Substation O&M at scale - what keeping 150 substations running teaches you
Building a substation is a project. Keeping 150 of them running, day after day, is a discipline. The lessons only show up at the scale where you cannot visit each site yourself.
There is a glamour to building a substation - the steel goes up, the transformer lands, the breaker closes, everyone takes a photograph. There is no glamour at all in keeping it running for the next twenty years. And yet operation and maintenance is the quieter, steadier, more compounding business of the two. When you are responsible for the uptime of more than 150 substations at a time, you learn things about reliability that no amount of construction ever teaches.
Preventive beats breakdown, always
Every O&M business eventually chooses, implicitly, between two philosophies: fix it when it breaks, or stop it breaking. The first looks cheaper on a spreadsheet and is far more expensive in reality, because a breakdown on a live substation is never just the cost of the part - it is the outage, the penalty, the emergency mobilisation and the customer's lost confidence. The second costs a little every month and saves a great deal every year.
At scale, preventive maintenance is not a preference, it is the only model that survives. A schedule that says which substation gets which check in which month, executed whether or not anything looks wrong, is what keeps 150 sites healthy. The day you start skipping the schedule because nothing is obviously broken is the day the model has already started to fail.
Spares are a strategy, not a store-room
When you run one substation, a missing spare is an inconvenience. When you run 150, your spares policy is a strategy that decides your response time across an entire region. The critical-spare list - the parts whose absence turns a two-hour fix into a two-week outage - has to be stocked ahead of need, positioned close to the sites, and replenished the moment it is drawn down. Capital tied up in the right spares is not idle; it is insurance against the most expensive thing in the business, which is downtime.
Why O&M is the business that compounds
Construction revenue is lumpy - it arrives with the project and leaves with it. O&M revenue is annuity-like: it recurs every year, grows as the installed base grows, and deepens the customer relationship with every season the lights stay on. A power-infrastructure group that treats O&M as an afterthought to EPC leaves its most durable business on the table. The group that takes it seriously builds a base of recurring, relationship-rich revenue that carries it through every down-cycle in new construction.
This essay is an in-house first draft, prepared for Mr. Paresh Ardeshna's review. It expresses general operating opinions on themes within his domain, but no specific event, customer, year or biographical claim has been verified. To be edited, signed off, or replaced before publication.
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First-generation Indian industrialist and engineer. Promoter and Director of Hi-Tech Transpower Pvt. Ltd. (est. 2005), a pan-India engineering and EPC services company in power transmission and renewable energy.