Introduction
Overview
This guide demonstrates how to replace a power shelf in an Open Rack. == Acronyms and Terms == * AC - Alternating Current * DC - Direct Current * Tap Box - A service box with electrical interconnects. Tap boxes typically include circuit breakers. === Additional Notes === Safety: To prevent injury or death, it is crucial to de-energize the Open Rack's bus bars.
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De-energize the rack.
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Disconnect the rack's AC and DC circuit from your facilities electrical tap box.
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Verify that no voltage is present on the rack's DC power rail before proceeding!
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Do not touch the bus bars before removing power from the rack!
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The power cable is located at the rear-right of the Open Rack.
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Engage the two plastic clips on the power cable and disconnect it.
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Make sure there is not live power on the bus bars before proceeding with this procedure.
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Loosen the three thumbscrews securing the bus bar lead shrouds to the rack.
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Remove the bus bar lead covers.
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Go to the front of the Open Rack.
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Disconnect and remove all power supply units located on the front of the rack.
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This step further reduces potential of electrical shock risk.
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Go to to the rear of the Open Rack.
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Do not touch the bus bars.
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Remove the two Phillips #2 screws securing each lug cable to the Open Rack.
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Some models have 5mm hex bolts. A 5mm hex wrench will be required to remove these bolts.
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Do not touch the bus bars.
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Continue disconnecting the left and right lug cables.
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There are six lug cables that that should be disconnected form the rack.
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Locate the retention tab at the top of the power module unit.
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Press the retention tab down and pull the power supply outwards to remove it.
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Remove all of the power supplies and place aside for later installation.
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Remove the Phillips #2 screw located on each side of the power shelf.
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These are safety screws to secure the power shelf. There are two safety screws in total.
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Press the two shelf retention tabs inwards.
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After sliding the shelf out about 8cm, press the tabs inwards again to avoid contact with the rack chassis.
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Place your hand underneath the shelf to counter the weight of the shelf.
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Move the shelf to a workbench.
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Disconnect the power lug cables using a 5mm Allen wrench.
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There are six lug cables and twelve screws.
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Insert the shelf into the rack.
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Locate and press two tabs on each side of the power shelf.
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Continue sliding the shelf into the rack.
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The retention tabs will lock and make a distinctive 'click' when the shelf is secure.
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Screw in the two safety screws that were previously removed.
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Do not touch the bus bars.
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Connect the lug cables that were previously disconnected.
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Some models have 5mm hex bolts. A 5mm hex wrench will be required to remove these bolts.
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There are a total of six lug cables to connect.
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Do not touch the bus bars.
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Install the three bus bar lead covers that were previously removed.
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Install all of the power supply units that were previously removed.
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The power supply is seated correctly when the retention tab snaps upward.
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Do not touch the bus bars.
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Connect the power cable to the power shelf.
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This work is licensed under a Creative Commons Attribution 4.0 International License.
This work is licensed under a Creative Commons Attribution 4.0 International License.
