Not every isolation transformer belongs in a clean, climate-controlled electrical room. Outdoor equipment, corrosive facilities, dusty plants, washdown areas,...
Transformer Solutions
for Infrastructure Projects
Roads, bridges, transit systems, water treatment plants, pumping stations, and utility networks form the backbone of Canadian communities — and every one of them depends on reliable electrical power. Transformer Source supplies outdoor-rated, high-reliability dry-type transformers for the full spectrum of civil and public infrastructure projects, from remote pump stations to major transit corridors.
- CSA & UL Certified
- Ships from Canadian Stock
- 3 kVA – 1,000 kVA Range
- Custom Configurations Available
Powering Canadian Infrastructure
Infrastructure projects span some of the most demanding electrical environments in any sector — remote locations with no climate control, outdoor installations exposed to Canadian winters, corrosive environments in water and wastewater treatment, and critical public safety applications where power reliability is non-negotiable. The transformer at a remote pumping station, a transit traction substation, or a highway tunnel ventilation system must perform reliably for decades with minimal maintenance.
Transformer Source supplies dry-type transformers specified by engineers and prime contractors on infrastructure projects across Canada. Our units are CSA certified, available in outdoor-rated and corrosion-resistant configurations, and stocked in common sizes for fast delivery when project schedules demand it.
Key Infrastructure Power Challenges We Solve:
- Outdoor and remote installations: NEMA 3R and encapsulated units for unmanned pump stations, lift stations, and remote utility sites with no climate control
- Water and wastewater treatment: Corrosion-resistant enclosures for chlorine, hydrogen sulphide, and chemical exposure in treatment plant electrical rooms
- Transit and rail: Transformers for station auxiliaries, ventilation, escalators, fare systems, and communications power along transit corridors
- Motor starting: Large VFD and across-the-line pump motor starting at water and stormwater pumping stations
- Voltage conversion: Step-down from utility service voltages to distribution voltages for infrastructure facility power systems
- Seismic compliance: BC and Alberta projects require seismic-rated transformer mounting for all infrastructure installations
- Long service life: Infrastructure transformers are expected to serve 25–40 years in the field — quality of specification matters more than initial cost
Infrastructure Sectors We Serve:
- Water Treatment & Distribution
- Wastewater Treatment & Pumping Stations
- Stormwater & Flood Control
- Transit: LRT, Subway & Bus Rapid Transit
- Roads, Highways & Tunnel Ventilation
- Bridges & Marine Infrastructure
- Telecommunications & Broadband Infrastructure
- Utility Distribution & Substations
- Renewable Energy: Solar, Wind & Hydro Facilities
Recommended Transformers for Infrastructure
The following transformer types are most commonly specified for infrastructure projects. Filter by kVA, voltage, or enclosure using the product search.
Isolation Transformers
3kVA to 750kVA Capacity
Encapsulated Isolation Transformers
0.25kVA to 150kVA Capacity
Autotransformers
3kVA to 1000kVA Capacity
Encapsulated Autotransformers
3kVA to 300kVA Capacity
Control Transformers
25VA to 5000VA Capacity
Motor Starters
10HP to 500HP Capacity
Mini Power Centers
5kVA to 45kVA Capacity
Recommended Specifications for Infrastructure
Use the following as a baseline specification reference. Infrastructure transformer specifications must be confirmed with the engineer of record and the authority having jurisdiction on each project.
Remote Lift Station / Pump Station (small) | 15 – 75 kVA |
Municipal Pump Station (medium) | 75 – 300 kVA |
Large Water / Wastewater Pumping Station | 150 – 750 kVA |
Water Treatment Plant (full facility) | 300 – 1,000 kVA+ |
Transit Station Auxiliary Power | 45 – 225 kVA |
Tunnel Ventilation System | 75 – 500 kVA |
Highway / Road Lighting Control | 15 – 75 kVA |
Traffic Management Centre | 30 – 150 kVA |
Airport Ground Support | 75 – 500 kVA |
Telecom / Broadband Hub | 15 – 75 kVA |
Renewable Energy Facility Aux Power | 30 – 150 kVA |
Infrastructure transformers are typically sized conservatively — 125% of peak demand is standard. For unmanned remote sites, size for the worst-case scenario with no operator intervention available.
Primary (Input) | 600V, 575V, 480V, or higher utility service voltage (confirm with utility) |
Secondary — Facility Distribution | 120/208V or 120/240V, 3-phase or single-phase |
Secondary — Motor Control | 480V or 208V, 3-phase for pump and fan MCCs |
Secondary — SCADA / Control | 120V or 24V single-phase isolated control power |
Remote / Rural Sites | Utility service may be 25 kV or 4.16 kV — confirm step-down requirements with engineer |
Taps | ±2.5% and ±5% — critical for remote sites with long utility service runs and variable voltage |
NEMA 1 | Conditioned electrical rooms in staffed facilities (treatment plants, transit stations) |
NEMA 3R (Rainproof) | Outdoor pad-mount and semi-exposed locations at staffed sites |
NEMA 3R + Canopy | Outdoor installations in high-snowfall Canadian locations — additional protection from accumulation |
Encapsulated | Unmanned outdoor pump stations, lift stations, corrosive environments (H₂S, chlorine), marine locations |
NEMA 4 / 4X | Wash-down areas in treatment plants, marine infrastructure, coastal high-humidity sites |
Stainless / Coated Enclosure | Highly corrosive environments — coastal salt air, chemical treatment areas |
Staffed Facility (Indoor) | Dedicated electrical room — NEMA 1, coordinate heat load with mechanical design |
Unmanned Station (Outdoor) | Encapsulated or NEMA 3R on concrete housekeeping pad — design for no-maintenance reliability |
Below Grade | Encapsulated only — sump flooding risk and high humidity in below-grade pump station wet wells |
Rooftop / Exposed | NEMA 3R minimum with canopy; wind and snow loading per local building code |
Marine / Coastal | Encapsulated or NEMA 4X with stainless hardware — salt air corrosion is severe |
Cold Climate Remote Sites | Verify cold-temperature startup rating; consider enclosure heater for extreme cold installations |
Canadian Standard | CSA C22.2 No. 47 — mandatory for all Canadian infrastructure installations |
CEC Part I | Canadian Electrical Code — governs both facility and outdoor installation requirements |
Municipal Procurement | Many municipal infrastructure projects require Canadian-certified equipment and local supply chain |
Seismic | BC, Alberta foothills, and Yukon — seismic-rated transformer mounting mandatory; specify at time of order |
Environmental Assessment | Some remote and coastal infrastructure projects require documentation of transformer materials — confirm with project EAO |
US Projects | UL 506 / UL 1561 for any infrastructure transformer shipped to or installed in the US |
K-1 (Standard) | Simple resistive and motor loads at unmanned pump stations with no VFDs |
K-4 | Mixed loads with some electronic content — transit station auxiliary, road lighting with LED drivers |
K-13 Recommended | VFD-driven pump and fan motors at water, wastewater, and HVAC systems in treatment plants and transit facilities |
Harmonic Sources | VFDs on pump and fan motors, LED roadway lighting drivers, UPS systems at SCADA facilities, transit traction power electronics |
Remote Sites | Even unmanned sites increasingly use VFD-driven pumps for energy efficiency — specify K-13 if VFDs are in the design |
SCADA & Telecom Loads | Isolated control transformers eliminate ground noise on SCADA and communications circuits |
Cold Weather | Canadian infrastructure sites can reach -40°C — specify cold-temperature rated units and enclosure heaters for remote outdoor sites |
Corrosive Atmosphere | Wastewater and water treatment: H₂S, chlorine, and ammonia attack standard enclosures — specify coated or stainless enclosures and encapsulated units |
Flooding Risk | Below-grade pump stations — encapsulated units mounted above flood level; verify with engineer |
Salt Air & Marine | Coastal BC, Atlantic Canada — stainless hardware, encapsulated or NEMA 4X, anti-corrosion coatings on all external surfaces |
Seismic | BC, Yukon, and Alberta foothills — seismic anchorage is code-required and essential for critical infrastructure reliability |
Wildlife & Insects | Remote northern sites — sealed enclosures prevent nesting; encapsulated units are the most reliable choice |
Frequently Asked Questions
What transformer do I need for a remote pump station?
An encapsulated isolation transformer may be suitable where moisture, condensation, dust, and temperature changes are concerns. Final selection depends on the load, voltage, environment, and available enclosure.
What requirements apply in water and wastewater facilities?
Transformer selection should account for humidity, condensation, process chemicals, wash-down procedures, ventilation, and corrosive gases. Compatible enclosures and materials may be required.
Do infrastructure transformers need seismic certification?
Requirements depend on the project location, building code, structural design, and procurement specifications. Equipment anchorage should be coordinated with the engineer of record.
What size transformer do I need for a municipal pumping station?
Sizing depends on the number and size of pumps, starting method, operating schedule, simultaneous demand, controls, and other facility loads.
What transformer is used for transit station auxiliary power?
Isolation transformers commonly supply lighting, ventilation, escalators, controls, communications, and general station distribution. Control transformers may serve dedicated automation and monitoring circuits.
Can these transformers be installed outdoors in northern Canada?
Outdoor and encapsulated options are available, but the transformer and enclosure must be selected for the site’s minimum temperature, moisture, snow, and maintenance conditions.
How do I specify a transformer for tunnel ventilation?
Provide the fan motor HP, voltage, starting method, number of motors, operating sequence, control loads, and emergency operating requirements. A motor-starting study may be required for large fans.
Can mini power centers be used on infrastructure projects?
Yes. Mini power centers can provide localized distribution for lighting, receptacles, maintenance areas, controls, and auxiliary loads where an integrated solution is suitable.
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Ready to Specify Your Infrastructure Transformer?
Infrastructure transformers must be right the first time — field replacements at remote pump stations, underground transit facilities, or highway tunnels are costly and disruptive. Our technical team works with engineers and contractors to specify the correct unit for every infrastructure application.
Have this information ready:
- Application type (pump station, treatment plant, transit, tunnel, remote site)
- Motor or equipment load in kW or HP, and number of units
- Primary service voltage from the utility or site distribution
- Required secondary voltage
- Outdoor or indoor, staffed or unmanned, climate-controlled or exposed
- Site location and environmental conditions (corrosive atmosphere, cold climate, seismic zone, coastal)
- Redundancy requirements and expected service life