disconnect the power
cord
23
and Figure 21 to avoid any bodily injury or
Turn on the circuit
breaker
Remove the power
supply
Figure 22, use a Phillips