500 kVA transformer: price, load and use
A 500 kVA transformer serves about 400 kW. At this size the job is a full indoor or outdoor substation: HT switchgear, metering as the utility requires, a large LT panel and usually power factor correction. Cost drivers and approvals matter more than the transformer price alone.
- Load it serves
- about 400 kW
- Installed price range
- On written quote
Load it serves
At 0.8 power factor, a 500 kVA transformer delivers about 400 kW. We usually plan for 20–25% headroom so it doesn't run hot at peak and you have room to add machines.
Typical use
Larger factory, hospital, commercial or mixed-use building.
Installed cost: what you pay for
A 500 kVA quote should list each of these items. If a line is missing, ask why.
- 1
Transformer
Brand, winding material, tested losses, warranty.
- 2
HT side
VCB, RMU or drop-out fuse, HT cable and metering as the utility requires.
- 3
LT panel
Main breaker, outgoing feeders, meters and protection.
- 4
Cables and termination
Correct size for the current, with proper glands and lugs.
- 5
Civil work
Plinth, room or fence, cable trench and oil soak pit where needed.
- 6
Earthing
Separate earth pits for the neutral and the body, tested and recorded.
- 7
Approvals and utility work
OCEI approval and the utility's connection process.
- 8
Testing and commissioning
Insulation, ratio and earth tests, with a written report.
Room and plinth space
At this size you need a substation room or a fenced outdoor yard for HT switchgear, the transformer and the LT panel, with ventilation, cable trenches and fire safety. We prepare the layout drawing.
Approvals needed
- Utility application for the new or increased connection
- Substation design and drawing approval from the Office of the Chief Electric Inspector (OCEI)
- Inspection before the supply is switched on
- Building owner or landlord consent where the site is rented
Compare nearby sizes
Frequently asked questions
How much load does a 500 kVA transformer run?
About 400 kW at 0.8 power factor. In practice we keep 20–25% headroom, so plan for a steady demand a little below that.
Can I add more load later?
Yes, if you leave headroom now. If you expect to grow, compare the next size up. A transformer that is far too large still has fixed losses every month.
What approvals does a 500 kVA installation need?
Usually a utility application for the connection and substation approval from the Office of the Chief Electric Inspector (OCEI), followed by inspection before switch-on. We prepare and file the paperwork with you.
Is the price on your quote fixed?
Yes. Our written quote lists every line item with brands and specifications. It only changes if you change the scope.