« What if I cut switchboard TGBT-2 for six hours? »
ExampleRisk High
Two chiller units lose their backup power during the work.
Chain of consequences
TGBT-2 cut
Chillers 1 and 2 without backup
Manual switchover in 40 minutes
Hypothesis
Server room above 32 °C
Hypothesis
What the answer rests on
single-line-diagram-v7.pdf
sheet 4, backed-up feeders
RE: weekend on-call
manual switchover takes 40 min
supervision · 90 days
both units run continuously
What you can do
- Switch to TGBT-1 before the cut
- Move the work outside the heating period
Confidence
82 %
Two sources out of three are less than six months old.