Question

RMU Switchgear Fault Investigation: The HV RMU switchgear supplying the transformer has tripped, causing a power outage. Tasks: a) Systematically troubleshoot this fault by detailing two actions for each of the following steps: · Observation · Problem Isolation · Identifying Possible Causes · Determining the Most Probable Cause · Testing and Repair Verification (5 marks) b) Name one critical safety document required before inspecting the tripped switchgear and briefly explain its purpose. (1 mark) c) The trip coil is suspected to be faulty. List two specific measurements that would verify its condition. (2 marks) d) Compare the hospital’s current time-based maintenance with condition-based maintenance (CBM). Provide: · One advantage of switching to CBM · One limitation of the current time-based approach. (2 marks)

          RMU Switchgear Fault Investigation:
The HV RMU switchgear supplying the transformer has tripped, causing a power outage.
Tasks:
a)      Systematically troubleshoot this fault by detailing two actions for each of the following steps:
·           Observation
·           Problem Isolation
·           Identifying Possible Causes
·           Determining the Most Probable Cause
·           Testing and Repair Verification (5 marks)
b)      Name one critical safety document required before inspecting the tripped switchgear and briefly explain its purpose. (1 mark)
c)      The trip coil is suspected to be faulty. List two specific measurements that would verify its condition. (2 marks)
d)      Compare the hospital’s current time-based maintenance with condition-based maintenance (CBM). Provide:
·           One advantage of switching to CBM
·           One limitation of the current time-based approach. (2 marks)

Added by Shane Y.

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