NR/L2/SIGELP/50000/MODA ISSUE 2
Inspection and Maintenance Periodicities (Including Risk Based Maintenance Criteria) for Signalling Power Distribution Equipment above 175 Volts - This standard should only be used for reference to ensure 'The Control of Risk' until the compliance date of its replacement standard is reached, upon which this standard will be withdrawn. The development of all new processes and procedures should be to the replacement standard
| Organization: | NR |
| Publication Date: | 4 September 2021 |
| Status: | active |
| Page Count: | 9 |
scope:
This module defines the minimum inspection and maintenance frequencies for the tasks contained within work instructions referenced from NR/L3/SIGELP/50001.
This module also contains the criteria for the application of risk based maintenance on signaling power supply equipment above 175 V AC.
This module affects the following signalling power supply equipment on Network Rail managed infrastructure:
• Signalling Power supply equipment above 175 V AC in equipment housings. Including FSPs, location cases, relay rooms, REBs, etc.
• Signalling Power supply cabling and cable routes.
• Insulation Monitoring equipment on signal power supplies above 175 V AC.
• Interrupter cabling.
• Temporary protective measures.
• Electronic Protection Relays installed on signalling power supply equipment above 175 VAC.
• Distribution Interface Transformer Equipment
NOTE: The maintenance of Principal Supply Points is excluded from this document.
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