Commercial Transformer Installation & Replacement in Toronto
Portman Electric installs and replaces commercial transformers in Toronto — dry-type step-down transformers that feed 120/208V panels from 600V distribution, sized to the load and installed with the clearances and protection they need.
- Building owners
- Facility managers
- General contractors
Call Us If…
Real situations, not a capabilities list. If one of these sounds familiar, you're in the right place.
- 01A transformer is unusually loud, hot or smells burnt.
- 02A 120/208V panel fed from a transformer has gone dead.
- 03A tenant fit-out needs a new transformer and panel.
- 04Load has grown beyond the existing transformer's rating.
- 05A renovation requires a transformer to be relocated.
What a Commercial Transformer Does
In a 347/600V building, step-down transformers convert 600V to 120/208V for receptacles, small equipment and many tenant panels. When a transformer fails, everything it feeds goes down; when it is undersized, it runs hot and ages early.
Transformer Work We Do
- New dry-type transformer installation for fit-outs and expansions
- Replacement of failed or undersized transformers
- Primary and secondary protection and feeders
- Grounding and bonding of transformer secondaries
- Relocation during renovations
- Troubleshooting transformer-fed panels
Sizing and Placement
A transformer is sized to the connected and expected load, with consideration for future additions. Placement needs ventilation, clearances and accessible disconnecting means. We assess both before quoting, and where a replacement unit has a long lead time we explain interim options.
When to Call About a Transformer
Loud humming beyond normal, discolouration, a burning smell, excessive heat or a dead downstream panel are reasons to call. Keep people clear of a transformer showing these signs; if there is smoke, call 911.
Transformer Installation
- STEP 1
Load review and site assessment.
- STEP 2
Transformer sizing, placement and written quote.
- STEP 3
ESA notification and equipment ordering.
- STEP 4
Planned shutdown, installation and connection.
- STEP 5
Testing and re-energization.
- STEP 6
Inspection and documentation.
Safety first. If you see smoke or fire, or someone has been shocked, call 911 first. Do not open panels, reset repeatedly tripping breakers or work on live equipment yourself — keep people clear and call us. Urgent? Call 647-835-7757 or see commercial emergency service.
Planning Work? Send the Scope or Drawings.
Project address, schedule, tender deadline and any drawings or specifications. Incomplete packages are fine — we'll tell you what's missing.
Need a repair instead?
Book a service call for faults and failures — no drawings needed.
Frequently Asked Questions
Related Commercial Services
Need commercial electrical service?
Call Portman Electric · 647-835-7757