- 1Transformer
- 2HV disconnect & breaker
- 3LV switchgear house
- 4Gooseneck trailer
- 5Outrigger jacks
Portable Substation & Power Skid
A substation on wheels or a skid: high-voltage switching and protection, a transformer and low-voltage switchgear, wired and tested as one package. For outages, emergencies, mines and temporary sites — up to 12.5 MVA.
A Substation That Shows Up on a Truck
When a substation transformer fails, or a planned upgrade needs the old one out of service, a portable substation keeps customers on. It arrives as one trailer or skid with everything already connected: incoming disconnect and breaker, surge arresters, the transformer and outgoing low-voltage gear. Crews set it, land the cables, test and energize. Skid versions suit mining and oil & gas sites that move every few months.
- HV disconnect, breaker and surge arresters on board
- Dual-voltage windings to fit more than one system
- Outgoing LV breakers or switchgear house
- Trailer (road-legal) or oilfield-style skid
- Factory-wired protection and metering
- Tested as a complete package before it ships
Portable Substation & Power Skid in plain words
What it does
A complete substation — disconnect, protection, transformer and low-voltage gear — built on a trailer or skid so it can be moved in, connected and energized quickly.
Pick it when
- You need power during a planned substation outage or after a failure
- The site is temporary, remote or keeps moving (mining, construction, oil & gas)
- You want one package that arrives tested and ready to connect
Better choice if…
The installation is permanent and stays put
See the Unit Substation →What's Included
- Compact, high-capacity transformer with radiators sized for the trailer envelope
- Dual- or multi-voltage primary and secondary
- Incoming air-break disconnect and circuit breaker or fused switch
- Station-class surge arresters
- Protection relays, CTs and revenue metering provisions
- LV switchgear house with lighting and heat
- Grounding grid connections and ground studs
- Outrigger jacks and lifting points
- +Fan cooling for higher rating
- +Remote monitoring and SCADA
- +Generator connection cabinet
- +Heated, insulated equipment house for winter
- +Cable reels and quick-connect terminations
Full Specifications
| Parameter | Value |
|---|---|
| Rating | 1 – 12.5 MVA |
| Primary voltage | Up to 72 kV class; dual voltage available |
| Secondary voltage | 600 V to 34.5 kV; dual voltage available |
| Mounting | Road-legal trailer or skid |
| Switching | Air-break disconnect, breaker or fused switch |
| Cooling | ONAN / ONAF |
| Fluid | Type II mineral oil, or FR3 natural ester (less-flammable, biodegradable) |
| Tests | Transformer routine tests plus complete package functional testing |
Built to Standard
Where It's Used
- Utility substation maintenance and emergency backup
- Mining camps and moving pit operations
- Oil & gas well sites and pipeline stations
- Large construction projects
- Events and temporary industrial power
From design and specification through factory testing, commissioning, and ongoing maintenance — CANDRON delivers at every phase.
- Engineering drawings and coordination studies
- Factory acceptance testing (FAT) with full reports
- Site commissioning and protection settings
- Spare parts, training, and maintenance support
Common Questions
Choose a trailer when the unit will move often by road and must be energized fast. Choose a skid when it moves less often, by crane or winch truck, and sits on a prepared pad for months at a time.
Yes — dual- or multi-voltage windings let one portable substation connect to more than one primary and secondary voltage, which is how utilities get the most use out of one unit.
Ready to Spec
Your Project?
Our engineering team responds with specs, lead times, and pricing the same day. Tell us what you need:
- MVA rating
- Primary and secondary voltage(s)
- Trailer or skid
- Switching and protection required
- Where it will be used and moved
- Delivery date
Send us your project details and we'll respond with a price, lead time, and any clarifying questions — typically within a few hours.
Request a Quote →Or call +1 (647) 616-2595