Notice on Bare Power Terminals Configured for OptiX OSN 3500

Abstract: OptiX OSN 3500 type-III cabinets (BOM: 02113256) started to be manufactured and delivered by India Supply Center from September, 2011. Cabinet process inspection shows that the cabinet power OT terminals delivered by India Supply Center are not fully wrapped in the heat shrink tubing. The entire cabinet test shows that in all power-on scenarios, once configured, bare power terminals may spark, burning themselves, burning the cabinet, or even causing human injuries. Idle power terminals must be provided with insulation protection and cannot be bare ones.

[Problem Description]
Trigger conditions:
OptiX OSN 3500 type-III cabinets (BOM: 02113256) manufactured and delivered by India Supply Center have idle bare power terminals.
Fault symptoms:
In all power-on scenarios, once configured, bare power terminals may spark, burning themselves, burning the cabinet, or even causing human injuries.
Identification methods:
Once bare power terminals spark, power terminals are burnt, or the cabinet is burnt upon power-on, query the cabinet BOM code. The problem is identified if the cabinet BOM code is in the delivery list. (For the delivery list, refer to the following attachments.)

[Root Cause]
Cabinet power terminals must be wrapped in insulating bags. However, cabinet power terminals provided by India Supply Center are not wrapped in insulating bags, since related regulations are not synchronized to India Supply Center.

[Impact and Risks]
In all power-on scenarios, once configured, bare power terminals may spark, burning themselves, burning the cabinet, or even causing human injuries. Therefore, rectification is required for all idle and bare power terminals.
Mandatory rectification: (In the case of a live network, detailed rectification requirements are specified in the corresponding rectification notice that is to be released by the product line. In the case of new network construction, power terminals on all involved cabinets must be replaced before the project delivery.)

[Measures and Solutions]
Recovery measures:
After identifying this problem based on the cabinet BOM code, visit the site and wrap the bare power terminals with adhesive PVC insulation tape. The operations are as follows:
Step 1 Ensure that the circuit breaker for the power cable unconnected to a subrack is in closed state. If the circuit breaker is in open state, close it and perform the subsequent operation.
Step 2 Wear gloves and fully and securely wrap the bare power terminals with PVC insulation tape.

—-End
Remarks:
Check for the system control board BOM code in the contract (for the system control board delivery list, refer to the following attachment), locate the system control board based on the BOM code, and determine the location of the cabinet based on the location of the system control board.
Workarounds:
None
Solutions:
Frontline engineers need to perform the rectification in time according to the corresponding rectification notice. In the case of a new network construction project, they need to complete rectification for all involved cabinets before the project delivery.