// Medium-voltage substation

MV Substation Transformers

Liquid-filled substation transformers, 5 to 35 kV class, for utility, industrial, and data center primary distribution. Close-coupled to switchgear or throat-connected, built to IEEE C57.12.00.

global manufacturing
Close-coupled connection
12-16 weeks
3 year warranty
MV Substation Transformers
Overview

Sized to the load, delivered to the schedule.

MV substation units are where lead times go to die at legacy OEMs. Bet Power quotes from real factory capacity, not a queue, and commits to a ship date at order.

We coordinate throat dimensions, bus, and terminations with your switchgear so the package lands as one lineup, not three shipments that don't fit.

< 30 minQuote turnaround
14–18 weeksTypical lead time
30 MVAMaximum rating
Key specifications
  • Rating500 kVA – 30 MVA
  • Primary5 – 35 kV class
  • Secondary480 V – 15 kV
  • TypeLiquid-filled (mineral oil / FR3)
  • CoolingONAN / ONAF
  • StandardsIEEE C57.12.00, C57.12.90, ANSI, UL / cUL options
  • Lead timeBuilt to order: 14 – 18 weeks
Specifications

What ships standard. What you can add.

Every unit is built from your spec. The lists below are the baseline and the most common options; anything else, send the drawing.

Standard specifications

Included on every mv substation transformers order.

  • Aluminum windings
  • Silicon steel core
  • De-energized tap changer (±2 × 2.5 %)
  • Air-filled throat or bus duct flange
  • Cover-mounted bushings
  • Liquid level, temperature & pressure gauges
  • Pressure relief device
  • Drain & sample valve
  • Ground pads
  • Lifting lugs & jacking pads
  • Factory test report per IEEE C57.12.90
  • 65 °C rise, 60 Hz

Optional specifications

Quoted line by line, no packages.

  • Load-tap changer
  • FR3 natural ester fluid
  • Forced-air fan cooling
  • Winding temperature indicators & alarms
  • Surge arresters
  • Copper windings
  • Seismic qualification (IBC / OSHPD)
  • Close-coupled MV switchgear
  • Stainless steel tank
From spec to energization

Five steps. Five teams.

A dedicated team owns each stage, from the first quote through the life of the unit.

01Sales

Request or build your quote

Send a spec or use Build a Quote. Pricing back in less than 30 minutes.

02Engineering

Start drawings

Our engineering team turns the quote into approval drawings and submittals.

03Project Management

Weekly build updates

Your project manager reports manufacturing progress every week until it ships.

04Logistics

Coordinate delivery

In-house logistics desk, staffed 24/7, schedules boats, trucks, and delivery timelines.

05Post-Sales

Commission and support

Post-sales team on call through installation, commissioning, and the life of the unit.

Send us a spec. Get a number back today.

MV Substation Transformers quoted in under 30 minutes. Built for speed, priced for reality.