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London Underground Central Line Audible Alarm Unit - Design & Replacement of Combined Power Supply / Power-Amplifier Printed Circuit Board
Descriptions
Scope
Description
The proposed tender is intended to secure LUL 92TS Central Line Audible Alarm Unit (AAU) - Design & Replacement of Combined Power Supply (PSU)/ Power-Amplifier Printed Circuit Board (PCB) updates required on the 1992 Tube Stock (92TS) Central Line of the Preliminary Market Engagement document.
Context:
TfL is exploring market interest and capability for remediation of 92TS Audible Alarm Units (AAU) by replacing the combined Power Supply Unit (PSU)/Power Amplifier Printed Circuit Board (PCB) inside each AAU, carrying out required factory and site testing, and returning fully functional AAUs for service. The AAU comprises two internal boards -
Combined PSU/Power-Amplifier PCB
Voice synthesis PCB
Failures have occurred exclusively on the Power Supply Unit (PSU)/Power-Amplifier PCB, which is no longer supported by the Original Engineering Manufacturer (OEM). Given the AAU's safety-critical function, trains cannot operate without it, making obsolescence remediation essential.
TfL intends to proceed in phases:
Phase 1 - Development of 2 prototype combined PSU/Power-Amplifier PCB units (PCB design validation, Final Acceptance Testing (FAT) and Site Acceptance Testing (SAT))
Phase 2 - Production of 18 units of combined PSU/Power-Amplifier PCB subject to prototype approval.
Phase 3 - Potential Future Demand (option) - up to 180 additional combined PSU/Power-Amplifier PCB units
Objective:
Identify suppliers with capability to design, replace, and test PSU/Power-Amplifier PCBs within existing AAU housings, while maintaining fit, form, and function equivalence.
Understand supplier approaches to obsolescence management, aiming for 15-20 years of ongoing support.
Assess capacity to deliver through a phased model: prototypes, batch production, and potential scaling.
Evaluate supplier test and assurance capability, including:
Final Acceptance Testing (FAT)
Site Acceptance Testing (SAT)
Compliance with RIA 12 and EN 50121-3-2 (EMC), and BS EN 61373 Cat 1, Class B (shock & vibration).
Gain insight into market best practice for low-volume, safety-critical electronics.
Timeline
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Tender Regions
CPV Codes
35121700 - Alarm systems
31720000 - Electromechanical equipment
60210000 - Public transport services by railways
Keywords
electromechanical equipment
mechanical-electrical unit
actuator assembly
motor-driven apparatus
industrial electromechanic
alarm systems
security alarms
intrusion detection systems
burglar alarm systems
emergency alarms
fire alarms
motion alarms
access alarms
audio alarms
security notification systems
coach maintenance
wagon repair
carriage system inspection
bogie servicing
rolling stock diagnostics
structural integrity testing
hydraulic lift checks
door mechanism maintenance
pantograph servicing
coupler alignment
city rail transit
suburban rail service
metro rail operations
transit rail commuting
passenger rail transport
rail network service
urban rail provision
rail passenger journey
public train operations
commuter rail line
Tender Lot Details
2 Tender Lots
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Possible Competitors
1 Possible Competitors
