A mining operation in Nunavut needed reliable backup power in one of the most punishing environments in Canada — sub-Arctic cold, vibration, airborne dust, humidity swings, and a power grid that isn't always there. Off-the-shelf UPS units don't survive there. Here's how we specified and deployed a 50 kVA rugged industrial UPS protecting ventilation, safety monitoring, processing, and communications.
Why commercial UPS units fail in mining environments
A standard rack UPS is designed for a clean server room: 18–28°C, low humidity, no dust, no vibration, reliable grid input. A Nunavut mining site has none of those conditions. Temperatures drop below the operating range of sealed lead-acid batteries. Airborne particulate destroys fans and clogs vents. Vibration loosens connectors. Grid irregularities — sags, surges, harmonics from heavy machinery — stress UPS electronics past what commercial units are rated for.
The result, if you deploy commercial hardware in these environments, is premature failure: batteries that die in 12–18 months instead of 3–5 years, fan failures that cascade into thermal shutdowns, and intermittent faults that are almost impossible to diagnose remotely. Remote sites make that failure pattern exponentially expensive — every technician visit is a flight in, accommodation, and hours of downtime.
Project scope
Site assessment
Our team assessed the site's power profile, critical load inventory, physical installation conditions, and service-access constraints. The load analysis identified four systems that could not tolerate even short power loss: main ventilation fans (a direct safety issue underground or in enclosed processing areas), safety monitoring and gas-detection systems, radio and satellite communications, and the core processing control loop. Those became the protected load. Non-critical loads stayed on unprotected grid power to keep UPS sizing reasonable.
Selecting a rugged industrial UPS
We specified a 50 kVA rugged industrial UPS purpose-built for harsh environments, not a re-rated commercial unit. Key qualifications:
- Wide operating-temperature range — rated for the sub-Arctic lows the site experiences, not just the 0–40°C of standard units.
- Dust- and vibration-resistant enclosure — IP-rated seals, reinforced mounting, conformally coated PCBs.
- Hot-swap battery modules — onsite staff can replace battery packs without flying a specialist in, and without taking the protected load offline.
- SNMP / remote diagnostics — real-time status, event logging, and pre-failure alerts visible from our monitoring centre, so most service decisions can be made remotely.
- Three-phase input handling — accepts the heavy-industrial feed without needing additional conditioning.
- Separate temperature-controlled battery enclosure — keeps the battery string at optimal temperature even when the UPS itself is in a less-controlled space.
Installation and configuration
The install was executed by our specialist team with minimal disruption to active mining operations. The UPS frame was integrated into the site's power grid, with the battery string placed in a separate insulated, temperature-controlled enclosure so battery life isn't sacrificed to ambient cold. A bypass switch was installed so the UPS can be fully isolated for annual servicing without requiring a site-wide power shutdown.
SNMP monitoring was configured to report battery impedance, temperature, load, and event history back to our monitoring centre. Alert thresholds were tuned to the site's normal operating envelope so we see real issues early without being buried in false positives from routine grid transients.
Ongoing preventive maintenance
The operation enrolled in our preventive maintenance program, which is essential for remote sites where reactive repair is disproportionately expensive. The program includes:
- Scheduled on-site inspections covering thermal imaging, connector torque, fan wear, and dust contamination.
- Battery testing on schedule — impedance, capacity, terminal voltage — with replacements planned before end-of-life rather than after failure.
- 24/7 remote monitoring of battery health, load, and event logs from our operations centre.
- Firmware updates and alarm-threshold recalibration as the site's operating envelope evolves.
- Emergency escalation with pre-staged spare modules so hot-swap repairs can be executed by onsite staff with remote guidance.
Products deployed
Explore the rugged and industrial UPS families relevant to mining and harsh-environment deployments, plus replacement battery options:
Results and impact
The Nunavut deployment has operated without unplanned outage on the protected load since commissioning. Remote monitoring has flagged three separate events early — one battery module approaching end-of-life, one grid excursion that would have damaged unprotected equipment, and one fan bearing beginning to wear — each of which was resolved during scheduled maintenance rather than reactively. The hot-swap battery architecture has enabled onsite staff to handle routine battery replacement with remote guidance, eliminating the need for a technician flight for that work.
Frequently asked questions
How long do UPS batteries last in harsh mining environments?
Sealed lead-acid UPS batteries typically last 3–5 years in controlled environments, but unprotected deployments in mining can see that drop to 12–18 months. Housing the battery string in a separate temperature-controlled enclosure — as we did on this project — keeps them in the rated operating window even when the surrounding environment isn't. Scheduled impedance testing catches weakening modules before they fail. See our UPS battery replacement service.
Are the UPS batteries on a mining site hot-swappable?
Yes — this was a hard requirement for the site. Hot-swap batteries let onsite staff replace modules without powering down critical equipment and without needing a specialist technician on site for every routine change. Combined with remote monitoring and pre-staged spares, it dramatically reduces the cost of keeping a remote deployment healthy.
How do you extend UPS battery runtime on a remote site?
Three levers: prioritise the protected load (only truly critical systems on UPS, not convenience loads), regular battery testing to surface weakening modules before they drag down the rest of the string, and environmental control on the battery enclosure itself — keeping batteries within their rated temperature band is the single biggest factor in extending usable capacity on a cold-climate site.
What makes an industrial UPS different from a commercial unit?
Industrial UPS units are designed for harsh operating conditions: wider temperature ranges, dust and vibration resistance, conformal-coated electronics that resist humidity and particulate contamination, and reinforced mechanical construction. They also typically accept dirtier grid input (sags, surges, harmonics from heavy machinery) without stress on the electronics. Deploying a commercial UPS in a mining environment isn't a cost saving — it's a guaranteed failure on a longer timeline.
Do you service remote and northern sites across Canada?
Yes. UPSPLUSBATTERY ships industrial UPS hardware nationally, and our service partner GDF Technologies handles installation, maintenance, and emergency service on remote industrial sites across Canada, including northern territories and mining operations. For sites where a technician visit is expensive, we prioritise designs that maximise remote diagnostics and enable onsite staff to handle routine swaps with remote guidance.
Whether you're sourcing rugged hardware or need a team that's installed UPS systems on remote Canadian sites before, we can help — directly or through our service partner GDF Technologies.
APC, Eaton, and Tripp Lite industrial UPS families — specified for mining, manufacturing, and harsh-environment deployments. Shipped across Canada.
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