Not every isolation transformer belongs in a clean, climate-controlled electrical room. Outdoor equipment, corrosive facilities, dusty plants, washdown areas,...
Transformer Solutions
for Warehousing & Distribution
Modern warehouses and distribution centres run on electricity — conveyors, automated storage systems, forklift charging banks, dock equipment, and rapidly growing EV fleet chargers all demand reliable, properly sized power. Transformer Source supplies dry-type transformers built for the high-load, continuous-duty realities of logistics and fulfillment operations across Canada.
- CSA & UL Certified
- Ships from Canadian Stock
- 3 kVA – 1,000 kVA Range
- Custom Configurations Available
Powering Warehousing & Distribution Centres
The electrical demands of a modern warehouse bear little resemblance to those of even ten years ago. High-bay LED lighting, automated conveyor and sortation systems, robotic picking cells, large forklift charging banks, and rapidly expanding EV fleet charging infrastructure have transformed warehouses into high-density electrical loads — often fed from a single building service that must handle all of it reliably.
Transformer Source supplies the right dry-type transformer for every load in the building — from the main step-down feeding the warehouse distribution panels to dedicated units for battery charging rooms, dock leveller controls, and EV charger banks. Our units are CSA certified, in stock in common sizes, and ship fast to keep your project on schedule.
Key Warehousing Power Challenges We Solve:
- Battery & EV charging: Large forklift charging banks and EV fleet chargers are significant, non-linear loads — K-13 rated transformers prevent overheating on these circuits
- Conveyor & sortation drives: VFD-driven conveyors, sorters, and automated guided vehicles (AGVs) generate harmonics that require K-factor rated transformer feeds
- High-bay lighting: LED high-bay retrofits introduce harmonic loads on lighting circuits — specify K-4 minimum for large lighting transformer feeds
- Dock equipment: Dock levellers, dock seals, and door operators require dedicated control power and reliable 120V supply
- Voltage conversion: Imported automated storage and retrieval systems (ASRS) and overseas-sourced conveyor equipment rated at 400V or 460V need step-down to match Canadian 600V supply
- Cold storage: Refrigerated warehouse areas require transformers rated for low ambient temperatures and enclosures suited to condensation-prone cold store environments
- 24/7 operations: Fulfillment centres and distribution hubs run continuously — transformers must be sized for sustained full-load duty without thermal degradation
Warehousing & Logistics Sectors We Serve:
- E-commerce Fulfillment Centres
- Third-Party Logistics (3PL) Facilities
- Cold Storage & Refrigerated Distribution
- Grocery & Food Distribution Centres
- Retail Distribution & Cross-Dock Facilities
- Automotive Parts Distribution
- Pharmaceutical & Medical Supply Warehouses
- Industrial Parts & MRO Distribution
- Courier, Parcel & Freight Sorting Hubs
Recommended Transformers for Warehousing & Distribution
The following transformer types are most commonly specified for warehouse and distribution centre electrical systems. 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 Warehousing & Distribution
Use the following as a baseline specification guide for warehouse and distribution centre electrical design.
General Warehouse Lighting Panel Feed | 30 – 150 kVA |
Forklift Battery Charging Bank (10–20 chargers) | 75 – 200 kVA |
Forklift Battery Charging Bank (20–50 chargers) | 150 – 500 kVA |
EV Fleet Charging (Level 2, 10–20 stations) | 75 – 200 kVA |
EV Fleet Charging (DC Fast Charge bank) | 150 – 500 kVA |
Conveyor / Sortation System MCC | 50 – 300 kVA |
Automated Storage & Retrieval (ASRS) | 75 – 500 kVA |
Refrigeration Compressor Room | 75 – 300 kVA |
Dock Equipment & Door Controls | 5 – 30 kVA |
Full Warehouse / Distribution Centre Main | 300 – 1,000 kVA+ |
For EV and battery charging, account for simultaneous charging demand — size at peak concurrent charging load x 1.25. Do not assume diversity on charging banks without confirmed usage data.
Primary (Input) | 600V or 575V, 3-phase (standard Canadian warehouse service) |
Secondary — General Distribution | 120/208V, 3-phase, 4-wire or 120/240V single-phase |
Secondary — Conveyor / MCC | 480V or 208V, 3-phase |
Secondary — EV / Battery Charging | 208V or 480V, 3-phase (match charger input voltage) |
Imported Automation Equipment | 600V → 400V, 460V, or 208V as required by equipment nameplate |
Taps | ±2.5% and ±5% standard — useful for long distribution runs in large warehouses |
NEMA 1 | Dedicated electrical rooms in conditioned warehouse space |
NEMA 12 (Dust-tight) | Open warehouse floor locations with dust, debris, or forklift exhaust |
NEMA 3R (Rainproof) | Dock areas, loading bays, outdoor yard equipment, and EV charger yard feeds |
Encapsulated | Cold storage areas, freezer docks, condensation-prone environments, and outdoor yard installations |
NEMA 4 / 4X | Wash-down areas in food and pharmaceutical distribution — fully sealed against cleaning chemicals |
Electrical Room (Indoor) | Main step-down and large distribution transformers — NEMA 1, climate consideration for heat load |
Warehouse Floor (Indoor) | NEMA 12 minimum — forklift traffic, dust, and vibration are common |
Dock Area | NEMA 3R — exposed to outdoor conditions through open dock doors; temperature cycling is significant |
Cold Storage (Indoor) | Encapsulated — condensation forms on surfaces as cold room equipment warms during defrost cycles |
Outdoor Yard | NEMA 3R on concrete pad — EV charger yard feeds, yard lighting, and trailer power pedestals |
Clearances | 36″ front, 18″ sides — critical in busy warehouse environments where forklift access is a risk |
Canadian Standard | CSA C22.2 No. 47 — mandatory for all Canadian warehouse installations |
US Standard | UL 506 / UL 1561 — required for US distribution centre projects |
Energy Efficiency | NRCan DOE 2016 compliant units available — supports sustainability reporting and utility rebate programs |
Electrical Code | CEC Part I governs installation; verify dock and cold storage requirements with local AHJ |
EV Charging | CEC Section 86 governs EV charging installation — transformer feeding EV chargers must be appropriately sized and certified |
Food Safety | CFIA / FDA-adjacent facilities may require specific enclosure materials and coatings — confirm with facility operator |
K-1 (Standard) | Simple resistive and motor loads only — not appropriate for charger or conveyor VFD feeds |
K-4 | General warehouse distribution with mixed lighting and small motor loads |
K-13 Recommended | Battery charging banks, EV charger feeds, conveyor VFD panels, AGV charging stations, and ASRS systems |
K-20 | Large high-density forklift charging rooms or DC fast charger banks with very high harmonic content |
Harmonic Sources | Battery chargers (switch-mode), EV chargers, VFDs on conveyors and AGVs, LED driver power supplies |
Neutral Sizing | Double-sized neutral standard for K-13 and above — charging loads generate significant triplen harmonics |
EV Charger Note | DC fast chargers (Level 3) are among the most harmonically polluted loads — specify K-13 minimum, K-20 for large banks |
Battery charging and EV charger feeds are frequently under-specified. A standard K-1 transformer on a forklift charging bank will overheat and fail. Specify K-13 as the minimum for all charging applications.
Cold Storage | Encapsulated units rated for low ambient temperature; specify if transformer is inside the cold envelope |
Dock Temperature Cycling | Dock doors open to outdoor temperatures — transformers in dock areas experience significant thermal cycling; NEMA 3R minimum |
Forklift Vibration | Specify vibration isolation pads for all floor-mounted transformers in active forklift areas |
Cleaning Chemicals | Food and pharmaceutical distribution centres — specify encapsulated or NEMA 4/4X with appropriate coatings |
Dust & Debris | Automotive parts and industrial MRO warehouses — NEMA 12 for all open floor locations |
Altitude | Western Canada distribution hubs — derate above 1,000m for Calgary, Edmonton, and BC interior sites |
Frequently Asked Questions — Warehousing & Distribution
What transformer do I need for a forklift battery charging room?
Check each charger’s voltage, phase, amperage, power rating, and expected simultaneous use. Because many chargers create harmonics, a K-factor-rated isolation transformer may be appropriate for larger charging banks.
How do I size a transformer for EV fleet charging?
Calculate the total charger demand based on charger quantity, power rating, voltage, phase, efficiency, and expected simultaneous use. Also allow for continuous loading, future expansion, and the building’s available electrical capacity.
What K-factor rating do I need for a conveyor system transformer?
The required K-factor depends on the number of VFDs, the percentage of non-linear load, and the harmonic current produced. K-13 is often considered for VFD-heavy conveyor systems, but final selection should follow manufacturer data or a harmonic assessment.
What transformer do I need for an imported automated storage and retrieval system?
Compare the equipment’s voltage, phase, frequency, and kVA with the building supply. An autotransformer is suitable when only voltage conversion is needed, while an isolation transformer may be preferred for added separation and protection.
What enclosure do I need for a transformer in a cold storage warehouse?
Encapsulated transformers are often suitable for cold storage because they provide added protection against moisture and condensation. Temperature, defrost cycles, cleaning procedures, and installation location should also be considered.
Can one transformer supply both warehouse lighting and a charging room?
It may be possible, but charging equipment can introduce harmonics, high demand, and voltage disturbances. Separate transformers often provide better load control, easier expansion, and more appropriate K-factor selection.
How quickly can Transformer Source deliver warehouse transformers?
Delivery depends on voltage, kVA, phase, enclosure, K-factor, certification, and stock availability. Common configurations may ship from Canadian stock, while custom units usually require additional lead time.
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Ready to Specify Your Warehouse Transformer?
From forklift charging rooms and EV fleet depots to automated conveyor systems and cold storage distribution — our technical team will help you select the right transformer, right-sized, with the K-factor rating your loads actually require.
Have this information ready:
- Load type and quantity (chargers, VFD drives, lighting, mixed)
- Total connected kVA or kW
- Primary voltage (600V, 575V, 480V)
- Required secondary voltage
- Installation environment (electrical room, dock, cold storage, outdoor yard)
- Any special requirements: K-factor, encapsulation, NEMA 4, NRCan efficiency