Switchgear Maintenance in Canada: What Facility Owners Need to Know

Ampera Energy Solutions — Insights

Switchgear is the one piece of electrical equipment most facilities can't afford to lose and most facilities neglect. It sits in a locked room, rarely gets touched, and as long as the lights stay on, nobody thinks about it. Then a 30-year-old breaker fails to trip during a fault, or a loose bus connection cooks itself over a long weekend, and suddenly the whole plant is down with a replacement lead time measured in months.

This article covers why switchgear maintenance matters more now than it did ten years ago, what Canadian standards say about it, what a proper maintenance program includes, and how to decide when to keep maintaining versus replace.

Why it matters more in 2026 and beyond

Replacement is slower and more expensive than ever. New switchgear is quoting at roughly 20 to 44 weeks from major manufacturers, longer for custom medium-voltage lineups, and prices are up around 50% from 2021 levels. An unplanned failure that used to mean a two-week scramble now means a season-long shutdown or a very expensive rush order. Maintenance is cheap by comparison.

The installed base is aging. A large share of the switchgear in Canadian industrial plants, hospitals, institutions, and commercial buildings dates from the 1970s through 1990s. Much of it is still perfectly serviceable — if it's been maintained. Unmaintained gear from that era is the leading cause of the failures we get called out to.

Arc flash liability. Under CSA Z462, the arc flash incident energy calculations that determine PPE and safe working practices assume protective devices operate as designed. A breaker that's slow to trip because the mechanism has gummed up can turn a manageable arc flash into a fatal one. Maintenance is a safety-of-workers issue, not just a reliability one.

Insurance and regulatory expectations. Insurers increasingly ask for evidence of electrical maintenance programs, and provincial safety authorities take a dim view of failures traced to neglected equipment.

The standards framework in Canada

Switchgear maintenance in Canada is governed by a combination of standards and manufacturer guidance:

• CSA Z463 — Maintenance of electrical systems. The Canadian standard that defines what an electrical maintenance program should look like: condition assessment, risk-based intervals, documentation, and qualified personnel. If your facility doesn't have a program that maps to Z463, that's the starting point.
• CSA Z462 — Workplace electrical safety. Governs how maintenance work is performed safely: energized work permits, lockout, arc flash and shock boundaries, PPE selection. Z462 explicitly ties safe work to properly maintained equipment.
• CSA C22.1 — Canadian Electrical Code. Installation requirements, including for replacements and modifications made during maintenance.
• NETA MTS (Maintenance Testing Specifications). The InterNational Electrical Testing Association's specifications are widely used in Canada as the reference for what tests to perform and what results are acceptable. Most testing firms and switchgear manufacturers reference NETA.
• Manufacturer instructions. The OEM's maintenance manual for your specific breaker and lineup is authoritative for lubrication, inspection points, and service intervals.
• NFPA 70B is a US standard but frequently referenced in Canada alongside Z463 for its detailed guidance on inspection intervals and procedures.

Provincial layers apply too. In Alberta, the Safety Codes Act and OHS legislation set the requirements for permits, qualified workers, and safe work practices.

What a switchgear maintenance program includes

A proper program is more than a once-a-year cleaning. It layers several types of activity:

Continuous and routine monitoring

• Infrared thermography under load — the single most cost-effective diagnostic for finding loose connections and overloaded components before they fail. Annual at minimum; more often for critical gear.
• Visual inspection of the switchgear room: moisture, dust, rodent activity, heater and ventilation function, indicator lights and meters.
• Trending of partial discharge or ultrasonic readings on medium-voltage gear where the technology is installed.

Periodic de-energized maintenance

Typically every 1–3 years for the lineup, more or less frequently depending on criticality and environment (a dusty, humid, or corrosive location needs more attention than a clean control room). Includes:

• Cleaning of bus, insulators, and compartments.
• Inspection and torque verification of bus and cable connections.
• Insulation resistance testing on bus and cable.
• Inspection of shutters, interlocks, racking mechanisms, and door hardware.
• Space heater and ventilation checks.
• Verification of labels, single-line diagrams, and arc flash labels.

Circuit breaker servicing

Breakers are the mechanical heart of the system and are where most failures originate. Depending on breaker type (air, vacuum, SF6, or molded case), servicing includes:

• Mechanism inspection, cleaning, and lubrication with the manufacturer-specified lubricant. Old, hardened grease is the number one cause of slow or failed operation.
• Contact inspection and, for vacuum breakers, contact wear and vacuum integrity testing.
• Contact resistance (ductor) testing.
• Timing and travel analysis.
• Insulation resistance and, where appropriate, hi-pot testing.
• Primary or secondary injection testing of trip units to verify the breaker actually trips at the settings on the label.
• Operation checks of charging motors, close and trip coils, and auxiliary contacts.

Protective relay testing

Relays are tested to confirm they operate at the correct pickup and time delay. Electromechanical relays drift and need periodic recalibration; microprocessor relays are more stable but still need functional verification and firmware and settings review. Every relay test should be checked against the current protection coordination study.

Battery systems

DC control power supplies the trip coils. A dead or weak battery bank means the breaker won't trip when it matters. Battery systems need their own inspection and load-test schedule.

Documentation

Every test generates data. Keep it. Trended test results are what tell you a breaker is degrading before it fails, and are what you'll need to show an insurer or inspector.

Maintain or replace?

Not every piece of aging switchgear should be kept alive forever. Signs it's time to plan a replacement:

• Spare parts and replacement breakers are only available through the surplus market, and supply is thinning.
• Repeated failures or test results trending toward limits despite maintenance.
• The gear can't support current protection needs — no room for modern relays, no arc-resistant construction where it's now warranted, or interrupting ratings that no longer meet the available fault current.
• Asbestos or PCB-containing components complicate every service.
• The facility's load has grown well beyond what the lineup was designed for.

Given current lead times, the replace decision needs to be made a year or more ahead of when you need the new gear in service. That's exactly why a documented maintenance program matters: it gives you the trend data to make the call early instead of in the middle of an outage. And in the meantime, reconditioned breakers and surplus components can keep a legacy lineup reliable while you plan.

What good looks like

A well-run facility has:

1. A written electrical maintenance program aligned with CSA Z463.
2. An up-to-date single-line diagram and a current arc flash study (typically reviewed every five years or after any significant change).
3. An asset register listing every breaker, relay, and transformer with its last test date and results.
4. Annual infrared surveys and a defined de-energized maintenance interval.
5. Qualified personnel — either in-house or contracted — doing the work under Z462-compliant procedures.
6. Trending of test results so decisions are based on data, not on how old the paint looks.

How Ampera helps

Ampera Energy Solutions provides switchgear maintenance, testing, and condition assessment for industrial, commercial, and institutional facilities across Alberta and Western Canada. Our background is in industrial and oilfield electrical work, where switchgear reliability isn't optional. We can build a maintenance program from scratch, execute the periodic servicing and testing, source reconditioned breakers and parts for legacy lineups, and help you plan replacements before they become emergencies. Reach out to schedule a condition assessment.

Ampera Energy Solutions Inc. is an Alberta-based electrical contracting and advisory firm serving industrial, commercial, and energy clients across Western Canada.