DE-ENERGIZED SYSTEM INSPECTION

ELECTRICAL HAZARD

• Shutdown and lockout and tag-out the AES Cabinet as required before performing the following tests.

• Service and maintenance activities can be performed by Qualified Service Operators or other trained personnel, provided all tasks follow the procedures and safety guidelines outlined in this document and other supporting documents, such as 805-0092 AES 210HV Installation and Commissioning Manual, 805-00104 AES Cabinet Outdoor C&I Installation and Commissioning Manual, and 805-0094 AES Cabinet Operation and Maintenance Manual.

Failure to follow these instructions may result in death or serious injury.

Cabinet ID:

Technician:

Date:

Confirm there is no deformation, scratches, rust, other defects in appearance

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Confirm there is no abnormality at welded seams, no peeling of paint, bubbles, and the color is consistent.

• If there is paint that is peeling, refer to the 805-0094 AES Cabinet Operation and Maintenance Manual for paint correction instructions.

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Confirm the smoke sensor, temperature sensor, and fire extinguishing device (Aerosol) are mounted securely and the tightening marks drawn with a marker for the screws have not shifted.

• Wiggle smoke alarms, temperature alarms, and fire extinguishing devices by hand to see if they are secure.

Fire Suppression System

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Check that the DC cables are properly connected.

• Gently pull on the DC cable without opening the connector buckle. Do not pull it with force.

  • The purpose is to verify wiring is secure.

  • Open the connector buckle when removing the cable.

DC cable connections

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Check that the communication cables are properly connected.

• Gently pull on the communication cable without opening the connector buckle. Do not pull it with force.

  • The purpose is to verify wiring is secure.

  • Open the connector buckle when removing the cable.

Communication Cable Connections

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Check that the auxiliary power cables are properly connected.

• Gently pull on the auxiliary power cable connector without opening the connector buckle. Do not pull it with force.

  • The purpose is to verify wiring is secure.

  • Open the connector buckle when removing the cable. 

Auxiliary Power Cable Connections

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Visually inspect the MSD (Manual Service Disconnect) of each battery pack.

• Check for any discoloration.

• Check if MSD is loose.

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Check the positive insulation resistance value

• Place your insulation meter (red +) test lead on the battery rack main positive terminal, (black -) test lead on the cabinet ground screw location.

  • Insulation meter settings: 1,000 Vdc, test time 60 s, insulation resistance value upper limit ∞, insulation resistance value lower limit 100 MΩ.

  • The measured insulation resistance value should be > 100 MΩ.

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Check the negative insulation resistance value

• Place your insulation meter (red +) test lead on the battery rack main negative terminal, (black -) test lead on the cabinet shell.

  • Insulation meter settings: 1000 Vdc, test time 60 s, insulation resistance value upper limit ∞, insulation resistance value lower limit 100 MΩ.

  • The measured insulation resistance value should be > 100 MΩ.

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Inspect the HVB for physical damage, corrosion, deformation, and signs of overheating.

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Confirm all cables are securely fastened.

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Remove and inspect the High Voltage Box every 5 years, only when replacing the UPS battery.

Remove the High Voltage Box (HVB) from the AES Cabinet.

• Check all visible cable connections within the HVB for integrity and security.

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• Inspect HV fuses, relays, CAN connections, and terminal connections.

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